FreeBSD/Linux Kernel Cross Reference
sys/dev/drm/drmP.h

     /* drmP.h -- Private header for Direct Rendering Manager -*- linux-c -*-
      * Created: Mon Jan  4 10:05:05 1999 by faith@precisioninsight.com
      */
     /*-
      * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
      * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
      * All rights reserved.
      *
      * 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.
     *
     * Authors:
     *    Rickard E. (Rik) Faith <faith@valinux.com>
     *    Gareth Hughes <gareth@valinux.com>
     *
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/9.0/sys/dev/drm/drmP.h 215367 2010-11-16 03:43:06Z nwhitehorn $");
    
    #ifndef _DRM_P_H_
    #define _DRM_P_H_
    
    #if defined(_KERNEL) || defined(__KERNEL__)
    
    struct drm_device;
    struct drm_file;
    
    #include <sys/param.h>
    #include <sys/queue.h>
    #include <sys/malloc.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/systm.h>
    #include <sys/conf.h>
    #include <sys/sglist.h>
    #include <sys/stat.h>
    #if __FreeBSD_version >= 700000
    #include <sys/priv.h>
    #endif
    #include <sys/proc.h>
    #include <sys/lock.h>
    #include <sys/fcntl.h>
    #include <sys/uio.h>
    #include <sys/filio.h>
    #include <sys/sysctl.h>
    #include <sys/bus.h>
    #include <sys/queue.h>
    #include <sys/signalvar.h>
    #include <sys/poll.h>
    #include <sys/taskqueue.h>
    #include <sys/tree.h>
    #include <vm/vm.h>
    #include <vm/pmap.h>
    #include <vm/vm_extern.h>
    #include <vm/vm_kern.h>
    #include <vm/vm_map.h>
    #include <vm/vm_object.h>
    #include <vm/vm_page.h>
    #include <vm/vm_pager.h>
    #include <vm/vm_param.h>
    #include <vm/vm_phys.h>
    #include <machine/param.h>
    #include <machine/pmap.h>
    #include <machine/bus.h>
    #include <machine/resource.h>
    #if defined(__i386__) || defined(__amd64__)
    #include <machine/specialreg.h>
    #endif
    #include <machine/sysarch.h>
    #include <sys/endian.h>
    #include <sys/mman.h>
    #include <sys/rman.h>
    #include <sys/memrange.h>
    #if __FreeBSD_version >= 800004
    #include <dev/agp/agpvar.h>
    #else /* __FreeBSD_version >= 800004 */
    #include <pci/agpvar.h>
    #endif /* __FreeBSD_version >= 800004 */
    #include <sys/agpio.h>
    #include <sys/mutex.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcireg.h>
   #include <sys/selinfo.h>
   #include <sys/bus.h>
   
   #include "dev/drm/drm.h"
   #include "dev/drm/drm_atomic.h"
   #include "dev/drm/drm_internal.h"
   #include "dev/drm/drm_linux_list.h"
   
   #include <opt_drm.h>
   #ifdef DRM_DEBUG
   #undef DRM_DEBUG
   #define DRM_DEBUG_DEFAULT_ON 1
   #endif /* DRM_DEBUG */
   
   #if defined(DRM_LINUX) && DRM_LINUX && !defined(__amd64__)
   #include <sys/file.h>
   #include <sys/proc.h>
   #include <machine/../linux/linux.h>
   #include <machine/../linux/linux_proto.h>
   #else
   /* Either it was defined when it shouldn't be (FreeBSD amd64) or it isn't
    * supported on this OS yet.
    */
   #undef DRM_LINUX
   #define DRM_LINUX 0
   #endif
   
   /* driver capabilities and requirements mask */
   #define DRIVER_USE_AGP     0x1
   #define DRIVER_REQUIRE_AGP 0x2
   #define DRIVER_USE_MTRR    0x4
   #define DRIVER_PCI_DMA     0x8
   #define DRIVER_SG          0x10
   #define DRIVER_HAVE_DMA    0x20
   #define DRIVER_HAVE_IRQ    0x40
   #define DRIVER_DMA_QUEUE   0x100
   
   
   #define DRM_HASH_SIZE         16 /* Size of key hash table                */
   #define DRM_KERNEL_CONTEXT    0  /* Change drm_resctx if changed          */
   #define DRM_RESERVED_CONTEXTS 1  /* Change drm_resctx if changed          */
   
   MALLOC_DECLARE(DRM_MEM_DMA);
   MALLOC_DECLARE(DRM_MEM_SAREA);
   MALLOC_DECLARE(DRM_MEM_DRIVER);
   MALLOC_DECLARE(DRM_MEM_MAGIC);
   MALLOC_DECLARE(DRM_MEM_IOCTLS);
   MALLOC_DECLARE(DRM_MEM_MAPS);
   MALLOC_DECLARE(DRM_MEM_BUFS);
   MALLOC_DECLARE(DRM_MEM_SEGS);
   MALLOC_DECLARE(DRM_MEM_PAGES);
   MALLOC_DECLARE(DRM_MEM_FILES);
   MALLOC_DECLARE(DRM_MEM_QUEUES);
   MALLOC_DECLARE(DRM_MEM_CMDS);
   MALLOC_DECLARE(DRM_MEM_MAPPINGS);
   MALLOC_DECLARE(DRM_MEM_BUFLISTS);
   MALLOC_DECLARE(DRM_MEM_AGPLISTS);
   MALLOC_DECLARE(DRM_MEM_CTXBITMAP);
   MALLOC_DECLARE(DRM_MEM_SGLISTS);
   MALLOC_DECLARE(DRM_MEM_DRAWABLE);
   MALLOC_DECLARE(DRM_MEM_MM);
   MALLOC_DECLARE(DRM_MEM_HASHTAB);
   
