--- /dev/null
+/*
+ * Internal Header for the Direct Rendering Manager
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * Copyright (c) 2009-2010, Code Aurora Forum.
+ * All rights reserved.
+ *
+ * Author: Rickard E. (Rik) Faith <faith@valinux.com>
+ * Author: Gareth Hughes <gareth@valinux.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef _DRM_P_H_
+#define _DRM_P_H_
+
+#include <linux/agp_backend.h>
+#include <linux/cdev.h>
+#include <linux/dma-mapping.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/highmem.h>
+#include <linux/idr.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/kref.h>
+#include <linux/miscdevice.h>
+#include <linux/mm.h>
+#include <linux/mutex.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/poll.h>
+#include <linux/ratelimit.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/vmalloc.h>
+#include <linux/workqueue.h>
+
+#include <asm/mman.h>
+#include <asm/pgalloc.h>
+#include <asm/uaccess.h>
+
+#include <uapi/drm/drm.h>
+#include <uapi/drm/drm_mode.h>
+
+#include <drm/drm_agpsupport.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_global.h>
+#include <drm/drm_hashtab.h>
+#include <drm/drm_mem_util.h>
+#include <drm/drm_mm.h>
+#include <drm/drm_os_linux.h>
+#include <drm/drm_sarea.h>
+#include <drm/drm_vma_manager.h>
+
+struct module;
+
+struct drm_file;
+struct drm_device;
+struct drm_agp_head;
+struct drm_local_map;
+struct drm_device_dma;
+struct drm_dma_handle;
+struct drm_gem_object;
+
+struct device_node;
+struct videomode;
+struct reservation_object;
+struct dma_buf_attachment;
+
+/*
+ * 4 debug categories are defined:
+ *
+ * CORE: Used in the generic drm code: drm_ioctl.c, drm_mm.c, drm_memory.c, ...
+ * This is the category used by the DRM_DEBUG() macro.
+ *
+ * DRIVER: Used in the vendor specific part of the driver: i915, radeon, ...
+ * This is the category used by the DRM_DEBUG_DRIVER() macro.
+ *
+ * KMS: used in the modesetting code.
+ * This is the category used by the DRM_DEBUG_KMS() macro.
+ *
+ * PRIME: used in the prime code.
+ * This is the category used by the DRM_DEBUG_PRIME() macro.
+ *
+ * ATOMIC: used in the atomic code.
+ * This is the category used by the DRM_DEBUG_ATOMIC() macro.
+ *
+ * Enabling verbose debug messages is done through the drm.debug parameter,
+ * each category being enabled by a bit.
+ *
+ * drm.debug=0x1 will enable CORE messages
+ * drm.debug=0x2 will enable DRIVER messages
+ * drm.debug=0x3 will enable CORE and DRIVER messages
+ * ...
+ * drm.debug=0xf will enable all messages
+ *
+ * An interesting feature is that it's possible to enable verbose logging at
+ * run-time by echoing the debug value in its sysfs node:
+ * # echo 0xf > /sys/module/drm/parameters/debug
+ */
+#define DRM_UT_CORE 0x01
+#define DRM_UT_DRIVER 0x02
+#define DRM_UT_KMS 0x04
+#define DRM_UT_PRIME 0x08
+#define DRM_UT_ATOMIC 0x10
+
+extern __printf(2, 3)
+void drm_ut_debug_printk(const char *function_name,
+ const char *format, ...);
+extern __printf(1, 2)
+void drm_err(const char *format, ...);
+
+/***********************************************************************/
+/** \name DRM template customization defaults */
+/*@{*/
+
+/* driver capabilities and requirements mask */
+#define DRIVER_USE_AGP 0x1
+#define DRIVER_PCI_DMA 0x8
+#define DRIVER_SG 0x10
+#define DRIVER_HAVE_DMA 0x20
+#define DRIVER_HAVE_IRQ 0x40
+#define DRIVER_IRQ_SHARED 0x80
+#define DRIVER_GEM 0x1000
+#define DRIVER_MODESET 0x2000
+#define DRIVER_PRIME 0x4000
+#define DRIVER_RENDER 0x8000
+#define DRIVER_ATOMIC 0x10000
+
+/***********************************************************************/
+/** \name Macros to make printk easier */
+/*@{*/
+
+/**
+ * Error output.
+ *
+ * \param fmt printf() like format string.
+ * \param arg arguments
+ */
+#define DRM_ERROR(fmt, ...) \
+ drm_err(fmt, ##__VA_ARGS__)
+
+/**
+ * Rate limited error output. Like DRM_ERROR() but won't flood the log.
+ *
+ * \param fmt printf() like format string.
+ * \param arg arguments
+ */
+#define DRM_ERROR_RATELIMITED(fmt, ...) \
+({ \
+ static DEFINE_RATELIMIT_STATE(_rs, \
+ DEFAULT_RATELIMIT_INTERVAL, \
+ DEFAULT_RATELIMIT_BURST); \
+ \
+ if (__ratelimit(&_rs)) \
+ drm_err(fmt, ##__VA_ARGS__); \
+})
+
+#define DRM_INFO(fmt, ...) \
+ printk(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
+
+#define DRM_INFO_ONCE(fmt, ...) \
+ printk_once(KERN_INFO "[" DRM_NAME "] " fmt, ##__VA_ARGS__)
+
+/**
+ * Debug output.
