thr3ads.net - Nouveau - [Nouveau] [PATCH v2 06/22] volt: parse the both max voltage entries [Mar 2016]

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Karol Herbst

2016-Mar-21 16:16 UTC

[Nouveau] [PATCH v2 00/22] Volting/Clocking improvements for Fermi and newer

This series fixes most of the issues regarding volting on GPUs with any form
of GPU Boost inside their vbios, which is mainly Kepler and newer, but we find
some boosting related tables in Fermi vbios' already

In the end reclocking should work on most Kepler cards without any issues

v2: boost_mode can now be changed at runtime
    minor fixups

Karol Herbst (22):
  bios/volt: handle voltage table version 0x50 with 0ed header
  volt: properly detect entry based voltage tables
  volt: save the voltage range we are able to set
  volt: add nvkm_volt_map_min function
  clk: don't create cstates which voltage is higher than what the gpu
    can do
  volt: parse the both max voltage entries
  volt: add min_id parameter to nvkm_volt_set_id
  clk: export nvkm_volt_map
  clk: add index field to nvkm_cstate
  add daemon to compare nouveau with blob voltage
  volt: add temperature parameter to nvkm_volt_map
  clk: fixup cstate selection
  clk: respect voltage limits in nvkm_cstate_prog with cstate = -1
  bios: add parsing of BASE CLOCK table
  clk: allow boosting only when NvBoost is set
  volt: don't require perfect fit
  bios/vmap: unk0 field is the mode
  volt: add coefficients I found on my gpu
  clk: save the max clock we can set
  clk: add nvkm_clk_reclock function
  nvif: add boost info and set operations
  debugfs: add boost interface to change the boost_mode

 bin/nv_cmp_volt.c                                | 130 +++++++++++++++++++++
 drm/nouveau/include/nvif/if0001.h                |  15 +++
 drm/nouveau/include/nvkm/subdev/bios/baseclock.h |  24 ++++
 drm/nouveau/include/nvkm/subdev/bios/vmap.h      |   4 +-
 drm/nouveau/include/nvkm/subdev/bios/volt.h      |   5 +-
 drm/nouveau/include/nvkm/subdev/clk.h            |  12 +-
 drm/nouveau/include/nvkm/subdev/volt.h           |   9 +-
 drm/nouveau/nouveau_debugfs.c                    |  76 ++++++++++++
 drm/nouveau/nvkm/engine/device/ctrl.c            |  59 ++++++++++
 drm/nouveau/nvkm/subdev/bios/Kbuild              |   1 +
 drm/nouveau/nvkm/subdev/bios/baseclock.c         |  82 +++++++++++++
 drm/nouveau/nvkm/subdev/bios/vmap.c              |   7 +-
 drm/nouveau/nvkm/subdev/bios/volt.c              |  45 +++++---
 drm/nouveau/nvkm/subdev/clk/base.c               | 131 +++++++++++++++++++--
 drm/nouveau/nvkm/subdev/clk/gf100.c              |   2 +-
 drm/nouveau/nvkm/subdev/clk/gk104.c              |   2 +-
 drm/nouveau/nvkm/subdev/volt/base.c              | 141 +++++++++++++++++++++--
 17 files changed, 696 insertions(+), 49 deletions(-)
 create mode 100644 bin/nv_cmp_volt.c
 create mode 100644 drm/nouveau/include/nvkm/subdev/bios/baseclock.h
 create mode 100644 drm/nouveau/nvkm/subdev/bios/baseclock.c

-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 01/22] bios/volt: handle voltage table version 0x50 with 0ed header

Some Fermi+ gpus have no usefull header in the voltage table, which means
nouveau has to read the voltages out of the entries directly.

The mask may be bigger than 0x1fffff, but this value is already >2V, so it
will
be fine for now.

This patch fixes volting issues on those cards enabling them to switch cstates

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
Reviewed-by: Martin Peres <martin.peres at free.fr>
Tested-by: Pierre Moreau <pierre.morrow at free.fr>
---
 drm/nouveau/nvkm/subdev/bios/volt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drm/nouveau/nvkm/subdev/bios/volt.c
b/drm/nouveau/nvkm/subdev/bios/volt.c
index 6e0a336..81a47b2 100644
--- a/drm/nouveau/nvkm/subdev/bios/volt.c
+++ b/drm/nouveau/nvkm/subdev/bios/volt.c
@@ -142,7 +142,10 @@ nvbios_volt_entry_parse(struct nvkm_bios *bios, int idx, u8
*ver, u8 *len,
 		info->vid     = nvbios_rd08(bios, volt + 0x01) >> 2;
 		break;
 	case 0x40:
+		break;
 	case 0x50:
+		info->voltage = nvbios_rd32(bios, volt) & 0x001fffff;
+		info->vid     = (nvbios_rd32(bios, volt) >> 23) & 0xff;
 		break;
 	}
 	return volt;
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 02/22] volt: properly detect entry based voltage tables

there is a field in the voltage table which tells us if the VIDs are taken from
the entries or calculated through the header

v2: don't break older versions

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
Reviewed-by: Martin Peres <martin.peres at free.fr>
Tested-by: Pierre Moreau <pierre.morrow at free.fr>
---
 drm/nouveau/include/nvkm/subdev/bios/volt.h |  5 ++--
 drm/nouveau/nvkm/subdev/bios/volt.c         | 42 ++++++++++++++++-------------
 drm/nouveau/nvkm/subdev/volt/base.c         |  8 ++++--
 3 files changed, 33 insertions(+), 22 deletions(-)

diff --git a/drm/nouveau/include/nvkm/subdev/bios/volt.h
b/drm/nouveau/include/nvkm/subdev/bios/volt.h
index b0df610..0d91c24 100644
--- a/drm/nouveau/include/nvkm/subdev/bios/volt.h
+++ b/drm/nouveau/include/nvkm/subdev/bios/volt.h
@@ -13,8 +13,9 @@ struct nvbios_volt {
 	u32 base;
 
 	/* GPIO mode */
-	u8  vidmask;
-	s16 step;
+	bool entry_based;
+	u8   vidmask;
+	s16  step;
 
 	/* PWM mode */
 	u32 pwm_freq;
diff --git a/drm/nouveau/nvkm/subdev/bios/volt.c
b/drm/nouveau/nvkm/subdev/bios/volt.c
index 81a47b2..70e1f9d 100644
--- a/drm/nouveau/nvkm/subdev/bios/volt.c
+++ b/drm/nouveau/nvkm/subdev/bios/volt.c
@@ -73,30 +73,34 @@ nvbios_volt_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr,
u8 *cnt, u8 *len,
 	memset(info, 0x00, sizeof(*info));
 	switch (!!volt * *ver) {
 	case 0x12:
-		info->type    = NVBIOS_VOLT_GPIO;
-		info->vidmask = nvbios_rd08(bios, volt + 0x04);
+		info->type        = NVBIOS_VOLT_GPIO;
+		info->vidmask     = nvbios_rd08(bios, volt + 0x04);
+		info->entry_based = true;
 		break;
 	case 0x20:
-		info->type    = NVBIOS_VOLT_GPIO;
-		info->vidmask = nvbios_rd08(bios, volt + 0x05);
+		info->type        = NVBIOS_VOLT_GPIO;
+		info->vidmask     = nvbios_rd08(bios, volt + 0x05);
+		info->entry_based = true;
 		break;
 	case 0x30:
-		info->type    = NVBIOS_VOLT_GPIO;
-		info->vidmask = nvbios_rd08(bios, volt + 0x04);
+		info->type        = NVBIOS_VOLT_GPIO;
+		info->vidmask     = nvbios_rd08(bios, volt + 0x04);
+		info->entry_based = true;
 		break;
 	case 0x40:
-		info->type    = NVBIOS_VOLT_GPIO;
-		info->base    = nvbios_rd32(bios, volt + 0x04);
-		info->step    = nvbios_rd16(bios, volt + 0x08);
-		info->vidmask = nvbios_rd08(bios, volt + 0x0b);
+		info->type        = NVBIOS_VOLT_GPIO;
+		info->base        = nvbios_rd32(bios, volt + 0x04);
+		info->step        = nvbios_rd16(bios, volt + 0x08);
+		info->vidmask     = nvbios_rd08(bios, volt + 0x0b);
+		info->entry_based = false; /* XXX: find the flag byte */
 		/*XXX*/
-		info->min     = 0;
-		info->max     = info->base;
+		info->min         = 0;
+		info->max         = info->base;
 		break;
 	case 0x50:
-		info->min     = nvbios_rd32(bios, volt + 0x0a);
-		info->max     = nvbios_rd32(bios, volt + 0x0e);
-		info->base    = nvbios_rd32(bios, volt + 0x12) & 0x00ffffff;
+		info->min  = nvbios_rd32(bios, volt + 0x0a);
+		info->max  = nvbios_rd32(bios, volt + 0x0e);
+		info->base = nvbios_rd32(bios, volt + 0x12) & 0x00ffffff;
 
