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linux/include/drm/drmP.h

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/*
* 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/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 <linux/dma-fence.h>
#include <linux/module.h>
#include <asm/mman.h>
#include <asm/pgalloc.h>
#include <linux/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_fourcc.h>
#include <drm/drm_global.h>
#include <drm/drm_hashtab.h>
#include <drm/drm_mm.h>
#include <drm/drm_os_linux.h>
#include <drm/drm_sarea.h>
#include <drm/drm_drv.h>
#include <drm/drm_prime.h>
#include <drm/drm_pci.h>
#include <drm/drm_file.h>
#include <drm/drm_debugfs.h>
#include <drm/drm_ioctl.h>
#include <drm/drm_sysfs.h>
#include <drm/drm_vblank.h>
#include <drm/drm_irq.h>
struct module;
struct drm_device;
struct drm_agp_head;
struct drm_local_map;
struct drm_device_dma;
struct drm_gem_object;
struct drm_master;
struct drm_vblank_crtc;
struct drm_vma_offset_manager;
struct device_node;
struct videomode;
struct reservation_object;
struct dma_buf_attachment;
struct pci_dev;
struct pci_controller;
/*
* The following 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.
*
* VBL: used for verbose debug message in the vblank code
* This is the category used by the DRM_DEBUG_VBL() 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=0x3f 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_NONE 0x00
#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
#define DRM_UT_VBL 0x20
#define DRM_UT_STATE 0x40
/***********************************************************************/
/** \name DRM template customization defaults */
/*@{*/
/***********************************************************************/
/** \name Macros to make printk easier */
/*@{*/
#define _DRM_PRINTK(once, level, fmt, ...) \
do { \
printk##once(KERN_##level "[" DRM_NAME "] " fmt, \
##__VA_ARGS__); \
} while (0)
#define DRM_INFO(fmt, ...) \
_DRM_PRINTK(, INFO, fmt, ##__VA_ARGS__)
#define DRM_NOTE(fmt, ...) \
_DRM_PRINTK(, NOTICE, fmt, ##__VA_ARGS__)
#define DRM_WARN(fmt, ...) \
_DRM_PRINTK(, WARNING, fmt, ##__VA_ARGS__)
#define DRM_INFO_ONCE(fmt, ...) \
_DRM_PRINTK(_once, INFO, fmt, ##__VA_ARGS__)
#define DRM_NOTE_ONCE(fmt, ...) \
_DRM_PRINTK(_once, NOTICE, fmt, ##__VA_ARGS__)
#define DRM_WARN_ONCE(fmt, ...) \
_DRM_PRINTK(_once, WARNING, fmt, ##__VA_ARGS__)
/**
* Error output.
*
* \param fmt printf() like format string.
* \param arg arguments
*/
#define DRM_DEV_ERROR(dev, fmt, ...) \
drm_dev_printk(dev, KERN_ERR, DRM_UT_NONE, __func__, " *ERROR*",\
fmt, ##__VA_ARGS__)
#define DRM_ERROR(fmt, ...) \
drm_printk(KERN_ERR, DRM_UT_NONE, 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_DEV_ERROR_RATELIMITED(dev, fmt, ...) \
({ \
static DEFINE_RATELIMIT_STATE(_rs, \
DEFAULT_RATELIMIT_INTERVAL, \
DEFAULT_RATELIMIT_BURST); \
\
if (__ratelimit(&_rs)) \
DRM_DEV_ERROR(dev, fmt, ##__VA_ARGS__); \
})
#define DRM_ERROR_RATELIMITED(fmt, ...) \
DRM_DEV_ERROR_RATELIMITED(NULL, fmt, ##__VA_ARGS__)
#define DRM_DEV_INFO(dev, fmt, ...) \
drm_dev_printk(dev, KERN_INFO, DRM_UT_NONE, __func__, "", fmt, \
##__VA_ARGS__)
#define DRM_DEV_INFO_ONCE(dev, fmt, ...) \
({ \
static bool __print_once __read_mostly; \
if (!__print_once) { \
__print_once = true; \
DRM_DEV_INFO(dev, fmt, ##__VA_ARGS__); \
} \
})
/**
* Debug output.
*
* \param fmt printf() like format string.