   SYSCTL_DECL(_hw_drm);
   
   #define DRM_MAX_CTXBITMAP (PAGE_SIZE * 8)
   
                                   /* Internal types and structures */
   #define DRM_ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
   #define DRM_MIN(a,b) ((a)<(b)?(a):(b))
   #define DRM_MAX(a,b) ((a)>(b)?(a):(b))
   
   #define DRM_IF_VERSION(maj, min) (maj << 16 | min)
   
   #define __OS_HAS_AGP    1
   
   #define DRM_DEV_MODE    (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP)
   #define DRM_DEV_UID     0
   #define DRM_DEV_GID     0
   
   #define wait_queue_head_t       atomic_t
   #define DRM_WAKEUP(w)           wakeup((void *)w)
   #define DRM_WAKEUP_INT(w)       wakeup(w)
   #define DRM_INIT_WAITQUEUE(queue) do {(void)(queue);} while (0)
   
   #define DRM_CURPROC             curthread
   #define DRM_STRUCTPROC          struct thread
   #define DRM_SPINTYPE            struct mtx
   #define DRM_SPININIT(l,name)    mtx_init(l, name, NULL, MTX_DEF)
   #define DRM_SPINUNINIT(l)       mtx_destroy(l)
   #define DRM_SPINLOCK(l)         mtx_lock(l)
   #define DRM_SPINUNLOCK(u)       mtx_unlock(u)
   #define DRM_SPINLOCK_IRQSAVE(l, irqflags) do {          \
           mtx_lock(l);                                    \
           (void)irqflags;                                 \
   } while (0)
   #define DRM_SPINUNLOCK_IRQRESTORE(u, irqflags) mtx_unlock(u)
   #define DRM_SPINLOCK_ASSERT(l)  mtx_assert(l, MA_OWNED)
   #define DRM_CURRENTPID          curthread->td_proc->p_pid
   #define DRM_LOCK()              mtx_lock(&dev->dev_lock)
   #define DRM_UNLOCK()            mtx_unlock(&dev->dev_lock)
   #define DRM_SYSCTL_HANDLER_ARGS (SYSCTL_HANDLER_ARGS)
   
   #define DRM_IRQ_ARGS            void *arg
   typedef void                    irqreturn_t;
   #define IRQ_HANDLED             /* nothing */
   #define IRQ_NONE                /* nothing */
   
   #define unlikely(x)            __builtin_expect(!!(x), 0)
   #define container_of(ptr, type, member) ({                      \
           __typeof( ((type *)0)->member ) *__mptr = (ptr);        \
           (type *)( (char *)__mptr - offsetof(type,member) );})
   
   enum {
           DRM_IS_NOT_AGP,
           DRM_IS_AGP,
           DRM_MIGHT_BE_AGP
   };
   #define DRM_AGP_MEM             struct agp_memory_info
   
   #define drm_get_device_from_kdev(_kdev) (_kdev->si_drv1)
   
   #define PAGE_ALIGN(addr) round_page(addr)
   /* DRM_SUSER returns true if the user is superuser */
   #if __FreeBSD_version >= 700000
   #define DRM_SUSER(p)            (priv_check(p, PRIV_DRIVER) == 0)
   #else
   #define DRM_SUSER(p)            (suser(p) == 0)
   #endif
   #define DRM_AGP_FIND_DEVICE()   agp_find_device()
   #define DRM_MTRR_WC             MDF_WRITECOMBINE
   #define jiffies                 ticks
   
   typedef vm_paddr_t dma_addr_t;
   typedef u_int64_t u64;
   typedef u_int32_t u32;
   typedef u_int16_t u16;
   typedef u_int8_t u8;
   
   /* DRM_READMEMORYBARRIER() prevents reordering of reads.
    * DRM_WRITEMEMORYBARRIER() prevents reordering of writes.
    * DRM_MEMORYBARRIER() prevents reordering of reads and writes.
    */
   #define DRM_READMEMORYBARRIER()         rmb()
   #define DRM_WRITEMEMORYBARRIER()        wmb()
   #define DRM_MEMORYBARRIER()             mb()
   