 		/* offset 4 seems to be a flag byte */
 		if (nvbios_rd32(bios, volt + 0x4) & 1) {
@@ -104,9 +108,11 @@ nvbios_volt_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr,
u8 *cnt, u8 *len,
 			info->pwm_freq  = nvbios_rd32(bios, volt + 0x5) / 1000;
 			info->pwm_range = nvbios_rd32(bios, volt + 0x16);
 		} else {
-			info->type      = NVBIOS_VOLT_GPIO;
-			info->vidmask   = nvbios_rd08(bios, volt + 0x06);
-			info->step      = nvbios_rd16(bios, volt + 0x16);
+			info->type        = NVBIOS_VOLT_GPIO;
+			info->vidmask     = nvbios_rd08(bios, volt + 0x06);
+			info->step        = nvbios_rd16(bios, volt + 0x16);
+			info->entry_based +				!(nvbios_rd08(bios, volt + 0x4) & 0x2);
 		}
 		break;
 	}
diff --git a/drm/nouveau/nvkm/subdev/volt/base.c
b/drm/nouveau/nvkm/subdev/volt/base.c
index 50b5649..ef653b1 100644
--- a/drm/nouveau/nvkm/subdev/volt/base.c
+++ b/drm/nouveau/nvkm/subdev/volt/base.c
@@ -112,6 +112,7 @@ nvkm_volt_set_id(struct nvkm_volt *volt, u8 id, int
condition)
 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;
@@ -119,7 +120,9 @@ nvkm_volt_parse_bios(struct nvkm_bios *bios, struct
nvkm_volt *volt)
 	int i;
 
 	data = nvbios_volt_parse(bios, &ver, &hdr, &cnt, &len,
&info);
-	if (data && info.vidmask && info.base && info.step) {
+	if (data && info.vidmask && info.base && info.step
+	    && !info.entry_based) {
+		nvkm_debug(subdev, "found header based VIDs\n");
 		for (i = 0; i < info.vidmask + 1; i++) {
 			if (info.base >= info.min &&
 				info.base <= info.max) {
@@ -130,7 +133,8 @@ nvkm_volt_parse_bios(struct nvkm_bios *bios, struct
nvkm_volt *volt)
 			info.base += info.step;
 		}
 		volt->vid_mask = info.vidmask;
-	} else if (data && info.vidmask) {
+	} else if (data && info.vidmask && info.entry_based) {
+		nvkm_debug(subdev, "found entry based VIDs\n");
 		for (i = 0; i < cnt; i++) {
 			data = nvbios_volt_entry_parse(bios, i, &ver, &hdr,
 						       &ivid);
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 03/22] volt: save the voltage range we are able to set

We shouldn't set voltages below the min or above the max voltage the gpu is
able to set, so save the range

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
Tested-by: Pierre Moreau <pierre.morrow at free.fr>
---
 drm/nouveau/include/nvkm/subdev/volt.h |  3 +++
 drm/nouveau/nvkm/subdev/volt/base.c    | 14 +++++++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/drm/nouveau/include/nvkm/subdev/volt.h
b/drm/nouveau/include/nvkm/subdev/volt.h
index feff55c..b765f4f 100644
--- a/drm/nouveau/include/nvkm/subdev/volt.h
+++ b/drm/nouveau/include/nvkm/subdev/volt.h
@@ -12,6 +12,9 @@ struct nvkm_volt {
 		u32 uv;
 		u8 vid;
 	} vid[256];
+
+	u32 max_uv;
+	u32 min_uv;
 };
 
 int nvkm_volt_get(struct nvkm_volt *);
diff --git a/drm/nouveau/nvkm/subdev/volt/base.c
b/drm/nouveau/nvkm/subdev/volt/base.c
index ef653b1..95fe065 100644
--- a/drm/nouveau/nvkm/subdev/volt/base.c
+++ b/drm/nouveau/nvkm/subdev/volt/base.c
@@ -123,6 +123,8 @@ nvkm_volt_parse_bios(struct nvkm_bios *bios, struct
nvkm_volt *volt)
 	if (data && info.vidmask && info.base && info.step
 	    && !info.entry_based) {
 		nvkm_debug(subdev, "found header 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) {
@@ -135,6 +137,8 @@ nvkm_volt_parse_bios(struct nvkm_bios *bios, struct
nvkm_volt *volt)
 		volt->vid_mask = info.vidmask;
 	} else if (data && info.vidmask && info.entry_based) {
 		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);
@@ -142,9 +146,14 @@ nvkm_volt_parse_bios(struct nvkm_bios *bios, struct
nvkm_volt *volt)
 				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;
 	}
 }
 
@@ -185,8 +194,11 @@ nvkm_volt_ctor(const struct nvkm_volt_func *func, struct
nvkm_device *device,
 	volt->func = func;
 
 	/* Assuming the non-bios device should build the voltage table later */
-	if (bios)
+	if (bios) {
 		nvkm_volt_parse_bios(bios, volt);
+		nvkm_debug(&volt->subdev, "min: %iuv max: %iuv\n",
+			   volt->min_uv, volt->max_uv);
+	}
 
 	if (volt->vid_nr) {
 		for (i = 0; i < volt->vid_nr; i++) {
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 04/22] volt: add nvkm_volt_map_min function

this is a copy of nvkm_volt_map, which always returns the lowest possible
voltage for a cstate

nvkm_volt_map will get a temperature parameter there later and also fix the
voltage calculation, so that this functions will be completly different in
later commits

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
Tested-by: Pierre Moreau <pierre.morrow at free.fr>
---
 drm/nouveau/include/nvkm/subdev/volt.h |  1 +
 drm/nouveau/nvkm/subdev/volt/base.c    | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/drm/nouveau/include/nvkm/subdev/volt.h
b/drm/nouveau/include/nvkm/subdev/volt.h
index b765f4f..fc68825 100644
--- a/drm/nouveau/include/nvkm/subdev/volt.h
+++ b/drm/nouveau/include/nvkm/subdev/volt.h
@@ -17,6 +17,7 @@ struct nvkm_volt {
 	u32 min_uv;
 };
 
+int nvkm_volt_map_min(struct nvkm_volt *volt, u8 id);
 int nvkm_volt_get(struct nvkm_volt *);
 int nvkm_volt_set_id(struct nvkm_volt *, u8 id, int condition);
 
diff --git a/drm/nouveau/nvkm/subdev/volt/base.c
b/drm/nouveau/nvkm/subdev/volt/base.c
index 95fe065..71094a9 100644
--- a/drm/nouveau/nvkm/subdev/volt/base.c
+++ b/drm/nouveau/nvkm/subdev/volt/base.c
@@ -65,6 +65,28 @@ nvkm_volt_set(struct nvkm_volt *volt, u32 uv)
 	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;
+	u16 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;
+}
+
 static int
 nvkm_volt_map(struct nvkm_volt *volt, u8 id)
 {
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 05/22] clk: don't create cstates which voltage is higher than what the gpu can do

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
Tested-by: Pierre Moreau <pierre.morrow at free.fr>
---
 drm/nouveau/nvkm/subdev/clk/base.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drm/nouveau/nvkm/subdev/clk/base.c
b/drm/nouveau/nvkm/subdev/clk/base.c
index 889cce2..75122a2 100644
--- a/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drm/nouveau/nvkm/subdev/clk/base.c
@@ -138,6 +138,7 @@ static int
 nvkm_cstate_new(struct nvkm_clk *clk, int idx, struct nvkm_pstate *pstate)
 {
 	struct nvkm_bios *bios = clk->subdev.device->bios;
+	struct nvkm_volt *volt = clk->subdev.device->volt;
 	const struct nvkm_domain *domain = clk->domains;
 	struct nvkm_cstate *cstate = NULL;
 	struct nvbios_cstepX cstepX;
@@ -148,6 +149,9 @@ nvkm_cstate_new(struct nvkm_clk *clk, int idx, struct
nvkm_pstate *pstate)
 	if (!data)
 		return -ENOENT;
 
+	if (volt && nvkm_volt_map_min(volt, cstepX.voltage) >
volt->max_uv)
+		return -EINVAL;
+
 	cstate = kzalloc(sizeof(*cstate), GFP_KERNEL);
 	if (!cstate)
 		return -ENOMEM;
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 06/22] volt: parse the both max voltage entries

these entries specify a maximum voltage nvidia never exceeds, we shouldn't
do
that, too.

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 drm/nouveau/include/nvkm/subdev/bios/vmap.h |  2 ++
 drm/nouveau/include/nvkm/subdev/volt.h      |  2 ++
 drm/nouveau/nvkm/subdev/bios/vmap.c         |  5 +++++
 drm/nouveau/nvkm/subdev/volt/base.c         | 11 +++++++++++
 4 files changed, 20 insertions(+)

diff --git a/drm/nouveau/include/nvkm/subdev/bios/vmap.h
b/drm/nouveau/include/nvkm/subdev/bios/vmap.h
index 6633c6d..48fe71d 100644
--- a/drm/nouveau/include/nvkm/subdev/bios/vmap.h
+++ b/drm/nouveau/include/nvkm/subdev/bios/vmap.h
@@ -1,6 +1,8 @@
 #ifndef __NVBIOS_VMAP_H__
 #define __NVBIOS_VMAP_H__
 struct nvbios_vmap {
+	u8  max0;
+	u8  max1;
 };
 
 u16 nvbios_vmap_table(struct nvkm_bios *, u8 *ver, u8 *hdr, u8 *cnt, u8 *len);
diff --git a/drm/nouveau/include/nvkm/subdev/volt.h
b/drm/nouveau/include/nvkm/subdev/volt.h
index fc68825..3e0f8da 100644
--- a/drm/nouveau/include/nvkm/subdev/volt.h
+++ b/drm/nouveau/include/nvkm/subdev/volt.h
@@ -15,6 +15,8 @@ struct nvkm_volt {
 
 	u32 max_uv;
 	u32 min_uv;
+	u8 max0_vid;
+	u8 max1_vid;
 };
 
 int nvkm_volt_map_min(struct nvkm_volt *volt, u8 id);
diff --git a/drm/nouveau/nvkm/subdev/bios/vmap.c
b/drm/nouveau/nvkm/subdev/bios/vmap.c
index 2f13db7..f5463b1 100644
--- a/drm/nouveau/nvkm/subdev/bios/vmap.c
+++ b/drm/nouveau/nvkm/subdev/bios/vmap.c
@@ -61,7 +61,12 @@ nvbios_vmap_parse(struct nvkm_bios *bios, u8 *ver, u8 *hdr,
u8 *cnt, u8 *len,
 	memset(info, 0x00, sizeof(*info));
 	switch (!!vmap * *ver) {
 	case 0x10:
+		info->max0 = 0xff;
+		info->max1 = 0xff;
+		break;
 	case 0x20:
+		info->max0 = nvbios_rd08(bios, vmap + 0x7);
+		info->max1 = nvbios_rd08(bios, vmap + 0x8);
 		break;
 	}
 	return vmap;
diff --git a/drm/nouveau/nvkm/subdev/volt/base.c
b/drm/nouveau/nvkm/subdev/volt/base.c
index 71094a9..205dfcf 100644
--- a/drm/nouveau/nvkm/subdev/volt/base.c
+++ b/drm/nouveau/nvkm/subdev/volt/base.c
@@ -217,9 +217,20 @@ nvkm_volt_ctor(const struct nvkm_volt_func *func, struct
nvkm_device *device,
 
