3 * Private header for Direct Rendering Manager
5 * \author Rickard E. (Rik) Faith <faith@valinux.com>
6 * \author Gareth Hughes <gareth@valinux.com>
10 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
11 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
12 * Copyright (c) 2009-2010, Code Aurora Forum.
13 * All rights reserved.
15 * Permission is hereby granted, free of charge, to any person obtaining a
16 * copy of this software and associated documentation files (the "Software"),
17 * to deal in the Software without restriction, including without limitation
18 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
19 * and/or sell copies of the Software, and to permit persons to whom the
20 * Software is furnished to do so, subject to the following conditions:
22 * The above copyright notice and this permission notice (including the next
23 * paragraph) shall be included in all copies or substantial portions of the
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
27 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
28 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
29 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
30 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
31 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
32 * OTHER DEALINGS IN THE SOFTWARE.
40 /* add include of current.h so that "current" is defined
41 * before static inline funcs in wait.h. Doing this so we
42 * can build the DRM (part of PI DRI). 4/21/2000 S + B */
43 #include <asm/current.h>
44 #endif /* __alpha__ */
45 #include <linux/kernel.h>
46 #include <linux/miscdevice.h>
48 #include <linux/init.h>
49 #include <linux/file.h>
50 #include <linux/platform_device.h>
51 #include <linux/pci.h>
52 #include <linux/jiffies.h>
53 #include <linux/dma-mapping.h>
55 #include <linux/cdev.h>
56 #include <linux/mutex.h>
58 #include <linux/slab.h>
59 #if defined(__alpha__) || defined(__powerpc__)
60 #include <asm/pgtable.h> /* For pte_wrprotect */
63 #include <asm/uaccess.h>
64 #include <linux/types.h>
65 #include <linux/agp_backend.h>
66 #include <linux/workqueue.h>
67 #include <linux/poll.h>
68 #include <asm/pgalloc.h>
70 #include <drm/drm_sarea.h>
71 #include <drm/drm_vma_manager.h>
73 #include <linux/idr.h>
75 #define __OS_HAS_AGP (defined(CONFIG_AGP) || (defined(CONFIG_AGP_MODULE) && defined(MODULE)))
85 #include <drm/drm_os_linux.h>
86 #include <drm/drm_hashtab.h>
87 #include <drm/drm_mm.h>
89 #define DRM_UT_CORE 0x01
90 #define DRM_UT_DRIVER 0x02
91 #define DRM_UT_KMS 0x04
92 #define DRM_UT_PRIME 0x08
94 * Three debug levels are defined.
95 * drm_core, drm_driver, drm_kms
96 * drm_core level can be used in the generic drm code. For example:
97 * drm_ioctl, drm_mm, drm_memory
98 * The macro definition of DRM_DEBUG is used.
99 * DRM_DEBUG(fmt, args...)
100 * The debug info by using the DRM_DEBUG can be obtained by adding
101 * the boot option of "drm.debug=1".
103 * drm_driver level can be used in the specific drm driver. It is used
104 * to add the debug info related with the drm driver. For example:
105 * i915_drv, i915_dma, i915_gem, radeon_drv,
106 * The macro definition of DRM_DEBUG_DRIVER can be used.
107 * DRM_DEBUG_DRIVER(fmt, args...)
108 * The debug info by using the DRM_DEBUG_DRIVER can be obtained by
109 * adding the boot option of "drm.debug=0x02"
111 * drm_kms level can be used in the KMS code related with specific drm driver.
112 * It is used to add the debug info related with KMS mode. For example:
113 * the connector/crtc ,
114 * The macro definition of DRM_DEBUG_KMS can be used.
115 * DRM_DEBUG_KMS(fmt, args...)
116 * The debug info by using the DRM_DEBUG_KMS can be obtained by
117 * adding the boot option of "drm.debug=0x04"
119 * If we add the boot option of "drm.debug=0x06", we can get the debug info by
120 * using the DRM_DEBUG_KMS and DRM_DEBUG_DRIVER.
121 * If we add the boot option of "drm.debug=0x05", we can get the debug info by
122 * using the DRM_DEBUG_KMS and DRM_DEBUG.
125 extern __printf(4, 5)
126 void drm_ut_debug_printk(unsigned int request_level,
128 const char *function_name,
129 const char *format, ...);
130 extern __printf(2, 3)
131 int drm_err(const char *func, const char *format, ...);
133 /***********************************************************************/
134 /** \name DRM template customization defaults */
137 /* driver capabilities and requirements mask */
138 #define DRIVER_USE_AGP 0x1
139 #define DRIVER_REQUIRE_AGP 0x2
140 #define DRIVER_PCI_DMA 0x8
141 #define DRIVER_SG 0x10
142 #define DRIVER_HAVE_DMA 0x20
143 #define DRIVER_HAVE_IRQ 0x40
144 #define DRIVER_IRQ_SHARED 0x80
145 #define DRIVER_GEM 0x1000
146 #define DRIVER_MODESET 0x2000
147 #define DRIVER_PRIME 0x4000
148 #define DRIVER_RENDER 0x8000
150 #define DRIVER_BUS_PCI 0x1
151 #define DRIVER_BUS_PLATFORM 0x2
152 #define DRIVER_BUS_USB 0x3
153 #define DRIVER_BUS_HOST1X 0x4
155 /***********************************************************************/
156 /** \name Begin the DRM... */
159 #define DRM_DEBUG_CODE 2 /**< Include debugging code if > 1, then
160 also include looping detection. */
162 #define DRM_MAGIC_HASH_ORDER 4 /**< Size of key hash table. Must be power of 2. */
163 #define DRM_KERNEL_CONTEXT 0 /**< Change drm_resctx if changed */
164 #define DRM_RESERVED_CONTEXTS 1 /**< Change drm_resctx if changed */
166 #define DRM_MAP_HASH_OFFSET 0x10000000
170 /***********************************************************************/
171 /** \name Macros to make printk easier */
177 * \param fmt printf() like format string.
178 * \param arg arguments
180 #define DRM_ERROR(fmt, ...) \
181 drm_err(__func__, fmt, ##__VA_ARGS__)
183 #define DRM_INFO(fmt, ...) \
184 printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
189 * \param fmt printf() like format string.
