1 files changed, 328 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c
new file mode 100644
index 000000000..a17a6dd8d
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/volt/base.c
@@ -0,0 +1,328 @@
+/*
+ * Copyright 2013 Red Hat Inc.
+ *
+ * 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: Ben Skeggs
+ */
+#include "priv.h"
+
+#include <subdev/bios.h>
+#include <subdev/bios/vmap.h>
+#include <subdev/bios/volt.h>
+#include <subdev/therm.h>
+
+int
+nvkm_volt_get(struct nvkm_volt *volt)
+{
+	int ret, i;
+
+	if (volt->func->volt_get)
+		return volt->func->volt_get(volt);
+
+	ret = volt->func->vid_get(volt);
+	if (ret >= 0) {
+		for (i = 0; i < volt->vid_nr; i++) {
+			if (volt->vid[i].vid == ret)
+				return volt->vid[i].uv;
+		}
+		ret = -EINVAL;
+	}
+	return ret;
+}
+
+static int
+nvkm_volt_set(struct nvkm_volt *volt, u32 uv)
+{
+	struct nvkm_subdev *subdev = &volt->subdev;
+	int i, ret = -EINVAL, best_err = volt->max_uv, best = -1;
+
+	if (volt->func->volt_set)
+		return volt->func->volt_set(volt, uv);
+
+	for (i = 0; i < volt->vid_nr; i++) {
+		int err = volt->vid[i].uv - uv;
+		if (err < 0 || err > best_err)
+			continue;
+
+		best_err = err;
+		best = i;
+		if (best_err == 0)
+			break;
+	}
+
+	if (best == -1) {
+		nvkm_error(subdev, "couldn't set %iuv\n", uv);
+		return ret;
+	}
+
+	ret = volt->func->vid_set(volt, volt->vid[best].vid);
+	nvkm_debug(subdev, "set req %duv to %duv: %d\n", uv,
+		   volt->vid[best].uv, ret);
+	return ret;
+}
+
+int
+nvkm_volt_map_min(struct nvkm_volt *volt, u8 id)
+{
+	struct nvkm_bios *bios = volt->subdev.device->bios;
+	struct nvbios_vmap_entry info;
+	u8  ver, len;
+	u32 vmap;
+
+	vmap = nvbios_vmap_entry_parse(bios, id, &ver, &len, &info);
+	if (vmap) {
+		if (info.link != 0xff) {
+			int ret = nvkm_volt_map_min(volt, info.link);
+			if (ret < 0)
+				return ret;
+			info.min += ret;
+		}
+		return info.min;
+	}
+
+	return id ? id * 10000 : -ENODEV;
+}
+
+int
+nvkm_volt_map(struct nvkm_volt *volt, u8 id, u8 temp)
+{
+	struct nvkm_bios *bios = volt->subdev.device->bios;
+	struct nvbios_vmap_entry info;
+	u8  ver, len;
+	u32 vmap;
+
+	vmap = nvbios_vmap_entry_parse(bios, id, &ver, &len, &info);
+	if (vmap) {
+		s64 result;
+
+		if (volt->speedo < 0)
+			return volt->speedo;
+
+		if (ver == 0x10 || (ver == 0x20 && info.mode == 0)) {
+			result  = div64_s64((s64)info.arg[0], 10);
+			result += div64_s64((s64)info.arg[1] * volt->speedo, 10);
+			result += div64_s64((s64)info.arg[2] * volt->speedo * volt->speedo, 100000);
+		} else if (ver == 0x20) {
+			switch (info.mode) {
+			/* 0x0 handled above! */
+			case 0x1:
+				result =  ((s64)info.arg[0] * 15625) >> 18;
+				result += ((s64)info.arg[1] * volt->speedo * 15625) >> 18;
+				result += ((s64)info.arg[2] * temp * 15625) >> 10;
+				result += ((s64)info.arg[3] * volt->speedo * temp * 15625) >> 18;
+				result += ((s64)info.arg[4] * volt->speedo * volt->speedo * 15625) >> 30;
+				result += ((s64)info.arg[5] * temp * temp * 15625) >> 18;
+				break;
+			case 0x3:
+				result = (info.min + info.max) / 2;
+				break;
+			case 0x2:
+			default:
+				result = info.min;
+				break;
+			}
+		} else {
+			return -ENODEV;
+		}
+
+		result = min(max(result, (s64)info.min), (s64)info.max);
+
+		if (info.link != 0xff) {
+			int ret = nvkm_volt_map(volt, info.link, temp);
+			if (ret < 0)
+				return ret;
+			result += ret;
+		}
+		return result;
+	}
+
+	return id ? id * 10000 : -ENODEV;
+}
+
+int
+nvkm_volt_set_id(struct nvkm_volt *volt, u8 id, u8 min_id, u8 temp,
+		 int condition)
+{
+	int ret;
+
+	if (volt->func->set_id)
+		return volt->func->set_id(volt, id, condition);
+
+	ret = nvkm_volt_map(volt, id, temp);
+	if (ret >= 0) {
+		int prev = nvkm_volt_get(volt);
+		if (!condition || prev < 0 ||
+		    (condition < 0 && ret < prev) ||
+		    (condition > 0 && ret > prev)) {
+			int min = nvkm_volt_map(volt, min_id, temp);
+			if (min >= 0)