 	/* 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_vid = vmap.max0;
+			volt->max1_vid = vmap.max1;
+		} else {
+			volt->max0_vid = 0xff;
+			volt->max1_vid = 0xff;
+		}
 	}
 
 	if (volt->vid_nr) {
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 07/22] volt: add min_id parameter to nvkm_volt_set_id

min_id indicates a volt map entry which acts as a floor value, this will be
used to set the lower voltage limit through pstates

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 drm/nouveau/include/nvkm/subdev/volt.h | 2 +-
 drm/nouveau/nvkm/subdev/clk/base.c     | 6 ++++--
 drm/nouveau/nvkm/subdev/volt/base.c    | 5 ++++-
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drm/nouveau/include/nvkm/subdev/volt.h
b/drm/nouveau/include/nvkm/subdev/volt.h
index 3e0f8da..e966266 100644
--- a/drm/nouveau/include/nvkm/subdev/volt.h
+++ b/drm/nouveau/include/nvkm/subdev/volt.h
@@ -21,7 +21,7 @@ struct nvkm_volt {
 
 int nvkm_volt_map_min(struct nvkm_volt *volt, u8 id);
 int nvkm_volt_get(struct nvkm_volt *);
-int nvkm_volt_set_id(struct nvkm_volt *, u8 id, int condition);
+int nvkm_volt_set_id(struct nvkm_volt *, u8 id, u8 min_id, int condition);
 
 int nv40_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
 int gk104_volt_new(struct nvkm_device *, int, struct nvkm_volt **);
diff --git a/drm/nouveau/nvkm/subdev/clk/base.c
b/drm/nouveau/nvkm/subdev/clk/base.c
index 75122a2..ee193cf 100644
--- a/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drm/nouveau/nvkm/subdev/clk/base.c
@@ -99,7 +99,8 @@ nvkm_cstate_prog(struct nvkm_clk *clk, struct nvkm_pstate
*pstate, int cstatei)
 	}
 
 	if (volt) {
-		ret = nvkm_volt_set_id(volt, cstate->voltage, +1);
+		ret = nvkm_volt_set_id(volt, cstate->voltage,
+				       pstate->base.voltage, +1);
 		if (ret && ret != -ENODEV) {
 			nvkm_error(subdev, "failed to raise voltage: %d\n", ret);
 			return ret;
@@ -113,7 +114,8 @@ nvkm_cstate_prog(struct nvkm_clk *clk, struct nvkm_pstate
*pstate, int cstatei)
 	}
 
 	if (volt) {
-		ret = nvkm_volt_set_id(volt, cstate->voltage, -1);
+		ret = nvkm_volt_set_id(volt, cstate->voltage,
+				       pstate->base.voltage, -1);
 		if (ret && ret != -ENODEV)
 			nvkm_error(subdev, "failed to lower voltage: %d\n", ret);
 	}
diff --git a/drm/nouveau/nvkm/subdev/volt/base.c
b/drm/nouveau/nvkm/subdev/volt/base.c
index 205dfcf..a7f8c76 100644
--- a/drm/nouveau/nvkm/subdev/volt/base.c
+++ b/drm/nouveau/nvkm/subdev/volt/base.c
@@ -110,7 +110,7 @@ nvkm_volt_map(struct nvkm_volt *volt, u8 id)
 }
 
 int
-nvkm_volt_set_id(struct nvkm_volt *volt, u8 id, int condition)
+nvkm_volt_set_id(struct nvkm_volt *volt, u8 id, u8 min_id, int condition)
 {
 	int ret;
 
@@ -123,6 +123,9 @@ nvkm_volt_set_id(struct nvkm_volt *volt, u8 id, int
condition)
 		if (!condition || prev < 0 ||
 		    (condition < 0 && ret < prev) ||
 		    (condition > 0 && ret > prev)) {
+			int min = nvkm_volt_map(volt, min_id);
+			if (min >= 0)
+				ret = max(min, ret);
 			ret = nvkm_volt_set(volt, ret);
 		} else {
 			ret = 0;
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 08/22] clk: export nvkm_volt_map

before clocking to a cstate, we have to check if the voltage is within the
allowed range

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 drm/nouveau/include/nvkm/subdev/volt.h | 1 +
 drm/nouveau/nvkm/subdev/volt/base.c    | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drm/nouveau/include/nvkm/subdev/volt.h
b/drm/nouveau/include/nvkm/subdev/volt.h
index e966266..e8637b9 100644
--- a/drm/nouveau/include/nvkm/subdev/volt.h
+++ b/drm/nouveau/include/nvkm/subdev/volt.h
@@ -19,6 +19,7 @@ struct nvkm_volt {
 	u8 max1_vid;
 };
 
+int nvkm_volt_map(struct nvkm_volt *volt, u8 id);
 int nvkm_volt_map_min(struct nvkm_volt *volt, u8 id);
 int nvkm_volt_get(struct nvkm_volt *);
 int nvkm_volt_set_id(struct nvkm_volt *, u8 id, u8 min_id, int condition);
diff --git a/drm/nouveau/nvkm/subdev/volt/base.c
b/drm/nouveau/nvkm/subdev/volt/base.c
index a7f8c76..c4fde8f 100644
--- a/drm/nouveau/nvkm/subdev/volt/base.c
+++ b/drm/nouveau/nvkm/subdev/volt/base.c
@@ -87,7 +87,7 @@ nvkm_volt_map_min(struct nvkm_volt *volt, u8 id)
 	return id ? id * 10000 : -ENODEV;
 }
 
-static int
+int
 nvkm_volt_map(struct nvkm_volt *volt, u8 id)
 {
 	struct nvkm_bios *bios = volt->subdev.device->bios;
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 09/22] clk: add index field to nvkm_cstate

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 drm/nouveau/include/nvkm/subdev/clk.h | 1 +
 drm/nouveau/nvkm/subdev/clk/base.c    | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drm/nouveau/include/nvkm/subdev/clk.h
b/drm/nouveau/include/nvkm/subdev/clk.h
index fb54417..6226f0d 100644
--- a/drm/nouveau/include/nvkm/subdev/clk.h
+++ b/drm/nouveau/include/nvkm/subdev/clk.h
@@ -52,6 +52,7 @@ struct nvkm_cstate {
 	struct list_head head;
 	u8  voltage;
 	u32 domain[nv_clk_src_max];
+	u8  cstate;
 };
 
 struct nvkm_pstate {
diff --git a/drm/nouveau/nvkm/subdev/clk/base.c
b/drm/nouveau/nvkm/subdev/clk/base.c
index ee193cf..720434f 100644
--- a/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drm/nouveau/nvkm/subdev/clk/base.c
@@ -160,6 +160,7 @@ nvkm_cstate_new(struct nvkm_clk *clk, int idx, struct
nvkm_pstate *pstate)
 
 	*cstate = pstate->base;
 	cstate->voltage = cstepX.voltage;
+	cstate->cstate = idx;
 
 	while (domain && domain->name != nv_clk_src_max) {
 		if (domain->flags & NVKM_CLK_DOM_FLAG_CORE) {
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 10/22] add daemon to compare nouveau with blob voltage

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;
+}
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 11/22] volt: add temperature parameter to nvkm_volt_map

the voltage entries actually may map to a different voltage depending on the
current temperature.

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 bin/nv_cmp_volt.c                      |  2 +-
 drm/nouveau/include/nvkm/subdev/volt.h |  2 +-
 drm/nouveau/nvkm/subdev/volt/base.c    | 14 ++++++++++----
 3 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/bin/nv_cmp_volt.c b/bin/nv_cmp_volt.c
index 6147a7d..16aa7e6 100644
--- a/bin/nv_cmp_volt.c
+++ b/bin/nv_cmp_volt.c
@@ -108,7 +108,7 @@ main(int argc, char **argv)
 
 		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_nouveau_voltage = max(nvkm_volt_map(volt, best_cstate->voltage,
new_temp), nvkm_volt_map(volt, best_pstate->base.voltage, new_temp));
 		new_pstate = best_pstate->pstate;
 		new_cstate = best_cstate->cstate;
 
diff --git a/drm/nouveau/include/nvkm/subdev/volt.h
b/drm/nouveau/include/nvkm/subdev/volt.h
index e8637b9..3b94ab0 100644
--- a/drm/nouveau/include/nvkm/subdev/volt.h
+++ b/drm/nouveau/include/nvkm/subdev/volt.h
@@ -19,7 +19,7 @@ struct nvkm_volt {
 	u8 max1_vid;
 };
 