190 * \param arg arguments
193 #define DRM_DEBUG(fmt, args...) \
195 drm_ut_debug_printk(DRM_UT_CORE, DRM_NAME, \
196 __func__, fmt, ##args); \
199 #define DRM_DEBUG_DRIVER(fmt, args...) \
201 drm_ut_debug_printk(DRM_UT_DRIVER, DRM_NAME, \
202 __func__, fmt, ##args); \
204 #define DRM_DEBUG_KMS(fmt, args...) \
206 drm_ut_debug_printk(DRM_UT_KMS, DRM_NAME, \
207 __func__, fmt, ##args); \
209 #define DRM_DEBUG_PRIME(fmt, args...) \
211 drm_ut_debug_printk(DRM_UT_PRIME, DRM_NAME, \
212 __func__, fmt, ##args); \
214 #define DRM_LOG(fmt, args...) \
216 drm_ut_debug_printk(DRM_UT_CORE, NULL, \
217 NULL, fmt, ##args); \
219 #define DRM_LOG_KMS(fmt, args...) \
221 drm_ut_debug_printk(DRM_UT_KMS, NULL, \
222 NULL, fmt, ##args); \
224 #define DRM_LOG_MODE(fmt, args...) \
226 drm_ut_debug_printk(DRM_UT_MODE, NULL, \
227 NULL, fmt, ##args); \
229 #define DRM_LOG_DRIVER(fmt, args...) \
231 drm_ut_debug_printk(DRM_UT_DRIVER, NULL, \
232 NULL, fmt, ##args); \
235 #define DRM_DEBUG_DRIVER(fmt, args...) do { } while (0)
236 #define DRM_DEBUG_KMS(fmt, args...) do { } while (0)
237 #define DRM_DEBUG_PRIME(fmt, args...) do { } while (0)
238 #define DRM_DEBUG(fmt, arg...) do { } while (0)
239 #define DRM_LOG(fmt, arg...) do { } while (0)
240 #define DRM_LOG_KMS(fmt, args...) do { } while (0)
241 #define DRM_LOG_MODE(fmt, arg...) do { } while (0)
242 #define DRM_LOG_DRIVER(fmt, arg...) do { } while (0)
248 /***********************************************************************/
249 /** \name Internal types and structures */
252 #define DRM_ARRAY_SIZE(x) ARRAY_SIZE(x)
254 #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
257 * Test that the hardware lock is held by the caller, returning otherwise.
259 * \param dev DRM device.
260 * \param filp file pointer of the caller.
262 #define LOCK_TEST_WITH_RETURN( dev, _file_priv ) \
264 if (!_DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock) || \
265 _file_priv->master->lock.file_priv != _file_priv) { \
266 DRM_ERROR( "%s called without lock held, held %d owner %p %p\n",\
267 __func__, _DRM_LOCK_IS_HELD(_file_priv->master->lock.hw_lock->lock),\
268 _file_priv->master->lock.file_priv, _file_priv); \
274 * Ioctl function type.
276 * \param inode device inode.
277 * \param file_priv DRM file private pointer.
278 * \param cmd command.
279 * \param arg argument.
281 typedef int drm_ioctl_t(struct drm_device *dev, void *data,
282 struct drm_file *file_priv);
284 typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
287 #define DRM_IOCTL_NR(n) _IOC_NR(n)
288 #define DRM_MAJOR 226
291 #define DRM_MASTER 0x2
292 #define DRM_ROOT_ONLY 0x4
293 #define DRM_CONTROL_ALLOW 0x8
294 #define DRM_UNLOCKED 0x10
295 #define DRM_RENDER_ALLOW 0x20
297 struct drm_ioctl_desc {
301 unsigned int cmd_drv;
306 * Creates a driver or general drm_ioctl_desc array entry for the given
307 * ioctl, for use by drm_ioctl().
310 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
311 [DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl, .name = #ioctl}
313 struct drm_magic_entry {
314 struct list_head head;
315 struct drm_hash_item hash_item;
316 struct drm_file *priv;
319 struct drm_vma_entry {
320 struct list_head head;
321 struct vm_area_struct *vma;
329 int idx; /**< Index into master buflist */
330 int total; /**< Buffer size */
331 int order; /**< log-base-2(total) */
332 int used; /**< Amount of buffer in use (for DMA) */
333 unsigned long offset; /**< Byte offset (used internally) */
334 void *address; /**< Address of buffer */
335 unsigned long bus_address; /**< Bus address of buffer */
336 struct drm_buf *next; /**< Kernel-only: used for free list */
337 __volatile__ int waiting; /**< On kernel DMA queue */
338 __volatile__ int pending; /**< On hardware DMA queue */
339 struct drm_file *file_priv; /**< Private of holding file descr */
340 int context; /**< Kernel queue for this buffer */
341 int while_locked; /**< Dispatch this buffer while locked */
349 } list; /**< Which list we're on */
351 int dev_priv_size; /**< Size of buffer private storage */
352 void *dev_private; /**< Per-buffer private storage */
355 /** bufs is one longer than it has to be */
356 struct drm_waitlist {
357 int count; /**< Number of possible buffers */
358 struct drm_buf **bufs; /**< List of pointers to buffers */
359 struct drm_buf **rp; /**< Read pointer */
360 struct drm_buf **wp; /**< Write pointer */
361 struct drm_buf **end; /**< End pointer */
362 spinlock_t read_lock;
363 spinlock_t write_lock;
366 struct drm_freelist {
367 int initialized; /**< Freelist in use */
368 atomic_t count; /**< Number of free buffers */
369 struct drm_buf *next; /**< End pointer */
371 wait_queue_head_t waiting; /**< Processes waiting on free bufs */
372 int low_mark; /**< Low water mark */
373 int high_mark; /**< High water mark */
374 atomic_t wfh; /**< If waiting for high mark */
378 typedef struct drm_dma_handle {
385 * Buffer entry. There is one of this for each buffer size order.
387 struct drm_buf_entry {
388 int buf_size; /**< size */
389 int buf_count; /**< number of buffers */
390 struct drm_buf *buflist; /**< buffer list */
393 struct drm_dma_handle **seglist;
395 struct drm_freelist freelist;
398 /* Event queued up for userspace to read */
399 struct drm_pending_event {
400 struct drm_event *event;
401 struct list_head link;
402 struct drm_file *file_priv;
403 pid_t pid; /* pid of requester, no guarantee it's valid by the time
404 we deliver the event, for tracing only */
405 void (*destroy)(struct drm_pending_event *event);
408 /* initial implementaton using a linked list - todo hashtab */
409 struct drm_prime_file_private {
410 struct list_head head;
414 /** File private data */
416 int always_authenticated;
421 unsigned long ioctl_count;
422 struct list_head lhead;
423 struct drm_minor *minor;
424 unsigned long lock_count;
426 /** Mapping of mm object handles to object pointers. */
427 struct idr object_idr;
428 /** Lock for synchronization of access to object_idr. */
429 spinlock_t table_lock;
434 int is_master; /* this file private is a master for a minor */
435 struct drm_master *master; /* master this node is currently associated with
436 N.B. not always minor->master */
438 /* true when the client has asked us to expose stereo 3D mode flags */
442 * fbs - List of framebuffers associated with this file.
444 * Protected by fbs_lock. Note that the fbs list holds a reference on
445 * the fb object to prevent it from untimely disappearing.