+ *
+ * \param fmt printf() like format string.
+ * \param arg arguments
+ */
+#define DRM_DEBUG(fmt, args...) \
+ do { \
+ if (unlikely(drm_debug & DRM_UT_CORE)) \
+ drm_ut_debug_printk(__func__, fmt, ##args); \
+ } while (0)
+
+#define DRM_DEBUG_DRIVER(fmt, args...) \
+ do { \
+ if (unlikely(drm_debug & DRM_UT_DRIVER)) \
+ drm_ut_debug_printk(__func__, fmt, ##args); \
+ } while (0)
+#define DRM_DEBUG_KMS(fmt, args...) \
+ do { \
+ if (unlikely(drm_debug & DRM_UT_KMS)) \
+ drm_ut_debug_printk(__func__, fmt, ##args); \
+ } while (0)
+#define DRM_DEBUG_PRIME(fmt, args...) \
+ do { \
+ if (unlikely(drm_debug & DRM_UT_PRIME)) \
+ drm_ut_debug_printk(__func__, fmt, ##args); \
+ } while (0)
+#define DRM_DEBUG_ATOMIC(fmt, args...) \
+ do { \
+ if (unlikely(drm_debug & DRM_UT_ATOMIC)) \
+ drm_ut_debug_printk(__func__, fmt, ##args); \
+ } while (0)
+
+/*@}*/
+
+/***********************************************************************/
+/** \name Internal types and structures */
+/*@{*/
+
+#define DRM_IF_VERSION(maj, min) (maj << 16 | min)
+
+/**
+ * Ioctl function type.
+ *
+ * \param inode device inode.
+ * \param file_priv DRM file private pointer.
+ * \param cmd command.
+ * \param arg argument.
+ */
+typedef int drm_ioctl_t(struct drm_device *dev, void *data,
+ struct drm_file *file_priv);
+
+typedef int drm_ioctl_compat_t(struct file *filp, unsigned int cmd,
+ unsigned long arg);
+
+#define DRM_IOCTL_NR(n) _IOC_NR(n)
+#define DRM_MAJOR 226
+
+#define DRM_AUTH 0x1
+#define DRM_MASTER 0x2
+#define DRM_ROOT_ONLY 0x4
+#define DRM_CONTROL_ALLOW 0x8
+#define DRM_UNLOCKED 0x10
+#define DRM_RENDER_ALLOW 0x20
+
+struct drm_ioctl_desc {
+ unsigned int cmd;
+ int flags;
+ drm_ioctl_t *func;
+ const char *name;
+};
+
+/**
+ * Creates a driver or general drm_ioctl_desc array entry for the given
+ * ioctl, for use by drm_ioctl().
+ */
+
+#define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags) \
+ [DRM_IOCTL_NR(DRM_IOCTL_##ioctl) - DRM_COMMAND_BASE] = { \
+ .cmd = DRM_IOCTL_##ioctl, \
+ .func = _func, \
+ .flags = _flags, \
+ .name = #ioctl \
+ }
+
+/* Event queued up for userspace to read */
+struct drm_pending_event {
+ struct drm_event *event;
+ struct list_head link;
+ struct drm_file *file_priv;
+ pid_t pid; /* pid of requester, no guarantee it's valid by the time
+ we deliver the event, for tracing only */
+ void (*destroy)(struct drm_pending_event *event);
+};
+
+/* initial implementaton using a linked list - todo hashtab */
+struct drm_prime_file_private {
+ struct list_head head;
+ struct mutex lock;
+};
+
+/** File private data */
+struct drm_file {
+ unsigned authenticated :1;
+ /* Whether we're master for a minor. Protected by master_mutex */
+ unsigned is_master :1;
+ /* true when the client has asked us to expose stereo 3D mode flags */
+ unsigned stereo_allowed :1;
+ /*
+ * true if client understands CRTC primary planes and cursor planes
+ * in the plane list
+ */
+ unsigned universal_planes:1;
+ /* true if client understands atomic properties */
+ unsigned atomic:1;
+
+ struct pid *pid;
+ kuid_t uid;
+ drm_magic_t magic;
+ struct list_head lhead;
+ struct drm_minor *minor;
+ unsigned long lock_count;
+
+ /** Mapping of mm object handles to object pointers. */
+ struct idr object_idr;
+ /** Lock for synchronization of access to object_idr. */
+ spinlock_t table_lock;
+
+ struct file *filp;
+ void *driver_priv;
+
+ struct drm_master *master; /* master this node is currently associated with
+ N.B. not always minor->master */
+ /**
+ * fbs - List of framebuffers associated with this file.
+ *
+ * Protected by fbs_lock. Note that the fbs list holds a reference on
+ * the fb object to prevent it from untimely disappearing.
