drm/nouveau: import initial work on vbios performance table parsing

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

1 files changed, 214 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_pm.c b/drivers/gpu/drm/nouveau/nouveau_pm.c
new file mode 100644
index 000000000000..9cf5fd665b8c
--- /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);
+}
+