447 struct list_head fbs;
448 struct mutex fbs_lock;
450 wait_queue_head_t event_wait;
451 struct list_head event_list;
454 struct drm_prime_file_private prime;
459 atomic_t use_count; /**< Outstanding uses (+1) */
460 atomic_t finalization; /**< Finalization in progress */
461 atomic_t block_count; /**< Count of processes waiting */
462 atomic_t block_read; /**< Queue blocked for reads */
463 wait_queue_head_t read_queue; /**< Processes waiting on block_read */
464 atomic_t block_write; /**< Queue blocked for writes */
465 wait_queue_head_t write_queue; /**< Processes waiting on block_write */
466 atomic_t total_queued; /**< Total queued statistic */
467 atomic_t total_flushed; /**< Total flushes statistic */
468 atomic_t total_locks; /**< Total locks statistics */
469 enum drm_ctx_flags flags; /**< Context preserving and 2D-only */
470 struct drm_waitlist waitlist; /**< Pending buffers */
471 wait_queue_head_t flush_queue; /**< Processes waiting until flush */
477 struct drm_lock_data {
478 struct drm_hw_lock *hw_lock; /**< Hardware lock */
479 /** Private of lock holder's file (NULL=kernel) */
480 struct drm_file *file_priv;
481 wait_queue_head_t lock_queue; /**< Queue of blocked processes */
482 unsigned long lock_time; /**< Time of last lock in jiffies */
484 uint32_t kernel_waiters;
485 uint32_t user_waiters;
492 struct drm_device_dma {
494 struct drm_buf_entry bufs[DRM_MAX_ORDER + 1]; /**< buffers, grouped by their size order */
495 int buf_count; /**< total number of buffers */
496 struct drm_buf **buflist; /**< Vector of pointers into drm_device_dma::bufs */
498 int page_count; /**< number of pages */
499 unsigned long *pagelist; /**< page list */
500 unsigned long byte_count;
502 _DRM_DMA_USE_AGP = 0x01,
503 _DRM_DMA_USE_SG = 0x02,
504 _DRM_DMA_USE_FB = 0x04,
505 _DRM_DMA_USE_PCI_RO = 0x08
511 * AGP memory entry. Stored as a doubly linked list.
514 unsigned long handle; /**< handle */
516 unsigned long bound; /**< address */
518 struct list_head head;
524 * \sa drm_agp_init() and drm_device::agp.
526 struct drm_agp_head {
527 DRM_AGP_KERN agp_info; /**< AGP device information */
528 struct list_head memory;
529 unsigned long mode; /**< AGP mode */
530 struct agp_bridge_data *bridge;
531 int enabled; /**< whether the AGP bus as been enabled */
532 int acquired; /**< whether the AGP device has been acquired */
535 int cant_use_aperture;
536 unsigned long page_mask;
540 * Scatter-gather memory.
543 unsigned long handle;
546 struct page **pagelist;
552 struct drm_hw_lock *lock;
557 * Kernel side of a mapping
559 struct drm_local_map {
560 resource_size_t offset; /**< Requested physical address (0 for SAREA)*/
561 unsigned long size; /**< Requested physical size (bytes) */
562 enum drm_map_type type; /**< Type of memory to map */
563 enum drm_map_flags flags; /**< Flags */
564 void *handle; /**< User-space: "Handle" to pass to mmap() */
565 /**< Kernel-space: kernel-virtual address */
566 int mtrr; /**< MTRR slot used */
569 typedef struct drm_local_map drm_local_map_t;
574 struct drm_map_list {
575 struct list_head head; /**< list head */
576 struct drm_hash_item hash;
577 struct drm_local_map *map; /**< mapping */
579 struct drm_master *master;
583 * Context handle list
585 struct drm_ctx_list {
586 struct list_head head; /**< list head */
587 drm_context_t handle; /**< context handle */
588 struct drm_file *tag; /**< associated fd private data */
591 /* location of GART table */
592 #define DRM_ATI_GART_MAIN 1
593 #define DRM_ATI_GART_FB 2
595 #define DRM_ATI_GART_PCI 1
596 #define DRM_ATI_GART_PCIE 2
597 #define DRM_ATI_GART_IGP 3
599 struct drm_ati_pcigart_info {
600 int gart_table_location;
604 dma_addr_t table_mask;
605 struct drm_dma_handle *table_handle;
606 struct drm_local_map mapping;
611 * GEM specific mm private for tracking GEM objects
614 struct drm_vma_offset_manager vma_manager;
618 * This structure defines the drm_mm memory object, which will be used by the
619 * DRM for its buffer objects.
621 struct drm_gem_object {
622 /** Reference count of this object */
623 struct kref refcount;
626 * handle_count - gem file_priv handle count of this object
628 * Each handle also holds a reference. Note that when the handle_count
629 * drops to 0 any global names (e.g. the id in the flink namespace) will
632 * Protected by dev->object_name_lock.
634 unsigned handle_count;
636 /** Related drm device */
637 struct drm_device *dev;
639 /** File representing the shmem storage */
642 /* Mapping info for this object */
643 struct drm_vma_offset_node vma_node;
646 * Size of the object, in bytes. Immutable over the object's
652 * Global name for this object, starts at 1. 0 means unnamed.
653 * Access is covered by the object_name_lock in the related drm_device
658 * Memory domains. These monitor which caches contain read/write data
659 * related to the object. When transitioning from one set of domains
660 * to another, the driver is called to ensure that caches are suitably
661 * flushed and invalidated
663 uint32_t read_domains;
664 uint32_t write_domain;
667 * While validating an exec operation, the
668 * new read/write domain values are computed here.
669 * They will be transferred to the above values
670 * at the point that any cache flushing occurs
672 uint32_t pending_read_domains;
673 uint32_t pending_write_domain;
676 * dma_buf - dma buf associated with this GEM object
678 * Pointer to the dma-buf associated with this gem object (either
679 * through importing or exporting). We break the resulting reference
680 * loop when the last gem handle for this object is released.
682 * Protected by obj->object_name_lock
684 struct dma_buf *dma_buf;
687 * import_attach - dma buf attachment backing this object
689 * Any foreign dma_buf imported as a gem object has this set to the
690 * attachment point for the device. This is invariant over the lifetime
693 * The driver's ->gem_free_object callback is responsible for cleaning
694 * up the dma_buf attachment and references acquired at import time.
696 * Note that the drm gem/prime core does not depend upon drivers setting
697 * this field any more. So for drivers where this doesn't make sense
698 * (e.g. virtual devices or a displaylink behind an usb bus) they can
699 * simply leave it as NULL.
701 struct dma_buf_attachment *import_attach;
704 #include <drm/drm_crtc.h>
706 /* per-master structure */
709 struct kref refcount; /* refcount for this master */
711 struct list_head head; /**< each minor contains a list of masters */
712 struct drm_minor *minor; /**< link back to minor we are a master for */
714 char *unique; /**< Unique identifier: e.g., busid */
715 int unique_len; /**< Length of unique field */
716 int unique_size; /**< amount allocated */
718 int blocked; /**< Blocked due to VC switch? */
720 /** \name Authentication */
722 struct drm_open_hash magiclist;
723 struct list_head magicfree;
726 struct drm_lock_data lock; /**< Information on hardware lock */
728 void *driver_priv; /**< Private structure for driver to use */
731 /* Size of ringbuffer for vblank timestamps. Just double-buffer
732 * in initial implementation.