+ */
+ struct list_head fbs;
+ struct mutex fbs_lock;
+
+ wait_queue_head_t event_wait;
+ struct list_head event_list;
+ int event_space;
+
+ struct drm_prime_file_private prime;
+};
+
+/**
+ * Lock data.
+ */
+struct drm_lock_data {
+ struct drm_hw_lock *hw_lock; /**< Hardware lock */
+ /** Private of lock holder's file (NULL=kernel) */
+ struct drm_file *file_priv;
+ wait_queue_head_t lock_queue; /**< Queue of blocked processes */
+ unsigned long lock_time; /**< Time of last lock in jiffies */
+ spinlock_t spinlock;
+ uint32_t kernel_waiters;
+ uint32_t user_waiters;
+ int idle_has_lock;
+};
+
+/**
+ * struct drm_master - drm master structure
+ *
+ * @refcount: Refcount for this master object.
+ * @minor: Link back to minor char device we are master for. Immutable.
+ * @unique: Unique identifier: e.g. busid. Protected by drm_global_mutex.
+ * @unique_len: Length of unique field. Protected by drm_global_mutex.
+ * @magiclist: Hash of used authentication tokens. Protected by struct_mutex.
+ * @magicfree: List of used authentication tokens. Protected by struct_mutex.
+ * @lock: DRI lock information.
+ * @driver_priv: Pointer to driver-private information.
+ */
+struct drm_master {
+ struct kref refcount;
+ struct drm_minor *minor;
+ char *unique;
+ int unique_len;
+ struct drm_open_hash magiclist;
+ struct list_head magicfree;
+ struct drm_lock_data lock;
+ void *driver_priv;
+};
+
+/* Size of ringbuffer for vblank timestamps. Just double-buffer
+ * in initial implementation.
+ */
+#define DRM_VBLANKTIME_RBSIZE 2
+
+/* Flags and return codes for get_vblank_timestamp() driver function. */
+#define DRM_CALLED_FROM_VBLIRQ 1
+#define DRM_VBLANKTIME_SCANOUTPOS_METHOD (1 << 0)
+#define DRM_VBLANKTIME_IN_VBLANK (1 << 1)
+
+/* get_scanout_position() return flags */
+#define DRM_SCANOUTPOS_VALID (1 << 0)
+#define DRM_SCANOUTPOS_IN_VBLANK (1 << 1)
+#define DRM_SCANOUTPOS_ACCURATE (1 << 2)
+
+/**
+ * DRM driver structure. This structure represent the common code for
+ * a family of cards. There will one drm_device for each card present
+ * in this family
+ */
+struct drm_driver {
+ int (*load) (struct drm_device *, unsigned long flags);
+ int (*firstopen) (struct drm_device *);
+ int (*open) (struct drm_device *, struct drm_file *);
+ void (*preclose) (struct drm_device *, struct drm_file *file_priv);
+ void (*postclose) (struct drm_device *, struct drm_file *);
+ void (*lastclose) (struct drm_device *);
+ int (*unload) (struct drm_device *);
+ int (*suspend) (struct drm_device *, pm_message_t state);
+ int (*resume) (struct drm_device *);
+ int (*dma_ioctl) (struct drm_device *dev, void *data, struct drm_file *file_priv);
+ int (*dma_quiescent) (struct drm_device *);
+ int (*context_dtor) (struct drm_device *dev, int context);
+ int (*set_busid)(struct drm_device *dev, struct drm_master *master);
+
+ /**
+ * get_vblank_counter - get raw hardware vblank counter
+ * @dev: DRM device
+ * @crtc: counter to fetch
+ *
+ * Driver callback for fetching a raw hardware vblank counter for @crtc.
+ * If a device doesn't have a hardware counter, the driver can simply
+ * return the value of drm_vblank_count. The DRM core will account for
+ * missed vblank events while interrupts where disabled based on system
+ * timestamps.
+ *
+ * Wraparound handling and loss of events due to modesetting is dealt
+ * with in the DRM core code.
+ *
+ * RETURNS
+ * Raw vblank counter value.
+ */
+ u32 (*get_vblank_counter) (struct drm_device *dev, int crtc);
+
+ /**
+ * enable_vblank - enable vblank interrupt events
+ * @dev: DRM device
+ * @crtc: which irq to enable
+ *
+ * Enable vblank interrupts for @crtc. If the device doesn't have
+ * a hardware vblank counter, this routine should be a no-op, since
+ * interrupts will have to stay on to keep the count accurate.
+ *
+ * RETURNS
+ * Zero on success, appropriate errno if the given @crtc's vblank
+ * interrupt cannot be enabled.
+ */
+ int (*enable_vblank) (struct drm_device *dev, int crtc);
+
+ /**
+ * disable_vblank - disable vblank interrupt events
+ * @dev: DRM device
+ * @crtc: which irq to enable
+ *
+ * Disable vblank interrupts for @crtc. If the device doesn't have
+ * a hardware vblank counter, this routine should be a no-op, since
+ * interrupts will have to stay on to keep the count accurate.
+ */
+ void (*disable_vblank) (struct drm_device *dev, int crtc);
+
+ /**
+ * Called by \c drm_device_is_agp. Typically used to determine if a
+ * card is really attached to AGP or not.
