1 /*- 2 * Copyright (c) 2010 Isilon Systems, Inc. 3 * Copyright (c) 2010 iX Systems, Inc. 4 * Copyright (c) 2010 Panasas, Inc. 5 * Copyright (c) 2013, 2014 Mellanox Technologies, Ltd. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice unmodified, this list of conditions, and the following 13 * disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * $FreeBSD$ 30 */ 31 #ifndef _LINUX_DEVICE_H_ 32 #define _LINUX_DEVICE_H_ 33 34 #include <linux/types.h> 35 #include <linux/kobject.h> 36 #include <linux/sysfs.h> 37 #include <linux/list.h> 38 #include <linux/compiler.h> 39 #include <linux/types.h> 40 #include <linux/module.h> 41 #include <linux/workqueue.h> 42 #include <linux/sysfs.h> 43 #include <linux/kdev_t.h> 44 #include <asm/atomic.h> 45 46 #include <sys/bus.h> 47 48 enum irqreturn { IRQ_NONE = 0, IRQ_HANDLED, IRQ_WAKE_THREAD, }; 49 typedef enum irqreturn irqreturn_t; 50 51 struct class { 52 const char *name; 53 struct module *owner; 54 struct kobject kobj; 55 devclass_t bsdclass; 56 void (*class_release)(struct class *class); 57 void (*dev_release)(struct device *dev); 58 char * (*devnode)(struct device *dev, umode_t *mode); 59 }; 60 61 struct device { 62 struct device *parent; 63 struct list_head irqents; 64 device_t bsddev; 65 dev_t devt; 66 struct class *class; 67 void (*release)(struct device *dev); 68 struct kobject kobj; 69 uint64_t *dma_mask; 70 void *driver_data; 71 unsigned int irq; 72 unsigned int msix; 73 unsigned int msix_max; 74 }; 75 76 extern struct device linux_root_device; 77 extern struct kobject linux_class_root; 78 extern const struct kobj_type linux_dev_ktype; 79 extern const struct kobj_type linux_class_ktype; 80 81 struct class_attribute { 82 struct attribute attr; 83 ssize_t (*show)(struct class *, struct class_attribute *, char *); 84 ssize_t (*store)(struct class *, struct class_attribute *, const char *, size_t); 85 const void *(*namespace)(struct class *, const struct class_attribute *); 86 }; 87 88 #define CLASS_ATTR(_name, _mode, _show, _store) \ 89 struct class_attribute class_attr_##_name = \ 90 { { #_name, NULL, _mode }, _show, _store } 91 92 struct device_attribute { 93 struct attribute attr; 94 ssize_t (*show)(struct device *, 95 struct device_attribute *, char *); 96 ssize_t (*store)(struct device *, 97 struct device_attribute *, const char *, 98 size_t); 99 }; 100 101 #define DEVICE_ATTR(_name, _mode, _show, _store) \ 102 struct device_attribute dev_attr_##_name = \ 103 { { #_name, NULL, _mode }, _show, _store } 104 105 /* Simple class attribute that is just a static string */ 106 struct class_attribute_string { 107 struct class_attribute attr; 108 char *str; 109 }; 110 111 static inline ssize_t 112 show_class_attr_string(struct class *class, 113 struct class_attribute *attr, char *buf) 114 { 115 struct class_attribute_string *cs; 116 cs = container_of(attr, struct class_attribute_string, attr); 117 return snprintf(buf, PAGE_SIZE, "%s\n", cs->str); 118 } 119 120 /* Currently read-only only */ 121 #define _CLASS_ATTR_STRING(_name, _mode, _str) \ 122 { __ATTR(_name, _mode, show_class_attr_string, NULL), _str } 123 #define CLASS_ATTR_STRING(_name, _mode, _str) \ 124 struct class_attribute_string class_attr_##_name = \ 125 _CLASS_ATTR_STRING(_name, _mode, _str) 126 127 #define dev_err(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 128 #define dev_warn(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 129 #define dev_info(dev, fmt, ...) device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 130 #define dev_printk(lvl, dev, fmt, ...) \ 131 device_printf((dev)->bsddev, fmt, ##__VA_ARGS__) 132 133 static inline void * 134 dev_get_drvdata(struct device *dev) 135 { 136 137 return dev->driver_data; 138 } 139 140 static inline void 141 dev_set_drvdata(struct device *dev, void *data) 142 { 143 144 dev->driver_data = data; 145 } 146 147 static inline struct device * 148 get_device(struct device *dev) 149 { 150 151 if (dev) 152 kobject_get(&dev->kobj); 153 154 return (dev); 155 } 156 157 static inline