734 #define DRM_VBLANKTIME_RBSIZE 2
736 /* Flags and return codes for get_vblank_timestamp() driver function. */
737 #define DRM_CALLED_FROM_VBLIRQ 1
738 #define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
739 #define DRM_VBLANKTIME_INVBL (1 << 1)
741 /* get_scanout_position() return flags */
742 #define DRM_SCANOUTPOS_VALID (1 << 0)
743 #define DRM_SCANOUTPOS_INVBL (1 << 1)
744 #define DRM_SCANOUTPOS_ACCURATE (1 << 2)
748 int (*get_irq)(struct drm_device *dev);
749 const char *(*get_name)(struct drm_device *dev);
750 int (*set_busid)(struct drm_device *dev, struct drm_master *master);
751 int (*set_unique)(struct drm_device *dev, struct drm_master *master,
752 struct drm_unique *unique);
753 int (*irq_by_busid)(struct drm_device *dev, struct drm_irq_busid *p);
754 /* hooks that are for PCI */
755 int (*agp_init)(struct drm_device *dev);
756 void (*agp_destroy)(struct drm_device *dev);
761 * DRM driver structure. This structure represent the common code for
762 * a family of cards. There will one drm_device for each card present
766 int (*load) (struct drm_device *, unsigned long flags);
767 int (*firstopen) (struct drm_device *);
768 int (*open) (struct drm_device *, struct drm_file *);
769 void (*preclose) (struct drm_device *, struct drm_file *file_priv);
770 void (*postclose) (struct drm_device *, struct drm_file *);
771 void (*lastclose) (struct drm_device *);
772 int (*unload) (struct drm_device *);
773 int (*suspend) (struct drm_device *, pm_message_t state);
774 int (*resume) (struct drm_device *);
775 int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
776 int (*dma_quiescent) (struct drm_device *);
777 int (*context_dtor) (struct drm_device *dev, int context);
780 * get_vblank_counter - get raw hardware vblank counter
782 * @crtc: counter to fetch
784 * Driver callback for fetching a raw hardware vblank counter for @crtc.
785 * If a device doesn't have a hardware counter, the driver can simply
786 * return the value of drm_vblank_count. The DRM core will account for
787 * missed vblank events while interrupts where disabled based on system
790 * Wraparound handling and loss of events due to modesetting is dealt
791 * with in the DRM core code.
794 * Raw vblank counter value.
796 u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
799 * enable_vblank - enable vblank interrupt events
801 * @crtc: which irq to enable
803 * Enable vblank interrupts for @crtc. If the device doesn't have
804 * a hardware vblank counter, this routine should be a no-op, since
805 * interrupts will have to stay on to keep the count accurate.
808 * Zero on success, appropriate errno if the given @crtc's vblank
809 * interrupt cannot be enabled.
811 int (*enable_vblank) (struct drm_device *dev, int crtc);
814 * disable_vblank - disable vblank interrupt events
816 * @crtc: which irq to enable
818 * Disable vblank interrupts for @crtc. If the device doesn't have
819 * a hardware vblank counter, this routine should be a no-op, since
820 * interrupts will have to stay on to keep the count accurate.
822 void (*disable_vblank) (struct drm_device *dev, int crtc);
825 * Called by \c drm_device_is_agp. Typically used to determine if a
826 * card is really attached to AGP or not.
828 * \param dev DRM device handle
831 * One of three values is returned depending on whether or not the
832 * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
833 * (return of 1), or may or may not be AGP (return of 2).
835 int (*device_is_agp) (struct drm_device *dev);
838 * Called by vblank timestamping code.
840 * Return the current display scanout position from a crtc, and an
841 * optional accurate ktime_get timestamp of when position was measured.
843 * \param dev DRM device.
844 * \param crtc Id of the crtc to query.
845 * \param *vpos Target location for current vertical scanout position.
846 * \param *hpos Target location for current horizontal scanout position.
847 * \param *stime Target location for timestamp taken immediately before
848 * scanout position query. Can be NULL to skip timestamp.
849 * \param *etime Target location for timestamp taken immediately after
850 * scanout position query. Can be NULL to skip timestamp.
852 * Returns vpos as a positive number while in active scanout area.
853 * Returns vpos as a negative number inside vblank, counting the number
854 * of scanlines to go until end of vblank, e.g., -1 means "one scanline
855 * until start of active scanout / end of vblank."
857 * \return Flags, or'ed together as follows:
859 * DRM_SCANOUTPOS_VALID = Query successful.
860 * DRM_SCANOUTPOS_INVBL = Inside vblank.
861 * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
862 * this flag means that returned position may be offset by a constant
863 * but unknown small number of scanlines wrt. real scanout position.
866 int (*get_scanout_position) (struct drm_device *dev, int crtc,
867 int *vpos, int *hpos, ktime_t *stime,
871 * Called by \c drm_get_last_vbltimestamp. Should return a precise
872 * timestamp when the most recent VBLANK interval ended or will end.
874 * Specifically, the timestamp in @vblank_time should correspond as
875 * closely as possible to the time when the first video scanline of
876 * the video frame after the end of VBLANK will start scanning out,
877 * the time immediately after end of the VBLANK interval. If the
878 * @crtc is currently inside VBLANK, this will be a time in the future.
879 * If the @crtc is currently scanning out a frame, this will be the
880 * past start time of the current scanout. This is meant to adhere
881 * to the OpenML OML_sync_control extension specification.
883 * \param dev dev DRM device handle.
884 * \param crtc crtc for which timestamp should be returned.
885 * \param *max_error Maximum allowable timestamp error in nanoseconds.
886 * Implementation should strive to provide timestamp
887 * with an error of at most *max_error nanoseconds.
888 * Returns true upper bound on error for timestamp.
889 * \param *vblank_time Target location for returned vblank timestamp.
890 * \param flags 0 = Defaults, no special treatment needed.
891 * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
892 * irq handler. Some drivers need to apply some workarounds
893 * for gpu-specific vblank irq quirks if flag is set.
896 * Zero if timestamping isn't supported in current display mode or a
897 * negative number on failure. A positive status code on success,
898 * which describes how the vblank_time timestamp was computed.
900 int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
902 struct timeval *vblank_time,
905 /* these have to be filled in */
907 irqreturn_t(*irq_handler) (DRM_IRQ_ARGS);
908 void (*irq_preinstall) (struct drm_device *dev);
909 int (*irq_postinstall) (struct drm_device *dev);
910 void (*irq_uninstall) (struct drm_device *dev);
912 /* Master routines */
913 int (*master_create)(struct drm_device *dev, struct drm_master *master);
914 void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
916 * master_set is called whenever the minor master is set.
