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_strap_peek(struct seq_file *m, void *data) 51 { 52 struct drm_info_node *node = m->private; 53 struct nouveau_drm *drm = nouveau_drm(node->minor->dev); 54 int ret; 55 56 ret = pm_runtime_get_sync(drm->dev->dev); 57 if (ret < 0 && ret != -EACCES) { 58 pm_runtime_put_autosuspend(drm->dev->dev); 59 return ret; 60 } 61 62 seq_printf(m, "0x%08x\n", 63 nvif_rd32(&drm->client.device.object, 0x101000)); 64 65 pm_runtime_mark_last_busy(drm->dev->dev); 66 pm_runtime_put_autosuspend(drm->dev->dev); 67 68 return 0; 69 } 70 71 static int 72 nouveau_debugfs_pstate_get(struct seq_file *m, void *data) 73 { 74 struct drm_device *drm = m->private; 75 struct nouveau_debugfs *debugfs = nouveau_debugfs(drm); 76 struct nvif_object *ctrl = &debugfs->ctrl; 77 struct nvif_control_pstate_info_v0 info = {}; 78 int ret, i; 79 80 if (!debugfs) 81 return -ENODEV; 82 83 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_INFO, &info, sizeof(info)); 84 if (ret) 85 return ret; 86 87 for (i = 0; i < info.count + 1; i++) { 88 const s32 state = i < info.count ? i : 89 NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT; 90 struct nvif_control_pstate_attr_v0 attr = { 91 .state = state, 92 .index = 0, 93 }; 94 95 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR, 96 &attr, sizeof(attr)); 97 if (ret) 98 return ret; 99 100 if (i < info.count) 101 seq_printf(m, "%02x:", attr.state); 102 else 103 seq_printf(m, "%s:", info.pwrsrc == 0 ? "DC" : 104 info.pwrsrc == 1 ? "AC" : "--"); 105 106 attr.index = 0; 107 do { 108 attr.state = state; 109 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR, 110 &attr, sizeof(attr)); 111 if (ret) 112 return ret; 113 114 seq_printf(m, " %s %d", attr.name, attr.min); 115 if (attr.min != attr.max) 116 seq_printf(m, "-%d", attr.max); 117 seq_printf(m, " %s", attr.unit); 118 } while (attr.index); 119 120 if (state >= 0) { 121 if (info.ustate_ac == state) 122 seq_printf(m, " AC"); 123 if (info.ustate_dc == state) 124 seq_printf(m, " DC"); 125 if (info.pstate == state) 126 seq_printf(m, " *"); 127 } else { 128 if (info.ustate_ac < -1) 129 seq_printf(m, " AC"); 130 if (info.ustate_dc < -1) 131 seq_printf(m, " DC"); 132 } 133 134 seq_printf(m, "\n"); 135 } 136 137 return 0; 138 } 139 140 static ssize_t 141 nouveau_debugfs_pstate_set(struct file *file, const char __user *ubuf, 142 size_t len, loff_t *offp) 143 { 144 struct seq_file *m = file->private_data; 145 struct drm_device *drm = m->private; 146 struct nouveau_debugfs *debugfs = nouveau_debugfs(drm); 147 struct nvif_object *ctrl = &debugfs->ctrl; 148 struct nvif_control_pstate_user_v0 args = { .pwrsrc = -EINVAL }; 149 char buf[32] = {}, *tmp, *cur = buf; 150 long value, ret; 151 152 if (!debugfs) 153 return -ENODEV; 154 155 if (len >= sizeof(buf)) 156 return -EINVAL; 157 158 if (copy_from_user(buf, ubuf, len)) 159 return -EFAULT; 160 161 if ((tmp = strchr(buf, '\n'))) 162 *tmp = '\0'; 163 164 if (!strncasecmp(cur, "dc:", 3)) { 165 args.pwrsrc = 0; 166 cur += 3; 167 } else 168 if (!strncasecmp(cur, "ac:", 3)) { 169 args.pwrsrc = 1; 170 cur += 3; 171 } 172 173 if (!strcasecmp(cur, "none")) 174 args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_UNKNOWN; 175 else 176 if (!strcasecmp(cur, "auto")) 177 args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_PERFMON; 178 else { 179 ret = kstrtol(cur, 16, &value); 180 if (ret) 181 return ret; 182 args.ustate = value; 183 } 184 185 ret = pm_runtime_get_sync(drm->dev); 186 if (ret < 0 && ret != -EACCES) { 187 pm_runtime_put_autosuspend(drm->dev); 188 return ret; 189 } 190 191 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_USER, &args, sizeof(args)); 192 pm_runtime_put_autosuspend(drm->dev); 193 if (ret < 0) 194 return ret; 195 196 return len; 197 } 198 199 static int 200 nouveau_debugfs_pstate_open(struct inode *inode, struct file *file) 201 { 202 return single_open(file, nouveau_debugfs_pstate_get, inode->i_private); 203 } 204 205 static const struct file_operations nouveau_pstate_fops = { 206 .owner = THIS_MODULE, 207 .open = nouveau_debugfs_pstate_open, 208 .read = seq_read, 209 .write = nouveau_debugfs_pstate_set, 210 }; 211 212 static struct drm_info_list nouveau_debugfs_list[] = { 213 { "vbios.rom", nouveau_debugfs_vbios_image, 0, NULL }, 214 { "strap_peek", nouveau_debugfs_strap_peek, 0, NULL }, 215 }; 216 #define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list) 217 218 static const struct nouveau_debugfs_files { 219 const char *name; 220 const struct file_operations *fops; 221 } nouveau_debugfs_files[] = { 222 {"pstate", &nouveau_pstate_fops}, 223 }; 224 225 void 226 nouveau_drm_debugfs_init(struct drm_minor *minor) 227 { 228 struct nouveau_drm *drm = nouveau_drm(minor->dev); 229 struct dentry *dentry; 230 int i; 231 232 for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) { 233 debugfs_create_file(nouveau_debugfs_files[i].name, 234 S_IRUGO | S_IWUSR, 235 minor->debugfs_root, minor->dev, 236 nouveau_debugfs_files[i].fops); 237 } 238 239 drm_debugfs_create_files(nouveau_debugfs_list, 240 NOUVEAU_DEBUGFS_ENTRIES, 241 minor->debugfs_root, minor); 242 243 /* Set the size of the vbios since we know it, and it's confusing to 244 * userspace if it wants to seek() but the file has a length of 0 245 */ 246 dentry = debugfs_lookup("vbios.rom", minor->debugfs_root); 247 if (!dentry) 248 return; 249 250 d_inode(dentry)->i_size = drm->vbios.length; 251 dput(dentry); 252 } 253 254 int 255 nouveau_debugfs_init(struct nouveau_drm *drm) 256 { 257 int ret; 258 259 drm->debugfs = kzalloc(sizeof(*drm->debugfs), GFP_KERNEL); 260 if (!drm->debugfs) 261 return -ENOMEM; 262 263 ret = nvif_object_ctor(&drm->client.device.object, "debugfsCtrl", 0, 264 NVIF_CLASS_CONTROL, NULL, 0, 265 &drm->debugfs->ctrl); 266 if (ret) 267 return ret; 268 269 return 0; 270 } 271 272 void 273 nouveau_debugfs_fini(struct nouveau_drm *drm) 274 { 275 if (drm->debugfs && drm->debugfs->ctrl.priv) 276 nvif_object_dtor(&drm->debugfs->ctrl); 277 278 kfree(drm->debugfs); 279 drm->debugfs = NULL; 280 } 281