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authorBen Skeggs <bskeggs@redhat.com>2013-10-15 11:52:56 +1000
committerBen Skeggs <bskeggs@redhat.com>2013-11-08 16:04:39 +1000
commit2a3980e3356c688af8e75c1015b64515be0a512e (patch)
treec672733cdc7b3158b168213ba1dd11057ccb5751
parent25e7817fcbc2f1e857d8d3b4d1becdeb92334b85 (diff)
drm/nouveau: implement a simple sysfs interface to new pm code
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
-rw-r--r--drivers/gpu/drm/nouveau/Makefile2
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_drm.c3
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_drm.h10
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_sysfs.c162
-rw-r--r--drivers/gpu/drm/nouveau/nouveau_sysfs.h19
5 files changed, 191 insertions, 5 deletions
diff --git a/drivers/gpu/drm/nouveau/Makefile b/drivers/gpu/drm/nouveau/Makefile
index e61dcbe09f08..64b4691b294a 100644
--- a/drivers/gpu/drm/nouveau/Makefile
+++ b/drivers/gpu/drm/nouveau/Makefile
@@ -300,7 +300,7 @@ include $(src)/dispnv04/Makefile
nouveau-y += nv50_display.o
# drm/pm
-nouveau-y += nouveau_hwmon.o
+nouveau-y += nouveau_hwmon.o nouveau_sysfs.o
# other random bits
nouveau-$(CONFIG_COMPAT) += nouveau_ioc32.o
diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index fc5c47891d35..768b83a7a98f 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -46,6 +46,7 @@
#include "nouveau_gem.h"
#include "nouveau_agp.h"
#include "nouveau_vga.h"
+#include "nouveau_sysfs.h"
#include "nouveau_hwmon.h"
#include "nouveau_acpi.h"
#include "nouveau_bios.h"
@@ -384,6 +385,7 @@ nouveau_drm_load(struct drm_device *dev, unsigned long flags)
goto fail_dispinit;
}
+ nouveau_sysfs_init(dev);
nouveau_hwmon_init(dev);
nouveau_accel_init(drm);
nouveau_fbcon_init(dev);
@@ -421,6 +423,7 @@ nouveau_drm_unload(struct drm_device *dev)
nouveau_fbcon_fini(dev);
nouveau_accel_fini(drm);
nouveau_hwmon_fini(dev);
+ nouveau_sysfs_fini(dev);
if (dev->mode_config.num_crtc)
nouveau_display_fini(dev);
diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.h b/drivers/gpu/drm/nouveau/nouveau_drm.h
index e6d6a6b0053f..71ed2dadae61 100644
--- a/drivers/gpu/drm/nouveau/nouveau_drm.h
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.h
@@ -51,10 +51,11 @@ struct nouveau_drm_tile {
};
enum nouveau_drm_handle {
- NVDRM_CLIENT = 0xffffffff,
- NVDRM_DEVICE = 0xdddddddd,
- NVDRM_PUSH = 0xbbbb0000, /* |= client chid */
- NVDRM_CHAN = 0xcccc0000, /* |= client chid */
+ NVDRM_CLIENT = 0xffffffff,
+ NVDRM_DEVICE = 0xdddddddd,
+ NVDRM_CONTROL = 0xdddddddc,
+ NVDRM_PUSH = 0xbbbb0000, /* |= client chid */
+ NVDRM_CHAN = 0xcccc0000, /* |= client chid */
};
struct nouveau_cli {
@@ -130,6 +131,7 @@ struct nouveau_drm {
/* power management */
struct nouveau_hwmon *hwmon;
+ struct nouveau_sysfs *sysfs;
/* display power reference */
bool have_disp_power_ref;
diff --git a/drivers/gpu/drm/nouveau/nouveau_sysfs.c b/drivers/gpu/drm/nouveau/nouveau_sysfs.c
new file mode 100644
index 000000000000..89201a17ce75
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_sysfs.c
@@ -0,0 +1,162 @@
+/*
+ * Copyright 2013 Red Hat Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Authors: Ben Skeggs <bskeggs@redhat.com>
+ */
+
+#include "nouveau_sysfs.h"
+
+#include <core/object.h>
+#include <core/class.h>
+
+static inline struct drm_device *
+drm_device(struct device *d)
+{
+ return pci_get_drvdata(to_pci_dev(d));
+}
+
+#define snappendf(p,r,f,a...) do { \
+ snprintf(p, r, f, ##a); \
+ r -= strlen(p); \
+ p += strlen(p); \
