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0001 /**
0002  * \file xf86drm.h 
0003  * OS-independent header for DRM user-level library interface.
0004  *
0005  * \author Rickard E. (Rik) Faith <faith@valinux.com>
0006  */
0007  
0008 /*
0009  * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
0010  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
0011  * All Rights Reserved.
0012  *
0013  * Permission is hereby granted, free of charge, to any person obtaining a
0014  * copy of this software and associated documentation files (the "Software"),
0015  * to deal in the Software without restriction, including without limitation
0016  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0017  * and/or sell copies of the Software, and to permit persons to whom the
0018  * Software is furnished to do so, subject to the following conditions:
0019  *
0020  * The above copyright notice and this permission notice (including the next
0021  * paragraph) shall be included in all copies or substantial portions of the
0022  * Software.
0023  *
0024  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0025  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0026  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0027  * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
0028  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0029  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
0030  * DEALINGS IN THE SOFTWARE.
0031  *
0032  */
0033 
0034 #ifndef _XF86DRM_H_
0035 #define _XF86DRM_H_
0036 
0037 #include <stdarg.h>
0038 #include <sys/types.h>
0039 #include <stdint.h>
0040 #include <drm.h>
0041 
0042 #if defined(__cplusplus)
0043 extern "C" {
0044 #endif
0045 
0046 #ifndef DRM_MAX_MINOR
0047 #define DRM_MAX_MINOR   64 /* deprecated */
0048 #endif
0049 
0050 #if defined(__linux__)
0051 
0052 #define DRM_IOCTL_NR(n)     _IOC_NR(n)
0053 #define DRM_IOC_VOID        _IOC_NONE
0054 #define DRM_IOC_READ        _IOC_READ
0055 #define DRM_IOC_WRITE       _IOC_WRITE
0056 #define DRM_IOC_READWRITE   _IOC_READ|_IOC_WRITE
0057 #define DRM_IOC(dir, group, nr, size) _IOC(dir, group, nr, size)
0058 
0059 #else /* One of the *BSDs */
0060 
0061 #include <sys/ioccom.h>
0062 #define DRM_IOCTL_NR(n)         ((n) & 0xff)
0063 #define DRM_IOC_VOID            IOC_VOID
0064 #define DRM_IOC_READ            IOC_OUT
0065 #define DRM_IOC_WRITE           IOC_IN
0066 #define DRM_IOC_READWRITE       IOC_INOUT
0067 #define DRM_IOC(dir, group, nr, size) _IOC(dir, group, nr, size)
0068 
0069 #endif
0070 
0071                 /* Defaults, if nothing set in xf86config */
0072 #define DRM_DEV_UID  0
0073 #define DRM_DEV_GID  0
0074 /* Default /dev/dri directory permissions 0755 */
0075 #define DRM_DEV_DIRMODE     \
0076     (S_IRUSR|S_IWUSR|S_IXUSR|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH)
0077 #define DRM_DEV_MODE     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP)
0078 
0079 #ifdef __OpenBSD__
0080 #define DRM_DIR_NAME  "/dev"
0081 #define DRM_PRIMARY_MINOR_NAME  "drm"
0082 #define DRM_CONTROL_MINOR_NAME  "drmC" /* deprecated */
0083 #define DRM_RENDER_MINOR_NAME   "drmR"
0084 #else
0085 #define DRM_DIR_NAME  "/dev/dri"
0086 #define DRM_PRIMARY_MINOR_NAME  "card"
0087 #define DRM_CONTROL_MINOR_NAME  "controlD" /* deprecated */
0088 #define DRM_RENDER_MINOR_NAME   "renderD"
0089 #define DRM_PROC_NAME "/proc/dri/" /* For backward Linux compatibility */
0090 #endif
0091 
0092 #define DRM_DEV_NAME          "%s/" DRM_PRIMARY_MINOR_NAME "%d"
0093 #define DRM_CONTROL_DEV_NAME  "%s/" DRM_CONTROL_MINOR_NAME "%d" /* deprecated */
0094 #define DRM_RENDER_DEV_NAME   "%s/" DRM_RENDER_MINOR_NAME  "%d"
0095 
0096 #define DRM_NODE_NAME_MAX \
0097     (sizeof(DRM_DIR_NAME) + 1 /* slash */ \
0098      + MAX3(sizeof(DRM_PRIMARY_MINOR_NAME), \
0099             sizeof(DRM_CONTROL_MINOR_NAME), \
0100             sizeof(DRM_RENDER_MINOR_NAME)) \
0101      + sizeof("1048575") /* highest possible node number 2^MINORBITS - 1 */ \
0102      + 1) /* NULL-terminator */
0103 
0104 #define DRM_ERR_NO_DEVICE  (-1001)
0105 #define DRM_ERR_NO_ACCESS  (-1002)
0106 #define DRM_ERR_NOT_ROOT   (-1003)
0107 #define DRM_ERR_INVALID    (-1004)
0108 #define DRM_ERR_NO_FD      (-1005)
