drm/nouveau: import initial work on vbios performance table parsing
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
diff --git a/drivers/gpu/drm/nouveau/Makefile b/drivers/gpu/drm/nouveau/Makefile
index d6cfbf2..2fd6188 100644
--- a/drivers/gpu/drm/nouveau/Makefile
+++ b/drivers/gpu/drm/nouveau/Makefile
@@ -10,6 +10,7 @@
nouveau_hw.o nouveau_calc.o nouveau_bios.o nouveau_i2c.o \
nouveau_display.o nouveau_connector.o nouveau_fbcon.o \
nouveau_dp.o nouveau_ramht.o \
+ nouveau_pm.o nouveau_volt.o nouveau_perf.o \
nv04_timer.o \
nv04_mc.o nv40_mc.o nv50_mc.o \
nv04_fb.o nv10_fb.o nv30_fb.o nv40_fb.o nv50_fb.o nvc0_fb.o \
diff --git a/drivers/gpu/drm/nouveau/nouveau_drv.h b/drivers/gpu/drm/nouveau/nouveau_drv.h
index d2fecc0..bda4d1e 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drv.h
+++ b/drivers/gpu/drm/nouveau/nouveau_drv.h
@@ -359,6 +359,51 @@
void (*irq_enable)(struct drm_device *, enum dcb_gpio_tag, bool on);
};
+struct nouveau_pm_voltage_level {
+ u8 voltage;
+ u8 vid;
+};
+
+struct nouveau_pm_voltage {
+ bool supported;
+ u8 vid_mask;
+
+ struct nouveau_pm_voltage_level *level;
+ int nr_level;
+};
+
+#define NOUVEAU_PM_MAX_LEVEL 8
+struct nouveau_pm_level {
+ struct device_attribute dev_attr;
+ char name[32];
+ int id;
+
+ u32 core;
+ u32 memory;
+ u32 shader;
+ u32 unk05;
+
+ u8 voltage;
+ u8 fanspeed;
+};
+
+struct nouveau_pm_engine {
+ struct nouveau_pm_voltage voltage;
+ struct nouveau_pm_level perflvl[NOUVEAU_PM_MAX_LEVEL];
+ int nr_perflvl;
+
+ struct nouveau_pm_level boot;
+ struct nouveau_pm_level *cur;
+
+ int (*clock_get)(struct drm_device *, u32 id);
+ void *(*clock_pre)(struct drm_device *, u32 id, int khz);
+ void (*clock_set)(struct drm_device *, void *);
+ int (*voltage_get)(struct drm_device *);
+ int (*voltage_set)(struct drm_device *, int voltage);
+ int (*fanspeed_get)(struct drm_device *);
+ int (*fanspeed_set)(struct drm_device *, int fanspeed);
+};
+
struct nouveau_engine {
struct nouveau_instmem_engine instmem;
struct nouveau_mc_engine mc;
@@ -368,6 +413,7 @@
struct nouveau_fifo_engine fifo;
struct nouveau_display_engine display;
struct nouveau_gpio_engine gpio;
+ struct nouveau_pm_engine pm;
};
struct nouveau_pll_vals {
diff --git a/drivers/gpu/drm/nouveau/nouveau_perf.c b/drivers/gpu/drm/nouveau/nouveau_perf.c
new file mode 100644
index 0000000..a882a36
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_perf.c
@@ -0,0 +1,159 @@
+/*
+ * Copyright 2010 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 "drmP.h"
+
+#include "nouveau_drv.h"
+#include "nouveau_pm.h"
+
+void
+nouveau_perf_init(struct drm_device *dev)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
+ struct nvbios *bios = &dev_priv->vbios;
+ struct bit_entry P;
+ u8 version, headerlen, recordlen, entries;
+ u8 *perf, *entry;
+ int vid, i;
+
+ if (bios->type == NVBIOS_BIT) {
+ if (bit_table(dev, 'P', &P))
+ return;
+
+ if (P.version != 1 && P.version != 2) {
+ NV_WARN(dev, "unknown perf for BIT P %d\n", P.version);
+ return;
+ }
+
+ perf = ROMPTR(bios, P.data[0]);
+ version = perf[0];
+ headerlen = perf[1];
+ if (version < 0x40) {
+ recordlen = perf[3] + (perf[4] * perf[5]);
+ entries = perf[2];
+ } else {
+ recordlen = perf[2] + (perf[3] * perf[4]);
+ entries = perf[5];
+ }
+ } else {
+ if (bios->data[bios->offset + 6] < 0x27) {
