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(nvkm_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(nvkm_device(device)), &dev_attr_pstate); return 0; }
static int nouveau_debugfs_pstate_get(struct seq_file *m, void *data) { struct drm_device *drm = m->private; struct nouveau_debugfs *debugfs = nouveau_debugfs(drm); struct nvif_object *ctrl = &debugfs->ctrl; struct nvif_control_pstate_info_v0 info = {}; int ret, i; if (!debugfs) return -ENODEV; ret = nvif_mthd(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(ctrl, NVIF_CONTROL_PSTATE_ATTR, &attr, sizeof(attr)); if (ret) return ret; if (i < info.count) seq_printf(m, "%02x:", attr.state); else seq_printf(m, "%s:", info.pwrsrc == 0 ? "DC" : info.pwrsrc == 1 ? "AC" : "--"); attr.index = 0; do { attr.state = state; ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR, &attr, sizeof(attr)); if (ret) return ret; seq_printf(m, " %s %d", attr.name, attr.min); if (attr.min != attr.max) seq_printf(m, "-%d", attr.max); seq_printf(m, " %s", attr.unit); } while (attr.index); if (state >= 0) { if (info.ustate_ac == state) seq_printf(m, " AC"); if (info.ustate_dc == state) seq_printf(m, " DC"); if (info.pstate == state) seq_printf(m, " *"); } else { if (info.ustate_ac < -1) seq_printf(m, " AC"); if (info.ustate_dc < -1) seq_printf(m, " DC"); } seq_printf(m, "\n"); } return 0; } static ssize_t nouveau_debugfs_pstate_set(struct file *file, const char __user *ubuf, size_t len, loff_t *offp) { struct seq_file *m = file->private_data; struct drm_device *drm = m->private; struct nouveau_debugfs *debugfs = nouveau_debugfs(drm); struct nvif_object *ctrl = &debugfs->ctrl; struct nvif_control_pstate_user_v0 args = { .pwrsrc = -EINVAL }; char buf[32] = {}, *tmp, *cur = buf; long value, ret; if (!debugfs) return -ENODEV; if (len >= sizeof(buf)) return -EINVAL; if (copy_from_user(buf, ubuf, len)) return -EFAULT; if ((tmp = strchr(buf, '\n'))) *tmp = '\0'; if (!strncasecmp(cur, "dc:", 3)) { args.pwrsrc = 0; cur += 3; } else if (!strncasecmp(cur, "ac:", 3)) { args.pwrsrc = 1; cur += 3; } if (!strcasecmp(cur, "none")) args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_UNKNOWN; else if (!strcasecmp(cur, "auto")) args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_PERFMON; else { ret = kstrtol(cur, 16, &value); if (ret) return ret; args.ustate = value; } ret = pm_runtime_get_sync(drm->dev); if (ret < 0 && ret != -EACCES) return ret; ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_USER, &args, sizeof(args)); pm_runtime_put_autosuspend(drm->dev); if (ret < 0) return ret; return len; } static int nouveau_debugfs_pstate_open(struct inode *inode, struct file *file) { return single_open(file, nouveau_debugfs_pstate_get, inode->i_private); } static const struct file_operations nouveau_pstate_fops = { .owner = THIS_MODULE, .open = nouveau_debugfs_pstate_open, .read = seq_read, .write = nouveau_debugfs_pstate_set, }; static struct drm_info_list nouveau_debugfs_list[] = { { "vbios.rom", nouveau_debugfs_vbios_image, 0, NULL }, { "strap_peek", nouveau_debugfs_strap_peek, 0, NULL }, }; #define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list) static const struct nouveau_debugfs_files { const char *name; const struct file_operations *fops; } nouveau_debugfs_files[] = { {"pstate", &nouveau_pstate_fops}, }; int nouveau_drm_debugfs_init(struct drm_minor *minor) { struct nouveau_drm *drm = nouveau_drm(minor->dev); struct dentry *dentry; int i, ret; for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) { dentry = debugfs_create_file(nouveau_debugfs_files[i].name, S_IRUGO | S_IWUSR, minor->debugfs_root, minor->dev, nouveau_debugfs_files[i].fops); if (!dentry) return -ENOMEM; } ret = drm_debugfs_create_files(nouveau_debugfs_list, NOUVEAU_DEBUGFS_ENTRIES, minor->debugfs_root, minor); if (ret) return ret; /* Set the size of the vbios since we know it, and it's confusing to * userspace if it wants to seek() but the file has a length of 0 */ dentry = debugfs_lookup("vbios.rom", minor->debugfs_root); if (!dentry) return 0; d_inode(dentry)->i_size = drm->vbios.length; dput(dentry); return 0; } int nouveau_debugfs_init(struct nouveau_drm *drm) { int ret; drm->debugfs = kzalloc(sizeof(*drm->debugfs), GFP_KERNEL); if (!drm->debugfs) return -ENOMEM; ret = nvif_object_init(&drm->client.device.object, 0, NVIF_CLASS_CONTROL, NULL, 0, &drm->debugfs->ctrl); if (ret) return ret; return 0; } void nouveau_debugfs_fini(struct nouveau_drm *drm) { if (drm->debugfs && drm->debugfs->ctrl.priv) nvif_object_fini(&drm->debugfs->ctrl); kfree(drm->debugfs); drm->debugfs = NULL; }