[Nouveau] [PATCH 19/32] bios: Add thermal policies table

[Karol Herbst]

Signed-off-by: Karol Herbst <karolherbst at gmail.com>
Acked-by: Pierre Moreau <pierre.morrow at free.fr>
---
 .../include/nvkm/subdev/bios/thermal_policies.h    | 25 +++++++
 drm/nouveau/nvkm/subdev/bios/Kbuild                |  1 +
 drm/nouveau/nvkm/subdev/bios/thermal_policies.c    | 81 ++++++++++++++++++++++
 3 files changed, 107 insertions(+)
 create mode 100644 drm/nouveau/include/nvkm/subdev/bios/thermal_policies.h
 create mode 100644 drm/nouveau/nvkm/subdev/bios/thermal_policies.c

diff --git a/drm/nouveau/include/nvkm/subdev/bios/thermal_policies.h b/drm/nouveau/include/nvkm/subdev/bios/thermal_policies.h
new file mode 100644
index 00000000..70a203b2
--- /dev/null
+++ b/drm/nouveau/include/nvkm/subdev/bios/thermal_policies.h
@@ -0,0 +1,25 @@
+#ifndef __NVBIOS_THERMAL_POLICIES_H__
+#define __NVBIOS_THERMAL_POLICIES_H__
+
+struct nvbios_thermal_policies_header {
+	u32 offset;
+
+	u8 version;
+	u8 hlen;
+	u8 ecount;
+	u8 elen;
+};
+struct nvbios_thermal_policies_entry {
+	u8  mode;
+	u16 t0;
+	s16 down_offset;
+	s16 up_offset;
+};
+
+int nvbios_thermal_policies_parse(struct nvkm_bios *,
+				  struct nvbios_thermal_policies_header *);
+int nvbios_thermal_policies_entry(struct nvkm_bios *,
+				  struct nvbios_thermal_policies_header *,
+				  u8 idx,
+				  struct nvbios_thermal_policies_entry *);
+#endif
diff --git a/drm/nouveau/nvkm/subdev/bios/Kbuild b/drm/nouveau/nvkm/subdev/bios/Kbuild
index 6b4f1e06..38f31dd0 100644
--- a/drm/nouveau/nvkm/subdev/bios/Kbuild
+++ b/drm/nouveau/nvkm/subdev/bios/Kbuild
@@ -30,6 +30,7 @@ nvkm-y += nvkm/subdev/bios/shadowramin.o
 nvkm-y += nvkm/subdev/bios/shadowrom.o
 nvkm-y += nvkm/subdev/bios/timing.o
 nvkm-y += nvkm/subdev/bios/therm.o
+nvkm-y += nvkm/subdev/bios/thermal_policies.o
 nvkm-y += nvkm/subdev/bios/vmap.o
 nvkm-y += nvkm/subdev/bios/volt.o
 nvkm-y += nvkm/subdev/bios/vpstate.o
diff --git a/drm/nouveau/nvkm/subdev/bios/thermal_policies.c b/drm/nouveau/nvkm/subdev/bios/thermal_policies.c
new file mode 100644
index 00000000..f6a0a843
--- /dev/null
+++ b/drm/nouveau/nvkm/subdev/bios/thermal_policies.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright 2017 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 <subdev/bios.h>
+#include <subdev/bios/bit.h>
+#include <subdev/bios/thermal_policies.h>
+
+static u32
+nvbios_thermal_policies_offset(struct nvkm_bios *b)
+{
+	struct bit_entry bit_P;
+
+	if (!bit_entry(b, 'P', &bit_P)) {
+		if (bit_P.version == 2 && bit_P.length >= 0x50)
+			return nvbios_rd32(b, bit_P.offset + 0x50);
+	}
+
+	return 0;
+}
+
+int
+nvbios_thermal_policies_parse(struct nvkm_bios *b,
+			      struct nvbios_thermal_policies_header *h)
+{
+	if (!h)
+		return -EINVAL;
+
+	h->offset = nvbios_thermal_policies_offset(b);
+	if (!h->offset)
+		return -ENODEV;
+
+	h->version = nvbios_rd08(b, h->offset);
+	switch (h->version) {
+	case 0x10:
+		h->hlen     = nvbios_rd08(b, h->offset + 0x1);
+		h->elen     = nvbios_rd08(b, h->offset + 0x2);
+		h->ecount   = nvbios_rd08(b, h->offset + 0x3);
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+int
+nvbios_thermal_policies_entry(struct nvkm_bios *b,
+			      struct nvbios_thermal_policies_header *h,
+			      u8 idx, struct nvbios_thermal_policies_entry *e)
+{
+	u32 offset;
+
+	if (!e || !h || idx > h->ecount)
+		return -EINVAL;
+
+	offset = h->offset + h->hlen + idx * h->elen;
+	e->mode = nvbios_rd08(b, offset);
+	e->t0 = nvbios_rd16(b, offset + 0x2);
+	e->down_offset = nvbios_rd16(b, offset + 0x12);
+	e->up_offset = nvbios_rd16(b, offset + 0x14);
+
+	return 0;
+}
-- 
2.15.0