* \param arg arguments
*/
#define DRM_DEV_DEBUG(dev, fmt, args...) \
drm_dev_printk(dev, KERN_DEBUG, DRM_UT_CORE, __func__, "", fmt, \
##args)
#define DRM_DEBUG(fmt, ...) \
drm_printk(KERN_DEBUG, DRM_UT_CORE, fmt, ##__VA_ARGS__)
#define DRM_DEV_DEBUG_DRIVER(dev, fmt, args...) \
drm_dev_printk(dev, KERN_DEBUG, DRM_UT_DRIVER, __func__, "", \
fmt, ##args)
#define DRM_DEBUG_DRIVER(fmt, ...) \
drm_printk(KERN_DEBUG, DRM_UT_DRIVER, fmt, ##__VA_ARGS__)
#define DRM_DEV_DEBUG_KMS(dev, fmt, args...) \
drm_dev_printk(dev, KERN_DEBUG, DRM_UT_KMS, __func__, "", fmt, \
##args)
#define DRM_DEBUG_KMS(fmt, ...) \
drm_printk(KERN_DEBUG, DRM_UT_KMS, fmt, ##__VA_ARGS__)
#define DRM_DEV_DEBUG_PRIME(dev, fmt, args...) \
drm_dev_printk(dev, KERN_DEBUG, DRM_UT_PRIME, __func__, "", \
fmt, ##args)
#define DRM_DEBUG_PRIME(fmt, ...) \
drm_printk(KERN_DEBUG, DRM_UT_PRIME, fmt, ##__VA_ARGS__)
#define DRM_DEV_DEBUG_ATOMIC(dev, fmt, args...) \
drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ATOMIC, __func__, "", \
fmt, ##args)
#define DRM_DEBUG_ATOMIC(fmt, ...) \
drm_printk(KERN_DEBUG, DRM_UT_ATOMIC, fmt, ##__VA_ARGS__)
#define DRM_DEV_DEBUG_VBL(dev, fmt, args...) \
drm_dev_printk(dev, KERN_DEBUG, DRM_UT_VBL, __func__, "", fmt, \
##args)
#define DRM_DEBUG_VBL(fmt, ...) \
drm_printk(KERN_DEBUG, DRM_UT_VBL, fmt, ##__VA_ARGS__)
#define _DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, level, fmt, args...) \
({ \
static DEFINE_RATELIMIT_STATE(_rs, \
DEFAULT_RATELIMIT_INTERVAL, \
DEFAULT_RATELIMIT_BURST); \
if (__ratelimit(&_rs)) \
drm_dev_printk(dev, KERN_DEBUG, DRM_UT_ ## level, \
__func__, "", fmt, ##args); \
})
/**
* Rate limited debug output. Like DRM_DEBUG() but won't flood the log.
*
* \param fmt printf() like format string.
* \param arg arguments
*/
#define DRM_DEV_DEBUG_RATELIMITED(dev, fmt, args...) \
DEV__DRM_DEFINE_DEBUG_RATELIMITED(dev, CORE, fmt, ##args)
#define DRM_DEBUG_RATELIMITED(fmt, args...) \
DRM_DEV_DEBUG_RATELIMITED(NULL, fmt, ##args)
#define DRM_DEV_DEBUG_DRIVER_RATELIMITED(dev, fmt, args...) \
_DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, DRIVER, fmt, ##args)
#define DRM_DEBUG_DRIVER_RATELIMITED(fmt, args...) \
DRM_DEV_DEBUG_DRIVER_RATELIMITED(NULL, fmt, ##args)
#define DRM_DEV_DEBUG_KMS_RATELIMITED(dev, fmt, args...) \
_DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, KMS, fmt, ##args)
#define DRM_DEBUG_KMS_RATELIMITED(fmt, args...) \
DRM_DEV_DEBUG_KMS_RATELIMITED(NULL, fmt, ##args)
#define DRM_DEV_DEBUG_PRIME_RATELIMITED(dev, fmt, args...) \
_DRM_DEV_DEFINE_DEBUG_RATELIMITED(dev, PRIME, fmt, ##args)
#define DRM_DEBUG_PRIME_RATELIMITED(fmt, args...) \
DRM_DEV_DEBUG_PRIME_RATELIMITED(NULL, fmt, ##args)
/* Format strings and argument splitters to simplify printing
* various "complex" objects
*/
/*@}*/
/***********************************************************************/
/** \name Internal types and structures */
/*@{*/
#define DRM_IF_VERSION(maj, min) (maj << 16 | min)
/**
* 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 */
bool registered;
/* currently active master for this device. Protected by master_mutex */
struct drm_master *master;
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 mutex filelist_mutex;
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 */
/*@} */
/**
* @irq_enabled:
*
* Indicates that interrupt handling is enabled, specifically vblank
* handling. Drivers which don't use drm_irq_install() need to set this
* to true manually.
*/
bool irq_enabled;
int irq;
/*
* 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 drm_sg_mem *sg; /**< Scatter gather memory */
unsigned int num_crtcs; /**< Number of CRTCs on this device */
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;
};
/**
* drm_drv_uses_atomic_modeset - check if the driver implements
* atomic_commit()
* @dev: DRM device
*
* This check is useful if drivers do not have DRIVER_ATOMIC set but
* have atomic modesetting internally implemented.
*/
static inline bool drm_drv_uses_atomic_modeset(struct drm_device *dev)
{
return dev->mode_config.funcs->atomic_commit != NULL;
}
#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;
}
/******************************************************************/
/** \name Internal function definitions */
/*@{*/
/* Driver support (drm_drv.h) */
/*
* These are exported to drivers so that they can implement fencing using
* DMA quiscent + idle. DMA quiescent usually requires the hardware lock.
*/
/*@}*/
/* 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;
}
/* helper for handling conditionals in various for_each macros */
#define for_each_if(condition) if (!(condition)) {} else
#endif
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