+ NV_DEBUG(dev, "BMP version too old for perf\n");
+ return;
+ }
+
+ perf = ROMPTR(bios, bios->data[bios->offset + 0x94]);
+ if (!perf) {
+ NV_DEBUG(dev, "perf table pointer invalid\n");
+ return;
+ }
+
+ version = perf[1];
+ headerlen = perf[0];
+ recordlen = perf[3];
+ entries = perf[2];
+ }
+
+ entry = perf + headerlen;
+ for (i = 0; i < entries; i++) {
+ struct nouveau_pm_level *perflvl = &pm->perflvl[pm->nr_perflvl];
+
+ if (entry[0] == 0xff) {
+ entry += recordlen;
+ continue;
+ }
+
+ switch (version) {
+ case 0x12:
+ case 0x13:
+ case 0x15:
+ perflvl->fanspeed = entry[55];
+ perflvl->voltage = entry[56];
+ perflvl->core = ROM32(entry[1]) / 100;
+ perflvl->memory = ROM32(entry[5]) / 100;
+ break;
+ case 0x21:
+ case 0x23:
+ case 0x24:
+ perflvl->fanspeed = entry[4];
+ perflvl->voltage = entry[5];
+ perflvl->core = ROM16(entry[6]);
+ perflvl->memory = ROM16(entry[11]);
+ break;
+ case 0x25:
+ perflvl->fanspeed = entry[4];
+ perflvl->voltage = entry[5];
+ perflvl->core = ROM16(entry[6]);
+ perflvl->shader = ROM16(entry[10]);
+ perflvl->memory = ROM16(entry[12]);
+ break;
+ case 0x30:
+ case 0x35:
+ perflvl->fanspeed = entry[6];
+ perflvl->voltage = entry[7];
+ perflvl->core = ROM16(entry[8]);
+ perflvl->shader = ROM16(entry[10]);
+ perflvl->memory = ROM16(entry[12]);
+ /*XXX: confirm on 0x35 */
+ perflvl->unk05 = ROM16(entry[16]);
+ break;
+ case 0x40:
+#define subent(n) entry[perf[2] + ((n) * perf[3])]
+ perflvl->fanspeed = 0; /*XXX*/
+ perflvl->voltage = 0; /*XXX: entry[2] */;
+ perflvl->core = ROM16(subent(0)) & 0xfff;
+ perflvl->shader = ROM16(subent(1)) & 0xfff;
+ perflvl->memory = ROM16(subent(2)) & 0xfff;
+ break;
+ }
+
+ /* convert MHz -> KHz, it's more convenient */
+ perflvl->core *= 1000;
+ perflvl->memory *= 1000;
+ perflvl->shader *= 1000;
+ perflvl->unk05 *= 1000;
+
+ /* make sure vid is valid */
+ if (pm->voltage.supported && perflvl->voltage) {
+ vid = nouveau_volt_vid_lookup(dev, perflvl->voltage);
+ if (vid < 0) {
+ NV_DEBUG(dev, "drop perflvl %d, bad vid\n", i);
+ entry += recordlen;
+ continue;
+ }
+ }
+
+ snprintf(perflvl->name, sizeof(perflvl->name),
+ "performance_level_%d", i);
+ perflvl->id = i;
+ pm->nr_perflvl++;
+
+ entry += recordlen;
+ }
+}
+
+void
+nouveau_perf_fini(struct drm_device *dev)
+{
+}
diff --git a/drivers/gpu/drm/nouveau/nouveau_pm.c b/drivers/gpu/drm/nouveau/nouveau_pm.c
new file mode 100644
index 0000000..9cf5fd6
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_pm.c
@@ -0,0 +1,214 @@
+/*
+ * Copyright 2010 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 "drmP.h"
+
+#include "nouveau_drv.h"
+#include "nouveau_pm.h"
+
+static int
+nouveau_pm_perflvl_get(struct drm_device *dev, struct nouveau_pm_level *perflvl)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
+ int ret;
+
+ if (!pm->clock_get)
+ return -EINVAL;
+
+ memset(perflvl, 0, sizeof(*perflvl));
+
+ ret = pm->clock_get(dev, PLL_CORE);
+ if (ret > 0)
+ perflvl->core = ret;
+
+ ret = pm->clock_get(dev, PLL_MEMORY);
+ if (ret > 0)
+ perflvl->memory = ret;
+
+ ret = pm->clock_get(dev, PLL_SHADER);
+ if (ret > 0)
+ perflvl->shader = ret;
+
+ ret = pm->clock_get(dev, PLL_UNK05);
+ if (ret > 0)
+ perflvl->unk05 = ret;
+
+ if (pm->voltage.supported && pm->voltage_get) {
+ ret = pm->voltage_get(dev);