0109 
0110 #define DRM_AGP_NO_HANDLE 0
0111 
0112 typedef unsigned int  drmSize,     *drmSizePtr;     /**< For mapped regions */
0113 typedef void          *drmAddress, **drmAddressPtr; /**< For mapped regions */
0114 
0115 #if (__GNUC__ >= 3)
0116 #define DRM_PRINTFLIKE(f, a) __attribute__ ((format(__printf__, f, a)))
0117 #else
0118 #define DRM_PRINTFLIKE(f, a)
0119 #endif
0120 
0121 typedef struct _drmServerInfo {
0122   int (*debug_print)(const char *format, va_list ap) DRM_PRINTFLIKE(1,0);
0123   int (*load_module)(const char *name);
0124   void (*get_perms)(gid_t *, mode_t *);
0125 } drmServerInfo, *drmServerInfoPtr;
0126 
0127 typedef struct drmHashEntry {
0128     int      fd;
0129     void     (*f)(int, void *, void *);
0130     void     *tagTable;
0131 } drmHashEntry;
0132 
0133 extern int drmIoctl(int fd, unsigned long request, void *arg);
0134 extern void *drmGetHashTable(void);
0135 extern drmHashEntry *drmGetEntry(int fd);
0136 
0137 /**
0138  * Driver version information.
0139  *
0140  * \sa drmGetVersion() and drmSetVersion().
0141  */
0142 typedef struct _drmVersion {
0143     int     version_major;        /**< Major version */
0144     int     version_minor;        /**< Minor version */
0145     int     version_patchlevel;   /**< Patch level */
0146     int     name_len;             /**< Length of name buffer */
0147     char    *name;            /**< Name of driver */
0148     int     date_len;             /**< Length of date buffer */
0149     char    *date;                /**< User-space buffer to hold date */
0150     int     desc_len;             /**< Length of desc buffer */
0151     char    *desc;                /**< User-space buffer to hold desc */
0152 } drmVersion, *drmVersionPtr;
0153 
0154 typedef struct _drmStats {
0155     unsigned long count;         /**< Number of data */
0156     struct {
0157     unsigned long value;         /**< Value from kernel */
0158     const char    *long_format;  /**< Suggested format for long_name */
0159     const char    *long_name;    /**< Long name for value */
0160     const char    *rate_format;  /**< Suggested format for rate_name */
0161     const char    *rate_name;    /**< Short name for value per second */
0162     int           isvalue;       /**< True if value (vs. counter) */
0163     const char    *mult_names;   /**< Multiplier names (e.g., "KGM") */
0164     int           mult;          /**< Multiplier value (e.g., 1024) */
0165     int           verbose;       /**< Suggest only in verbose output */
0166     } data[15];
0167 } drmStatsT;
0168 
0169 
0170                 /* All of these enums *MUST* match with the
0171                                    kernel implementation -- so do *NOT*
0172                                    change them!  (The drmlib implementation
0173                                    will just copy the flags instead of
0174                                    translating them.) */
0175 typedef enum {
0176     DRM_FRAME_BUFFER    = 0,      /**< WC, no caching, no core dump */
0177     DRM_REGISTERS       = 1,      /**< no caching, no core dump */
0178     DRM_SHM             = 2,      /**< shared, cached */
0179     DRM_AGP             = 3,      /**< AGP/GART */
0180     DRM_SCATTER_GATHER  = 4,      /**< PCI scatter/gather */
0181     DRM_CONSISTENT      = 5   /**< PCI consistent */
0182 } drmMapType;
0183 
0184 typedef enum {
0185     DRM_RESTRICTED      = 0x0001, /**< Cannot be mapped to client-virtual */
0186     DRM_READ_ONLY       = 0x0002, /**< Read-only in client-virtual */
0187     DRM_LOCKED          = 0x0004, /**< Physical pages locked */
0188     DRM_KERNEL          = 0x0008, /**< Kernel requires access */
0189     DRM_WRITE_COMBINING = 0x0010, /**< Use write-combining, if available */
0190     DRM_CONTAINS_LOCK   = 0x0020, /**< SHM page that contains lock */
0191     DRM_REMOVABLE   = 0x0040  /**< Removable mapping */
0192 } drmMapFlags;
0193 
0194 /**
0195  * \warning These values *MUST* match drm.h
0196  */
0197 typedef enum {
0198     /** \name Flags for DMA buffer dispatch */
0199     /*@{*/
0200     DRM_DMA_BLOCK        = 0x01, /**< 
0201                   * Block until buffer dispatched.