+ *
+ * \param dev DRM device handle
+ *
+ * \returns
+ * One of three values is returned depending on whether or not the
+ * card is absolutely \b not AGP (return of 0), absolutely \b is AGP
+ * (return of 1), or may or may not be AGP (return of 2).
+ */
+ int (*device_is_agp) (struct drm_device *dev);
+
+ /**
+ * Called by vblank timestamping code.
+ *
+ * Return the current display scanout position from a crtc, and an
+ * optional accurate ktime_get timestamp of when position was measured.
+ *
+ * \param dev DRM device.
+ * \param crtc Id of the crtc to query.
+ * \param flags Flags from the caller (DRM_CALLED_FROM_VBLIRQ or 0).
+ * \param *vpos Target location for current vertical scanout position.
+ * \param *hpos Target location for current horizontal scanout position.
+ * \param *stime Target location for timestamp taken immediately before
+ * scanout position query. Can be NULL to skip timestamp.
+ * \param *etime Target location for timestamp taken immediately after
+ * scanout position query. Can be NULL to skip timestamp.
+ *
+ * Returns vpos as a positive number while in active scanout area.
+ * Returns vpos as a negative number inside vblank, counting the number
+ * of scanlines to go until end of vblank, e.g., -1 means "one scanline
+ * until start of active scanout / end of vblank."
+ *
+ * \return Flags, or'ed together as follows:
+ *
+ * DRM_SCANOUTPOS_VALID = Query successful.
+ * DRM_SCANOUTPOS_INVBL = Inside vblank.
+ * DRM_SCANOUTPOS_ACCURATE = Returned position is accurate. A lack of
+ * this flag means that returned position may be offset by a constant
+ * but unknown small number of scanlines wrt. real scanout position.
+ *
+ */
+ int (*get_scanout_position) (struct drm_device *dev, int crtc,
+ unsigned int flags,
+ int *vpos, int *hpos, ktime_t *stime,
+ ktime_t *etime);
+
+ /**
+ * Called by \c drm_get_last_vbltimestamp. Should return a precise
+ * timestamp when the most recent VBLANK interval ended or will end.
+ *
+ * Specifically, the timestamp in @vblank_time should correspond as
+ * closely as possible to the time when the first video scanline of
+ * the video frame after the end of VBLANK will start scanning out,
+ * the time immediately after end of the VBLANK interval. If the
+ * @crtc is currently inside VBLANK, this will be a time in the future.
+ * If the @crtc is currently scanning out a frame, this will be the
+ * past start time of the current scanout. This is meant to adhere
+ * to the OpenML OML_sync_control extension specification.
+ *
+ * \param dev dev DRM device handle.
+ * \param crtc crtc for which timestamp should be returned.
+ * \param *max_error Maximum allowable timestamp error in nanoseconds.
+ * Implementation should strive to provide timestamp
+ * with an error of at most *max_error nanoseconds.
+ * Returns true upper bound on error for timestamp.
+ * \param *vblank_time Target location for returned vblank timestamp.
+ * \param flags 0 = Defaults, no special treatment needed.
+ * \param DRM_CALLED_FROM_VBLIRQ = Function is called from vblank
+ * irq handler. Some drivers need to apply some workarounds
+ * for gpu-specific vblank irq quirks if flag is set.
+ *
+ * \returns
+ * Zero if timestamping isn't supported in current display mode or a
+ * negative number on failure. A positive status code on success,
+ * which describes how the vblank_time timestamp was computed.
+ */
+ int (*get_vblank_timestamp) (struct drm_device *dev, int crtc,
+ int *max_error,
+ struct timeval *vblank_time,
+ unsigned flags);
+
+ /* these have to be filled in */
+
+ irqreturn_t(*irq_handler) (int irq, void *arg);
+ void (*irq_preinstall) (struct drm_device *dev);
+ int (*irq_postinstall) (struct drm_device *dev);
+ void (*irq_uninstall) (struct drm_device *dev);
+
+ /* Master routines */
+ int (*master_create)(struct drm_device *dev, struct drm_master *master);
+ void (*master_destroy)(struct drm_device *dev, struct drm_master *master);
+ /**
+ * master_set is called whenever the minor master is set.
+ * master_drop is called whenever the minor master is dropped.
+ */
+
+ int (*master_set)(struct drm_device *dev, struct drm_file *file_priv,
+ bool from_open);
+ void (*master_drop)(struct drm_device *dev, struct drm_file *file_priv,
+ bool from_release);
+
+ int (*debugfs_init)(struct drm_minor *minor);
+ void (*debugfs_cleanup)(struct drm_minor *minor);
+
+ /**
+ * Driver-specific constructor for drm_gem_objects, to set up
+ * obj->driver_private.
+ *
+ * Returns 0 on success.