+				ret = max(min, ret);
+			ret = nvkm_volt_set(volt, ret);
+		} else {
+			ret = 0;
+		}
+	}
+	return ret;
+}
+
+static void
+nvkm_volt_parse_bios(struct nvkm_bios *bios, struct nvkm_volt *volt)
+{
+	struct nvkm_subdev *subdev = &bios->subdev;
+	struct nvbios_volt_entry ivid;
+	struct nvbios_volt info;
+	u8  ver, hdr, cnt, len;
+	u32 data;
+	int i;
+
+	data = nvbios_volt_parse(bios, &ver, &hdr, &cnt, &len, &info);
+	if (data && info.vidmask && info.base && info.step && info.ranged) {
+		nvkm_debug(subdev, "found ranged based VIDs\n");
+		volt->min_uv = info.min;
+		volt->max_uv = info.max;
+		for (i = 0; i < info.vidmask + 1; i++) {
+			if (info.base >= info.min &&
+				info.base <= info.max) {
+				volt->vid[volt->vid_nr].uv = info.base;
+				volt->vid[volt->vid_nr].vid = i;
+				volt->vid_nr++;
+			}
+			info.base += info.step;
+		}
+		volt->vid_mask = info.vidmask;
+	} else if (data && info.vidmask && !info.ranged) {
+		nvkm_debug(subdev, "found entry based VIDs\n");
+		volt->min_uv = 0xffffffff;
+		volt->max_uv = 0;
+		for (i = 0; i < cnt; i++) {
+			data = nvbios_volt_entry_parse(bios, i, &ver, &hdr,
+						       &ivid);
+			if (data) {
+				volt->vid[volt->vid_nr].uv = ivid.voltage;
+				volt->vid[volt->vid_nr].vid = ivid.vid;
+				volt->vid_nr++;
+				volt->min_uv = min(volt->min_uv, ivid.voltage);
+				volt->max_uv = max(volt->max_uv, ivid.voltage);
+			}
+		}
+		volt->vid_mask = info.vidmask;
+	} else if (data && info.type == NVBIOS_VOLT_PWM) {
+		volt->min_uv = info.base;
+		volt->max_uv = info.base + info.pwm_range;
+	}
+}
+
+static int
+nvkm_volt_speedo_read(struct nvkm_volt *volt)
+{
+	if (volt->func->speedo_read)
+		return volt->func->speedo_read(volt);
+	return -EINVAL;
+}
+
+static int
+nvkm_volt_init(struct nvkm_subdev *subdev)
+{
+	struct nvkm_volt *volt = nvkm_volt(subdev);
+	int ret = nvkm_volt_get(volt);
+	if (ret < 0) {
+		if (ret != -ENODEV)
+			nvkm_debug(subdev, "current voltage unknown\n");
+		return 0;
+	}
+	nvkm_debug(subdev, "current voltage: %duv\n", ret);
+	return 0;
+}
+
+static int
+nvkm_volt_oneinit(struct nvkm_subdev *subdev)
+{
+	struct nvkm_volt *volt = nvkm_volt(subdev);
+
+	volt->speedo = nvkm_volt_speedo_read(volt);
+	if (volt->speedo > 0)
+		nvkm_debug(&volt->subdev, "speedo %x\n", volt->speedo);
+
+	if (volt->func->oneinit)
+		return volt->func->oneinit(volt);
+
+	return 0;
+}
+
+static void *
+nvkm_volt_dtor(struct nvkm_subdev *subdev)
+{
+	return nvkm_volt(subdev);
+}
+
+static const struct nvkm_subdev_func
+nvkm_volt = {
+	.dtor = nvkm_volt_dtor,
+	.init = nvkm_volt_init,
+	.oneinit = nvkm_volt_oneinit,
+};
+
+void
+nvkm_volt_ctor(const struct nvkm_volt_func *func, struct nvkm_device *device,
+	       enum nvkm_subdev_type type, int inst, struct nvkm_volt *volt)
+{
+	struct nvkm_bios *bios = device->bios;
+	int i;
+
+	nvkm_subdev_ctor(&nvkm_volt, device, type, inst, &volt->subdev);
+	volt->func = func;
+
+	/* Assuming the non-bios device should build the voltage table later */
+	if (bios) {
+		u8 ver, hdr, cnt, len;
+		struct nvbios_vmap vmap;
+
+		nvkm_volt_parse_bios(bios, volt);
+		nvkm_debug(&volt->subdev, "min: %iuv max: %iuv\n",
+			   volt->min_uv, volt->max_uv);
+
+		if (nvbios_vmap_parse(bios, &ver, &hdr, &cnt, &len, &vmap)) {
+			volt->max0_id = vmap.max0;
+			volt->max1_id = vmap.max1;
+			volt->max2_id = vmap.max2;
+		} else {
+			volt->max0_id = 0xff;
+			volt->max1_id = 0xff;
+			volt->max2_id = 0xff;
+		}
+	}
+
+	if (volt->vid_nr) {
+		for (i = 0; i < volt->vid_nr; i++) {
+			nvkm_debug(&volt->subdev, "VID %02x: %duv\n",
+				   volt->vid[i].vid, volt->vid[i].uv);
+		}
+	}
+}
+
+int
+nvkm_volt_new_(const struct nvkm_volt_func *func, struct nvkm_device *device,
+	       enum nvkm_subdev_type type, int inst, struct nvkm_volt **pvolt)
+{
+	if (!(*pvolt = kzalloc(sizeof(**pvolt), GFP_KERNEL)))
+		return -ENOMEM;
+	nvkm_volt_ctor(func, device, type, inst, *pvolt);
+	return 0;
+}