   #define DRM_READ8(map, offset)                                          \
           *(volatile u_int8_t *)(((vm_offset_t)(map)->virtual) +          \
               (vm_offset_t)(offset))
   #define DRM_READ16(map, offset)                                         \
           le16toh(*(volatile u_int16_t *)(((vm_offset_t)(map)->virtual) + \
               (vm_offset_t)(offset)))
   #define DRM_READ32(map, offset)                                         \
           le32toh(*(volatile u_int32_t *)(((vm_offset_t)(map)->virtual) + \
               (vm_offset_t)(offset)))
   #define DRM_WRITE8(map, offset, val)                                    \
           *(volatile u_int8_t *)(((vm_offset_t)(map)->virtual) +          \
               (vm_offset_t)(offset)) = val
   #define DRM_WRITE16(map, offset, val)                                   \
           *(volatile u_int16_t *)(((vm_offset_t)(map)->virtual) +         \
               (vm_offset_t)(offset)) = htole16(val)
   #define DRM_WRITE32(map, offset, val)                                   \
           *(volatile u_int32_t *)(((vm_offset_t)(map)->virtual) +         \
               (vm_offset_t)(offset)) = htole32(val)
   
   #define DRM_VERIFYAREA_READ( uaddr, size )              \
           (!useracc(__DECONST(caddr_t, uaddr), size, VM_PROT_READ))
   
   #define DRM_COPY_TO_USER(user, kern, size) \
           copyout(kern, user, size)
   #define DRM_COPY_FROM_USER(kern, user, size) \
           copyin(user, kern, size)
   #define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3)  \
           copyin(arg2, arg1, arg3)
   #define DRM_COPY_TO_USER_UNCHECKED(arg1, arg2, arg3)    \
           copyout(arg2, arg1, arg3)
   #define DRM_GET_USER_UNCHECKED(val, uaddr)              \
           ((val) = fuword32(uaddr), 0)
   
   #define cpu_to_le32(x) htole32(x)
   #define le32_to_cpu(x) le32toh(x)
   
   #define DRM_HZ                  hz
   #define DRM_UDELAY(udelay)      DELAY(udelay)
   #define DRM_TIME_SLICE          (hz/20)  /* Time slice for GLXContexts    */
   
   #define DRM_GET_PRIV_SAREA(_dev, _ctx, _map) do {       \
           (_map) = (_dev)->context_sareas[_ctx];          \
   } while(0)
   
   #define LOCK_TEST_WITH_RETURN(dev, file_priv)                           \
   do {                                                                    \
           if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) ||              \
                dev->lock.file_priv != file_priv) {                        \
                   DRM_ERROR("%s called without lock held\n",              \
                              __FUNCTION__);                               \
                   return EINVAL;                                          \
           }                                                               \
   } while (0)
   
   /* Returns -errno to shared code */
   #define DRM_WAIT_ON( ret, queue, timeout, condition )           \
   for ( ret = 0 ; !ret && !(condition) ; ) {                      \
           DRM_UNLOCK();                                           \
           mtx_lock(&dev->irq_lock);                               \
           if (!(condition))                                       \
               ret = -mtx_sleep(&(queue), &dev->irq_lock,          \
                   PCATCH, "drmwtq", (timeout));                   \
           mtx_unlock(&dev->irq_lock);                             \
           DRM_LOCK();                                             \
   }
   
   #define DRM_ERROR(fmt, ...) \
           printf("error: [" DRM_NAME ":pid%d:%s] *ERROR* " fmt,           \
               DRM_CURRENTPID, __func__ , ##__VA_ARGS__)
   
   #define DRM_INFO(fmt, ...)  printf("info: [" DRM_NAME "] " fmt , ##__VA_ARGS__)
   
   #define DRM_DEBUG(fmt, ...) do {                                        \
           if (drm_debug_flag)                                             \
                   printf("[" DRM_NAME ":pid%d:%s] " fmt, DRM_CURRENTPID,  \
                           __func__ , ##__VA_ARGS__);                      \
   } while (0)
   
   typedef struct drm_pci_id_list
   {
           int vendor;
           int device;
           long driver_private;
           char *name;
   } drm_pci_id_list_t;
   
   struct drm_msi_blacklist_entry
   {
           int vendor;
           int device;
   };
   
   #define DRM_AUTH        0x1
   #define DRM_MASTER      0x2
   #define DRM_ROOT_ONLY   0x4
   typedef struct drm_ioctl_desc {
           unsigned long cmd;
           int (*func)(struct drm_device *dev, void *data,
                       struct drm_file *file_priv);
           int flags;
   } drm_ioctl_desc_t;
   /**
    * Creates a driver or general drm_ioctl_desc array entry for the given
    * ioctl, for use by drm_ioctl().
    */
   #define DRM_IOCTL_DEF(ioctl, func, flags) \
           [DRM_IOCTL_NR(ioctl)] = {ioctl, func, flags}
   
   typedef struct drm_magic_entry {
           drm_magic_t            magic;
           struct drm_file        *priv;
           struct drm_magic_entry *next;
   } drm_magic_entry_t;
   
   typedef struct drm_magic_head {
           struct drm_magic_entry *head;
           struct drm_magic_entry *tail;
   } drm_magic_head_t;
   