-int nvkm_volt_map(struct nvkm_volt *volt, u8 id);
+int nvkm_volt_map(struct nvkm_volt *volt, u8 id, u8 temperature);
 int nvkm_volt_map_min(struct nvkm_volt *volt, u8 id);
 int nvkm_volt_get(struct nvkm_volt *);
 int nvkm_volt_set_id(struct nvkm_volt *, u8 id, u8 min_id, int condition);
diff --git a/drm/nouveau/nvkm/subdev/volt/base.c
b/drm/nouveau/nvkm/subdev/volt/base.c
index c4fde8f..e741383 100644
--- a/drm/nouveau/nvkm/subdev/volt/base.c
+++ b/drm/nouveau/nvkm/subdev/volt/base.c
@@ -26,6 +26,7 @@
 #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)
@@ -88,7 +89,7 @@ nvkm_volt_map_min(struct nvkm_volt *volt, u8 id)
 }
 
 int
-nvkm_volt_map(struct nvkm_volt *volt, u8 id)
+nvkm_volt_map(struct nvkm_volt *volt, u8 id, u8 temp)
 {
 	struct nvkm_bios *bios = volt->subdev.device->bios;
 	struct nvbios_vmap_entry info;
@@ -98,7 +99,7 @@ nvkm_volt_map(struct nvkm_volt *volt, u8 id)
 	vmap = nvbios_vmap_entry_parse(bios, id, &ver, &len, &info);
 	if (vmap) {
 		if (info.link != 0xff) {
-			int ret = nvkm_volt_map(volt, info.link);
+			int ret = nvkm_volt_map(volt, info.link, temp);
 			if (ret < 0)
 				return ret;
 			info.min += ret;
@@ -112,18 +113,23 @@ nvkm_volt_map(struct nvkm_volt *volt, u8 id)
 int
 nvkm_volt_set_id(struct nvkm_volt *volt, u8 id, u8 min_id, int condition)
 {
+	struct nvkm_therm *therm = volt->subdev.device->therm;
 	int ret;
+	int temp = 0;
+
+	if (therm)
+		temp = nvkm_therm_temp_get(therm);
 
 	if (volt->func->set_id)
 		return volt->func->set_id(volt, id, condition);
 
-	ret = nvkm_volt_map(volt, id);
+	ret = nvkm_volt_map(volt, id, max(temp, 0));
 	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);
+			int min = nvkm_volt_map(volt, min_id, max(temp, 0));
 			if (min >= 0)
 				ret = max(min, ret);
 			ret = nvkm_volt_set(volt, ret);
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 12/22] clk: fixup cstate selection

now the cstatei parameter can be used of the nvkm_cstate_prog function to
select a specific cstate

-1 is a magic value, which will always select the highest currently possible
cstate

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 drm/nouveau/nvkm/subdev/clk/base.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drm/nouveau/nvkm/subdev/clk/base.c
b/drm/nouveau/nvkm/subdev/clk/base.c
index 720434f..29478c7 100644
--- a/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drm/nouveau/nvkm/subdev/clk/base.c
@@ -85,7 +85,15 @@ nvkm_cstate_prog(struct nvkm_clk *clk, struct nvkm_pstate
*pstate, int cstatei)
 	int ret;
 
 	if (!list_empty(&pstate->list)) {
-		cstate = list_entry(pstate->list.prev, typeof(*cstate), head);
+		if (cstatei == -1)
+			cstate = list_entry(pstate->list.prev, typeof(*cstate),
+					    head);
+		else {
+			list_for_each_entry(cstate, &pstate->list, head) {
+				if (cstate->cstate == cstatei)
+					break;
+			}
+		}
 	} else {
 		cstate = &pstate->base;
 	}
@@ -207,7 +215,7 @@ nvkm_pstate_prog(struct nvkm_clk *clk, int pstatei)
 		ram->func->tidy(ram);
 	}
 
-	return nvkm_cstate_prog(clk, pstate, 0);
+	return nvkm_cstate_prog(clk, pstate, -1);
 }
 
 static void
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 13/22] clk: respect voltage limits in nvkm_cstate_prog with cstate = -1

we should never allow to select a cstate which current voltage (depending on
the temperature) is higher than

1. the max volt entries in the voltage map table
2. what tha gpu actually can volt to

this resolves all remaining volting errors on fermi and newer

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 drm/nouveau/nvkm/subdev/clk/base.c | 54 ++++++++++++++++++++++++++++++++++++--
 1 file changed, 52 insertions(+), 2 deletions(-)

diff --git a/drm/nouveau/nvkm/subdev/clk/base.c
b/drm/nouveau/nvkm/subdev/clk/base.c
index 29478c7..d567f0f 100644
--- a/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drm/nouveau/nvkm/subdev/clk/base.c
@@ -74,6 +74,57 @@ nvkm_clk_adjust(struct nvkm_clk *clk, bool adjust,
 /******************************************************************************
  * C-States
  *****************************************************************************/
+static bool
+nvkm_cstate_valid(struct nvkm_clk *clk, struct nvkm_cstate *cstate, u32
max_volt, int temp)
+{
+	struct nvkm_volt *volt = clk->subdev.device->volt;
+	int voltage;
+
+	if (!volt)
+		return true;
+
+	voltage = nvkm_volt_map(volt, cstate->voltage, temp);
+	if (voltage < 0)
+		return false;
+	return voltage <= min(max_volt, volt->max_uv) &&
+	       voltage >= volt->min_uv;
+}
+
+static struct nvkm_cstate *
+nvkm_cstate_find_best(struct nvkm_clk *clk, struct nvkm_pstate *pstate)
+{
+	struct nvkm_device *device = clk->subdev.device;
+	struct nvkm_therm *therm = device->therm;
+	struct nvkm_volt *volt = device->volt;
+	struct nvkm_cstate *cstate;
+	int temp = 0, max_volt;
+
+	if (!volt)
+		return list_entry(pstate->list.prev, typeof(*cstate), head);
+
+	if (therm) {
+		/* ignore error code */
+		temp = max(0, nvkm_therm_temp_get(therm));
+	}
+
+	max_volt = volt->max_uv;
+	if (volt->max0_vid != 0xff)
+		max_volt = min(max_volt,
+			       nvkm_volt_map(volt, volt->max0_vid, temp));
+	if (volt->max1_vid != 0xff)
+		max_volt = min(max_volt,
+			       nvkm_volt_map(volt, volt->max1_vid, temp));
+
+	for (cstate = list_entry(pstate->list.prev, typeof(*cstate), head);
+	     &cstate->head != &pstate->list;
+	     cstate = list_entry(cstate->head.prev, typeof(*cstate), head)) {
+		if (nvkm_cstate_valid(clk, cstate, max_volt, temp))
+			break;
+	}
+
+	return cstate;
+}
+
 static int
 nvkm_cstate_prog(struct nvkm_clk *clk, struct nvkm_pstate *pstate, int cstatei)
 {
@@ -86,8 +137,7 @@ nvkm_cstate_prog(struct nvkm_clk *clk, struct nvkm_pstate
*pstate, int cstatei)
 
 	if (!list_empty(&pstate->list)) {
 		if (cstatei == -1)
-			cstate = list_entry(pstate->list.prev, typeof(*cstate),
-					    head);
+			cstate = nvkm_cstate_find_best(clk, pstate);
 		else {
 			list_for_each_entry(cstate, &pstate->list, head) {
 				if (cstate->cstate == cstatei)
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 14/22] bios: add parsing of BASE CLOCK table

this table contains three important clocks:

base  clock: this is the non boosted max clock
tdp   clock: the clock at wich the vbios guarentees the TDP won't ever be
             exceeded at max load (seems to be always the same as the base
             clock, but behaves differently)
boost clock: the avg clock the gpu will stay boosted to. It doesn't seem to
             affect the behaviour of the nvidia driver at all though.

v2: make clear that base/boost/tdp fields are ids

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
Reviewed-by: Martin Peres <martin.peres at free.fr>
---
 drm/nouveau/include/nvkm/subdev/bios/baseclock.h | 24 +++++++
 drm/nouveau/nvkm/subdev/bios/Kbuild              |  1 +
 drm/nouveau/nvkm/subdev/bios/baseclock.c         | 82 ++++++++++++++++++++++++
 3 files changed, 107 insertions(+)
 create mode 100644 drm/nouveau/include/nvkm/subdev/bios/baseclock.h
 create mode 100644 drm/nouveau/nvkm/subdev/bios/baseclock.c

