1 /* 2 * Copyright (C) 2009 Red Hat <bskeggs@redhat.com> 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining 5 * a copy of this software and associated documentation files (the 6 * "Software"), to deal in the Software without restriction, including 7 * without limitation the rights to use, copy, modify, merge, publish, 8 * distribute, sublicense, and/or sell copies of the Software, and to 9 * permit persons to whom the Software is furnished to do so, subject to 10 * the following conditions: 11 * 12 * The above copyright notice and this permission notice (including the 13 * next paragraph) shall be included in all copies or substantial 14 * portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 19 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE 20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 23 * 24 */ 25 26 /* 27 * Authors: 28 * Ben Skeggs <bskeggs@redhat.com> 29 */ 30 31 #include <linux/debugfs.h> 32 #include <nvif/class.h> 33 #include <nvif/if0001.h> 34 #include "nouveau_debugfs.h" 35 #include "nouveau_drv.h" 36 37 static int 38 nouveau_debugfs_vbios_image(struct seq_file *m, void *data) 39 { 40 struct drm_info_node *node = (struct drm_info_node *) m->private; 41 struct nouveau_drm *drm = nouveau_drm(node->minor->dev); 42 int i; 43 44 for (i = 0; i < drm->vbios.length; i++) 45 seq_printf(m, "%c", drm->vbios.data[i]); 46 return 0; 47 } 48 49 static int 50 nouveau_debugfs_pstate_get(struct seq_file *m, void *data) 51 { 52 struct drm_device *drm = m->private; 53 struct nouveau_debugfs *debugfs = nouveau_debugfs(drm); 54 struct nvif_object *ctrl = &debugfs->ctrl; 55 struct nvif_control_pstate_info_v0 info = {}; 56 int ret, i; 57 58 if (!debugfs) 59 return -ENODEV; 60 61 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_INFO, &info, sizeof(info)); 62 if (ret) 63 return ret; 64 65 for (i = 0; i < info.count + 1; i++) { 66 const s32 state = i < info.count ? i : 67 NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT; 68 struct nvif_control_pstate_attr_v0 attr = { 69 .state = state, 70 .index = 0, 71 }; 72 73 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR, 74 &attr, sizeof(attr)); 75 if (ret) 76 return ret; 77 78 if (i < info.count) 79 seq_printf(m, "%02x:", attr.state); 80 else 81 seq_printf(m, "%s:", info.pwrsrc == 0 ? "DC" : 82 info.pwrsrc == 1 ? "AC" : "--"); 83 84 attr.index = 0; 85 do { 86 attr.state = state; 87 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR, 88 &attr, sizeof(attr)); 89 if (ret) 90 return ret; 91 92 seq_printf(m, " %s %d", attr.name, attr.min); 93 if (attr.min != attr.max) 94 seq_printf(m, "-%d", attr.max); 95 seq_printf(m, " %s", attr.unit); 96 } while (attr.index); 97 98 if (state >= 0) { 99 if (info.ustate_ac == state) 100 seq_printf(m, " AC"); 101 if (info.ustate_dc == state) 102 seq_printf(m, " DC"); 103 if (info.pstate == state) 104 seq_printf(m, " *"); 105 } else { 106 if (info.ustate_ac < -1) 107 seq_printf(m, " AC"); 108 if (info.ustate_dc < -1) 109 seq_printf(m, " DC"); 110 } 111 112 seq_printf(m, "\n"); 113 } 114 115 return 0; 116 } 117 118 static ssize_t 119 nouveau_debugfs_pstate_set(struct file *file, const char __user *ubuf, 120 size_t len, loff_t *offp) 121 { 122 struct seq_file *m = file->private_data; 123 struct drm_device *drm = m->private; 124 struct nouveau_debugfs *debugfs = nouveau_debugfs(drm); 125 struct nvif_object *ctrl = &debugfs->ctrl; 126 struct nvif_control_pstate_user_v0 args = { .pwrsrc = -EINVAL }; 127 char buf[32] = {}, *tmp, *cur = buf; 128 long value, ret; 129 130 if (!debugfs) 131 return -ENODEV; 132 133 if (len >= sizeof(buf)) 134 return -EINVAL; 135 136 if (copy_from_user(buf, ubuf, len)) 137 return -EFAULT; 138 139 if ((tmp = strchr(buf, '\n'))) 140 *tmp = '\0'; 141 142 if (!strncasecmp(cur, "dc:", 3)) { 143 args.pwrsrc = 0; 144 cur += 3; 145 } else 146 if (!strncasecmp(cur, "ac:", 3)) { 147 args.pwrsrc = 1; 148 cur += 3; 149 } 150 151 if (!strcasecmp(cur, "none")) 152 args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_UNKNOWN; 153 else 154 if (!strcasecmp(cur, "auto")) 155 args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_PERFMON; 156 else { 157 ret = kstrtol(cur, 16, &value); 158 if (ret) 159 return ret; 160 args.ustate = value; 161 } 162 163 ret = pm_runtime_get_sync(drm->dev); 164 if (IS_ERR_VALUE(ret) && ret != -EACCES) 165 return ret; 166 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_USER, &args, sizeof(args)); 167 pm_runtime_put_autosuspend(drm->dev); 168 if (ret < 0) 169 return ret; 170 171 return len; 172 } 173 174 static int 175 nouveau_debugfs_pstate_open(struct inode *inode, struct file *file) 176 { 177 return single_open(file, nouveau_debugfs_pstate_get, inode->i_private); 178 } 179 180 static const struct file_operations nouveau_pstate_fops = { 181 .owner = THIS_MODULE, 182 .open = nouveau_debugfs_pstate_open, 183 .read = seq_read, 184 .write = nouveau_debugfs_pstate_set, 185 }; 186 187 static struct drm_info_list nouveau_debugfs_list[] = { 188 { "vbios.rom", nouveau_debugfs_vbios_image, 0, NULL }, 189 }; 190 #define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list) 191 192 static const struct nouveau_debugfs_files { 193 const char *name; 194 const struct file_operations *fops; 195 } nouveau_debugfs_files[] = { 196 {"pstate", &nouveau_pstate_fops}, 197 }; 198 199 int 200 nouveau_drm_debugfs_init(struct drm_minor *minor) 201 { 202 struct dentry *dentry; 203 int i; 204 205 for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) { 206 dentry = debugfs_create_file(nouveau_debugfs_files[i].name, 207 S_IRUGO | S_IWUSR, 208 minor->debugfs_root, minor->dev, 209 nouveau_debugfs_files[i].fops); 210 if (!dentry) 211 return -ENOMEM; 212 } 213 214 return drm_debugfs_create_files(nouveau_debugfs_list, 215 NOUVEAU_DEBUGFS_ENTRIES, 216 minor->debugfs_root, minor); 217 } 218 219 int 220 nouveau_debugfs_init(struct nouveau_drm *drm) 221 { 222 int ret; 223 224 drm->debugfs = kzalloc(sizeof(*drm->debugfs), GFP_KERNEL); 225 if (!drm->debugfs) 226 return -ENOMEM; 227 228 ret = nvif_object_init(&drm->client.device.object, 0, 229 NVIF_CLASS_CONTROL, NULL, 0, 230 &drm->debugfs->ctrl); 231 if (ret) 232 return ret; 233 234 return 0; 235 } 236 237 void 238 nouveau_debugfs_fini(struct nouveau_drm *drm) 239 { 240 if (drm->debugfs && drm->debugfs->ctrl.priv) 241 nvif_object_fini(&drm->debugfs->ctrl); 242 243 kfree(drm->debugfs); 244 drm->debugfs = NULL; 245 } 246