   typedef struct drm_buf {
           int               idx;         /* Index into master buflist          */
           int               total;       /* Buffer size                        */
           int               order;       /* log-base-2(total)                  */
           int               used;        /* Amount of buffer in use (for DMA)  */
           unsigned long     offset;      /* Byte offset (used internally)      */
           void              *address;    /* Address of buffer                  */
           unsigned long     bus_address; /* Bus address of buffer              */
           struct drm_buf    *next;       /* Kernel-only: used for free list    */
           __volatile__ int  pending;     /* On hardware DMA queue              */
           struct drm_file   *file_priv;  /* Unique identifier of holding process */
           int               context;     /* Kernel queue for this buffer       */
           enum {
                   DRM_LIST_NONE    = 0,
                   DRM_LIST_FREE    = 1,
                   DRM_LIST_WAIT    = 2,
                   DRM_LIST_PEND    = 3,
                   DRM_LIST_PRIO    = 4,
                   DRM_LIST_RECLAIM = 5
           }                 list;        /* Which list we're on                */
   
           int               dev_priv_size; /* Size of buffer private stoarge   */
           void              *dev_private;  /* Per-buffer private storage       */
   } drm_buf_t;
   
   typedef struct drm_freelist {
           int               initialized; /* Freelist in use                  */
           atomic_t          count;       /* Number of free buffers           */
           drm_buf_t         *next;       /* End pointer                      */
   
           int               low_mark;    /* Low water mark                   */
           int               high_mark;   /* High water mark                  */
   } drm_freelist_t;
   
   typedef struct drm_dma_handle {
           void *vaddr;
           bus_addr_t busaddr;
           bus_dma_tag_t tag;
           bus_dmamap_t map;
   } drm_dma_handle_t;
   
   typedef struct drm_buf_entry {
           int               buf_size;
           int               buf_count;
           drm_buf_t         *buflist;
           int               seg_count;
           drm_dma_handle_t  **seglist;
           int               page_order;
   
           drm_freelist_t    freelist;
   } drm_buf_entry_t;
   
   typedef TAILQ_HEAD(drm_file_list, drm_file) drm_file_list_t;
   struct drm_file {
           TAILQ_ENTRY(drm_file) link;
           struct drm_device *dev;
           int               authenticated;
           int               master;
           pid_t             pid;
           uid_t             uid;
           drm_magic_t       magic;
           unsigned long     ioctl_count;
           void             *driver_priv;
   };
   
   typedef struct drm_lock_data {
           struct drm_hw_lock      *hw_lock;       /* Hardware lock                   */
           struct drm_file   *file_priv;   /* Unique identifier of holding process (NULL is kernel)*/
           int               lock_queue;   /* Queue of blocked processes      */
           unsigned long     lock_time;    /* Time of last lock in jiffies    */
   } drm_lock_data_t;
   
   /* This structure, in the struct drm_device, is always initialized while the
    * device
    * is open.  dev->dma_lock protects the incrementing of dev->buf_use, which
    * when set marks that no further bufs may be allocated until device teardown
    * occurs (when the last open of the device has closed).  The high/low
    * watermarks of bufs are only touched by the X Server, and thus not
    * concurrently accessed, so no locking is needed.
    */
   typedef struct drm_device_dma {
           drm_buf_entry_t   bufs[DRM_MAX_ORDER+1];
           int               buf_count;
           drm_buf_t         **buflist;    /* Vector of pointers info bufs    */
           int               seg_count;
           int               page_count;
           unsigned long     *pagelist;
           unsigned long     byte_count;
           enum {
                   _DRM_DMA_USE_AGP = 0x01,
                   _DRM_DMA_USE_SG  = 0x02
           } flags;
   } drm_device_dma_t;
   
   typedef struct drm_agp_mem {
           void               *handle;
           unsigned long      bound; /* address */
           int                pages;
           struct drm_agp_mem *prev;
           struct drm_agp_mem *next;
   } drm_agp_mem_t;
   
   typedef struct drm_agp_head {
           device_t           agpdev;
           struct agp_info    info;
           const char         *chipset;
           drm_agp_mem_t      *memory;
           unsigned long      mode;
           int                enabled;
           int                acquired;
           unsigned long      base;
           int                mtrr;
           int                cant_use_aperture;
           unsigned long      page_mask;
   } drm_agp_head_t;
   
   typedef struct drm_sg_mem {
           vm_offset_t vaddr;
           vm_paddr_t *busaddr;
           vm_pindex_t pages;
   } drm_sg_mem_t;
   
   #define DRM_MAP_HANDLE_BITS     (sizeof(void *) == 4 ? 4 : 24)
   #define DRM_MAP_HANDLE_SHIFT    (sizeof(void *) * 8 - DRM_MAP_HANDLE_BITS)
   typedef TAILQ_HEAD(drm_map_list, drm_local_map) drm_map_list_t;
   
   typedef struct drm_local_map {
           unsigned long offset;     /* Physical address (0 for SAREA)       */
           unsigned long size;       /* Physical size (bytes)                */
           enum drm_map_type type;   /* Type of memory mapped                */
           enum drm_map_flags flags; /* Flags                                */
           void *handle;             /* User-space: "Handle" to pass to mmap */
                                     /* Kernel-space: kernel-virtual address */
           int mtrr;                 /* Boolean: MTRR used                   */
                                     /* Private data                         */
           int rid;                  /* PCI resource ID for bus_space        */
           void *virtual;            /* Kernel-space: kernel-virtual address */
           struct resource *bsr;
           bus_space_tag_t bst;
           bus_space_handle_t bsh;
           drm_dma_handle_t *dmah;
           TAILQ_ENTRY(drm_local_map) link;
   } drm_local_map_t;
   
   struct drm_vblank_info {
           wait_queue_head_t queue;        /* vblank wait queue */
           atomic_t count;                 /* number of VBLANK interrupts */
                                           /* (driver must alloc the right number of counters) */
           atomic_t refcount;              /* number of users of vblank interrupts */
           u32 last;                       /* protected by dev->vbl_lock, used */
                                           /* for wraparound handling */
           int enabled;                    /* so we don't call enable more than */
                                           /* once per disable */
           int inmodeset;                  /* Display driver is setting mode */
   };
   