diff --git a/drm/nouveau/include/nvkm/subdev/bios/baseclock.h
b/drm/nouveau/include/nvkm/subdev/bios/baseclock.h
new file mode 100644
index 0000000..ed6a3e6
--- /dev/null
+++ b/drm/nouveau/include/nvkm/subdev/bios/baseclock.h
@@ -0,0 +1,24 @@
+#ifndef __NVBIOS_BASECLOCK_H__
+#define __NVBIOS_BASECLOCK_H__
+struct nvbios_baseclk_header {
+	u16 offset;
+
+	u8 version;
+	u8 hlen;
+	u8 ecount;
+	u8 elen;
+	u8 scount;
+	u8 slen;
+
+	u8 base_id;
+	u8 boost_id;
+	u8 tdp_id;
+};
+struct nvbios_baseclk_entry {
+	u8  pstate;
+	u16 clock_mhz;
+};
+int nvbios_baseclock_parse(struct nvkm_bios *, struct nvbios_baseclk_header *);
+int nvbios_baseclock_entry(struct nvkm_bios *, struct nvbios_baseclk_header *,
+			   u8 idx, struct nvbios_baseclk_entry *);
+#endif
diff --git a/drm/nouveau/nvkm/subdev/bios/Kbuild
b/drm/nouveau/nvkm/subdev/bios/Kbuild
index dbcb0ef..6cb3beb 100644
--- a/drm/nouveau/nvkm/subdev/bios/Kbuild
+++ b/drm/nouveau/nvkm/subdev/bios/Kbuild
@@ -1,4 +1,5 @@
 nvkm-y += nvkm/subdev/bios/base.o
+nvkm-y += nvkm/subdev/bios/baseclock.o
 nvkm-y += nvkm/subdev/bios/bit.o
 nvkm-y += nvkm/subdev/bios/boost.o
 nvkm-y += nvkm/subdev/bios/conn.o
diff --git a/drm/nouveau/nvkm/subdev/bios/baseclock.c
b/drm/nouveau/nvkm/subdev/bios/baseclock.c
new file mode 100644
index 0000000..3c961e2
--- /dev/null
+++ b/drm/nouveau/nvkm/subdev/bios/baseclock.c
@@ -0,0 +1,82 @@
+/*
+ * 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 <subdev/bios.h>
+#include <subdev/bios/bit.h>
+#include <subdev/bios/baseclock.h>
+
+static u16
+nvbios_baseclock_offset(struct nvkm_bios *b)
+{
+	struct bit_entry bit_P;
+
+	if (!bit_entry(b, 'P', &bit_P)) {
+		if (bit_P.version == 2)
+			return nvbios_rd16(b, bit_P.offset + 0x38);
+	}
+
+	return 0x0000;
+}
+
+int
+nvbios_baseclock_parse(struct nvkm_bios *b, struct nvbios_baseclk_header *h)
+{
+	if (!h)
+		return -EINVAL;
+
+	h->offset = nvbios_baseclock_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->slen     = nvbios_rd08(b, h->offset + 0x3);
+		h->scount   = nvbios_rd08(b, h->offset + 0x4);
+		h->ecount   = nvbios_rd08(b, h->offset + 0x5);
+
+		h->base_id  = nvbios_rd08(b, h->offset + 0x0f);
+		h->boost_id = nvbios_rd08(b, h->offset + 0x10);
+		h->tdp_id   = nvbios_rd08(b, h->offset + 0x11);
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
+int
+nvbios_baseclock_entry(struct nvkm_bios *b, struct nvbios_baseclk_header *h,
+		       u8 idx, struct nvbios_baseclk_entry *e)
+{
+	u16 offset;
+
+	if (!e || !h || idx > h->ecount)
+		return -EINVAL;
+
+	offset = h->offset + h->hlen + idx * (h->elen + (h->slen *
h->scount));
+	e->pstate    = nvbios_rd08(b, offset);
+	e->clock_mhz = nvbios_rd16(b, offset + 0x5);
+	return 0;
+}
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 15/22] clk: allow boosting only when NvBoost is set

0: base clock from the vbios is max clock
1: boost only to boost clock from the vbios (default)
2: boost to max clock available

v2: moved into nvkm_cstate_valid

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
Reviewed-by: Martin Peres <martin.peres at free.fr>
---
 drm/nouveau/include/nvkm/subdev/clk.h |  9 ++++++++-
 drm/nouveau/nvkm/subdev/clk/base.c    | 33 ++++++++++++++++++++++++++++++++-
 drm/nouveau/nvkm/subdev/clk/gf100.c   |  2 +-
 drm/nouveau/nvkm/subdev/clk/gk104.c   |  2 +-
 4 files changed, 42 insertions(+), 4 deletions(-)

diff --git a/drm/nouveau/include/nvkm/subdev/clk.h
b/drm/nouveau/include/nvkm/subdev/clk.h
index 6226f0d..99ee05c 100644
--- a/drm/nouveau/include/nvkm/subdev/clk.h
+++ b/drm/nouveau/include/nvkm/subdev/clk.h
@@ -68,7 +68,8 @@ struct nvkm_pstate {
 struct nvkm_domain {
 	enum nv_clk_src name;
 	u8 bios; /* 0xff for none */
-#define NVKM_CLK_DOM_FLAG_CORE 0x01
+#define NVKM_CLK_DOM_FLAG_CORE    0x01
+#define NVKM_CLK_DOM_FLAG_BASECLK 0x02
 	u8 flags;
 	const char *mname;
 	int mdiv;
@@ -98,6 +99,12 @@ struct nvkm_clk {
 	int dstate; /* display adjustment (min+) */
 
 	bool allow_reclock;
+#define NVKM_CLK_BOOST_NONE 0x0
+#define NVKM_CLK_BOOST_AVG  0x1
+#define NVKM_CLK_BOOST_FULL 0x2
+	u8  boost_mode;
+	u32 base_khz;
+	u32 boost_khz;
 
 	/*XXX: die, these are here *only* to support the completely
 	 *     bat-shit insane what-was-nouveau_hw.c code
diff --git a/drm/nouveau/nvkm/subdev/clk/base.c
b/drm/nouveau/nvkm/subdev/clk/base.c
index d567f0f..b057ed3 100644
--- a/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drm/nouveau/nvkm/subdev/clk/base.c
@@ -24,6 +24,7 @@
 #include "priv.h"
 
 #include <subdev/bios.h>
+#include <subdev/bios/baseclock.h>
 #include <subdev/bios/boost.h>
 #include <subdev/bios/cstep.h>
 #include <subdev/bios/perf.h>
@@ -77,9 +78,25 @@ nvkm_clk_adjust(struct nvkm_clk *clk, bool adjust,
 static bool
 nvkm_cstate_valid(struct nvkm_clk *clk, struct nvkm_cstate *cstate, u32
max_volt, int temp)
 {
+	const struct nvkm_domain *domain = clk->domains;
 	struct nvkm_volt *volt = clk->subdev.device->volt;
 	int voltage;
 
+	while (domain && domain->name != nv_clk_src_max) {
+		if (domain->flags & NVKM_CLK_DOM_FLAG_BASECLK) {
+			u32 freq = cstate->domain[domain->name];
+			switch (clk->boost_mode) {
+			case NVKM_CLK_BOOST_NONE:
+				if (freq > clk->base_khz)
+					return false;
+			case NVKM_CLK_BOOST_AVG:
+				if (freq > clk->boost_khz)
+					return false;
+			}
+		}
+		domain++;
+	}
+
 	if (!volt)
 		return true;
 
@@ -626,10 +643,24 @@ int
 nvkm_clk_ctor(const struct nvkm_clk_func *func, struct nvkm_device *device,
 	      int index, bool allow_reclock, struct nvkm_clk *clk)
 {
+	struct nvkm_subdev *subdev = &clk->subdev;
+	struct nvkm_bios *bios = device->bios;
 	int ret, idx, arglen;
 	const char *mode;
+	struct nvbios_baseclk_header h;
+
+	nvkm_subdev_ctor(&nvkm_clk, device, index, 0, subdev);
+
+	clk->boost_mode = nvkm_longopt(device->cfgopt, "NvBoost",
+				       NVKM_CLK_BOOST_AVG);
+	if (bios && !nvbios_baseclock_parse(bios, &h)) {
+		struct nvbios_baseclk_entry base, boost;
+		if (!nvbios_baseclock_entry(bios, &h, h.boost_id, &boost))
+			clk->boost_khz = boost.clock_mhz * 1000;
+		if (!nvbios_baseclock_entry(bios, &h, h.base_id, &base))
+			clk->base_khz = base.clock_mhz * 1000;
+	}
 
-	nvkm_subdev_ctor(&nvkm_clk, device, index, 0, &clk->subdev);
 	clk->func = func;
 	INIT_LIST_HEAD(&clk->states);
 	clk->domains = func->domains;
diff --git a/drm/nouveau/nvkm/subdev/clk/gf100.c
b/drm/nouveau/nvkm/subdev/clk/gf100.c
index 78c449b..71b7c9f 100644
--- a/drm/nouveau/nvkm/subdev/clk/gf100.c
+++ b/drm/nouveau/nvkm/subdev/clk/gf100.c
@@ -443,7 +443,7 @@ gf100_clk = {
 		{ nv_clk_src_hubk06 , 0x00 },
 		{ nv_clk_src_hubk01 , 0x01 },
 		{ nv_clk_src_copy   , 0x02 },
-		{ nv_clk_src_gpc    , 0x03, 0, "core", 2000 },
+		{ nv_clk_src_gpc    , 0x03, NVKM_CLK_DOM_FLAG_BASECLK, "core", 2000
},
 		{ nv_clk_src_rop    , 0x04 },
 		{ nv_clk_src_mem    , 0x05, 0, "memory", 1000 },
 		{ nv_clk_src_vdec   , 0x06 },
diff --git a/drm/nouveau/nvkm/subdev/clk/gk104.c
b/drm/nouveau/nvkm/subdev/clk/gk104.c
index 975c401..639234f 100644
--- a/drm/nouveau/nvkm/subdev/clk/gk104.c
+++ b/drm/nouveau/nvkm/subdev/clk/gk104.c
@@ -485,7 +485,7 @@ gk104_clk = {
 	.domains = {
 		{ nv_clk_src_crystal, 0xff },
 		{ nv_clk_src_href   , 0xff },
-		{ nv_clk_src_gpc    , 0x00, NVKM_CLK_DOM_FLAG_CORE, "core", 2000 },
+		{ nv_clk_src_gpc    , 0x00, NVKM_CLK_DOM_FLAG_CORE |
NVKM_CLK_DOM_FLAG_BASECLK, "core", 2000 },
 		{ nv_clk_src_hubk07 , 0x01, NVKM_CLK_DOM_FLAG_CORE },
 		{ nv_clk_src_rop    , 0x02, NVKM_CLK_DOM_FLAG_CORE },
 		{ nv_clk_src_mem    , 0x03, 0, "memory", 500 },
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 16/22] volt: don't require perfect fit

if we calculate the voltage in the table right, we get all kinds of values,
which never fit the hardware steps, so we use the closest higher value the
hardware can do