0202                   * 
0203                   * \note the buffer may not yet have been
0204                   * processed by the hardware -- getting a
0205                   * hardware lock with the hardware quiescent
0206                   * will ensure that the buffer has been
0207                   * processed.
0208                   */
0209     DRM_DMA_WHILE_LOCKED = 0x02, /**< Dispatch while lock held */
0210     DRM_DMA_PRIORITY     = 0x04, /**< High priority dispatch */
0211     /*@}*/
0212 
0213     /** \name Flags for DMA buffer request */
0214     /*@{*/
0215     DRM_DMA_WAIT         = 0x10, /**< Wait for free buffers */
0216     DRM_DMA_SMALLER_OK   = 0x20, /**< Smaller-than-requested buffers OK */
0217     DRM_DMA_LARGER_OK    = 0x40  /**< Larger-than-requested buffers OK */
0218     /*@}*/
0219 } drmDMAFlags;
0220 
0221 typedef enum {
0222     DRM_PAGE_ALIGN       = 0x01,
0223     DRM_AGP_BUFFER       = 0x02,
0224     DRM_SG_BUFFER        = 0x04,
0225     DRM_FB_BUFFER        = 0x08,
0226     DRM_PCI_BUFFER_RO    = 0x10
0227 } drmBufDescFlags;
0228 
0229 typedef enum {
0230     DRM_LOCK_READY      = 0x01, /**< Wait until hardware is ready for DMA */
0231     DRM_LOCK_QUIESCENT  = 0x02, /**< Wait until hardware quiescent */
0232     DRM_LOCK_FLUSH      = 0x04, /**< Flush this context's DMA queue first */
0233     DRM_LOCK_FLUSH_ALL  = 0x08, /**< Flush all DMA queues first */
0234                 /* These *HALT* flags aren't supported yet
0235                                    -- they will be used to support the
0236                                    full-screen DGA-like mode. */
0237     DRM_HALT_ALL_QUEUES = 0x10, /**< Halt all current and future queues */
0238     DRM_HALT_CUR_QUEUES = 0x20  /**< Halt all current queues */
0239 } drmLockFlags;
0240 
0241 typedef enum {
0242     DRM_CONTEXT_PRESERVED = 0x01, /**< This context is preserved and
0243                      never swapped. */
0244     DRM_CONTEXT_2DONLY    = 0x02  /**< This context is for 2D rendering only. */
0245 } drm_context_tFlags, *drm_context_tFlagsPtr;
0246 
0247 typedef struct _drmBufDesc {
0248     int              count;   /**< Number of buffers of this size */
0249     int              size;    /**< Size in bytes */
0250     int              low_mark;    /**< Low water mark */
0251     int              high_mark;   /**< High water mark */
0252 } drmBufDesc, *drmBufDescPtr;
0253 
0254 typedef struct _drmBufInfo {
0255     int              count;   /**< Number of buffers described in list */
0256     drmBufDescPtr    list;    /**< List of buffer descriptions */
0257 } drmBufInfo, *drmBufInfoPtr;
0258 
0259 typedef struct _drmBuf {
0260     int              idx;     /**< Index into the master buffer list */
0261     int              total;   /**< Buffer size */
0262     int              used;    /**< Amount of buffer in use (for DMA) */
0263     drmAddress       address;     /**< Address */
0264 } drmBuf, *drmBufPtr;
0265 
0266 /**
0267  * Buffer mapping information.