+ */
+ void (*gem_free_object) (struct drm_gem_object *obj);
+ int (*gem_open_object) (struct drm_gem_object *, struct drm_file *);
+ void (*gem_close_object) (struct drm_gem_object *, struct drm_file *);
+
+ /* prime: */
+ /* export handle -> fd (see drm_gem_prime_handle_to_fd() helper) */
+ int (*prime_handle_to_fd)(struct drm_device *dev, struct drm_file *file_priv,
+ uint32_t handle, uint32_t flags, int *prime_fd);
+ /* import fd -> handle (see drm_gem_prime_fd_to_handle() helper) */
+ int (*prime_fd_to_handle)(struct drm_device *dev, struct drm_file *file_priv,
+ int prime_fd, uint32_t *handle);
+ /* export GEM -> dmabuf */
+ struct dma_buf * (*gem_prime_export)(struct drm_device *dev,
+ struct drm_gem_object *obj, int flags);
+ /* import dmabuf -> GEM */
+ struct drm_gem_object * (*gem_prime_import)(struct drm_device *dev,
+ struct dma_buf *dma_buf);
+ /* low-level interface used by drm_gem_prime_{import,export} */
+ int (*gem_prime_pin)(struct drm_gem_object *obj);
+ void (*gem_prime_unpin)(struct drm_gem_object *obj);
+ struct reservation_object * (*gem_prime_res_obj)(
+ struct drm_gem_object *obj);
+ struct sg_table *(*gem_prime_get_sg_table)(struct drm_gem_object *obj);
+ struct drm_gem_object *(*gem_prime_import_sg_table)(
+ struct drm_device *dev,
+ struct dma_buf_attachment *attach,
+ struct sg_table *sgt);
+ void *(*gem_prime_vmap)(struct drm_gem_object *obj);
+ void (*gem_prime_vunmap)(struct drm_gem_object *obj, void *vaddr);
+ int (*gem_prime_mmap)(struct drm_gem_object *obj,
+ struct vm_area_struct *vma);
+
+ /* vga arb irq handler */
+ void (*vgaarb_irq)(struct drm_device *dev, bool state);
+
+ /* dumb alloc support */
+ int (*dumb_create)(struct drm_file *file_priv,
+ struct drm_device *dev,
+ struct drm_mode_create_dumb *args);
+ int (*dumb_map_offset)(struct drm_file *file_priv,
+ struct drm_device *dev, uint32_t handle,
+ uint64_t *offset);
+ int (*dumb_destroy)(struct drm_file *file_priv,
+ struct drm_device *dev,
+ uint32_t handle);
+
+ /* Driver private ops for this object */
+ const struct vm_operations_struct *gem_vm_ops;
+
+ int major;
+ int minor;
+ int patchlevel;
+ char *name;
+ char *desc;
+ char *date;
+
+ u32 driver_features;
+ int dev_priv_size;
+ const struct drm_ioctl_desc *ioctls;
+ int num_ioctls;
+ const struct file_operations *fops;
+
+ /* List of devices hanging off this driver with stealth attach. */
+ struct list_head legacy_dev_list;
+};
+
+enum drm_minor_type {
+ DRM_MINOR_LEGACY,
+ DRM_MINOR_CONTROL,
+ DRM_MINOR_RENDER,
+ DRM_MINOR_CNT,
+};
+
+/**
+ * Info file list entry. This structure represents a debugfs or proc file to
+ * be created by the drm core
+ */
+struct drm_info_list {
+ const char *name; /** file name */
+ int (*show)(struct seq_file*, void*); /** show callback */
+ u32 driver_features; /**< Required driver features for this entry */
+ void *data;
+};
+
+/**
+ * debugfs node structure. This structure represents a debugfs file.
+ */
+struct drm_info_node {
+ struct list_head list;
+ struct drm_minor *minor;
+ const struct drm_info_list *info_ent;
+ struct dentry *dent;
+};
+
+/**
+ * DRM minor structure. This structure represents a drm minor number.
+ */
+struct drm_minor {
+ int index; /**< Minor device number */
+ int type; /**< Control or render */
+ struct device *kdev; /**< Linux device */
+ struct drm_device *dev;
+
+ struct dentry *debugfs_root;
+
+ struct list_head debugfs_list;
+ struct mutex debugfs_lock; /* Protects debugfs_list. */
+
+ /* currently active master for this node. Protected by master_mutex */
+ struct drm_master *master;
+ struct drm_mode_group mode_group;
+};
+
+
+struct drm_pending_vblank_event {
+ struct drm_pending_event base;
+ int pipe;
+ struct drm_event_vblank event;
+};
+
+struct drm_vblank_crtc {
+ struct drm_device *dev; /* pointer to the drm_device */
+ wait_queue_head_t queue; /**< VBLANK wait queue */
+ struct timeval time[DRM_VBLANKTIME_RBSIZE]; /**< timestamp of current count */
+ struct timer_list disable_timer; /* delayed disable timer */
+ atomic_t count; /**< number of VBLANK interrupts */
+ atomic_t refcount; /* number of users of vblank interruptsper crtc */
+ u32 last; /* protected by dev->vbl_lock, used */
+ /* for wraparound handling */
+ u32 last_wait; /* Last vblank seqno waited per CRTC */
+ unsigned int inmodeset; /* Display driver is setting mode */
+ int crtc; /* crtc index */
+ bool enabled; /* so we don't call enable more than
+ once per disable */
+};
+
+/**
+ * DRM device structure. This structure represent a complete card that
+ * may contain multiple heads.