+ if (ret > 0)
+ perflvl->voltage = ret;
+ }
+
+ return 0;
+}
+
+static void
+nouveau_pm_perflvl_info(struct nouveau_pm_level *perflvl, char *ptr, int len)
+{
+ char s[16], v[16], f[16];
+
+ s[0] = '\0';
+ if (perflvl->shader)
+ snprintf(s, sizeof(s), " shader %dMHz", perflvl->shader / 1000);
+
+ v[0] = '\0';
+ if (perflvl->voltage)
+ snprintf(v, sizeof(v), " voltage %dmV", perflvl->voltage * 10);
+
+ f[0] = '\0';
+ if (perflvl->fanspeed)
+ snprintf(f, sizeof(f), " fanspeed %d%%", perflvl->fanspeed);
+
+ snprintf(ptr, len, "core %dMHz memory %dMHz%s%s%s\n",
+ perflvl->core / 1000, perflvl->memory / 1000, s, v, f);
+}
+
+static ssize_t
+nouveau_pm_get_perflvl_info(struct device *d,
+ struct device_attribute *a, char *buf)
+{
+ struct nouveau_pm_level *perflvl = (struct nouveau_pm_level *)a;
+ char *ptr = buf;
+ int len = PAGE_SIZE;
+
+ snprintf(ptr, len, "%d: ", perflvl->id);
+ ptr += strlen(buf);
+ len -= strlen(buf);
+
+ nouveau_pm_perflvl_info(perflvl, ptr, len);
+ return strlen(buf);
+}
+
+static ssize_t
+nouveau_pm_get_perflvl(struct device *d, struct device_attribute *a, char *buf)
+{
+ struct drm_device *dev = pci_get_drvdata(to_pci_dev(d));
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
+ struct nouveau_pm_level cur;
+ int len = PAGE_SIZE, ret;
+ char *ptr = buf;
+
+ if (!pm->cur)
+ snprintf(ptr, len, "setting: boot\n");
+ else if (pm->cur == &pm->boot)
+ snprintf(ptr, len, "setting: boot\nc: ");
+ else
+ snprintf(ptr, len, "setting: static %d\nc: ", pm->cur->id);
+ ptr += strlen(buf);
+ len -= strlen(buf);
+
+ ret = nouveau_pm_perflvl_get(dev, &cur);
+ if (ret == 0)
+ nouveau_pm_perflvl_info(&cur, ptr, len);
+ return strlen(buf);
+}
+
+static ssize_t
+nouveau_pm_set_perflvl(struct device *d, struct device_attribute *a,
+ const char *buf, size_t count)
+{
+ return -EPERM;
+}
+
+DEVICE_ATTR(performance_level, S_IRUGO | S_IWUSR,
+ nouveau_pm_get_perflvl, nouveau_pm_set_perflvl);
+
+int
+nouveau_pm_init(struct drm_device *dev)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
+ struct device *d = &dev->pdev->dev;
+ char info[256];
+ int ret, i;
+
+ nouveau_volt_init(dev);
+ nouveau_perf_init(dev);
+
+ NV_INFO(dev, "%d available performance level(s)\n", pm->nr_perflvl);
+ for (i = 0; i < pm->nr_perflvl; i++) {
+ nouveau_pm_perflvl_info(&pm->perflvl[i], info, sizeof(info));
+ NV_INFO(dev, "%d: %s", pm->perflvl[i].id, info);
+ }
+
+ /* determine current ("boot") performance level */
+ ret = nouveau_pm_perflvl_get(dev, &pm->boot);
+ if (ret == 0) {
+ pm->cur = &pm->boot;
+
+ nouveau_pm_perflvl_info(&pm->boot, info, sizeof(info));
+ NV_INFO(dev, "c: %s", info);
+ }
+
+ /* initialise sysfs */
+ ret = device_create_file(d, &dev_attr_performance_level);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < pm->nr_perflvl; i++) {
+ struct nouveau_pm_level *perflvl = &pm->perflvl[i];
+
+ perflvl->dev_attr.attr.name = perflvl->name;
+ perflvl->dev_attr.attr.mode = S_IRUGO;
+ perflvl->dev_attr.show = nouveau_pm_get_perflvl_info;
+ perflvl->dev_attr.store = NULL;
+ sysfs_attr_init(&perflvl->dev_attr.attr);
+
+ ret = device_create_file(d, &perflvl->dev_attr);
+ if (ret) {
+ NV_ERROR(dev, "failed pervlvl %d sysfs: %d\n",
+ perflvl->id, i);
+ perflvl->dev_attr.attr.name = NULL;
+ nouveau_pm_fini(dev);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+void