   /* location of GART table */
   #define DRM_ATI_GART_MAIN 1
   #define DRM_ATI_GART_FB   2
   
   #define DRM_ATI_GART_PCI  1
   #define DRM_ATI_GART_PCIE 2
   #define DRM_ATI_GART_IGP  3
   
   struct drm_ati_pcigart_info {
           int gart_table_location;
           int gart_reg_if;
           void *addr;
           dma_addr_t bus_addr;
           dma_addr_t table_mask;
           dma_addr_t member_mask;
           struct drm_dma_handle *table_handle;
           drm_local_map_t mapping;
           int table_size;
           struct drm_dma_handle *dmah; /* handle for ATI PCIGART table */
   };
   
   #ifndef DMA_BIT_MASK
   #define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : (1ULL<<(n)) - 1)
   #endif
   
   #define upper_32_bits(n) ((u32)(((n) >> 16) >> 16))
   
   struct drm_driver_info {
           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 *);
           void    (*reclaim_buffers_locked)(struct drm_device *,
                                             struct drm_file *file_priv);
           int     (*dma_ioctl)(struct drm_device *dev, void *data,
                                struct drm_file *file_priv);
           void    (*dma_ready)(struct drm_device *);
           int     (*dma_quiescent)(struct drm_device *);
           int     (*dma_flush_block_and_flush)(struct drm_device *, int context,
                                                enum drm_lock_flags flags);
           int     (*dma_flush_unblock)(struct drm_device *, int context,
                                        enum drm_lock_flags flags);
           int     (*context_ctor)(struct drm_device *dev, int context);
           int     (*context_dtor)(struct drm_device *dev, int context);
           int     (*kernel_context_switch)(struct drm_device *dev, int old,
                                            int new);
           int     (*kernel_context_switch_unlock)(struct drm_device *dev);
           void    (*irq_preinstall)(struct drm_device *dev);
           int     (*irq_postinstall)(struct drm_device *dev);
           void    (*irq_uninstall)(struct drm_device *dev);
           void    (*irq_handler)(DRM_IRQ_ARGS);
           u32     (*get_vblank_counter)(struct drm_device *dev, int crtc);
           int     (*enable_vblank)(struct drm_device *dev, int crtc);
           void    (*disable_vblank)(struct drm_device *dev, int crtc);
   
           drm_pci_id_list_t *id_entry;    /* PCI ID, name, and chipset private */
   
           /**
            * 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);
   
           drm_ioctl_desc_t *ioctls;
           int     max_ioctl;
   
           int     buf_priv_size;
   
           int     major;
           int     minor;
           int     patchlevel;
           const char *name;               /* Simple driver name              */
           const char *desc;               /* Longer driver name              */
           const char *date;               /* Date of last major changes.     */
   
           u32 driver_features;
   };
   
   /* Length for the array of resource pointers for drm_get_resource_*. */
   #define DRM_MAX_PCI_RESOURCE    6
   
   /** 
    * DRM device functions structure
    */
   struct drm_device {
           struct drm_driver_info *driver;
           drm_pci_id_list_t *id_entry;    /* PCI ID, name, and chipset private */
   
           u_int16_t pci_device;           /* PCI device id */
           u_int16_t pci_vendor;           /* PCI vendor id */
   
           char              *unique;      /* Unique identifier: e.g., busid  */
           int               unique_len;   /* Length of unique field          */
           device_t          device;       /* Device instance from newbus     */
           struct cdev       *devnode;     /* Device number for mknod         */
           int               if_version;   /* Highest interface version set */
   
           int               flags;        /* Flags to open(2)                */
   
                                   /* Locks */
           struct mtx        vbl_lock;     /* protects vblank operations */
           struct mtx        dma_lock;     /* protects dev->dma */
           struct mtx        irq_lock;     /* protects irq condition checks */
           struct mtx        dev_lock;     /* protects everything else */
           DRM_SPINTYPE      drw_lock;
   
                                   /* Usage Counters */
           int               open_count;   /* Outstanding files open          */
           int               buf_use;      /* Buffers in use -- cannot alloc  */
   
                                   /* Performance counters */
           unsigned long     counters;
           enum drm_stat_type      types[15];
           atomic_t          counts[15];
   
                                   /* Authentication */
           drm_file_list_t   files;
           drm_magic_head_t  magiclist[DRM_HASH_SIZE];
   