917 * master_drop is called whenever the minor master is dropped.
920 int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
922 void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
925 int (*debugfs_init)(struct drm_minor *minor);
926 void (*debugfs_cleanup)(struct drm_minor *minor);
929 * Driver-specific constructor for drm_gem_objects, to set up
930 * obj->driver_private.
932 * Returns 0 on success.
934 void (*gem_free_object) (struct drm_gem_object *obj);
935 int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
936 void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
939 /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
940 int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
941 uint32_t handle, uint32_t flags, int *prime_fd);
942 /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
943 int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
944 int prime_fd, uint32_t *handle);
945 /* export GEM -> dmabuf */
946 struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
947 struct drm_gem_object *obj, int flags);
948 /* import dmabuf -> GEM */
949 struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
950 struct dma_buf *dma_buf);
951 /* low-level interface used by drm_gem_prime_{import,export} */
952 int (*gem_prime_pin)(struct drm_gem_object *obj);
953 void (*gem_prime_unpin)(struct drm_gem_object *obj);
954 struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
955 struct drm_gem_object *(*gem_prime_import_sg_table)(
956 struct drm_device *dev, size_t size,
957 struct sg_table *sgt);
958 void *(*gem_prime_vmap)(struct drm_gem_object *obj);
959 void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
960 int (*gem_prime_mmap)(struct drm_gem_object *obj,
961 struct vm_area_struct *vma);
963 /* vga arb irq handler */
964 void (*vgaarb_irq)(struct drm_device *dev, bool state);
966 /* dumb alloc support */
967 int (*dumb_create)(struct drm_file *file_priv,
968 struct drm_device *dev,
969 struct drm_mode_create_dumb *args);
970 int (*dumb_map_offset)(struct drm_file *file_priv,
971 struct drm_device *dev, uint32_t handle,
973 int (*dumb_destroy)(struct drm_file *file_priv,
974 struct drm_device *dev,
977 /* Driver private ops for this object */
978 const struct vm_operations_struct *gem_vm_ops;
989 const struct drm_ioctl_desc *ioctls;
991 const struct file_operations *fops;
993 struct pci_driver *pci;
994 struct platform_device *platform_device;
995 struct usb_driver *usb;
999 /* List of devices hanging off this driver */
1000 struct list_head device_list;
1003 #define DRM_MINOR_UNASSIGNED 0
1004 #define DRM_MINOR_LEGACY 1
1005 #define DRM_MINOR_CONTROL 2
1006 #define DRM_MINOR_RENDER 3
1009 * Info file list entry. This structure represents a debugfs or proc file to
1010 * be created by the drm core
1012 struct drm_info_list {
1013 const char *name; /** file name */
1014 int (*show)(struct seq_file*, void*); /** show callback */
1015 u32 driver_features; /**< Required driver features for this entry */
1020 * debugfs node structure. This structure represents a debugfs file.
1022 struct drm_info_node {
1023 struct list_head list;
1024 struct drm_minor *minor;
1025 const struct drm_info_list *info_ent;
1026 struct dentry *dent;
1030 * DRM minor structure. This structure represents a drm minor number.
1033 int index; /**< Minor device number */
1034 int type; /**< Control or render */
1035 dev_t device; /**< Device number for mknod */
1036 struct device *kdev; /**< Linux device */
1037 struct drm_device *dev;
1039 struct dentry *debugfs_root;
1041 struct list_head debugfs_list;
1042 struct mutex debugfs_lock; /* Protects debugfs_list. */
1044 struct drm_master *master; /* currently active master for this node */
1045 struct list_head master_list;
1046 struct drm_mode_group mode_group;
1049 /* mode specified on the command line */
1050 struct drm_cmdline_mode {
1052 bool refresh_specified;
1061 enum drm_connector_force force;
1065 struct drm_pending_vblank_event {
1066 struct drm_pending_event base;
1068 struct drm_event_vblank event;
1071 struct drm_vblank_crtc {
1072 wait_queue_head_t queue; /**< VBLANK wait queue */
1073 struct timeval time[DRM_VBLANKTIME_RBSIZE]; /**< timestamp of current count */
1074 atomic_t count; /**< number of VBLANK interrupts */
1075 atomic_t refcount; /* number of users of vblank interruptsper crtc */
1076 u32 last; /* protected by dev->vbl_lock, used */
1077 /* for wraparound handling */
1078 u32 last_wait; /* Last vblank seqno waited per CRTC */
1079 unsigned int inmodeset; /* Display driver is setting mode */
1080 bool enabled; /* so we don't call enable more than
1085 * DRM device structure. This structure represent a complete card that
1086 * may contain multiple heads.
1089 struct list_head driver_item; /**< list of devices per driver */
1090 char *devname; /**< For /proc/interrupts */
1091 int if_version; /**< Highest interface version set */
1095 spinlock_t count_lock; /**< For inuse, drm_device::open_count, drm_device::buf_use */
1096 struct mutex struct_mutex; /**< For others */
1099 /** \name Usage Counters */
1101 int open_count; /**< Outstanding files open */
1102 atomic_t ioctl_count; /**< Outstanding IOCTLs pending */
1103 atomic_t vma_count; /**< Outstanding vma areas open */
1104 int buf_use; /**< Buffers in use -- cannot alloc */
1105 atomic_t buf_alloc; /**< Buffer allocation in progress */
1108 struct list_head filelist;
1110 /** \name Memory management */
1112 struct list_head maplist; /**< Linked list of regions */
1113 struct drm_open_hash map_hash; /**< User token hash table for maps */
1115 /** \name Context handle management */
1117 struct list_head ctxlist; /**< Linked list of context handles */
1118 struct mutex ctxlist_mutex; /**< For ctxlist */
1122 struct list_head vmalist; /**< List of vmas (for debugging) */
1126 /** \name DMA support */
1128 struct drm_device_dma *dma; /**< Optional pointer for DMA support */
1131 /** \name Context support */
1133 bool irq_enabled; /**< True if irq handler is enabled */
1134 __volatile__ long context_flag; /**< Context swapping flag */
1135 int last_context; /**< Last current context */
1138 /** \name VBLANK IRQ support */
1142 * At load time, disabling the vblank interrupt won't be allowed since
1143 * old clients may not call the modeset ioctl and therefore misbehave.
1144 * Once the modeset ioctl *has* been called though, we can safely
1145 * disable them when unused.