+ */
+struct drm_device {
+ struct list_head legacy_dev_list;/**< list of devices per driver for stealth attach cleanup */
+ int if_version; /**< Highest interface version set */
+
+ /** \name Lifetime Management */
+ /*@{ */
+ struct kref ref; /**< Object ref-count */
+ struct device *dev; /**< Device structure of bus-device */
+ struct drm_driver *driver; /**< DRM driver managing the device */
+ void *dev_private; /**< DRM driver private data */
+ struct drm_minor *control; /**< Control node */
+ struct drm_minor *primary; /**< Primary node */
+ struct drm_minor *render; /**< Render node */
+ atomic_t unplugged; /**< Flag whether dev is dead */
+ struct inode *anon_inode; /**< inode for private address-space */
+ char *unique; /**< unique name of the device */
+ /*@} */
+
+ /** \name Locks */
+ /*@{ */
+ struct mutex struct_mutex; /**< For others */
+ struct mutex master_mutex; /**< For drm_minor::master and drm_file::is_master */
+ /*@} */
+
+ /** \name Usage Counters */
+ /*@{ */
+ int open_count; /**< Outstanding files open, protected by drm_global_mutex. */
+ spinlock_t buf_lock; /**< For drm_device::buf_use and a few other things. */
+ int buf_use; /**< Buffers in use -- cannot alloc */
+ atomic_t buf_alloc; /**< Buffer allocation in progress */
+ /*@} */
+
+ struct list_head filelist;
+
+ /** \name Memory management */
+ /*@{ */
+ struct list_head maplist; /**< Linked list of regions */
+ struct drm_open_hash map_hash; /**< User token hash table for maps */
+
+ /** \name Context handle management */
+ /*@{ */
+ struct list_head ctxlist; /**< Linked list of context handles */
+ struct mutex ctxlist_mutex; /**< For ctxlist */
+
+ struct idr ctx_idr;
+
+ struct list_head vmalist; /**< List of vmas (for debugging) */
+
+ /*@} */
+
+ /** \name DMA support */
+ /*@{ */
+ struct drm_device_dma *dma; /**< Optional pointer for DMA support */
+ /*@} */
+
+ /** \name Context support */
+ /*@{ */
+
+ __volatile__ long context_flag; /**< Context swapping flag */
+ int last_context; /**< Last current context */
+ /*@} */
+
+ /** \name VBLANK IRQ support */
+ /*@{ */
+ bool irq_enabled;
+ int irq;
+
+ /*
+ * At load time, disabling the vblank interrupt won't be allowed since
+ * old clients may not call the modeset ioctl and therefore misbehave.
+ * Once the modeset ioctl *has* been called though, we can safely
+ * disable them when unused.
+ */
+ bool vblank_disable_allowed;
+
+ /*
+ * If true, vblank interrupt will be disabled immediately when the
+ * refcount drops to zero, as opposed to via the vblank disable
+ * timer.
+ * This can be set to true it the hardware has a working vblank
+ * counter and the driver uses drm_vblank_on() and drm_vblank_off()
+ * appropriately.
+ */
+ bool vblank_disable_immediate;
+
+ /* array of size num_crtcs */
+ struct drm_vblank_crtc *vblank;
+
+ spinlock_t vblank_time_lock; /**< Protects vblank count and time updates during vblank enable/disable */
+ spinlock_t vbl_lock;
+
+ u32 max_vblank_count; /**< size of vblank counter register */
+
+ /**
+ * List of events
+ */
+ struct list_head vblank_event_list;
+ spinlock_t event_lock;
+
+ /*@} */
+
+ struct drm_agp_head *agp; /**< AGP data */
+
+ struct pci_dev *pdev; /**< PCI device structure */
+#ifdef __alpha__
+ struct pci_controller *hose;
+#endif
+
+ struct platform_device *platformdev; /**< Platform device struture */
+
+ struct drm_sg_mem *sg; /**< Scatter gather memory */
+ unsigned int num_crtcs; /**< Number of CRTCs on this device */
+ sigset_t sigmask;
+
+ struct {
+ int context;
+ struct drm_hw_lock *lock;
+ } sigdata;
+
+ struct drm_local_map *agp_buffer_map;
+ unsigned int agp_buffer_token;
+
+ struct drm_mode_config mode_config; /**< Current mode config */
+
+ /** \name GEM information */
+ /*@{ */
+ struct mutex object_name_lock;
+ struct idr object_name_idr;
+ struct drm_vma_offset_manager *vma_offset_manager;
+ /*@} */
+ int switch_power_state;
+};
+
+#define DRM_SWITCH_POWER_ON 0
+#define DRM_SWITCH_POWER_OFF 1
+#define DRM_SWITCH_POWER_CHANGING 2
+#define DRM_SWITCH_POWER_DYNAMIC_OFF 3
+
+static __inline__ int drm_core_check_feature(struct drm_device *dev,
+ int feature)
+{
