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 return ret; 59 60 seq_printf(m, "0x%08x\n", 61 nvif_rd32(&drm->client.device.object, 0x101000)); 62 63 pm_runtime_mark_last_busy(drm->dev->dev); 64 pm_runtime_put_autosuspend(drm->dev->dev); 65 66 return 0; 67 } 68 69 static int 70 nouveau_debugfs_pstate_get(struct seq_file *m, void *data) 71 { 72 struct drm_device *drm = m->private; 73 struct nouveau_debugfs *debugfs = nouveau_debugfs(drm); 74 struct nvif_object *ctrl = &debugfs->ctrl; 75 struct nvif_control_pstate_info_v0 info = {}; 76 int ret, i; 77 78 if (!debugfs) 79 return -ENODEV; 80 81 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_INFO, &info, sizeof(info)); 82 if (ret) 83 return ret; 84 85 for (i = 0; i < info.count + 1; i++) { 86 const s32 state = i < info.count ? i : 87 NVIF_CONTROL_PSTATE_ATTR_V0_STATE_CURRENT; 88 struct nvif_control_pstate_attr_v0 attr = { 89 .state = state, 90 .index = 0, 91 }; 92 93 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR, 94 &attr, sizeof(attr)); 95 if (ret) 96 return ret; 97 98 if (i < info.count) 99 seq_printf(m, "%02x:", attr.state); 100 else 101 seq_printf(m, "%s:", info.pwrsrc == 0 ? "DC" : 102 info.pwrsrc == 1 ? "AC" : "--"); 103 104 attr.index = 0; 105 do { 106 attr.state = state; 107 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_ATTR, 108 &attr, sizeof(attr)); 109 if (ret) 110 return ret; 111 112 seq_printf(m, " %s %d", attr.name, attr.min); 113 if (attr.min != attr.max) 114 seq_printf(m, "-%d", attr.max); 115 seq_printf(m, " %s", attr.unit); 116 } while (attr.index); 117 118 if (state >= 0) { 119 if (info.ustate_ac == state) 120 seq_printf(m, " AC"); 121 if (info.ustate_dc == state) 122 seq_printf(m, " DC"); 123 if (info.pstate == state) 124 seq_printf(m, " *"); 125 } else { 126 if (info.ustate_ac < -1) 127 seq_printf(m, " AC"); 128 if (info.ustate_dc < -1) 129 seq_printf(m, " DC"); 130 } 131 132 seq_printf(m, "\n"); 133 } 134 135 return 0; 136 } 137 138 static ssize_t 139 nouveau_debugfs_pstate_set(struct file *file, const char __user *ubuf, 140 size_t len, loff_t *offp) 141 { 142 struct seq_file *m = file->private_data; 143 struct drm_device *drm = m->private; 144 struct nouveau_debugfs *debugfs = nouveau_debugfs(drm); 145 struct nvif_object *ctrl = &debugfs->ctrl; 146 struct nvif_control_pstate_user_v0 args = { .pwrsrc = -EINVAL }; 147 char buf[32] = {}, *tmp, *cur = buf; 148 long value, ret; 149 150 if (!debugfs) 151 return -ENODEV; 152 153 if (len >= sizeof(buf)) 154 return -EINVAL; 155 156 if (copy_from_user(buf, ubuf, len)) 157 return -EFAULT; 158 159 if ((tmp = strchr(buf, '\n'))) 160 *tmp = '\0'; 161 162 if (!strncasecmp(cur, "dc:", 3)) { 163 args.pwrsrc = 0; 164 cur += 3; 165 } else 166 if (!strncasecmp(cur, "ac:", 3)) { 167 args.pwrsrc = 1; 168 cur += 3; 169 } 170 171 if (!strcasecmp(cur, "none")) 172 args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_UNKNOWN; 173 else 174 if (!strcasecmp(cur, "auto")) 175 args.ustate = NVIF_CONTROL_PSTATE_USER_V0_STATE_PERFMON; 176 else { 177 ret = kstrtol(cur, 16, &value); 178 if (ret) 179 return ret; 180 args.ustate = value; 181 } 182 183 ret = pm_runtime_get_sync(drm->dev); 184 if (ret < 0 && ret != -EACCES) 185 return ret; 186 ret = nvif_mthd(ctrl, NVIF_CONTROL_PSTATE_USER, &args, sizeof(args)); 187 pm_runtime_put_autosuspend(drm->dev); 188 if (ret < 0) 189 return ret; 190 191 return len; 192 } 193 194 static int 195 nouveau_debugfs_pstate_open(struct inode *inode, struct file *file) 196 { 197 return single_open(file, nouveau_debugfs_pstate_get, inode->i_private); 198 } 199 200 static const struct file_operations nouveau_pstate_fops = { 201 .owner = THIS_MODULE, 202 .open = nouveau_debugfs_pstate_open, 203 .read = seq_read, 204 .write = nouveau_debugfs_pstate_set, 205 }; 206 207 static struct drm_info_list nouveau_debugfs_list[] = { 208 { "vbios.rom", nouveau_debugfs_vbios_image, 0, NULL }, 209 { "strap_peek", nouveau_debugfs_strap_peek, 0, NULL }, 210 }; 211 #define NOUVEAU_DEBUGFS_ENTRIES ARRAY_SIZE(nouveau_debugfs_list) 212 213 static const struct nouveau_debugfs_files { 214 const char *name; 215 const struct file_operations *fops; 216 } nouveau_debugfs_files[] = { 217 {"pstate", &nouveau_pstate_fops}, 218 }; 219 220 int 221 nouveau_drm_debugfs_init(struct drm_minor *minor) 222 { 223 struct nouveau_drm *drm = nouveau_drm(minor->dev); 224 struct dentry *dentry; 225 int i, ret; 226 227 for (i = 0; i < ARRAY_SIZE(nouveau_debugfs_files); i++) { 228 dentry = debugfs_create_file(nouveau_debugfs_files[i].name, 229 S_IRUGO | S_IWUSR, 230 minor->debugfs_root, minor->dev, 231 nouveau_debugfs_files[i].fops); 232 if (!dentry) 233 return -ENOMEM; 234 } 235 236 ret = drm_debugfs_create_files(nouveau_debugfs_list, 237 NOUVEAU_DEBUGFS_ENTRIES, 238 minor->debugfs_root, minor); 239 if (ret) 240 return ret; 241 242 /* Set the size of the vbios since we know it, and it's confusing to 243 * userspace if it wants to seek() but the file has a length of 0 244 */ 245 dentry = debugfs_lookup("vbios.rom", minor->debugfs_root); 246 if (!dentry) 247 return 0; 248 249 d_inode(dentry)->i_size = drm->vbios.length; 250 dput(dentry); 251 252 return 0; 253 } 254 255 int 256 nouveau_debugfs_init(struct nouveau_drm *drm) 257 { 258 int ret; 259 260 drm->debugfs = kzalloc(sizeof(*drm->debugfs), GFP_KERNEL); 261 if (!drm->debugfs) 262 return -ENOMEM; 263 264 ret = nvif_object_init(&drm->client.device.object, 0, 265 NVIF_CLASS_CONTROL, NULL, 0, 266 &drm->debugfs->ctrl); 267 if (ret) 268 return ret; 269 270 return 0; 271 } 272 273 void 274 nouveau_debugfs_fini(struct nouveau_drm *drm) 275 { 276 if (drm->debugfs && drm->debugfs->ctrl.priv) 277 nvif_object_fini(&drm->debugfs->ctrl); 278 279 kfree(drm->debugfs); 280 drm->debugfs = NULL; 281 } 282