           /* Linked list of mappable regions. Protected by dev_lock */
           drm_map_list_t    maplist;
           struct unrhdr     *map_unrhdr;
   
           drm_local_map_t   **context_sareas;
           int               max_context;
   
           drm_lock_data_t   lock;         /* Information on hardware lock    */
   
                                   /* DMA queues (contexts) */
           drm_device_dma_t  *dma;         /* Optional pointer for DMA support */
   
                                   /* Context support */
           int               irq;          /* Interrupt used by board         */
           int               irq_enabled;  /* True if the irq handler is enabled */
           int               msi_enabled;  /* MSI enabled */
           int               irqrid;       /* Interrupt used by board */
           struct resource   *irqr;        /* Resource for interrupt used by board    */
           void              *irqh;        /* Handle from bus_setup_intr      */
   
           /* Storage of resource pointers for drm_get_resource_* */
           struct resource   *pcir[DRM_MAX_PCI_RESOURCE];
           int               pcirid[DRM_MAX_PCI_RESOURCE];
   
           int               pci_domain;
           int               pci_bus;
           int               pci_slot;
           int               pci_func;
   
           atomic_t          context_flag; /* Context swapping flag           */
           int               last_context; /* Last current context            */
   
           int               vblank_disable_allowed;
           struct callout    vblank_disable_timer;
           u32               max_vblank_count;     /* size of vblank counter register */
           struct drm_vblank_info *vblank;         /* per crtc vblank info */
           int               num_crtcs;
   
           struct sigio      *buf_sigio;   /* Processes waiting for SIGIO     */
   
                                   /* Sysctl support */
           struct drm_sysctl_info *sysctl;
   
           drm_agp_head_t    *agp;
           drm_sg_mem_t      *sg;  /* Scatter gather memory */
           atomic_t          *ctx_bitmap;
           void              *dev_private;
           unsigned int      agp_buffer_token;
           drm_local_map_t   *agp_buffer_map;
   
           struct unrhdr     *drw_unrhdr;
           /* RB tree of drawable infos */
           RB_HEAD(drawable_tree, bsd_drm_drawable_info) drw_head;
   };
   
   static __inline__ int drm_core_check_feature(struct drm_device *dev,
                                                int feature)
   {
           return ((dev->driver->driver_features & feature) ? 1 : 0);
   }
   
   #if __OS_HAS_AGP
   static inline int drm_core_has_AGP(struct drm_device *dev)
   {
           return drm_core_check_feature(dev, DRIVER_USE_AGP);
   }
   #else
   #define drm_core_has_AGP(dev) (0)
   #endif
   
   extern int      drm_debug_flag;
   
   /* Device setup support (drm_drv.c) */
   int     drm_probe(device_t kdev, drm_pci_id_list_t *idlist);
   int     drm_attach(device_t kdev, drm_pci_id_list_t *idlist);
   void    drm_close(void *data);
   int     drm_detach(device_t kdev);
   d_ioctl_t drm_ioctl;
   d_open_t drm_open;
   d_read_t drm_read;
   d_poll_t drm_poll;
   d_mmap_t drm_mmap;
   extern drm_local_map_t  *drm_getsarea(struct drm_device *dev);
   
   /* File operations helpers (drm_fops.c) */
   extern int              drm_open_helper(struct cdev *kdev, int flags, int fmt,
                                            DRM_STRUCTPROC *p,
                                           struct drm_device *dev);
   
   /* Memory management support (drm_memory.c) */
   void    drm_mem_init(void);
   void    drm_mem_uninit(void);
   void    *drm_ioremap_wc(struct drm_device *dev, drm_local_map_t *map);
   void    *drm_ioremap(struct drm_device *dev, drm_local_map_t *map);
   void    drm_ioremapfree(drm_local_map_t *map);
   int     drm_mtrr_add(unsigned long offset, size_t size, int flags);
   int     drm_mtrr_del(int handle, unsigned long offset, size_t size, int flags);
   
   int     drm_context_switch(struct drm_device *dev, int old, int new);
   int     drm_context_switch_complete(struct drm_device *dev, int new);
   
   int     drm_ctxbitmap_init(struct drm_device *dev);
   void    drm_ctxbitmap_cleanup(struct drm_device *dev);
   void    drm_ctxbitmap_free(struct drm_device *dev, int ctx_handle);
   int     drm_ctxbitmap_next(struct drm_device *dev);
   
   /* Locking IOCTL support (drm_lock.c) */
   int     drm_lock_take(struct drm_lock_data *lock_data,
                         unsigned int context);
   int     drm_lock_transfer(struct drm_lock_data *lock_data,
                             unsigned int context);
   int     drm_lock_free(struct drm_lock_data *lock_data,
                         unsigned int context);
   
   /* Buffer management support (drm_bufs.c) */
   unsigned long drm_get_resource_start(struct drm_device *dev,
                                        unsigned int resource);
   unsigned long drm_get_resource_len(struct drm_device *dev,
                                      unsigned int resource);
   void    drm_rmmap(struct drm_device *dev, drm_local_map_t *map);
   int     drm_order(unsigned long size);
   int     drm_addmap(struct drm_device *dev, unsigned long offset,
                      unsigned long size,
                      enum drm_map_type type, enum drm_map_flags flags,
                      drm_local_map_t **map_ptr);
   int     drm_addbufs_pci(struct drm_device *dev, struct drm_buf_desc *request);
   int     drm_addbufs_sg(struct drm_device *dev, struct drm_buf_desc *request);
   int     drm_addbufs_agp(struct drm_device *dev, struct drm_buf_desc *request);
   