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 drm/nouveau/nvkm/subdev/volt/base.c | 25 ++++++++++++++++++++++---
 1 file changed, 22 insertions(+), 3 deletions(-)

diff --git a/drm/nouveau/nvkm/subdev/volt/base.c
b/drm/nouveau/nvkm/subdev/volt/base.c
index e741383..58738e3 100644
--- a/drm/nouveau/nvkm/subdev/volt/base.c
+++ b/drm/nouveau/nvkm/subdev/volt/base.c
@@ -51,18 +51,37 @@ static int
 nvkm_volt_set(struct nvkm_volt *volt, u32 uv)
 {
 	struct nvkm_subdev *subdev = &volt->subdev;
-	int i, ret = -EINVAL;
+	int i, ret = -EINVAL, err, best = -1;
 
 	if (volt->func->volt_set)
 		return volt->func->volt_set(volt, uv);
 
 	for (i = 0; i < volt->vid_nr; i++) {
-		if (volt->vid[i].uv == uv) {
-			ret = volt->func->vid_set(volt, volt->vid[i].vid);
+		if (i == 0) {
+			best = 0;
+			err = volt->vid[i].uv - uv;
+		} else {
+			int new_err = volt->vid[i].uv - uv;
+			if (abs(new_err) < abs(err)
+			    || (err < 0 && new_err >= 0)) {
+				best = i;
+				err = new_err;
+			}
+		}
+
+		if (err == 0) {
+			ret = volt->func->vid_set(volt, volt->vid[best].vid);
 			nvkm_debug(subdev, "set %duv: %d\n", uv, ret);
 			break;
 		}
 	}
+
+	if (best != -1) {
+		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;
 }
 
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 17/22] bios/vmap: unk0 field is the mode

this selects which formula is used to calculate the voltage

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 drm/nouveau/include/nvkm/subdev/bios/vmap.h | 2 +-
 drm/nouveau/nvkm/subdev/bios/vmap.c         | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drm/nouveau/include/nvkm/subdev/bios/vmap.h
b/drm/nouveau/include/nvkm/subdev/bios/vmap.h
index 48fe71d..c036315 100644
--- a/drm/nouveau/include/nvkm/subdev/bios/vmap.h
+++ b/drm/nouveau/include/nvkm/subdev/bios/vmap.h
@@ -10,7 +10,7 @@ u16 nvbios_vmap_parse(struct nvkm_bios *, u8 *ver, u8 *hdr, u8
*cnt, u8 *len,
 		      struct nvbios_vmap *);
 
 struct nvbios_vmap_entry {
-	u8  unk0;
+	u8  mode;
 	u8  link;
 	u32 min;
 	u32 max;
diff --git a/drm/nouveau/nvkm/subdev/bios/vmap.c
b/drm/nouveau/nvkm/subdev/bios/vmap.c
index f5463b1..159c456 100644
--- a/drm/nouveau/nvkm/subdev/bios/vmap.c
+++ b/drm/nouveau/nvkm/subdev/bios/vmap.c
@@ -100,7 +100,7 @@ nvbios_vmap_entry_parse(struct nvkm_bios *bios, int idx, u8
*ver, u8 *len,
 		info->arg[2] = nvbios_rd32(bios, vmap + 0x10);
 		break;
 	case 0x20:
-		info->unk0   = nvbios_rd08(bios, vmap + 0x00);
+		info->mode   = nvbios_rd08(bios, vmap + 0x00);
 		info->link   = nvbios_rd08(bios, vmap + 0x01);
 		info->min    = nvbios_rd32(bios, vmap + 0x02);
 		info->max    = nvbios_rd32(bios, vmap + 0x06);
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 18/22] volt: add coefficients I found on my gpu

I am sure that those are a bit different on other GPUs, but while testing
the error range compared to nvidia was around 100%+-3%.

Without this change we are most of the time around 10% below nvidias voltage,
so this change causes no harm and improves the situation a lot already.

The remaining task for this is to figure out which of these constants are
chip specific and from where to get the chip specific factors

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 drm/nouveau/nvkm/subdev/volt/base.c | 54 ++++++++++++++++++++++++++++++++-----
 1 file changed, 48 insertions(+), 6 deletions(-)

diff --git a/drm/nouveau/nvkm/subdev/volt/base.c
b/drm/nouveau/nvkm/subdev/volt/base.c
index 58738e3..2b3f460 100644
--- a/drm/nouveau/nvkm/subdev/volt/base.c
+++ b/drm/nouveau/nvkm/subdev/volt/base.c
@@ -117,13 +117,55 @@ nvkm_volt_map(struct nvkm_volt *volt, u8 id, u8 temp)
 
 	vmap = nvbios_vmap_entry_parse(bios, id, &ver, &len, &info);
 	if (vmap) {
-		if (info.link != 0xff) {
-			int ret = nvkm_volt_map(volt, info.link, temp);
-			if (ret < 0)
-				return ret;
-			info.min += ret;
+		switch (ver) {
+		case 0x10:
+			if (info.link != 0xff) {
+				int ret = nvkm_volt_map(volt, info.link, temp);
+				if (ret < 0)
+					return ret;
+				info.min += ret;
+			}
+			return info.min;
+		case 0x20: {
+			s32 result;
+			u16 temp = 40;
+			switch (info.mode) {
+			case 0x0:
+				result =  info.arg[0] / 10;
+				result += info.arg[1] * 168;
+				result += info.arg[2] * 28;
+				break;
+			case 0x1:
+				result =  (info.arg[0] / 1675) * 100;
+				result += info.arg[1]          * 100;
+				result += (info.arg[2] / 10)   * 153 * temp;
+				result += info.arg[3]          * 100 * temp;
+				result += info.arg[4]          * 41;
+				result += (info.arg[5] * (temp * temp)) / 15;
+				break;
+			case 0x3:
+				result = (info.min + info.max) / 2;
+				break;
+			case 0x2:
+			default:
+				result = info.min;
+				break;
+			}
+			result = min(max(result, (s32)info.min),
+				     (s32)info.max);
+
+			if (info.link != 0xff) {
+				int ret = nvkm_volt_map(volt, info.link, temp);
+				if (ret < 0)
+					return ret;
+				result += ret;
+			}
+
+			return result;
+		}
+		default:
+			return -ENODEV;
 		}
-		return info.min;
 	}
 
 	return id ? id * 10000 : -ENODEV;
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 19/22] clk: save the max clock we can set

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 drm/nouveau/include/nvkm/subdev/clk.h | 1 +
 drm/nouveau/nvkm/subdev/clk/base.c    | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/drm/nouveau/include/nvkm/subdev/clk.h
b/drm/nouveau/include/nvkm/subdev/clk.h
index 99ee05c..61d99fd 100644
--- a/drm/nouveau/include/nvkm/subdev/clk.h
+++ b/drm/nouveau/include/nvkm/subdev/clk.h
@@ -105,6 +105,7 @@ struct nvkm_clk {
 	u8  boost_mode;
 	u32 base_khz;
 	u32 boost_khz;
+	u32 max_khz;
 
 	/*XXX: die, these are here *only* to support the completely
 	 *     bat-shit insane what-was-nouveau_hw.c code
diff --git a/drm/nouveau/nvkm/subdev/clk/base.c
b/drm/nouveau/nvkm/subdev/clk/base.c
index b057ed3..2d16e9c 100644
--- a/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drm/nouveau/nvkm/subdev/clk/base.c
@@ -242,6 +242,8 @@ nvkm_cstate_new(struct nvkm_clk *clk, int idx, struct
nvkm_pstate *pstate)
 			u32 freq = nvkm_clk_adjust(clk, true, pstate->pstate,
 						   domain->bios, cstepX.freq);
 			cstate->domain[domain->name] = freq;
+			if (domain->flags & NVKM_CLK_DOM_FLAG_BASECLK)
+				clk->max_khz = max(clk->max_khz, freq);
 		}
 		domain++;
 	}
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 20/22] clk: add nvkm_clk_reclock function

this function just forces a reclock. This makes sense if some cstates get
(un)available and we have to adjust to that.

This can happen for various reasons:
 * temperature changes
 * user changes boost mode

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 drm/nouveau/include/nvkm/subdev/clk.h |  1 +
 drm/nouveau/nvkm/subdev/clk/base.c    | 23 ++++++++++++++++-------
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/drm/nouveau/include/nvkm/subdev/clk.h
b/drm/nouveau/include/nvkm/subdev/clk.h
index 61d99fd..de164a3 100644
--- a/drm/nouveau/include/nvkm/subdev/clk.h
+++ b/drm/nouveau/include/nvkm/subdev/clk.h
@@ -120,6 +120,7 @@ int nvkm_clk_ustate(struct nvkm_clk *, int req, int pwr);
 int nvkm_clk_astate(struct nvkm_clk *, int req, int rel, bool wait);
 int nvkm_clk_dstate(struct nvkm_clk *, int req, int rel);
 int nvkm_clk_tstate(struct nvkm_clk *, int req, int rel);
+int nvkm_clk_reclock(struct nvkm_clk *);
 
 int nv04_clk_new(struct nvkm_device *, int, struct nvkm_clk **);
 int nv40_clk_new(struct nvkm_device *, int, struct nvkm_clk **);
diff --git a/drm/nouveau/nvkm/subdev/clk/base.c
b/drm/nouveau/nvkm/subdev/clk/base.c
index 2d16e9c..7a8451e 100644
--- a/drm/nouveau/nvkm/subdev/clk/base.c
+++ b/drm/nouveau/nvkm/subdev/clk/base.c
@@ -264,6 +264,9 @@ nvkm_pstate_prog(struct nvkm_clk *clk, int pstatei)
 	struct nvkm_pstate *pstate;
 	int ret, idx = 0;
 