0268  *
0269  * Used by drmMapBufs() and drmUnmapBufs() to store information about the
0270  * mapped buffers.
0271  */
0272 typedef struct _drmBufMap {
0273     int              count;   /**< Number of buffers mapped */
0274     drmBufPtr        list;    /**< Buffers */
0275 } drmBufMap, *drmBufMapPtr;
0276 
0277 typedef struct _drmLock {
0278     volatile unsigned int lock;
0279     char                      padding[60];
0280     /* This is big enough for most current (and future?) architectures:
0281        DEC Alpha:              32 bytes
0282        Intel Merced:           ?
0283        Intel P5/PPro/PII/PIII: 32 bytes
0284        Intel StrongARM:        32 bytes
0285        Intel i386/i486:        16 bytes
0286        MIPS:                   32 bytes (?)
0287        Motorola 68k:           16 bytes
0288        Motorola PowerPC:       32 bytes
0289        Sun SPARC:              32 bytes
0290     */
0291 } drmLock, *drmLockPtr;
0292 
0293 /**
0294  * Indices here refer to the offset into
0295  * list in drmBufInfo
0296  */
0297 typedef struct _drmDMAReq {
0298     drm_context_t    context;     /**< Context handle */
0299     int           send_count;     /**< Number of buffers to send */
0300     int           *send_list;     /**< List of handles to buffers */
0301     int           *send_sizes;    /**< Lengths of data to send, in bytes */
0302     drmDMAFlags   flags;          /**< Flags */
0303     int           request_count;  /**< Number of buffers requested */
0304     int           request_size;   /**< Desired size of buffers requested */
0305     int           *request_list;  /**< Buffer information */
0306     int           *request_sizes; /**< Minimum acceptable sizes */
0307     int           granted_count;  /**< Number of buffers granted at this size */
0308 } drmDMAReq, *drmDMAReqPtr;
0309 
0310 typedef struct _drmRegion {
0311     drm_handle_t     handle;
0312     unsigned int  offset;
0313     drmSize       size;
0314     drmAddress    map;
0315 } drmRegion, *drmRegionPtr;
0316 
0317 typedef struct _drmTextureRegion {
0318     unsigned char next;
0319     unsigned char prev;
0320     unsigned char in_use;
0321     unsigned char padding;  /**< Explicitly pad this out */
0322     unsigned int  age;
0323 } drmTextureRegion, *drmTextureRegionPtr;
0324 
0325 
0326 typedef enum {
0327     DRM_VBLANK_ABSOLUTE = 0x0,  /**< Wait for specific vblank sequence number */
0328     DRM_VBLANK_RELATIVE = 0x1,  /**< Wait for given number of vblanks */
0329     /* bits 1-6 are reserved for high crtcs */
0330     DRM_VBLANK_HIGH_CRTC_MASK = 0x0000003e,
0331     DRM_VBLANK_EVENT = 0x4000000,   /**< Send event instead of blocking */
0332     DRM_VBLANK_FLIP = 0x8000000,    /**< Scheduled buffer swap should flip */
0333     DRM_VBLANK_NEXTONMISS = 0x10000000, /**< If missed, wait for next vblank */
0334     DRM_VBLANK_SECONDARY = 0x20000000,  /**< Secondary display controller */
0335     DRM_VBLANK_SIGNAL   = 0x40000000    /* Send signal instead of blocking */
0336 } drmVBlankSeqType;
0337 #define DRM_VBLANK_HIGH_CRTC_SHIFT 1
0338 
0339 typedef struct _drmVBlankReq {
0340     drmVBlankSeqType type;
0341     unsigned int sequence;
0342     unsigned long signal;
0343 } drmVBlankReq, *drmVBlankReqPtr;
0344 
0345 typedef struct _drmVBlankReply {
0346     drmVBlankSeqType type;
0347     unsigned int sequence;
0348     long tval_sec;
0349     long tval_usec;
0350 } drmVBlankReply, *drmVBlankReplyPtr;
0351 
0352 typedef union _drmVBlank {
0353     drmVBlankReq request;
0354     drmVBlankReply reply;
0355 } drmVBlank, *drmVBlankPtr;
0356 
0357 typedef struct _drmSetVersion {
0358     int drm_di_major;
0359     int drm_di_minor;
0360     int drm_dd_major;
0361     int drm_dd_minor;
0362 } drmSetVersion, *drmSetVersionPtr;
0363 
0364 #define __drm_dummy_lock(lock) (*(__volatile__ unsigned int *)lock)
0365 
0366 #define DRM_LOCK_HELD  0x80000000U /**< Hardware lock is held */
0367 #define DRM_LOCK_CONT  0x40000000U /**< Hardware lock is contended */
0368 
0369 #if defined(__GNUC__) && (__GNUC__ >= 2)
0370 # if defined(__i386) || defined(__AMD64__) || defined(__x86_64__) || defined(__amd64__)
0371                 /* Reflect changes here to drmP.h */
0372 #define DRM_CAS(lock,old,new,__ret)                                    \
0373     do {                                                           \
