| /* |
| * 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 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 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, "%s:", info.pwrsrc == 0 ? "DC" : |
| info.pwrsrc == 1 ? "AC" : |
| "--"); |
| |
| 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) { |
| 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 nv_control_pstate_user 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 = NV_CONTROL_PSTATE_USER_STATE_UNKNOWN; |
| else |
| if (!strcasecmp(buf, "auto")) |
| args.ustate = NV_CONTROL_PSTATE_USER_STATE_PERFMON; |
| else { |
| ret = kstrtol(buf, 16, &value); |
| if (ret) |
| return ret; |
| args.ustate = 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); |
| struct nouveau_device *device = nv_device(drm->device); |
| |
| if (sysfs->ctrl) { |
| device_remove_file(nv_device_base(device), &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_device *device = nv_device(drm->device); |
| 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(nv_device_base(device), &dev_attr_pstate); |
| |
| return 0; |
| } |