1147 bool vblank_disable_allowed;
1149 /* array of size num_crtcs */
1150 struct drm_vblank_crtc *vblank;
1152 spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
1153 spinlock_t vbl_lock;
1154 struct timer_list vblank_disable_timer;
1156 u32 max_vblank_count; /**< size of vblank counter register */
1161 struct list_head vblank_event_list;
1162 spinlock_t event_lock;
1166 struct drm_agp_head *agp; /**< AGP data */
1168 struct device *dev; /**< Device structure */
1169 struct pci_dev *pdev; /**< PCI device structure */
1171 struct pci_controller *hose;
1174 struct platform_device *platformdev; /**< Platform device struture */
1175 struct usb_device *usbdev;
1177 struct drm_sg_mem *sg; /**< Scatter gather memory */
1178 unsigned int num_crtcs; /**< Number of CRTCs on this device */
1179 void *dev_private; /**< device private data */
1181 struct address_space *dev_mapping;
1182 struct drm_sigdata sigdata; /**< For block_all_signals */
1185 struct drm_driver *driver;
1186 struct drm_local_map *agp_buffer_map;
1187 unsigned int agp_buffer_token;
1188 struct drm_minor *control; /**< Control node for card */
1189 struct drm_minor *primary; /**< render type primary screen head */
1190 struct drm_minor *render; /**< render node for card */
1192 struct drm_mode_config mode_config; /**< Current mode config */
1194 /** \name GEM information */
1196 struct mutex object_name_lock;
1197 struct idr object_name_idr;
1199 int switch_power_state;
1201 atomic_t unplugged; /* device has been unplugged or gone away */
1204 #define DRM_SWITCH_POWER_ON 0
1205 #define DRM_SWITCH_POWER_OFF 1
1206 #define DRM_SWITCH_POWER_CHANGING 2
1207 #define DRM_SWITCH_POWER_DYNAMIC_OFF 3
1209 static __inline__ int drm_core_check_feature(struct drm_device *dev,
1212 return ((dev->driver->driver_features & feature) ? 1 : 0);
1215 static inline int drm_dev_to_irq(struct drm_device *dev)
1217 return dev->driver->bus->get_irq(dev);
1220 static inline void drm_device_set_unplugged(struct drm_device *dev)
1223 atomic_set(&dev->unplugged, 1);
1226 static inline int drm_device_is_unplugged(struct drm_device *dev)
1228 int ret = atomic_read(&dev->unplugged);
1233 static inline bool drm_modeset_is_locked(struct drm_device *dev)
1235 return mutex_is_locked(&dev->mode_config.mutex);
1238 static inline bool drm_is_render_client(struct drm_file *file_priv)
1240 return file_priv->minor->type == DRM_MINOR_RENDER;
1243 /******************************************************************/
1244 /** \name Internal function definitions */
1247 /* Driver support (drm_drv.h) */
1248 extern long drm_ioctl(struct file *filp,
1249 unsigned int cmd, unsigned long arg);
1250 extern long drm_compat_ioctl(struct file *filp,
1251 unsigned int cmd, unsigned long arg);
1252 extern int drm_lastclose(struct drm_device *dev);
1254 /* Device support (drm_fops.h) */
1255 extern struct mutex drm_global_mutex;
1256 extern int drm_open(struct inode *inode, struct file *filp);
1257 extern int drm_stub_open(struct inode *inode, struct file *filp);
1258 extern ssize_t drm_read(struct file *filp, char __user *buffer,
1259 size_t count, loff_t *offset);
1260 extern int drm_release(struct inode *inode, struct file *filp);
1262 /* Mapping support (drm_vm.h) */
1263 extern int drm_mmap(struct file *filp, struct vm_area_struct *vma);
1264 extern int drm_mmap_locked(struct file *filp, struct vm_area_struct *vma);
1265 extern void drm_vm_open_locked(struct drm_device *dev, struct vm_area_struct *vma);
1266 extern void drm_vm_close_locked(struct drm_device *dev, struct vm_area_struct *vma);
1267 extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
1269 /* Memory management support (drm_memory.h) */
1270 #include <drm/drm_memory.h>
1272 /* Misc. IOCTL support (drm_ioctl.h) */
1273 extern int drm_irq_by_busid(struct drm_device *dev, void *data,
1274 struct drm_file *file_priv);
1275 extern int drm_getunique(struct drm_device *dev, void *data,
1276 struct drm_file *file_priv);
1277 extern int drm_setunique(struct drm_device *dev, void *data,
1278 struct drm_file *file_priv);
1279 extern int drm_getmap(struct drm_device *dev, void *data,
1280 struct drm_file *file_priv);
1281 extern int drm_getclient(struct drm_device *dev, void *data,
1282 struct drm_file *file_priv);
1283 extern int drm_getstats(struct drm_device *dev, void *data,
1284 struct drm_file *file_priv);
1285 extern int drm_getcap(struct drm_device *dev, void *data,
1286 struct drm_file *file_priv);
1287 extern int drm_setclientcap(struct drm_device *dev, void *data,
1288 struct drm_file *file_priv);
1289 extern int drm_setversion(struct drm_device *dev, void *data,
1290 struct drm_file *file_priv);
1291 extern int drm_noop(struct drm_device *dev, void *data,
1292 struct drm_file *file_priv);
1294 /* Context IOCTL support (drm_context.h) */
1295 extern int drm_resctx(struct drm_device *dev, void *data,
1296 struct drm_file *file_priv);
1297 extern int drm_addctx(struct drm_device *dev, void *data,
1298 struct drm_file *file_priv);
1299 extern int drm_getctx(struct drm_device *dev, void *data,
1300 struct drm_file *file_priv);
1301 extern int drm_switchctx(struct drm_device *dev, void *data,
1302 struct drm_file *file_priv);
1303 extern int drm_newctx(struct drm_device *dev, void *data,
1304 struct drm_file *file_priv);
1305 extern int drm_rmctx(struct drm_device *dev, void *data,
1306 struct drm_file *file_priv);
1308 extern int drm_ctxbitmap_init(struct drm_device *dev);
1309 extern void drm_ctxbitmap_cleanup(struct drm_device *dev);
1310 extern void drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
1312 extern int drm_setsareactx(struct drm_device *dev, void *data,
1313 struct drm_file *file_priv);
1314 extern int drm_getsareactx(struct drm_device *dev, void *data,
1315 struct drm_file *file_priv);
1317 /* Authentication IOCTL support (drm_auth.h) */
1318 extern int drm_getmagic(struct drm_device *dev, void *data,
1319 struct drm_file *file_priv);
1320 extern int drm_authmagic(struct drm_device *dev, void *data,
1321 struct drm_file *file_priv);
1322 extern int drm_remove_magic(struct drm_master *master, drm_magic_t magic);
1324 /* Cache management (drm_cache.c) */
1325 void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
1326 void drm_clflush_sg(struct sg_table *st);
1327 void drm_clflush_virt_range(char *addr, unsigned long length);
1329 /* Locking IOCTL support (drm_lock.h) */
1330 extern int drm_lock(struct drm_device *dev, void *data,
1331 struct drm_file *file_priv);
1332 extern int drm_unlock(struct drm_device *dev, void *data,
1333 struct drm_file *file_priv);
1334 extern int drm_lock_free(struct drm_lock_data *lock_data, unsigned int context);