+	if (pstatei == -1)
+		return 0;
+
 	list_for_each_entry(pstate, &clk->states, head) {
 		if (idx++ == pstatei)
 			break;
@@ -292,7 +295,7 @@ nvkm_pstate_work(struct work_struct *work)
 {
 	struct nvkm_clk *clk = container_of(work, typeof(*clk), work);
 	struct nvkm_subdev *subdev = &clk->subdev;
-	int pstate;
+	int pstate, ret;
 
 	if (!atomic_xchg(&clk->waiting, 0))
 		return;
@@ -312,12 +315,10 @@ nvkm_pstate_work(struct work_struct *work)
 	}
 
 	nvkm_trace(subdev, "-> %d\n", pstate);
-	if (pstate != clk->pstate) {
-		int ret = nvkm_pstate_prog(clk, pstate);
-		if (ret) {
-			nvkm_error(subdev, "error setting pstate %d: %d\n",
-				   pstate, ret);
-		}
+	ret = nvkm_pstate_prog(clk, pstate);
+	if (ret) {
+		nvkm_error(subdev, "error setting pstate %d: %d\n",
+			   pstate, ret);
 	}
 
 	wake_up_all(&clk->wait);
@@ -560,6 +561,14 @@ nvkm_clk_pwrsrc(struct nvkm_notify *notify)
 	return NVKM_NOTIFY_DROP;
 }
 
+int
+nvkm_clk_reclock(struct nvkm_clk *clk)
+{
+	if (clk->allow_reclock)
+		return nvkm_pstate_calc(clk, true);
+	return -ENODEV;
+}
+
 /******************************************************************************
  * subdev base class implementation
  *****************************************************************************/
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 21/22] nvif: add boost info and set operations

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 drm/nouveau/include/nvif/if0001.h     | 15 +++++++++
 drm/nouveau/nvkm/engine/device/ctrl.c | 59 +++++++++++++++++++++++++++++++++++
 2 files changed, 74 insertions(+)

diff --git a/drm/nouveau/include/nvif/if0001.h
b/drm/nouveau/include/nvif/if0001.h
index bd5b641..e4acd19 100644
--- a/drm/nouveau/include/nvif/if0001.h
+++ b/drm/nouveau/include/nvif/if0001.h
@@ -4,6 +4,8 @@
 #define NVIF_CONTROL_PSTATE_INFO                                           0x00
 #define NVIF_CONTROL_PSTATE_ATTR                                           0x01
 #define NVIF_CONTROL_PSTATE_USER                                           0x02
+#define NVIF_CONTROL_BOOST_INFO                                            0x03
+#define NVIF_CONTROL_BOOST_SET                                             0x04
 
 struct nvif_control_pstate_info_v0 {
 	__u8  version;
@@ -43,4 +45,17 @@ struct nvif_control_pstate_user_v0 {
 	__s8  pwrsrc; /*  in: target power source */
 	__u8  pad03[5];
 };
+
+struct nvif_control_boost_info_v0 {
+	__u8  version;
+	__u8  mode;
+	__u16 base_mhz;
+	__u16 boost_mhz;
+	__u16 max_mhz;
+};
+
+struct nvif_control_boost_set_v0 {
+	__u8  version;
+	__u8  mode;
+};
 #endif
diff --git a/drm/nouveau/nvkm/engine/device/ctrl.c
b/drm/nouveau/nvkm/engine/device/ctrl.c
index b0ece71..147d5f1 100644
--- a/drm/nouveau/nvkm/engine/device/ctrl.c
+++ b/drm/nouveau/nvkm/engine/device/ctrl.c
@@ -167,6 +167,61 @@ nvkm_control_mthd_pstate_user(struct nvkm_control *ctrl,
void *data, u32 size)
 }
 
 static int
+nvkm_control_mthd_boost_info(struct nvkm_control *ctrl, void *data, u32 size)
+{
+	union {
+		struct nvif_control_boost_info_v0 v0;
+	} *args = data;
+	struct nvkm_clk *clk = ctrl->device->clk;
+	int ret = -ENOSYS;
+
+	nvif_ioctl(&ctrl->object, "control boost info size %d\n",
size);
+	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false)))
{
+		nvif_ioctl(&ctrl->object, "control boost info vers %d\n",
+			   args->v0.version);
+	} else
+		return ret;
+
+	if (!clk)
+		return -ENODEV;
+
+	args->v0.mode = clk->boost_mode;
+	args->v0.base_mhz = clk->base_khz / 2000;
+	args->v0.boost_mhz = clk->boost_khz / 2000;
+	args->v0.max_mhz = clk->max_khz / 2000;
+	return 0;
+}
+
+static int
+nvkm_control_mthd_boost_set(struct nvkm_control *ctrl, void *data, u32 size)
+{
+	union {
+		struct nvif_control_boost_set_v0 v0;
+	} *args = data;
+	struct nvkm_clk *clk = ctrl->device->clk;
+	int ret = -ENOSYS;
+
+	nvif_ioctl(&ctrl->object, "control boost set size %d\n",
size);
+	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false)))
{
+		nvif_ioctl(&ctrl->object, "control boost set vers %d\n",
+			   args->v0.version);
+	} else
+		return ret;
+
+	if (!clk)
+		return -ENODEV;
+
+	if (args->v0.mode > 2)
+		return -EINVAL;
+	clk->boost_mode = args->v0.mode;
+
+	if (clk->allow_reclock)
+		nvkm_clk_reclock(clk);
+
+	return 0;
+}
+
+static int
 nvkm_control_mthd(struct nvkm_object *object, u32 mthd, void *data, u32 size)
 {
 	struct nvkm_control *ctrl = nvkm_control(object);
@@ -177,6 +232,10 @@ nvkm_control_mthd(struct nvkm_object *object, u32 mthd,
void *data, u32 size)
 		return nvkm_control_mthd_pstate_attr(ctrl, data, size);
 	case NVIF_CONTROL_PSTATE_USER:
 		return nvkm_control_mthd_pstate_user(ctrl, data, size);
+	case NVIF_CONTROL_BOOST_INFO:
+		return nvkm_control_mthd_boost_info(ctrl, data, size);
+	case NVIF_CONTROL_BOOST_SET:
+		return nvkm_control_mthd_boost_set(ctrl, data, size);
 	default:
 		break;
 	}
-- 
2.7.4

Karol Herbst

2016-Mar-21 16:16 UTC

head link

[Nouveau] [PATCH v2 22/22] debugfs: add boost interface to change the boost_mode

Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
---
 drm/nouveau/nouveau_debugfs.c | 76 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)

diff --git a/drm/nouveau/nouveau_debugfs.c b/drm/nouveau/nouveau_debugfs.c
index 3d0dc19..31b309f 100644
--- a/drm/nouveau/nouveau_debugfs.c
+++ b/drm/nouveau/nouveau_debugfs.c
@@ -180,6 +180,81 @@ static const struct file_operations nouveau_pstate_fops = {
 	.write = nouveau_debugfs_pstate_set,
 };
 
+static void
+nouveau_debugfs_boost_get_entry(struct seq_file *m, u8 mode, u8 entry, u16
value)
+{
+	if (value) {
+		if (mode == entry)
+			seq_printf(m, "*%i", entry);
+		else
+			seq_printf(m, " %i", entry);
+		seq_printf(m, ": %u MHz\n", value);
+	}
+}
+
+static int
+nouveau_debugfs_boost_get(struct seq_file *m, void *data)
+{
+	struct drm_info_node *node = (struct drm_info_node *) m->private;
+	struct nouveau_debugfs *debugfs = nouveau_debugfs(node->minor->dev);
+	struct nvif_object *ctrl = &debugfs->ctrl;
+	struct nvif_control_boost_info_v0 info = {};
+	int ret;
+
+	ret = nvif_mthd(ctrl, NVIF_CONTROL_BOOST_INFO, &info, sizeof(info));
+	if (ret)
+		return ret;
+
+	nouveau_debugfs_boost_get_entry(m, info.mode, 0, info.base_mhz);
+	nouveau_debugfs_boost_get_entry(m, info.mode, 1, info.boost_mhz);
+	nouveau_debugfs_boost_get_entry(m, info.mode, 2, info.max_mhz);
+	return 0;
+}
+
+static ssize_t
+nouveau_debugfs_boost_set(struct file *file, const char __user *ubuf,
+			  size_t len, loff_t *offp)
+{
+	struct seq_file *m = file->private_data;
+	struct drm_info_node *node = (struct drm_info_node *) m->private;
+	struct nouveau_debugfs *debugfs = nouveau_debugfs(node->minor->dev);
+	struct nvif_object *ctrl = &debugfs->ctrl;
+	struct nvif_control_boost_set_v0 args = {};
+	char buf[3] = {};
+	int ret;
+	u8 value;
+
+	if (len >= sizeof(buf))
+		return -EINVAL;
+
+	if (copy_from_user(buf, ubuf, len))
+		return -EFAULT;
+
+	ret = kstrtou8(buf, 10, &value);
+	if (ret)
+		return ret;
+
+	args.mode = value;
+	ret = nvif_mthd(ctrl, NVIF_CONTROL_BOOST_SET, &args, sizeof(args));
+	if (ret)
+		return ret;
+
+	return len;
+}
+
+static int
+nouveau_debugfs_boost_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, nouveau_debugfs_boost_get, inode->i_private);
+}
+
+static const struct file_operations nouveau_boost_fops = {
+	.owner = THIS_MODULE,
+	.open = nouveau_debugfs_boost_open,
+	.read = seq_read,
+	.write = nouveau_debugfs_boost_set,
+};
+
 static struct drm_info_list nouveau_debugfs_list[] = {
 	{ "vbios.rom", nouveau_debugfs_vbios_image, 0, NULL },
 };
@@ -189,6 +264,7 @@ static const struct nouveau_debugfs_files {
 	const char *name;
 	const struct file_operations *fops;
 } nouveau_debugfs_files[] = {
+	{"boost", &nouveau_boost_fops},
 	{"pstate", &nouveau_pstate_fops},
 };
 