+nouveau_pm_fini(struct drm_device *dev)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
+ struct device *d = &dev->pdev->dev;
+ int i;
+
+ device_remove_file(d, &dev_attr_performance_level);
+ for (i = 0; i < pm->nr_perflvl; i++) {
+ struct nouveau_pm_level *pl = &pm->perflvl[i];
+
+ if (!pl->dev_attr.attr.name)
+ break;
+
+ device_remove_file(d, &pl->dev_attr);
+ }
+
+ nouveau_perf_fini(dev);
+ nouveau_volt_fini(dev);
+}
+
diff --git a/drivers/gpu/drm/nouveau/nouveau_pm.h b/drivers/gpu/drm/nouveau/nouveau_pm.h
new file mode 100644
index 0000000..a401ec0
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_pm.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2010 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
+ */
+
+#ifndef __NOUVEAU_PM_H__
+#define __NOUVEAU_PM_H__
+
+/* nouveau_pm.c */
+int nouveau_pm_init(struct drm_device *dev);
+void nouveau_pm_fini(struct drm_device *dev);
+
+/* nouveau_volt.c */
+void nouveau_volt_init(struct drm_device *);
+void nouveau_volt_fini(struct drm_device *);
+int nouveau_volt_vid_lookup(struct drm_device *, int voltage);
+int nouveau_volt_lvl_lookup(struct drm_device *, int vid);
+int nouveau_voltage_gpio_get(struct drm_device *);
+int nouveau_voltage_gpio_set(struct drm_device *, int voltage);
+
+/* nouveau_perf.c */
+void nouveau_perf_init(struct drm_device *);
+void nouveau_perf_fini(struct drm_device *);
+
+#endif
diff --git a/drivers/gpu/drm/nouveau/nouveau_state.c b/drivers/gpu/drm/nouveau/nouveau_state.c
index be85960..18c4a8a 100644
--- a/drivers/gpu/drm/nouveau/nouveau_state.c
+++ b/drivers/gpu/drm/nouveau/nouveau_state.c
@@ -36,6 +36,7 @@
#include "nouveau_drm.h"
#include "nouveau_fbcon.h"
#include "nouveau_ramht.h"
+#include "nouveau_pm.h"
#include "nv50_display.h"
static void nouveau_stub_takedown(struct drm_device *dev) {}
@@ -527,6 +528,8 @@
if (ret)
goto out_display_early;
+ nouveau_pm_init(dev);
+
ret = nouveau_mem_vram_init(dev);
if (ret)
goto out_bios;
@@ -635,6 +638,7 @@
out_vram:
nouveau_mem_vram_fini(dev);
out_bios:
+ nouveau_pm_fini(dev);
nouveau_bios_takedown(dev);
out_display_early:
engine->display.late_takedown(dev);
@@ -677,6 +681,7 @@
drm_irq_uninstall(dev);
+ nouveau_pm_fini(dev);
nouveau_bios_takedown(dev);
vga_client_register(dev->pdev, NULL, NULL, NULL);
diff --git a/drivers/gpu/drm/nouveau/nouveau_volt.c b/drivers/gpu/drm/nouveau/nouveau_volt.c
new file mode 100644
index 0000000..6ce8576
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_volt.c
@@ -0,0 +1,209 @@
+/*
+ * Copyright 2010 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 "drmP.h"
+
+#include "nouveau_drv.h"
+#include "nouveau_pm.h"
+
+static const enum dcb_gpio_tag vidtag[] = { 0x04, 0x05, 0x06, 0x1a };
+static int nr_vidtag = sizeof(vidtag) / sizeof(vidtag[0]);
+
+int
+nouveau_voltage_gpio_get(struct drm_device *dev)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_gpio_engine *gpio = &dev_priv->engine.gpio;
+ struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.voltage;
+ u8 vid = 0;
+ int i;
+
+ for (i = 0; i < nr_vidtag; i++) {
+ if (!(volt->vid_mask & (1 << i)))
+ continue;
+
+ vid |= gpio->get(dev, vidtag[i]) << i;
+ }
+
+ return nouveau_volt_lvl_lookup(dev, vid);
+}
+
+int