+ return ((dev->driver->driver_features & feature) ? 1 : 0);
+}
+
+static inline void drm_device_set_unplugged(struct drm_device *dev)
+{
+ smp_wmb();
+ atomic_set(&dev->unplugged, 1);
+}
+
+static inline int drm_device_is_unplugged(struct drm_device *dev)
+{
+ int ret = atomic_read(&dev->unplugged);
+ smp_rmb();
+ return ret;
+}
+
+static inline bool drm_is_render_client(const struct drm_file *file_priv)
+{
+ return file_priv->minor->type == DRM_MINOR_RENDER;
+}
+
+static inline bool drm_is_control_client(const struct drm_file *file_priv)
+{
+ return file_priv->minor->type == DRM_MINOR_CONTROL;
+}
+
+static inline bool drm_is_primary_client(const struct drm_file *file_priv)
+{
+ return file_priv->minor->type == DRM_MINOR_LEGACY;
+}
+
+/******************************************************************/
+/** \name Internal function definitions */
+/*@{*/
+
+ /* Driver support (drm_drv.h) */
+extern long drm_ioctl(struct file *filp,
+ unsigned int cmd, unsigned long arg);
+extern long drm_compat_ioctl(struct file *filp,
+ unsigned int cmd, unsigned long arg);
+extern bool drm_ioctl_flags(unsigned int nr, unsigned int *flags);
+
+ /* Device support (drm_fops.h) */
+extern int drm_open(struct inode *inode, struct file *filp);
+extern ssize_t drm_read(struct file *filp, char __user *buffer,
+ size_t count, loff_t *offset);
+extern int drm_release(struct inode *inode, struct file *filp);
+
+ /* Mapping support (drm_vm.h) */
+extern unsigned int drm_poll(struct file *filp, struct poll_table_struct *wait);
+
+/* Misc. IOCTL support (drm_ioctl.c) */
+int drm_noop(struct drm_device *dev, void *data,
+ struct drm_file *file_priv);
+
+/* Cache management (drm_cache.c) */
+void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
+void drm_clflush_sg(struct sg_table *st);
+void drm_clflush_virt_range(void *addr, unsigned long length);
+
+/*
+ * These are exported to drivers so that they can implement fencing using
+ * DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
+ */
+
+ /* IRQ support (drm_irq.h) */
+extern int drm_irq_install(struct drm_device *dev, int irq);
+extern int drm_irq_uninstall(struct drm_device *dev);
+
+extern int drm_vblank_init(struct drm_device *dev, int num_crtcs);
+extern int drm_wait_vblank(struct drm_device *dev, void *data,
+ struct drm_file *filp);
+extern u32 drm_vblank_count(struct drm_device *dev, int crtc);
+extern u32 drm_crtc_vblank_count(struct drm_crtc *crtc);
+extern u32 drm_vblank_count_and_time(struct drm_device *dev, int crtc,
+ struct timeval *vblanktime);
+extern void drm_send_vblank_event(struct drm_device *dev, int crtc,
+ struct drm_pending_vblank_event *e);
+extern void drm_crtc_send_vblank_event(struct drm_crtc *crtc,
+ struct drm_pending_vblank_event *e);
+extern bool drm_handle_vblank(struct drm_device *dev, int crtc);
+extern bool drm_crtc_handle_vblank(struct drm_crtc *crtc);
+extern int drm_vblank_get(struct drm_device *dev, int crtc);
+extern void drm_vblank_put(struct drm_device *dev, int crtc);
+extern int drm_crtc_vblank_get(struct drm_crtc *crtc);
+extern void drm_crtc_vblank_put(struct drm_crtc *crtc);
+extern void drm_wait_one_vblank(struct drm_device *dev, int crtc);
+extern void drm_crtc_wait_one_vblank(struct drm_crtc *crtc);
+extern void drm_vblank_off(struct drm_device *dev, int crtc);
+extern void drm_vblank_on(struct drm_device *dev, int crtc);
+extern void drm_crtc_vblank_off(struct drm_crtc *crtc);
+extern void drm_crtc_vblank_reset(struct drm_crtc *crtc);
+extern void drm_crtc_vblank_on(struct drm_crtc *crtc);
+extern void drm_vblank_cleanup(struct drm_device *dev);
+
+extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
+ int crtc, int *max_error,
+ struct timeval *vblank_time,
+ unsigned flags,
+ const struct drm_crtc *refcrtc,
+ const struct drm_display_mode *mode);
+extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
+ const struct drm_display_mode *mode);
+
+/**
+ * drm_crtc_vblank_waitqueue - get vblank waitqueue for the CRTC
+ * @crtc: which CRTC's vblank waitqueue to retrieve
+ *
+ * This function returns a pointer to the vblank waitqueue for the CRTC.
+ * Drivers can use this to implement vblank waits using wait_event() & co.