char * 158 dev_name(const struct device *dev) 159 { 160 161 return kobject_name(&dev->kobj); 162 } 163 164 #define dev_set_name(_dev, _fmt, ...) \ 165 kobject_set_name(&(_dev)->kobj, (_fmt), ##__VA_ARGS__) 166 167 static inline void 168 put_device(struct device *dev) 169 { 170 171 if (dev) 172 kobject_put(&dev->kobj); 173 } 174 175 static inline int 176 class_register(struct class *class) 177 { 178 179 class->bsdclass = devclass_create(class->name); 180 kobject_init(&class->kobj, &linux_class_ktype); 181 kobject_set_name(&class->kobj, class->name); 182 kobject_add(&class->kobj, &linux_class_root, class->name); 183 184 return (0); 185 } 186 187 static inline void 188 class_unregister(struct class *class) 189 { 190 191 kobject_put(&class->kobj); 192 } 193 194 /* 195 * Devices are registered and created for exporting to sysfs. create 196 * implies register and register assumes the device fields have been 197 * setup appropriately before being called. 198 */ 199 static inline int 200 device_register(struct device *dev) 201 { 202 device_t bsddev; 203 int unit; 204 205 bsddev = NULL; 206 if (dev->devt) { 207 unit = MINOR(dev->devt); 208 bsddev = devclass_get_device(dev->class->bsdclass, unit); 209 } else 210 unit = -1; 211 if (bsddev == NULL) 212 bsddev = device_add_child(dev->parent->bsddev, 213 dev->class->kobj.name, unit); 214 if (bsddev) { 215 if (dev->devt == 0) 216 dev->devt = makedev(0, device_get_unit(bsddev)); 217 device_set_softc(bsddev, dev); 218 } 219 dev->bsddev = bsddev; 220 kobject_init(&dev->kobj, &linux_dev_ktype); 221 kobject_add(&dev->kobj, &dev->class->kobj, dev_name(dev)); 222 223 return (0); 224 } 225 226 static inline void 227 device_unregister(struct device *dev) 228 { 229 device_t bsddev; 230 231 bsddev = dev->bsddev; 232 mtx_lock(&Giant); 233 if (bsddev) 234 device_delete_child(device_get_parent(bsddev), bsddev); 235 mtx_unlock(&Giant); 236 put_device(dev); 237 } 238 239 struct device *device_create(struct class *class, struct device *parent, 240 dev_t devt, void *drvdata, const char *fmt, ...); 241 242 static inline void 243 device_destroy(struct class *class, dev_t devt) 244 { 245 device_t bsddev; 246 int unit; 247 248 unit = MINOR(devt); 249 bsddev = devclass_get_device(class->bsdclass, unit); 250 if (bsddev) 251 device_unregister(device_get_softc(bsddev)); 252 } 253 254 static inline void 255 linux_class_kfree(struct class *class) 256 { 257 258 kfree(class); 259 } 260 261 static inline struct class * 262 class_create(struct module *owner, const char *name) 263 { 264 struct class *class; 265 int error; 266 267 class = kzalloc(sizeof(*class), M_WAITOK); 268 class->owner = owner; 269 class->name= name; 270 class->class_release = linux_class_kfree; 271 error = class_register(class); 272 if (error) { 273 kfree(class); 274 return (NULL); 275 } 276 277 return (class); 278 } 279 280 static inline void 281 class_destroy(struct class *class) 282 { 283 284 if (class == NULL) 285 return; 286 class_unregister(class); 287 } 288 289 static inline int 290 device_create_file(struct device *dev, const struct device_attribute *attr) 291 { 292 293 if (dev) 294 return sysfs_create_file(&dev->kobj, &attr->attr); 295 return -EINVAL; 296 } 297 298 static inline void 299 device_remove_file(struct device *dev, const struct device_attribute *attr) 300 { 301 302 if (dev) 303 sysfs_remove_file(&dev->kobj, &attr->attr); 304 } 305 306 static inline int 307 class_create_file(struct class *class, const struct class_attribute *attr) 308 { 309 310 if (class) 311 return sysfs_create_file(&class->kobj, &attr->attr); 312 return -EINVAL; 313 } 314 315 static inline void 316 class_remove_file(struct class *class, const struct class_attribute *attr) 317 { 318 319 if (class) 320 sysfs_remove_file(&class->kobj, &attr->attr); 321 } 322 323 static inline int 324 dev_to_node(struct device *dev) 325 { 326 return -1; 327 } 328 329 char *kvasprintf(gfp_t, const char *, va_list); 330 char *kasprintf(gfp_t, const char *, ...); 331 332 #endif /* _LINUX_DEVICE_H_ */ 333