   /* DMA support (drm_dma.c) */
   int     drm_dma_setup(struct drm_device *dev);
   void    drm_dma_takedown(struct drm_device *dev);
   void    drm_free_buffer(struct drm_device *dev, drm_buf_t *buf);
   void    drm_reclaim_buffers(struct drm_device *dev, struct drm_file *file_priv);
   #define drm_core_reclaim_buffers drm_reclaim_buffers
   
   /* IRQ support (drm_irq.c) */
   int     drm_irq_install(struct drm_device *dev);
   int     drm_irq_uninstall(struct drm_device *dev);
   irqreturn_t drm_irq_handler(DRM_IRQ_ARGS);
   void    drm_driver_irq_preinstall(struct drm_device *dev);
   void    drm_driver_irq_postinstall(struct drm_device *dev);
   void    drm_driver_irq_uninstall(struct drm_device *dev);
   void    drm_handle_vblank(struct drm_device *dev, int crtc);
   u32     drm_vblank_count(struct drm_device *dev, int crtc);
   int     drm_vblank_get(struct drm_device *dev, int crtc);
   void    drm_vblank_put(struct drm_device *dev, int crtc);
   void    drm_vblank_cleanup(struct drm_device *dev);
   int     drm_vblank_wait(struct drm_device *dev, unsigned int *vbl_seq);
   int     drm_vblank_init(struct drm_device *dev, int num_crtcs);
   int     drm_modeset_ctl(struct drm_device *dev, void *data,
                           struct drm_file *file_priv);
   
   /* AGP/PCI Express/GART support (drm_agpsupport.c) */
   int     drm_device_is_agp(struct drm_device *dev);
   int     drm_device_is_pcie(struct drm_device *dev);
   drm_agp_head_t *drm_agp_init(void);
   int     drm_agp_acquire(struct drm_device *dev);
   int     drm_agp_release(struct drm_device *dev);
   int     drm_agp_info(struct drm_device * dev, struct drm_agp_info *info);
   int     drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode);
   void    *drm_agp_allocate_memory(size_t pages, u32 type);
   int     drm_agp_free_memory(void *handle);
   int     drm_agp_bind_memory(void *handle, off_t start);
   int     drm_agp_unbind_memory(void *handle);
   int     drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request);
   int     drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request);
   int     drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request);
   int     drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request);
   
   /* Scatter Gather Support (drm_scatter.c) */
   void    drm_sg_cleanup(drm_sg_mem_t *entry);
   int     drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request);
   
   /* sysctl support (drm_sysctl.h) */
   extern int              drm_sysctl_init(struct drm_device *dev);
   extern int              drm_sysctl_cleanup(struct drm_device *dev);
   
   /* ATI PCIGART support (ati_pcigart.c) */
   int     drm_ati_pcigart_init(struct drm_device *dev,
                                   struct drm_ati_pcigart_info *gart_info);
   int     drm_ati_pcigart_cleanup(struct drm_device *dev,
                                   struct drm_ati_pcigart_info *gart_info);
   
   /* Locking IOCTL support (drm_drv.c) */
   int     drm_lock(struct drm_device *dev, void *data,
                    struct drm_file *file_priv);
   int     drm_unlock(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
   int     drm_version(struct drm_device *dev, void *data,
                       struct drm_file *file_priv);
   int     drm_setversion(struct drm_device *dev, void *data,
                          struct drm_file *file_priv);
   
   /* Misc. IOCTL support (drm_ioctl.c) */
   int     drm_irq_by_busid(struct drm_device *dev, void *data,
                            struct drm_file *file_priv);
   int     drm_getunique(struct drm_device *dev, void *data,
                         struct drm_file *file_priv);
   int     drm_setunique(struct drm_device *dev, void *data,
                         struct drm_file *file_priv);
   int     drm_getmap(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
   int     drm_getclient(struct drm_device *dev, void *data,
                         struct drm_file *file_priv);
   int     drm_getstats(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);
   int     drm_noop(struct drm_device *dev, void *data,
                    struct drm_file *file_priv);
   
   /* Context IOCTL support (drm_context.c) */
   int     drm_resctx(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
   int     drm_addctx(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
   int     drm_modctx(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
   int     drm_getctx(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
   int     drm_switchctx(struct drm_device *dev, void *data,
                         struct drm_file *file_priv);
   int     drm_newctx(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
   int     drm_rmctx(struct drm_device *dev, void *data,
                     struct drm_file *file_priv);
   int     drm_setsareactx(struct drm_device *dev, void *data,
                           struct drm_file *file_priv);
   int     drm_getsareactx(struct drm_device *dev, void *data,
                           struct drm_file *file_priv);
   
