--- /dev/null
+/*
+ * 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 <nvif/os.h>
+#include <nvif/class.h>
+#include <nvif/ioctl.h>
+
+#include "nouveau_sysfs.h"
+
+MODULE_PARM_DESC(pstate, "enable sysfs pstate file, which will be moved in the future");
+int nouveau_pstate;
+module_param_named(pstate, nouveau_pstate, int, 0400);
+
+static inline struct drm_device *
+drm_device(struct device *d)
+{
+ return dev_get_drvdata(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 nvif_control_pstate_info_v0 info = {};
+ size_t cnt = PAGE_SIZE;
+ char *buf = b;
+ int ret, i;
+
+ ret = nvif_mthd(&sysfs->ctrl, NVIF_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 :
+ NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT;
+ struct nvif_control_pstate_attr_v0 attr = {
+ .state = state,
+ .index = 0,
+ };
+
+ ret = nvif_mthd(&sysfs->ctrl, NVIF_CONTROL_PSTATE_ATTR,
+ &attr, sizeof(attr));
+ if (ret)
+ return ret;
+
+ if (i < info.count)
+ snappendf(buf, cnt, "%02x:", attr.state);
+ else
+ snappendf(buf, cnt, "%s:", info.pwrsrc == 0 ? "DC" :
+ info.pwrsrc == 1 ? "AC" :
+ "--");
+
+ attr.index = 0;
+ do {
+ attr.state = state;
+ ret = nvif_mthd(&sysfs->ctrl,
+ NVIF_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) {
+ if (info.ustate_ac == state)
+ snappendf(buf, cnt, " AC");
+ if (info.ustate_dc == state)
+ snappendf(buf, cnt, " DC");
+ if (info.pstate == state)
+ snappendf(buf, cnt, " *");
+ } else {
+ if (info.ustate_ac < -1)
+ snappendf(buf, cnt, " AC");
+ if (info.ustate_dc < -1)
+ snappendf(buf, cnt, " DC");
+ }
+
+ 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 nvif_control_pstate_user_v0 args = { .pwrsrc = -EINVAL };
+ long value, ret;
+ char *tmp;
+
+ if ((tmp = strchr(buf, '\n')))
+ *tmp = '\0';
+
+ if (!strncasecmp(buf, "dc:", 3)) {
+ args.pwrsrc = 0;
+ buf += 3;
+ } else
+ if (!strncasecmp(buf, "ac:", 3)) {
+ args.pwrsrc = 1;
+ buf += 3;
+ }
+
+ if (!strcasecmp(buf, "none"))
+ args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_UNKNOWN;
+ else
+ if (!strcasecmp(buf, "auto"))
+ args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_PERFMON;
+ else {
+ ret = kstrtol(buf, 16, &value);
+ if (ret)
+ return ret;
+ args.ustate = value;
+ }
+
+ ret = nvif_mthd(&sysfs->ctrl, NVIF_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);
+ struct nvif_device *device = &drm->device;
+
+ if (sysfs && sysfs->ctrl.priv) {
+ device_remove_file(nv_device_base(nvxx_device(device)), &dev_attr_pstate);
+ nvif_object_fini(&sysfs->ctrl);
+ }
+
+ drm->sysfs = NULL;
+ kfree(sysfs);
+}
+
+int
+nouveau_sysfs_init(struct drm_device *dev)
+{
+ struct nouveau_drm *drm = nouveau_drm(dev);
+ struct nvif_device *device = &drm->device;
+ struct nouveau_sysfs *sysfs;
+ int ret;
+
+ if (!nouveau_pstate)
+ return 0;
+
+ sysfs = drm->sysfs = kzalloc(sizeof(*sysfs), GFP_KERNEL);
+ if (!sysfs)
+ return -ENOMEM;
+
+ ret = nvif_object_init(nvif_object(device), NULL, NVDRM_CONTROL,
+ NVIF_IOCTL_NEW_V0_CONTROL, NULL, 0,
+ &sysfs->ctrl);
+ if (ret == 0)
+ device_create_file(nv_device_base(nvxx_device(device)), &dev_attr_pstate);
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff