1 /* 2 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 3 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 4 * Copyright (c) 2009-2010, Code Aurora Forum. 5 * Copyright 2016 Intel Corp. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the next 15 * paragraph) shall be included in all copies or substantial portions of the 16 * Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 24 * OTHER DEALINGS IN THE SOFTWARE. 25 */ 26 27 #ifndef _DRM_DRV_H_ 28 #define _DRM_DRV_H_ 29 30 #include <linux/list.h> 31 #include <linux/irqreturn.h> 32 33 struct drm_device; 34 struct drm_file; 35 struct drm_gem_object; 36 struct drm_master; 37 struct drm_minor; 38 struct dma_buf_attachment; 39 struct drm_display_mode; 40 struct drm_mode_create_dumb; 41 42 /* driver capabilities and requirements mask */ 43 #define DRIVER_USE_AGP 0x1 44 #define DRIVER_LEGACY 0x2 45 #define DRIVER_PCI_DMA 0x8 46 #define DRIVER_SG 0x10 47 #define DRIVER_HAVE_DMA 0x20 48 #define DRIVER_HAVE_IRQ 0x40 49 #define DRIVER_IRQ_SHARED 0x80 50 #define DRIVER_GEM 0x1000 51 #define DRIVER_MODESET 0x2000 52 #define DRIVER_PRIME 0x4000 53 #define DRIVER_RENDER 0x8000 54 #define DRIVER_ATOMIC 0x10000 55 #define DRIVER_KMS_LEGACY_CONTEXT 0x20000 56 57 /** 58 * struct drm_driver - DRM driver structure 59 * 60 * This structure represent the common code for a family of cards. There will 61 * one drm_device for each card present in this family. It contains lots of 62 * vfunc entries, and a pile of those probably should be moved to more 63 * appropriate places like &drm_mode_config_funcs or into a new operations 64 * structure for GEM drivers. 65 */ 66 struct drm_driver { 67 68 /** 69 * @load: 70 * 71 * Backward-compatible driver callback to complete 72 * initialization steps after the driver is registered. For 73 * this reason, may suffer from race conditions and its use is 74 * deprecated for new drivers. It is therefore only supported 75 * for existing drivers not yet converted to the new scheme. 76 * See drm_dev_init() and drm_dev_register() for proper and 77 * race-free way to set up a &struct drm_device. 78 * 79 * Returns: 80 * 81 * Zero on success, non-zero value on failure. 82 */ 83 int (*load) (struct drm_device *, unsigned long flags); 84 int (*firstopen) (struct drm_device *); 85 int (*open) (struct drm_device *, struct drm_file *); 86 void (*preclose) (struct drm_device *, struct drm_file *file_priv); 87 void (*postclose) (struct drm_device *, struct drm_file *); 88 void (*lastclose) (struct drm_device *); 89 90 /** 91 * @unload: 92 * 93 * Reverse the effects of the driver load callback. Ideally, 94 * the clean up performed by the driver should happen in the 95 * reverse order of the initialization. Similarly to the load 96 * hook, this handler is deprecated and its usage should be 97 * dropped in favor of an open-coded teardown function at the 98 * driver layer. See drm_dev_unregister() and drm_dev_unref() 99 * for the proper way to remove a &struct drm_device. 100 * 101 * The unload() hook is called right after unregistering 102 * the device. 103 * 104 */ 105 void (*unload) (struct drm_device *); 106 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv); 107 int (*dma_quiescent) (struct drm_device *); 108 int (*context_dtor) (struct drm_device *dev, int context); 109 int (*set_busid)(struct drm_device *dev, struct drm_master *master); 110 111 /** 112 * @get_vblank_counter: 113 * 114 * Driver callback for fetching a raw hardware vblank counter for the 115 * CRTC specified with the pipe argument. If a device doesn't have a 116 * hardware counter, the driver can simply use 117 * drm_vblank_no_hw_counter() function. The DRM core will account for 118 * missed vblank events while interrupts where disabled based on system 119 * timestamps. 120 * 121 * Wraparound handling and loss of events due to modesetting is dealt 122 * with in the DRM core code, as long as drivers call 123 * drm_crtc_vblank_off() and drm_crtc_vblank_on() when disabling or 124 * enabling a CRTC. 125 * 126 * Returns: 127 * 128 * Raw vblank counter value. 129 */ 130 u32 (*get_vblank_counter) (struct drm_device *dev, unsigned int pipe); 131 132 /** 133 * @enable_vblank: 134 * 135 * Enable vblank interrupts for the CRTC specified with the pipe 136 * argument. 137 * 138 * Returns: 139 * 140 * Zero on success, appropriate errno if the given @crtc's vblank 141 * interrupt cannot be enabled. 142 */ 143 int (*enable_vblank) (struct drm_device *dev, unsigned int pipe); 144 145 /** 146 * @disable_vblank: 147 * 148 * Disable vblank interrupts for the CRTC specified with the pipe 149 * argument. 150 */ 151 void (*disable_vblank) (struct drm_device *dev, unsigned int pipe); 152 153 /** 154 * @get_scanout_position: 155 * 156 * Called by vblank timestamping code. 157 * 158 * Returns the current display scanout position from a crtc, and an 159 * optional accurate ktime_get() timestamp of when position was 160 * measured. Note that this is a helper callback which is only used if a 161 * driver uses drm_calc_vbltimestamp_from_scanoutpos() for the 162 * @get_vblank_timestamp callback. 163 * 164 * Parameters: 165 * 166 * dev: 167 * DRM device. 168 * pipe: 169 * Id of the crtc to query. 170 * flags: 171 * Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0). 172 * vpos: 173 * Target location for current vertical scanout position. 174 * hpos: 175 * Target location for current horizontal scanout position. 176 * stime: 177 * Target location for timestamp taken immediately before 178 * scanout position query. Can be NULL to skip timestamp. 179 * etime: 180 * Target location for timestamp taken immediately after 181 * scanout position query. Can be NULL to skip timestamp. 182 * mode: 183 * Current display timings. 184 * 185 * Returns vpos as a positive number while in active scanout area. 186 * Returns vpos as a negative number inside vblank, counting the number 187 * of scanlines to go until end of vblank, e.g., -1 means "one scanline 188 * until start of active scanout / end of vblank." 189 * 190 * Returns: 191 * 192 * Flags, or'ed together as follows: 193 * 194 * DRM_SCANOUTPOS_VALID: 195 * Query successful. 196 * DRM_SCANOUTPOS_INVBL: 197 * Inside vblank. 198 * DRM_SCANOUTPOS_ACCURATE: Returned position is accurate. A lack of 199 * this flag means that returned position may be offset by a 200 * constant but unknown small number of scanlines wrt. real scanout 201 * position. 202 * 203 */ 204 int (*get_scanout_position) (struct drm_device *dev, unsigned int pipe, 205 unsigned int flags, int *vpos, int *hpos, 206 ktime_t *stime, ktime_t *etime, 207 const struct drm_display_mode *mode); 208 209 /** 210 * @get_vblank_timestamp: 211 * 212 * Called by drm_get_last_vbltimestamp(). Should return a precise 213 * timestamp when the most recent VBLANK interval ended or will end. 214 * 215 * Specifically, the timestamp in @vblank_time should correspond as 216 * closely as possible to the time when the first video scanline of 217 * the video frame after the end of VBLANK will start scanning out, 218 * the time immediately after end of the VBLANK interval. If the 219 * @crtc is currently inside VBLANK, this will be a time in the future. 220 * If the @crtc is currently scanning out a frame, this will be the 221 * past start time of the current scanout. This is meant to adhere 222 * to the OpenML OML_sync_control extension specification. 223 * 224 * Paramters: 225 * 226 * dev: 227 * dev DRM device handle. 228 * pipe: 229 * crtc for which timestamp should be returned. 230 * max_error: 231 * Maximum allowable timestamp error in nanoseconds. 232 * Implementation should strive to provide timestamp 233 * with an error of at most max_error nanoseconds. 234 * Returns true upper bound on error for timestamp. 235 * vblank_time: 236 * Target location for returned vblank timestamp. 237 * flags: 238 * 0 = Defaults, no special treatment needed. 239 * DRM_CALLED_FROM_VBLIRQ = Function is called from vblank 240 * irq handler. Some drivers need to apply some workarounds 241 * for gpu-specific vblank irq quirks if flag is set. 242 * 243 * Returns: 244 * 245 * Zero if timestamping isn't supported in current display mode or a 246 * negative number on failure. A positive status code on success, 247 * which describes how the vblank_time timestamp was computed. 248 */ 249 int (*get_vblank_timestamp) (struct drm_device *dev, unsigned int pipe, 250 int *max_error, 251 struct timeval *vblank_time, 252 unsigned flags); 253 254 /* these have to be filled in */ 255 256 irqreturn_t(*irq_handler) (int irq, void *arg); 257 void (*irq_preinstall) (struct drm_device *dev); 258 int (*irq_postinstall) (struct drm_device *dev); 259 void (*irq_uninstall) (struct drm_device *dev); 260 261 /** 262 * @master_create: 263 * 264 * Called whenever a new master is created. Only used by vmwgfx. 265 */ 266 int (*master_create)(struct drm_device *dev, struct drm_master *master); 267 268 /** 269 * @master_destroy: 270 * 271 * Called whenever a master is destroyed. Only used by vmwgfx. 272 */ 273 void (*master_destroy)(struct drm_device *dev, struct drm_master *master); 274 275 /** 276 * @master_set: 277 * 278 * Called whenever the minor master is set. Only used by vmwgfx. 279 */ 280 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv, 281 bool from_open); 282 /** 283 * @master_drop: 284 * 285 * Called whenever the minor master is dropped. Only used by vmwgfx. 286 */ 287 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv); 288 289 int (*debugfs_init)(struct drm_minor *minor); 290 void (*debugfs_cleanup)(struct drm_minor *minor); 291 292 /** 293 * @gem_free_object: deconstructor for drm_gem_objects 294 * 295 * This is deprecated and should not be used by new drivers. Use 296 * @gem_free_object_unlocked instead. 297 */ 298 void (*gem_free_object) (struct drm_gem_object *obj); 299 300 /** 301 * @gem_free_object_unlocked: deconstructor for drm_gem_objects 302 * 303 * This is for drivers which are not encumbered with &drm_device.struct_mutex 304 * legacy locking schemes. Use this hook instead of @gem_free_object. 305 */ 306 void (*gem_free_object_unlocked) (struct drm_gem_object *obj); 307 308 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *); 309 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *); 310 311 /** 312 * @gem_create_object: constructor for gem objects 313 * 314 * Hook for allocating the GEM object struct, for use by core 315 * helpers. 316 */ 317 struct drm_gem_object *(*gem_create_object)(struct drm_device *dev, 318 size_t size); 319 320 /* prime: */ 321 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */ 322 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv, 323 uint32_t handle, uint32_t flags, int *prime_fd); 324 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */ 325 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv, 326 int prime_fd, uint32_t *handle); 327 /* export GEM -> dmabuf */ 328 struct dma_buf * (*gem_prime_export)(struct drm_device *dev, 329 struct drm_gem_object *obj, int flags); 330 /* import dmabuf -> GEM */ 331 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev, 332 struct dma_buf *dma_buf); 333 /* low-level interface used by drm_gem_prime_{import,export} */ 334 int (*gem_prime_pin)(struct drm_gem_object *obj); 335 void (*gem_prime_unpin)(struct drm_gem_object *obj); 336 struct reservation_object * (*gem_prime_res_obj)( 337 struct drm_gem_object *obj); 338 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj); 339 struct drm_gem_object *(*gem_prime_import_sg_table)( 340 struct drm_device *dev, 341 struct dma_buf_attachment *attach, 342 struct sg_table *sgt); 343 void *(*gem_prime_vmap)(struct drm_gem_object *obj); 344 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr); 345 int (*gem_prime_mmap)(struct drm_gem_object *obj, 346 struct vm_area_struct *vma); 347 348 /** 349 * @dumb_create: 350 * 351 * This creates a new dumb buffer in the driver's backing storage manager (GEM, 352 * TTM or something else entirely) and returns the resulting buffer handle. This 353 * handle can then be wrapped up into a framebuffer modeset object. 354 * 355 * Note that userspace is not allowed to use such objects for render 356 * acceleration - drivers must create their own private ioctls for such a use 357 * case. 358 * 359 * Width, height and depth are specified in the &drm_mode_create_dumb 360 * argument. The callback needs to fill the handle, pitch and size for 361 * the created buffer. 362 * 363 * Called by the user via ioctl. 364 * 365 * Returns: 366 * 367 * Zero on success, negative errno on failure. 368 */ 369 int (*dumb_create)(struct drm_file *file_priv, 370 struct drm_device *dev, 371 struct drm_mode_create_dumb *args); 372 /** 373 * @dumb_map_offset: 374 * 375 * Allocate an offset in the drm device node's address space to be able to 376 * memory map a dumb buffer. GEM-based drivers must use 377 * drm_gem_create_mmap_offset() to implement this. 378 * 379 * Called by the user via ioctl. 380 * 381 * Returns: 382 * 383 * Zero on success, negative errno on failure. 384 */ 385 int (*dumb_map_offset)(struct drm_file *file_priv, 386 struct drm_device *dev, uint32_t handle, 387 uint64_t *offset); 388 /** 389 * @dumb_destroy: 390 * 391 * This destroys the userspace handle for the given dumb backing storage buffer. 392 * Since buffer objects must be reference counted in the kernel a buffer object 393 * won't be immediately freed if a framebuffer modeset object still uses it. 394 * 395 * Called by the user via ioctl. 396 * 397 * Returns: 398 * 399 * Zero on success, negative errno on failure. 400 */ 401 int (*dumb_destroy)(struct drm_file *file_priv, 402 struct drm_device *dev, 403 uint32_t handle); 404 405 /* Driver private ops for this object */ 406 const struct vm_operations_struct *gem_vm_ops; 407 408 int major; 409 int minor; 410 int patchlevel; 411 char *name; 412 char *desc; 413 char *date; 414 415 u32 driver_features; 416 int dev_priv_size; 417 const struct drm_ioctl_desc *ioctls; 418 int num_ioctls; 419 const struct file_operations *fops; 420 421 /* List of devices hanging off this driver with stealth attach. */ 422 struct list_head legacy_dev_list; 423 }; 424 425 extern __printf(6, 7) 426 void drm_dev_printk(const struct device *dev, const char *level, 427 unsigned int category, const char *function_name, 428 const char *prefix, const char *format, ...); 429 extern __printf(3, 4) 430 void drm_printk(const char *level, unsigned int category, 431 const char *format, ...); 432 extern unsigned int drm_debug; 433 434 int drm_dev_init(struct drm_device *dev, 435 struct drm_driver *driver, 436 struct device *parent); 437 struct drm_device *drm_dev_alloc(struct drm_driver *driver, 438 struct device *parent); 439 int drm_dev_register(struct drm_device *dev, unsigned long flags); 440 void drm_dev_unregister(struct drm_device *dev); 441 442 void drm_dev_ref(struct drm_device *dev); 443 void drm_dev_unref(struct drm_device *dev); 444 void drm_put_dev(struct drm_device *dev); 445 void drm_unplug_dev(struct drm_device *dev); 446 447 int drm_dev_set_unique(struct drm_device *dev, const char *name); 448 449 450 #endif 451