0374                 int __dummy;    /* Can't mark eax as clobbered */      \
0375         __asm__ __volatile__(                                  \
0376             "lock ; cmpxchg %4,%1\n\t"                     \
0377                         "setnz %0"                                     \
0378             : "=d" (__ret),                                \
0379               "=m" (__drm_dummy_lock(lock)),               \
0380                           "=a" (__dummy)                               \
0381             : "2" (old),                                   \
0382               "r" (new));                                  \
0383     } while (0)
0384 
0385 #elif defined(__alpha__)
0386 
0387 #define DRM_CAS(lock, old, new, ret)        \
0388     do {                    \
0389         int tmp, old32;         \
0390         __asm__ __volatile__(       \
0391         "   addl    $31, %5, %3\n"  \
0392         "1: ldl_l   %0, %2\n"   \
0393         "   cmpeq   %0, %3, %1\n"   \
0394         "   beq %1, 2f\n"   \
0395         "   mov %4, %0\n"   \
0396         "   stl_c   %0, %2\n"   \
0397         "   beq %0, 3f\n"   \
0398         "   mb\n"           \
0399         "2: cmpeq   %1, 0, %1\n"    \
0400         ".subsection 2\n"       \
0401         "3: br  1b\n"       \
0402         ".previous"         \
0403         : "=&r"(tmp), "=&r"(ret),   \
0404           "=m"(__drm_dummy_lock(lock)), \
0405           "=&r"(old32)          \
0406         : "r"(new), "r"(old)        \
0407         : "memory");            \
0408     } while (0)
0409 
0410 #elif defined(__sparc__)
0411 
0412 #define DRM_CAS(lock,old,new,__ret)             \
0413 do {    register unsigned int __old __asm("o0");        \
0414     register unsigned int __new __asm("o1");        \
0415     register volatile unsigned int *__lock __asm("o2"); \
0416     __old = old;                        \
0417     __new = new;                        \
0418     __lock = (volatile unsigned int *)lock;         \
0419     __asm__ __volatile__(                   \
0420         /*"cas [%2], %3, %0"*/              \
0421         ".word 0xd3e29008\n\t"              \
0422         /*"membar #StoreStore | #StoreLoad"*/       \
0423         ".word 0x8143e00a"              \
0424         : "=&r" (__new)                 \
0425         : "0" (__new),                  \
0426           "r" (__lock),                 \
0427           "r" (__old)                   \
0428         : "memory");                    \
0429     __ret = (__new != __old);               \
0430 } while(0)
0431 
0432 #elif defined(__ia64__)
0433 
0434 #ifdef __INTEL_COMPILER
0435 /* this currently generates bad code (missing stop bits)... */
0436 #include <ia64intrin.h>
0437 
0438 #define DRM_CAS(lock,old,new,__ret)                       \
0439     do {                                      \
0440         unsigned long __result, __old = (old) & 0xffffffff;     \
0441         __mf();                                 \
0442         __result = _InterlockedCompareExchange_acq(&__drm_dummy_lock(lock), (new), __old);\
0443         __ret = (__result) != (__old);                  \
0444 /*      __ret = (__sync_val_compare_and_swap(&__drm_dummy_lock(lock), \
0445                              (old), (new))        \
0446              != (old));                       */\
0447     } while (0)
0448 
0449 #else
0450 #define DRM_CAS(lock,old,new,__ret)                   \
0451     do {                                  \
0452         unsigned int __result, __old = (old);             \
0453         __asm__ __volatile__(                     \
0454             "mf\n"                        \
0455             "mov ar.ccv=%2\n"                 \
0456             ";;\n"                        \
0457             "cmpxchg4.acq %0=%1,%3,ar.ccv"            \
0458             : "=r" (__result), "=m" (__drm_dummy_lock(lock))  \
0459             : "r" ((unsigned long)__old), "r" (new)           \
0460             : "memory");                      \
0461         __ret = (__result) != (__old);                \
0462     } while (0)
0463 
0464 #endif
0465 
0466 #elif defined(__powerpc__)
0467 
0468 #define DRM_CAS(lock,old,new,__ret)         \
0469     do {                        \
0470         __asm__ __volatile__(           \
0471             "sync;"             \
0472             "0:    lwarx %0,0,%1;"      \
0473             "      xor. %0,%3,%0;"      \
0474             "      bne 1f;"         \