1335 extern void drm_idlelock_take(struct drm_lock_data *lock_data);
1336 extern void drm_idlelock_release(struct drm_lock_data *lock_data);
1339 * These are exported to drivers so that they can implement fencing using
1340 * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
1343 extern int drm_i_have_hw_lock(struct drm_device *dev, struct drm_file *file_priv);
1345 /* Buffer management support (drm_bufs.h) */
1346 extern int drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc * request);
1347 extern int drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc * request);
1348 extern int drm_addmap(struct drm_device *dev, resource_size_t offset,
1349 unsigned int size, enum drm_map_type type,
1350 enum drm_map_flags flags, struct drm_local_map **map_ptr);
1351 extern int drm_addmap_ioctl(struct drm_device *dev, void *data,
1352 struct drm_file *file_priv);
1353 extern int drm_rmmap(struct drm_device *dev, struct drm_local_map *map);
1354 extern int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map);
1355 extern int drm_rmmap_ioctl(struct drm_device *dev, void *data,
1356 struct drm_file *file_priv);
1357 extern int drm_addbufs(struct drm_device *dev, void *data,
1358 struct drm_file *file_priv);
1359 extern int drm_infobufs(struct drm_device *dev, void *data,
1360 struct drm_file *file_priv);
1361 extern int drm_markbufs(struct drm_device *dev, void *data,
1362 struct drm_file *file_priv);
1363 extern int drm_freebufs(struct drm_device *dev, void *data,
1364 struct drm_file *file_priv);
1365 extern int drm_mapbufs(struct drm_device *dev, void *data,
1366 struct drm_file *file_priv);
1367 extern int drm_dma_ioctl(struct drm_device *dev, void *data,
1368 struct drm_file *file_priv);
1370 /* DMA support (drm_dma.h) */
1371 extern int drm_legacy_dma_setup(struct drm_device *dev);
1372 extern void drm_legacy_dma_takedown(struct drm_device *dev);
1373 extern void drm_free_buffer(struct drm_device *dev, struct drm_buf * buf);
1374 extern void drm_core_reclaim_buffers(struct drm_device *dev,
1375 struct drm_file *filp);
1377 /* IRQ support (drm_irq.h) */
1378 extern int drm_control(struct drm_device *dev, void *data,
1379 struct drm_file *file_priv);
1380 extern int drm_irq_install(struct drm_device *dev);
1381 extern int drm_irq_uninstall(struct drm_device *dev);
1383 extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
1384 extern int drm_wait_vblank(struct drm_device *dev, void *data,
1385 struct drm_file *filp);
1386 extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
1387 extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
1388 struct timeval *vblanktime);
1389 extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
1390 struct drm_pending_vblank_event *e);
1391 extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
1392 extern int drm_vblank_get(struct drm_device *dev, int crtc);
1393 extern void drm_vblank_put(struct drm_device *dev, int crtc);
1394 extern void drm_vblank_off(struct drm_device *dev, int crtc);
1395 extern void drm_vblank_cleanup(struct drm_device *dev);
1396 extern u32 drm_get_last_vbltimestamp(struct drm_device *dev, int crtc,
1397 struct timeval *tvblank, unsigned flags);
1398 extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
1399 int crtc, int *max_error,
1400 struct timeval *vblank_time,
1402 struct drm_crtc *refcrtc);
1403 extern void drm_calc_timestamping_constants(struct drm_crtc *crtc);
1406 drm_mode_parse_command_line_for_connector(const char *mode_option,
1407 struct drm_connector *connector,
1408 struct drm_cmdline_mode *mode);
1410 extern struct drm_display_mode *
1411 drm_mode_create_from_cmdline_mode(struct drm_device *dev,
1412 struct drm_cmdline_mode *cmd);
1414 extern int drm_display_mode_from_videomode(const struct videomode *vm,
1415 struct drm_display_mode *dmode);
1416 extern int of_get_drm_display_mode(struct device_node *np,
1417 struct drm_display_mode *dmode,
1420 /* Modesetting support */
1421 extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
1422 extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
1423 extern int drm_modeset_ctl(struct drm_device *dev, void *data,
1424 struct drm_file *file_priv);
1426 /* AGP/GART support (drm_agpsupport.h) */
1428 #include <drm/drm_agpsupport.h>
1430 /* Stub support (drm_stub.h) */
1431 extern int drm_setmaster_ioctl(struct drm_device *dev, void *data,
1432 struct drm_file *file_priv);
1433 extern int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
1434 struct drm_file *file_priv);
1435 struct drm_master *drm_master_create(struct drm_minor *minor);
1436 extern struct drm_master *drm_master_get(struct drm_master *master);
1437 extern void drm_master_put(struct drm_master **master);
1439 extern void drm_put_dev(struct drm_device *dev);
1440 extern int drm_put_minor(struct drm_minor **minor);
1441 extern void drm_unplug_dev(struct drm_device *dev);
1442 extern unsigned int drm_debug;
1443 extern unsigned int drm_rnodes;
1445 extern unsigned int drm_vblank_offdelay;
1446 extern unsigned int drm_timestamp_precision;
1447 extern unsigned int drm_timestamp_monotonic;
1449 extern struct class *drm_class;
1450 extern struct dentry *drm_debugfs_root;
1452 extern struct idr drm_minors_idr;
1454 extern struct drm_local_map *drm_getsarea(struct drm_device *dev);
1456 /* Debugfs support */
1457 #if defined(CONFIG_DEBUG_FS)
1458 extern int drm_debugfs_init(struct drm_minor *minor, int minor_id,
1459 struct dentry *root);
1460 extern int drm_debugfs_create_files(const struct drm_info_list *files,
1461 int count, struct dentry *root,
1462 struct drm_minor *minor);
1463 extern int drm_debugfs_remove_files(const struct drm_info_list *files,
1464 int count, struct drm_minor *minor);
1465 extern int drm_debugfs_cleanup(struct drm_minor *minor);
1468 /* Info file support */
1469 extern int drm_name_info(struct seq_file *m, void *data);
1470 extern int drm_vm_info(struct seq_file *m, void *data);
1471 extern int drm_bufs_info(struct seq_file *m, void *data);
1472 extern int drm_vblank_info(struct seq_file *m, void *data);
1473 extern int drm_clients_info(struct seq_file *m, void* data);
1474 extern int drm_gem_name_info(struct seq_file *m, void *data);
1477 extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
1478 struct drm_gem_object *obj, int flags);
1479 extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
1480 struct drm_file *file_priv, uint32_t handle, uint32_t flags,
1482 extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
1483 struct dma_buf *dma_buf);
1484 extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
1485 struct drm_file *file_priv, int prime_fd, uint32_t *handle);
1486 extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