+} while(0)
+
+static ssize_t
+nouveau_sysfs_pstate_get(struct device *d, struct device_attribute *a, char *b)
+{
+ struct nouveau_sysfs *sysfs = nouveau_sysfs(drm_device(d));
+ struct nv_control_pstate_info info;
+ size_t cnt = PAGE_SIZE;
+ char *buf = b;
+ int ret, i;
+
+ ret = nv_exec(sysfs->ctrl, NV_CONTROL_PSTATE_INFO, &info, sizeof(info));
+ if (ret)
+ return ret;
+
+ for (i = 0; i < info.count + 1; i++) {
+ const s32 state = i < info.count ? i :
+ NV_CONTROL_PSTATE_ATTR_STATE_CURRENT;
+ struct nv_control_pstate_attr attr = {
+ .state = state,
+ .index = 0,
+ };
+
+ ret = nv_exec(sysfs->ctrl, NV_CONTROL_PSTATE_ATTR,
+ &attr, sizeof(attr));
+ if (ret)
+ return ret;
+
+ if (i < info.count)
+ snappendf(buf, cnt, "%02x:", attr.state);
+ else
+ snappendf(buf, cnt, "--:");
+
+ attr.index = 0;
+ do {
+ attr.state = state;
+ ret = nv_exec(sysfs->ctrl, NV_CONTROL_PSTATE_ATTR,
+ &attr, sizeof(attr));
+ if (ret)
+ return ret;
+
+ snappendf(buf, cnt, " %s %d", attr.name, attr.min);
+ if (attr.min != attr.max)
+ snappendf(buf, cnt, "-%d", attr.max);
+ snappendf(buf, cnt, " %s", attr.unit);
+ } while (attr.index);
+
+ if ((state >= 0 && info.pstate == state) ||
+ (state < 0 && info.ustate < 0))
+ snappendf(buf, cnt, " *");
+ snappendf(buf, cnt, "\n");
+ }
+
+ return strlen(b);
+}
+
+static ssize_t
+nouveau_sysfs_pstate_set(struct device *d, struct device_attribute *a,
+ const char *buf, size_t count)
+{
+ struct nouveau_sysfs *sysfs = nouveau_sysfs(drm_device(d));
+ struct nv_control_pstate_user args;
+ long value, ret;
+ char *tmp;
+
+ if ((tmp = strchr(buf, '\n')))
+ *tmp = '\0';
+
+ if (!strcasecmp(buf, "none"))
+ args.state = NV_CONTROL_PSTATE_USER_STATE_UNKNOWN;
+ else
+ if (!strcasecmp(buf, "auto"))
+ args.state = NV_CONTROL_PSTATE_USER_STATE_PERFMON;
+ else {
+ ret = kstrtol(buf, 16, &value);
+ if (ret)
+ return ret;
+ args.state = value;
+ }
+
+ ret = nv_exec(sysfs->ctrl, NV_CONTROL_PSTATE_USER, &args, sizeof(args));
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+static DEVICE_ATTR(pstate, S_IRUGO | S_IWUSR,
+ nouveau_sysfs_pstate_get, nouveau_sysfs_pstate_set);
+
+void
+nouveau_sysfs_fini(struct drm_device *dev)
+{
+ struct nouveau_sysfs *sysfs = nouveau_sysfs(dev);
+ struct nouveau_drm *drm = nouveau_drm(dev);
+
+ if (sysfs->ctrl) {
+ device_remove_file(&dev->pdev->dev, &dev_attr_pstate);
+ nouveau_object_del(nv_object(drm), NVDRM_DEVICE, NVDRM_CONTROL);
+ }
+
+ drm->sysfs = NULL;
+ kfree(sysfs);
+}
+
+int
+nouveau_sysfs_init(struct drm_device *dev)
+{
+ struct nouveau_drm *drm = nouveau_drm(dev);
+ struct nouveau_sysfs *sysfs;
+ int ret;
+
+ sysfs = drm->sysfs = kzalloc(sizeof(*sysfs), GFP_KERNEL);
+ if (!sysfs)
+ return -ENOMEM;
+
+ ret = nouveau_object_new(nv_object(drm), NVDRM_DEVICE, NVDRM_CONTROL,
+ NV_CONTROL_CLASS, NULL, 0, &sysfs->ctrl);
+ if (ret == 0)
+ device_create_file(&dev->pdev->dev, &dev_attr_pstate);
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/nouveau/nouveau_sysfs.h b/drivers/gpu/drm/nouveau/nouveau_sysfs.h
new file mode 100644
index 000000000000..74b47f1e01ed
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_sysfs.h
@@ -0,0 +1,19 @@
+#ifndef __NOUVEAU_SYSFS_H__
+#define __NOUVEAU_SYSFS_H__
+
+#include "nouveau_drm.h"
+
+struct nouveau_sysfs {
+ struct nouveau_object *ctrl;
+};
+
+static inline struct nouveau_sysfs *
+nouveau_sysfs(struct drm_device *dev)
+{
+ return nouveau_drm(dev)->sysfs;
+}
+
+int nouveau_sysfs_init(struct drm_device *);
+void nouveau_sysfs_fini(struct drm_device *);
+
+#endif