0475             "      stwcx. %2,0,%1;"     \
0476             "      bne- 0b;"        \
0477             "1:    "            \
0478             "sync;"             \
0479         : "=&r"(__ret)              \
0480         : "r"(lock), "r"(new), "r"(old)     \
0481         : "cr0", "memory");         \
0482     } while (0)
0483 
0484 # elif defined (__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \
0485     || defined (__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) \
0486     || defined (__ARM_ARCH_6K__) || defined(__ARM_ARCH_6T2__) \
0487     || defined (__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \
0488     || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \
0489     || defined(__ARM_ARCH_7EM__)
0490        /* excluding ARMv4/ARMv5 and lower (lacking ldrex/strex support) */
0491        #undef DRM_DEV_MODE
0492        #define DRM_DEV_MODE     (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)
0493 
0494        #define DRM_CAS(lock,old,new,__ret)             \
0495        do {                                            \
0496                __asm__ __volatile__ (                  \
0497                        "1: ldrex %0, [%1]\n"           \
0498                        "   teq %0, %2\n"               \
0499                        "   ite eq\n"                   \
0500                        "   strexeq %0, %3, [%1]\n"     \
0501                        "   movne   %0, #1\n"           \
0502                : "=&r" (__ret)                         \
0503                : "r" (lock), "r" (old), "r" (new)      \
0504                : "cc","memory");                       \
0505        } while (0)
0506 
0507 #endif /* architecture */
0508 #endif /* __GNUC__ >= 2 */
0509 
0510 #ifndef DRM_CAS
0511 #define DRM_CAS(lock,old,new,ret) do { ret=1; } while (0) /* FAST LOCK FAILS */
0512 #endif
0513 
0514 #if defined(__alpha__)
0515 #define DRM_CAS_RESULT(_result)     long _result
0516 #elif defined(__powerpc__)
0517 #define DRM_CAS_RESULT(_result)     int _result
0518 #else
0519 #define DRM_CAS_RESULT(_result)     char _result
0520 #endif
0521 
0522 #define DRM_LIGHT_LOCK(fd,lock,context)                                \
0523     do {                                                           \
0524                 DRM_CAS_RESULT(__ret);                                 \
0525         DRM_CAS(lock,context,DRM_LOCK_HELD|context,__ret);     \
0526                 if (__ret) drmGetLock(fd,context,0);                   \
0527         } while(0)
0528 
0529                 /* This one counts fast locks -- for
0530                                    benchmarking only. */
0531 #define DRM_LIGHT_LOCK_COUNT(fd,lock,context,count)                    \
0532     do {                                                           \
0533                 DRM_CAS_RESULT(__ret);                                 \
0534         DRM_CAS(lock,context,DRM_LOCK_HELD|context,__ret);     \
0535                 if (__ret) drmGetLock(fd,context,0);                   \
0536                 else       ++count;                                    \
0537         } while(0)
0538 
0539 #define DRM_LOCK(fd,lock,context,flags)                                \
0540     do {                                                           \
0541         if (flags) drmGetLock(fd,context,flags);               \
0542         else       DRM_LIGHT_LOCK(fd,lock,context);            \
0543     } while(0)
0544 
0545 #define DRM_UNLOCK(fd,lock,context)                                    \
0546     do {                                                           \
0547                 DRM_CAS_RESULT(__ret);                                 \
0548         DRM_CAS(lock,DRM_LOCK_HELD|context,context,__ret);     \
0549                 if (__ret) drmUnlock(fd,context);                      \
0550         } while(0)
0551 
0552                 /* Simple spin locks */
0553 #define DRM_SPINLOCK(spin,val)                                         \
0554     do {                                                           \
0555             DRM_CAS_RESULT(__ret);                                     \
0556         do {                                                       \
0557         DRM_CAS(spin,0,val,__ret);                             \
0558         if (__ret) while ((spin)->lock);                       \
0559         } while (__ret);                                           \