   /* Drawable IOCTL support (drm_drawable.c) */
   int     drm_adddraw(struct drm_device *dev, void *data,
                       struct drm_file *file_priv);
   int     drm_rmdraw(struct drm_device *dev, void *data,
                      struct drm_file *file_priv);
   int     drm_update_draw(struct drm_device *dev, void *data,
                           struct drm_file *file_priv);
   struct drm_drawable_info *drm_get_drawable_info(struct drm_device *dev,
                                                   int handle);
   
   /* Drawable support (drm_drawable.c) */
   void drm_drawable_free_all(struct drm_device *dev);
   
   /* Authentication IOCTL support (drm_auth.c) */
   int     drm_getmagic(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);
   int     drm_authmagic(struct drm_device *dev, void *data,
                         struct drm_file *file_priv);
   
   /* Buffer management support (drm_bufs.c) */
   int     drm_addmap_ioctl(struct drm_device *dev, void *data,
                            struct drm_file *file_priv);
   int     drm_rmmap_ioctl(struct drm_device *dev, void *data,
                           struct drm_file *file_priv);
   int     drm_addbufs(struct drm_device *dev, void *data,
                       struct drm_file *file_priv);
   int     drm_infobufs(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);
   int     drm_markbufs(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);
   int     drm_freebufs(struct drm_device *dev, void *data,
                        struct drm_file *file_priv);
   int     drm_mapbufs(struct drm_device *dev, void *data,
                       struct drm_file *file_priv);
   
   /* DMA support (drm_dma.c) */
   int     drm_dma(struct drm_device *dev, void *data, struct drm_file *file_priv);
   
   /* IRQ support (drm_irq.c) */
   int     drm_control(struct drm_device *dev, void *data,
                       struct drm_file *file_priv);
   int     drm_wait_vblank(struct drm_device *dev, void *data,
                           struct drm_file *file_priv);
   
   /* AGP/GART support (drm_agpsupport.c) */
   int     drm_agp_acquire_ioctl(struct drm_device *dev, void *data,
                                 struct drm_file *file_priv);
   int     drm_agp_release_ioctl(struct drm_device *dev, void *data,
                                 struct drm_file *file_priv);
   int     drm_agp_enable_ioctl(struct drm_device *dev, void *data,
                                struct drm_file *file_priv);
   int     drm_agp_info_ioctl(struct drm_device *dev, void *data,
                              struct drm_file *file_priv);
   int     drm_agp_alloc_ioctl(struct drm_device *dev, void *data,
                               struct drm_file *file_priv);
   int     drm_agp_free_ioctl(struct drm_device *dev, void *data,
                              struct drm_file *file_priv);
   int     drm_agp_unbind_ioctl(struct drm_device *dev, void *data,
                                struct drm_file *file_priv);
   int     drm_agp_bind_ioctl(struct drm_device *dev, void *data,
                              struct drm_file *file_priv);
   
   /* Scatter Gather Support (drm_scatter.c) */
   int     drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
                              struct drm_file *file_priv);
   int     drm_sg_free(struct drm_device *dev, void *data,
                       struct drm_file *file_priv);
   
   /* consistent PCI memory functions (drm_pci.c) */
   drm_dma_handle_t *drm_pci_alloc(struct drm_device *dev, size_t size,
                                   size_t align, dma_addr_t maxaddr);
   void    drm_pci_free(struct drm_device *dev, drm_dma_handle_t *dmah);
   
   /* Inline replacements for drm_alloc and friends */
   static __inline__ void *
   drm_alloc(size_t size, struct malloc_type *area)
   {
           return malloc(size, area, M_NOWAIT);
   }
   
   static __inline__ void *
   drm_calloc(size_t nmemb, size_t size, struct malloc_type *area)
   {
           return malloc(size * nmemb, area, M_NOWAIT | M_ZERO);
   }
   
   static __inline__ void *
   drm_realloc(void *oldpt, size_t oldsize, size_t size,
       struct malloc_type *area)
   {
           return reallocf(oldpt, size, area, M_NOWAIT);
   }
   
   static __inline__ void
   drm_free(void *pt, size_t size, struct malloc_type *area)
   {
           free(pt, area);
   }
   
   /* Inline replacements for DRM_IOREMAP macros */
   static __inline__ void
   drm_core_ioremap_wc(struct drm_local_map *map, struct drm_device *dev)
   {
           map->virtual = drm_ioremap_wc(dev, map);
   }
   static __inline__ void
   drm_core_ioremap(struct drm_local_map *map, struct drm_device *dev)
   {
           map->virtual = drm_ioremap(dev, map);
   }
   static __inline__ void
   drm_core_ioremapfree(struct drm_local_map *map, struct drm_device *dev)
   {
           if ( map->virtual && map->size )
                   drm_ioremapfree(map);
   }
   
   static __inline__ struct drm_local_map *
   drm_core_findmap(struct drm_device *dev, unsigned long offset)
  {
          drm_local_map_t *map;
  
          DRM_SPINLOCK_ASSERT(&dev->dev_lock);
          TAILQ_FOREACH(map, &dev->maplist, link) {
                  if (offset == (unsigned long)map->handle)
                          return map;
          }
          return NULL;
  }
  
  static __inline__ void drm_core_dropmap(struct drm_map *map)
  {
  }
  
  #endif /* __KERNEL__ */
  #endif /* _DRM_P_H_ */

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