-- 
2.7.4

Martin Peres

2016-Mar-28 20:49 UTC

head link

[Nouveau] [PATCH v2 06/22] volt: parse the both max voltage entries

On 21/03/16 18:16, Karol Herbst wrote:> these entries specify a maximum voltage nvidia never exceeds, we
shouldn't do
> that, too.
>
> Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
> ---
>   drm/nouveau/include/nvkm/subdev/bios/vmap.h |  2 ++
>   drm/nouveau/include/nvkm/subdev/volt.h      |  2 ++
>   drm/nouveau/nvkm/subdev/bios/vmap.c         |  5 +++++
>   drm/nouveau/nvkm/subdev/volt/base.c         | 11 +++++++++++
>   4 files changed, 20 insertions(+)
>
> diff --git a/drm/nouveau/include/nvkm/subdev/bios/vmap.h
b/drm/nouveau/include/nvkm/subdev/bios/vmap.h
> index 6633c6d..48fe71d 100644
> --- a/drm/nouveau/include/nvkm/subdev/bios/vmap.h
> +++ b/drm/nouveau/include/nvkm/subdev/bios/vmap.h
> @@ -1,6 +1,8 @@
>   #ifndef __NVBIOS_VMAP_H__
>   #define __NVBIOS_VMAP_H__
>   struct nvbios_vmap {
> +	u8  max0;
> +	u8  max1;
>   };
>   
>   u16 nvbios_vmap_table(struct nvkm_bios *, u8 *ver, u8 *hdr, u8 *cnt, u8
*len);
> diff --git a/drm/nouveau/include/nvkm/subdev/volt.h
b/drm/nouveau/include/nvkm/subdev/volt.h
> index fc68825..3e0f8da 100644
> --- a/drm/nouveau/include/nvkm/subdev/volt.h
> +++ b/drm/nouveau/include/nvkm/subdev/volt.h
> @@ -15,6 +15,8 @@ struct nvkm_volt {
>   
>   	u32 max_uv;
>   	u32 min_uv;
> +	u8 max0_vid;
> +	u8 max1_vid;
>   };
>   
>   int nvkm_volt_map_min(struct nvkm_volt *volt, u8 id);
> diff --git a/drm/nouveau/nvkm/subdev/bios/vmap.c
b/drm/nouveau/nvkm/subdev/bios/vmap.c
> index 2f13db7..f5463b1 100644
> --- a/drm/nouveau/nvkm/subdev/bios/vmap.c
> +++ b/drm/nouveau/nvkm/subdev/bios/vmap.c
> @@ -61,7 +61,12 @@ nvbios_vmap_parse(struct nvkm_bios *bios, u8 *ver, u8
*hdr, u8 *cnt, u8 *len,
>   	memset(info, 0x00, sizeof(*info));
>   	switch (!!vmap * *ver) {
>   	case 0x10:
> +		info->max0 = 0xff;
> +		info->max1 = 0xff;
> +		break;
>   	case 0x20:
> +		info->max0 = nvbios_rd08(bios, vmap + 0x7);
> +		info->max1 = nvbios_rd08(bios, vmap + 0x8);
>   		break;
>   	}
>   	return vmap;
> diff --git a/drm/nouveau/nvkm/subdev/volt/base.c
b/drm/nouveau/nvkm/subdev/volt/base.c
> index 71094a9..205dfcf 100644
> --- a/drm/nouveau/nvkm/subdev/volt/base.c
> +++ b/drm/nouveau/nvkm/subdev/volt/base.c
> @@ -217,9 +217,20 @@ nvkm_volt_ctor(const struct nvkm_volt_func *func,
struct nvkm_device *device,
>   
>   	/* 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_vid = vmap.max0;
> +			volt->max1_vid = vmap.max1;
> +		} else {
> +			volt->max0_vid = 0xff;
> +			volt->max1_vid = 0xff;
> +		}
>   	}
>   
>   	if (volt->vid_nr) {
This is really peculiar that NVIDIA would have 2 max_vid in the same 
entry :s

How did you reverse that? Did you really see no differences? Maybe the 
two max_vid are for different temperatures?

Martin Peres

2016-Mar-28 20:52 UTC

head link

[Nouveau] [PATCH v2 07/22] volt: add min_id parameter to nvkm_volt_set_id

On 21/03/16 18:16, Karol Herbst wrote:> min_id indicates a volt map entry which acts as a floor value, this will be
> used to set the lower voltage limit through pstates
>
> Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
Do we really want to push reclocking logic to the volt subsystem?

To me, volt should just allow you to read back and set a voltage. All 
the rest of the logic should be in clk.

Since this is my first NAK, here are my R-b for 3, 4 and 5:

Reviewed-by: Martin Peres <martin.peres at free.fr>

Martin Peres

2016-Mar-28 22:17 UTC

head link

[Nouveau] [PATCH v2 22/22] debugfs: add boost interface to change the boost_mode

On 21/03/16 18:16, Karol Herbst wrote:> Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
21-22 are:

Reviewed-by: Martin Peres <martin.peres at free.fr>

Martin Peres

2016-Mar-28 22:34 UTC

head link

[Nouveau] [PATCH v2 20/22] clk: add nvkm_clk_reclock function

On 21/03/16 18:16, Karol Herbst wrote:> this function just forces a reclock. This makes sense if some cstates get
(un)available and we have to adjust to that.
>
> This can happen for various reasons:
>   * temperature changes
>   * user changes boost mode
>
> Signed-off-by: Karol Herbst <nouveau at karolherbst.de>You can also add one event:
  * The load changes

In the end, the dyn. reclocking will generate a target pstate/cstate 
which will be applied as well as possible. With this in mind, we could 
rename this function nvkm_clk_update(<no param>). Reclock is a weird 
name, but so is update.

Pick whatever you want!

Martin Peres

2016-Mar-28 22:38 UTC

head link

[Nouveau] [PATCH v2 18/22] volt: add coefficients I found on my gpu

On 21/03/16 18:16, Karol Herbst wrote:> I am sure that those are a bit different on other GPUs, but while testing
> the error range compared to nvidia was around 100%+-3%.
>
> Without this change we are most of the time around 10% below nvidias
voltage,
> so this change causes no harm and improves the situation a lot already.
>
> The remaining task for this is to figure out which of these constants are
> chip specific and from where to get the chip specific factors
>
> Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
Instead of landing these coefficients like that, I would really like if 
you could dump pfuse and check if you find these coefficients there. 
What could be done also is to re-do the work you did to find out those 
coefficients on a GPU where your coefficients are not really good and 
find out what values would have needed and then compare pfuse with the 
original card.

If this is to be considered a long task, then I am OK landing those 
coefficients, but I would really appreciate if you could at least have a 
quick look at pfuse :)

Martin Peres

2016-Mar-28 22:55 UTC

head link

[Nouveau] [PATCH v2 16/22] volt: don't require perfect fit

On 21/03/16 18:16, Karol Herbst wrote:> if we calculate the voltage in the table right, we get all kinds of values,
> which never fit the hardware steps, so we use the closest higher value the
> hardware can do
This is indeed the goal.
>
> Signed-off-by: Karol Herbst <nouveau at karolherbst.de>
> ---
>   drm/nouveau/nvkm/subdev/volt/base.c | 25 ++++++++++++++++++++++---
>   1 file changed, 22 insertions(+), 3 deletions(-)
>
> diff --git a/drm/nouveau/nvkm/subdev/volt/base.c
b/drm/nouveau/nvkm/subdev/volt/base.c
> index e741383..58738e3 100644
> --- a/drm/nouveau/nvkm/subdev/volt/base.c
> +++ b/drm/nouveau/nvkm/subdev/volt/base.c
> @@ -51,18 +51,37 @@ static int
>   nvkm_volt_set(struct nvkm_volt *volt, u32 uv)
>   {
>   	struct nvkm_subdev *subdev = &volt->subdev;
> -	int i, ret = -EINVAL;
> +	int i, ret = -EINVAL, err, best = -1;
>   
>   	if (volt->func->volt_set)
>   		return volt->func->volt_set(volt, uv);
>   
>   	for (i = 0; i < volt->vid_nr; i++) {
> -		if (volt->vid[i].uv == uv) {
> -			ret = volt->func->vid_set(volt, volt->vid[i].vid);
> +		if (i == 0) {
> +			best = 0;
> +			err = volt->vid[i].uv - uv;
> +		} else {
> +			int new_err = volt->vid[i].uv - uv;
> +			if (abs(new_err) < abs(err)
> +			    || (err < 0 && new_err >= 0)) {
> +				best = i;
> +				err = new_err;
> +			}
> +		}
> +
> +		if (err == 0) {
> +			ret = volt->func->vid_set(volt, volt->vid[best].vid);
>   			nvkm_debug(subdev, "set %duv: %d\n", uv, ret);
>   			break;
>   		}
>   	}
> +
> +	if (best != -1) {
> +		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;
>   }
The code is really weird though :o How about the following? It would 
make it much more readable and actually do what your commit message says.

int best = -1;
u32 best_abs_err = -1;
for (i = 0; i < volt->vid_nr; i++) {
	int abs_err = abs(volt->vid[i].uv - uv);
	if (volt->vid[i].uv >= uv && abs_err < best_abs_err) {
		best = i;
		best_abs_err = abs_err;		
		if (abs_err == 0)
			break;
	 }
}

if (best >= 0) {
	ret = volt->func->vid_set(volt, volt->vid[best].vid);
	nvkm_debug(subdev, "set %duv: %d\n", uv, ret);
} else {
	/* return an error to tell that we cannot use the wanted clock since we cannot
select the needed voltage! */
}

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