0560     } while(0)
0561 
0562 #define DRM_SPINLOCK_TAKE(spin,val)                                    \
0563     do {                                                           \
0564             DRM_CAS_RESULT(__ret);                                     \
0565             int  cur;                                                  \
0566         do {                                                       \
0567                 cur = (*spin).lock;                                    \
0568         DRM_CAS(spin,cur,val,__ret);                           \
0569         } while (__ret);                                           \
0570     } while(0)
0571 
0572 #define DRM_SPINLOCK_COUNT(spin,val,count,__ret)                       \
0573     do {                                                           \
0574             int  __i;                                                  \
0575             __ret = 1;                                                 \
0576             for (__i = 0; __ret && __i < count; __i++) {               \
0577         DRM_CAS(spin,0,val,__ret);                             \
0578         if (__ret) for (;__i < count && (spin)->lock; __i++);  \
0579         }                                                          \
0580     } while(0)
0581 
0582 #define DRM_SPINUNLOCK(spin,val)                                       \
0583     do {                                                           \
0584             DRM_CAS_RESULT(__ret);                                     \
0585             if ((*spin).lock == val) { /* else server stole lock */    \
0586             do {                                                   \
0587             DRM_CAS(spin,val,0,__ret);                         \
0588             } while (__ret);                                       \
0589             }                                                          \
0590     } while(0)
0591 
0592 
0593 
0594 /* General user-level programmer's API: unprivileged */
0595 extern int           drmAvailable(void);
0596 extern int           drmOpen(const char *name, const char *busid);
0597 
0598 #define DRM_NODE_PRIMARY 0
0599 #define DRM_NODE_CONTROL 1 /* deprecated: never returned */
0600 #define DRM_NODE_RENDER  2
0601 #define DRM_NODE_MAX     3
0602 
0603 extern int           drmOpenWithType(const char *name, const char *busid,
0604                                      int type);
0605 
0606 extern int           drmOpenControl(int minor); /* deprecated: always fails */
0607 extern int           drmOpenRender(int minor);
0608 extern int           drmClose(int fd);
0609 extern drmVersionPtr drmGetVersion(int fd);
0610 extern drmVersionPtr drmGetLibVersion(int fd);
0611 extern int           drmGetCap(int fd, uint64_t capability, uint64_t *value);
0612 extern void          drmFreeVersion(drmVersionPtr);
0613 extern int           drmGetMagic(int fd, drm_magic_t * magic);
0614 extern char          *drmGetBusid(int fd);
0615 extern int           drmGetInterruptFromBusID(int fd, int busnum, int devnum,
0616                           int funcnum);
0617 extern int           drmGetMap(int fd, int idx, drm_handle_t *offset,
0618                    drmSize *size, drmMapType *type,
0619                    drmMapFlags *flags, drm_handle_t *handle,
0620                    int *mtrr);
0621 extern int           drmGetClient(int fd, int idx, int *auth, int *pid,
0622                   int *uid, unsigned long *magic,
0623                   unsigned long *iocs);
0624 extern int           drmGetStats(int fd, drmStatsT *stats);
0625 extern int           drmSetInterfaceVersion(int fd, drmSetVersion *version);
0626 extern int           drmCommandNone(int fd, unsigned long drmCommandIndex);
0627 extern int           drmCommandRead(int fd, unsigned long drmCommandIndex,
0628                                     void *data, unsigned long size);
0629 extern int           drmCommandWrite(int fd, unsigned long drmCommandIndex,
0630                                      void *data, unsigned long size);
0631 extern int           drmCommandWriteRead(int fd, unsigned long drmCommandIndex,
0632                                          void *data, unsigned long size);
0633 
0634 /* General user-level programmer's API: X server (root) only  */
0635 extern void          drmFreeBusid(const char *busid);
0636 extern int           drmSetBusid(int fd, const char *busid);