+nouveau_voltage_gpio_set(struct drm_device *dev, int voltage)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_gpio_engine *gpio = &dev_priv->engine.gpio;
+ struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.voltage;
+ int vid, i;
+
+ vid = nouveau_volt_vid_lookup(dev, voltage);
+ if (vid < 0)
+ return vid;
+
+ for (i = 0; i < nr_vidtag; i++) {
+ if (!(volt->vid_mask & (1 << i)))
+ continue;
+
+ gpio->set(dev, vidtag[i], !!(vid & (1 << i)));
+ }
+
+ return 0;
+}
+
+int
+nouveau_volt_vid_lookup(struct drm_device *dev, int voltage)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.voltage;
+ int i;
+
+ for (i = 0; i < volt->nr_level; i++) {
+ if (volt->level[i].voltage == voltage)
+ return volt->level[i].vid;
+ }
+
+ return -ENOENT;
+}
+
+int
+nouveau_volt_lvl_lookup(struct drm_device *dev, int vid)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.voltage;
+ int i;
+
+ for (i = 0; i < volt->nr_level; i++) {
+ if (volt->level[i].vid == vid)
+ return volt->level[i].voltage;
+ }
+
+ return -ENOENT;
+}
+
+void
+nouveau_volt_init(struct drm_device *dev)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_pm_engine *pm = &dev_priv->engine.pm;
+ struct nouveau_pm_voltage *voltage = &pm->voltage;
+ struct nvbios *bios = &dev_priv->vbios;
+ struct bit_entry P;
+ u8 *volt = NULL, *entry;
+ int i, recordlen, entries, vidmask, vidshift;
+
+ if (bios->type == NVBIOS_BIT) {
+ if (bit_table(dev, 'P', &P))
+ return;
+
+ if (P.version == 1)
+ volt = ROMPTR(bios, P.data[16]);
+ else
+ if (P.version == 2)
+ volt = ROMPTR(bios, P.data[12]);
+ else {
+ NV_WARN(dev, "unknown volt for BIT P %d\n", P.version);
+ }
+ } else {
+ if (bios->data[bios->offset + 6] < 0x27) {
+ NV_DEBUG(dev, "BMP version too old for voltage\n");
+ return;
+ }
+
+ volt = ROMPTR(bios, bios->data[bios->offset + 0x98]);
+ }
+
+ if (!volt) {
+ NV_DEBUG(dev, "voltage table pointer invalid\n");
+ return;
+ }
+
+ switch (volt[0]) {
+ case 0x10:
+ case 0x11:
+ case 0x12:
+ recordlen = 5;
+ entries = volt[2];
+ vidshift = 0;
+ vidmask = volt[4];
+ break;
+ case 0x20:
+ recordlen = volt[3];
+ entries = volt[2];
+ vidshift = 0; /* could be vidshift like 0x30? */
+ vidmask = volt[5];
+ break;
+ case 0x30:
+ recordlen = volt[2];
+ entries = volt[3];
+ vidshift = hweight8(volt[5]);
+ vidmask = volt[4];
+ break;
+ default:
+ NV_WARN(dev, "voltage table 0x%02x unknown\n", volt[0]);
+ return;
+ }
+
+ /* validate vid mask */
+ voltage->vid_mask = vidmask;
+ if (!voltage->vid_mask)
+ return;
+
+ i = 0;
+ while (vidmask) {
+ if (i > nr_vidtag) {
+ NV_DEBUG(dev, "vid bit %d unknown\n", i);
+ return;
+ }
+
+ if (!nouveau_bios_gpio_entry(dev, vidtag[i])) {
+ NV_DEBUG(dev, "vid bit %d has no gpio tag\n", i);
+ return;
+ }
+
+ vidmask >>= 1;
+ i++;
+ }
+
+ /* parse vbios entries into common format */
+ voltage->level = kcalloc(entries, sizeof(*voltage->level), GFP_KERNEL);
+ if (!voltage->level)
+ return;
+
+ entry = volt + volt[1];
+ for (i = 0; i < entries; i++, entry += recordlen) {
+ voltage->level[i].voltage = entry[0];
+ voltage->level[i].vid = entry[1] >> vidshift;
+ }
+ voltage->nr_level = entries;
+ voltage->supported = true;
+}
+
+void
+nouveau_volt_fini(struct drm_device *dev)
+{
+ struct drm_nouveau_private *dev_priv = dev->dev_private;
+ struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.voltage;
+
+ kfree(volt->level);
+}