+ */
+static inline wait_queue_head_t *drm_crtc_vblank_waitqueue(struct drm_crtc *crtc)
+{
+ return &crtc->dev->vblank[drm_crtc_index(crtc)].queue;
+}
+
+/* Modesetting support */
+extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc);
+extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);
+
+ /* Stub support (drm_stub.h) */
+extern struct drm_master *drm_master_get(struct drm_master *master);
+extern void drm_master_put(struct drm_master **master);
+
+extern void drm_put_dev(struct drm_device *dev);
+extern void drm_unplug_dev(struct drm_device *dev);
+extern unsigned int drm_debug;
+extern bool drm_atomic;
+
+ /* Debugfs support */
+#if defined(CONFIG_DEBUG_FS)
+extern int drm_debugfs_create_files(const struct drm_info_list *files,
+ int count, struct dentry *root,
+ struct drm_minor *minor);
+extern int drm_debugfs_remove_files(const struct drm_info_list *files,
+ int count, struct drm_minor *minor);
+#else
+static inline int drm_debugfs_create_files(const struct drm_info_list *files,
+ int count, struct dentry *root,
+ struct drm_minor *minor)
+{
+ return 0;
+}
+
+static inline int drm_debugfs_remove_files(const struct drm_info_list *files,
+ int count, struct drm_minor *minor)
+{
+ return 0;
+}
+#endif
+
+extern struct dma_buf *drm_gem_prime_export(struct drm_device *dev,
+ struct drm_gem_object *obj, int flags);
+extern int drm_gem_prime_handle_to_fd(struct drm_device *dev,
+ struct drm_file *file_priv, uint32_t handle, uint32_t flags,
+ int *prime_fd);
+extern struct drm_gem_object *drm_gem_prime_import(struct drm_device *dev,
+ struct dma_buf *dma_buf);
+extern int drm_gem_prime_fd_to_handle(struct drm_device *dev,
+ struct drm_file *file_priv, int prime_fd, uint32_t *handle);
+extern void drm_gem_dmabuf_release(struct dma_buf *dma_buf);
+
+extern int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,
+ dma_addr_t *addrs, int max_pages);
+extern struct sg_table *drm_prime_pages_to_sg(struct page **pages, unsigned int nr_pages);
+extern void drm_prime_gem_destroy(struct drm_gem_object *obj, struct sg_table *sg);
+
+
+extern struct drm_dma_handle *drm_pci_alloc(struct drm_device *dev, size_t size,
+ size_t align);
+extern void drm_pci_free(struct drm_device *dev, struct drm_dma_handle * dmah);
+
+ /* sysfs support (drm_sysfs.c) */
+extern void drm_sysfs_hotplug_event(struct drm_device *dev);
+
+
+struct drm_device *drm_dev_alloc(struct drm_driver *driver,
+ struct device *parent);
+void drm_dev_ref(struct drm_device *dev);
+void drm_dev_unref(struct drm_device *dev);
+int drm_dev_register(struct drm_device *dev, unsigned long flags);
+void drm_dev_unregister(struct drm_device *dev);
+int drm_dev_set_unique(struct drm_device *dev, const char *fmt, ...);
+
+struct drm_minor *drm_minor_acquire(unsigned int minor_id);
+void drm_minor_release(struct drm_minor *minor);
+
+/*@}*/
+
+/* PCI section */
+static __inline__ int drm_pci_device_is_agp(struct drm_device *dev)
+{
+ if (dev->driver->device_is_agp != NULL) {
+ int err = (*dev->driver->device_is_agp) (dev);
+
+ if (err != 2) {
+ return err;
+ }
+ }
+
+ return pci_find_capability(dev->pdev, PCI_CAP_ID_AGP);
+}
+void drm_pci_agp_destroy(struct drm_device *dev);
+
+extern int drm_pci_init(struct drm_driver *driver, struct pci_driver *pdriver);
+extern void drm_pci_exit(struct drm_driver *driver, struct pci_driver *pdriver);
+#ifdef CONFIG_PCI
+extern int drm_get_pci_dev(struct pci_dev *pdev,
+ const struct pci_device_id *ent,
+ struct drm_driver *driver);
+extern int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master);
+#else
+static inline int drm_get_pci_dev(struct pci_dev *pdev,
+ const struct pci_device_id *ent,
+ struct drm_driver *driver)
+{
+ return -ENOSYS;
+}
+
+static inline int drm_pci_set_busid(struct drm_device *dev,
+ struct drm_master *master)
+{
+ return -ENOSYS;
+}
+#endif
+
+#define DRM_PCIE_SPEED_25 1
+#define DRM_PCIE_SPEED_50 2
+#define DRM_PCIE_SPEED_80 4
+
+extern int drm_pcie_get_speed_cap_mask(struct drm_device *dev, u32 *speed_mask);
+
+/* platform section */
+extern int drm_platform_init(struct drm_driver *driver, struct platform_device *platform_device);
+extern int drm_platform_set_busid(struct drm_device *d, struct drm_master *m);
+
+/* returns true if currently okay to sleep */
+static __inline__ bool drm_can_sleep(void)
+{
+ if (in_atomic() || in_dbg_master() || irqs_disabled())
+ return false;
+ return true;
+}
+
+#endif
Code Review / kvmfornfv.git / blobdiff