1488 extern int drm_prime_handle_to_fd_ioctl(struct drm_device *dev, void *data,
1489 struct drm_file *file_priv);
1490 extern int drm_prime_fd_to_handle_ioctl(struct drm_device *dev, void *data,
1491 struct drm_file *file_priv);
1493 extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
1494 dma_addr_t *addrs, int max_pages);
1495 extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, int nr_pages);
1496 extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
1498 int drm_gem_dumb_destroy(struct drm_file *file,
1499 struct drm_device *dev,
1502 void drm_prime_init_file_private(struct drm_prime_file_private *prime_fpriv);
1503 void drm_prime_destroy_file_private(struct drm_prime_file_private *prime_fpriv);
1504 void drm_prime_remove_buf_handle_locked(struct drm_prime_file_private *prime_fpriv, struct dma_buf *dma_buf);
1507 extern int drm_vma_info(struct seq_file *m, void *data);
1510 /* Scatter Gather Support (drm_scatter.h) */
1511 extern void drm_legacy_sg_cleanup(struct drm_device *dev);
1512 extern int drm_sg_alloc(struct drm_device *dev, void *data,
1513 struct drm_file *file_priv);
1514 extern int drm_sg_free(struct drm_device *dev, void *data,
1515 struct drm_file *file_priv);
1517 /* ATI PCIGART support (ati_pcigart.h) */
1518 extern int drm_ati_pcigart_init(struct drm_device *dev,
1519 struct drm_ati_pcigart_info * gart_info);
1520 extern int drm_ati_pcigart_cleanup(struct drm_device *dev,
1521 struct drm_ati_pcigart_info * gart_info);
1523 extern drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
1525 extern void __drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1526 extern void drm_pci_free(struct drm_device *dev, drm_dma_handle_t * dmah);
1528 /* sysfs support (drm_sysfs.c) */
1529 struct drm_sysfs_class;
1530 extern struct class *drm_sysfs_create(struct module *owner, char *name);
1531 extern void drm_sysfs_destroy(void);
1532 extern int drm_sysfs_device_add(struct drm_minor *minor);
1533 extern void drm_sysfs_hotplug_event(struct drm_device *dev);
1534 extern void drm_sysfs_device_remove(struct drm_minor *minor);
1535 extern int drm_sysfs_connector_add(struct drm_connector *connector);
1536 extern void drm_sysfs_connector_remove(struct drm_connector *connector);
1538 /* Graphics Execution Manager library functions (drm_gem.c) */
1539 int drm_gem_init(struct drm_device *dev);
1540 void drm_gem_destroy(struct drm_device *dev);
1541 void drm_gem_object_release(struct drm_gem_object *obj);
1542 void drm_gem_object_free(struct kref *kref);
1543 int drm_gem_object_init(struct drm_device *dev,
1544 struct drm_gem_object *obj, size_t size);
1545 void drm_gem_private_object_init(struct drm_device *dev,
1546 struct drm_gem_object *obj, size_t size);
1547 void drm_gem_vm_open(struct vm_area_struct *vma);
1548 void drm_gem_vm_close(struct vm_area_struct *vma);
1549 int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size,
1550 struct vm_area_struct *vma);
1551 int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
1553 #include <drm/drm_global.h>
1556 drm_gem_object_reference(struct drm_gem_object *obj)
1558 kref_get(&obj->refcount);
1562 drm_gem_object_unreference(struct drm_gem_object *obj)
1565 kref_put(&obj->refcount, drm_gem_object_free);
1569 drm_gem_object_unreference_unlocked(struct drm_gem_object *obj)
1571 if (obj && !atomic_add_unless(&obj->refcount.refcount, -1, 1)) {
1572 struct drm_device *dev = obj->dev;
1574 mutex_lock(&dev->struct_mutex);
1575 if (likely(atomic_dec_and_test(&obj->refcount.refcount)))
1576 drm_gem_object_free(&obj->refcount);
1577 mutex_unlock(&dev->struct_mutex);
1581 int drm_gem_handle_create_tail(struct drm_file *file_priv,
1582 struct drm_gem_object *obj,
1584 int drm_gem_handle_create(struct drm_file *file_priv,
1585 struct drm_gem_object *obj,
1587 int drm_gem_handle_delete(struct drm_file *filp, u32 handle);
1590 void drm_gem_free_mmap_offset(struct drm_gem_object *obj);
1591 int drm_gem_create_mmap_offset(struct drm_gem_object *obj);
1592 int drm_gem_create_mmap_offset_size(struct drm_gem_object *obj, size_t size);
1594 struct page **drm_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);
1595 void drm_gem_put_pages(struct drm_gem_object *obj, struct page **pages,
1596 bool dirty, bool accessed);
1598 struct drm_gem_object *drm_gem_object_lookup(struct drm_device *dev,
1599 struct drm_file *filp,
1601 int drm_gem_close_ioctl(struct drm_device *dev, void *data,
1602 struct drm_file *file_priv);
1603 int drm_gem_flink_ioctl(struct drm_device *dev, void *data,
1604 struct drm_file *file_priv);
1605 int drm_gem_open_ioctl(struct drm_device *dev, void *data,
1606 struct drm_file *file_priv);
1607 void drm_gem_open(struct drm_device *dev, struct drm_file *file_private);
1608 void drm_gem_release(struct drm_device *dev, struct drm_file *file_private);
1610 extern void drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev);
1611 extern void drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev);
1612 extern void drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev);
1614 static __inline__ struct drm_local_map *drm_core_findmap(struct drm_device *dev,
1617 struct drm_map_list *_entry;
1618 list_for_each_entry(_entry, &dev->maplist, head)
1619 if (_entry->user_token == token)
1624 static __inline__ void drm_core_dropmap(struct drm_local_map *map)
1628 #include <drm/drm_mem_util.h>
1630 struct drm_device *drm_dev_alloc(struct drm_driver *driver,
1631 struct device *parent);
1632 void drm_dev_free(struct drm_device *dev);
1633 int drm_dev_register(struct drm_device *dev, unsigned long flags);
1634 void drm_dev_unregister(struct drm_device *dev);
1635 int drm_get_minor(struct drm_device *dev, struct drm_minor **minor, int type);
1639 static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
1641 if (dev->driver->device_is_agp != NULL) {
1642 int err = (*dev->driver->device_is_agp) (dev);
1649 return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
1652 extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
1653 extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
1654 extern int drm_get_pci_dev(struct pci_dev *pdev,
1655 const struct pci_device_id *ent,
1656 struct drm_driver *driver);
1658 #define DRM_PCIE_SPEED_25 1
1659 #define DRM_PCIE_SPEED_50 2
1660 #define DRM_PCIE_SPEED_80 4
1662 extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
1664 /* platform section */
1665 extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
1666 extern void drm_platform_exit(struct drm_driver *driver, struct platform_device *platform_device);
1668 /* returns true if currently okay to sleep */
1669 static __inline__ bool drm_can_sleep(void)
1671 if (in_atomic() || in_dbg_master() || irqs_disabled())
1676 #endif /* __KERNEL__ */