0637 extern int           drmAuthMagic(int fd, drm_magic_t magic);
0638 extern int           drmAddMap(int fd,
0639                    drm_handle_t offset,
0640                    drmSize size,
0641                    drmMapType type,
0642                    drmMapFlags flags,
0643                    drm_handle_t * handle);
0644 extern int       drmRmMap(int fd, drm_handle_t handle);
0645 extern int       drmAddContextPrivateMapping(int fd, drm_context_t ctx_id,
0646                          drm_handle_t handle);
0647 
0648 extern int           drmAddBufs(int fd, int count, int size,
0649                 drmBufDescFlags flags,
0650                 int agp_offset);
0651 extern int           drmMarkBufs(int fd, double low, double high);
0652 extern int           drmCreateContext(int fd, drm_context_t * handle);
0653 extern int           drmSetContextFlags(int fd, drm_context_t context,
0654                     drm_context_tFlags flags);
0655 extern int           drmGetContextFlags(int fd, drm_context_t context,
0656                     drm_context_tFlagsPtr flags);
0657 extern int           drmAddContextTag(int fd, drm_context_t context, void *tag);
0658 extern int           drmDelContextTag(int fd, drm_context_t context);
0659 extern void          *drmGetContextTag(int fd, drm_context_t context);
0660 extern drm_context_t * drmGetReservedContextList(int fd, int *count);
0661 extern void          drmFreeReservedContextList(drm_context_t *);
0662 extern int           drmSwitchToContext(int fd, drm_context_t context);
0663 extern int           drmDestroyContext(int fd, drm_context_t handle);
0664 extern int           drmCreateDrawable(int fd, drm_drawable_t * handle);
0665 extern int           drmDestroyDrawable(int fd, drm_drawable_t handle);
0666 extern int           drmUpdateDrawableInfo(int fd, drm_drawable_t handle,
0667                        drm_drawable_info_type_t type,
0668                        unsigned int num, void *data);
0669 extern int           drmCtlInstHandler(int fd, int irq);
0670 extern int           drmCtlUninstHandler(int fd);
0671 extern int           drmSetClientCap(int fd, uint64_t capability,
0672                      uint64_t value);
0673 
0674 extern int           drmCrtcGetSequence(int fd, uint32_t crtcId,
0675                     uint64_t *sequence, uint64_t *ns);
0676 extern int           drmCrtcQueueSequence(int fd, uint32_t crtcId,
0677                       uint32_t flags, uint64_t sequence,
0678                       uint64_t *sequence_queued,
0679                       uint64_t user_data);
0680 /* General user-level programmer's API: authenticated client and/or X */
0681 extern int           drmMap(int fd,
0682                 drm_handle_t handle,
0683                 drmSize size,
0684                 drmAddressPtr address);
0685 extern int           drmUnmap(drmAddress address, drmSize size);
0686 extern drmBufInfoPtr drmGetBufInfo(int fd);
0687 extern drmBufMapPtr  drmMapBufs(int fd);
0688 extern int           drmUnmapBufs(drmBufMapPtr bufs);
0689 extern int           drmDMA(int fd, drmDMAReqPtr request);
0690 extern int           drmFreeBufs(int fd, int count, int *list);
0691 extern int           drmGetLock(int fd,
0692                     drm_context_t context,
0693                     drmLockFlags flags);
0694 extern int           drmUnlock(int fd, drm_context_t context);
0695 extern int           drmFinish(int fd, int context, drmLockFlags flags);
0696 extern int       drmGetContextPrivateMapping(int fd, drm_context_t ctx_id, 
0697                          drm_handle_t * handle);
0698 
0699 /* AGP/GART support: X server (root) only */
0700 extern int           drmAgpAcquire(int fd);
0701 extern int           drmAgpRelease(int fd);
0702 extern int           drmAgpEnable(int fd, unsigned long mode);
0703 extern int           drmAgpAlloc(int fd, unsigned long size,
0704                  unsigned long type, unsigned long *address,
0705                  drm_handle_t *handle);
0706 extern int           drmAgpFree(int fd, drm_handle_t handle);
0707 extern int       drmAgpBind(int fd, drm_handle_t handle,
0708                 unsigned long offset);
0709 extern int           drmAgpUnbind(int fd, drm_handle_t handle);
0710 
0711 /* AGP/GART info: authenticated client and/or X */
0712 extern int           drmAgpVersionMajor(int fd);
0713 extern int           drmAgpVersionMinor(int fd);
0714 extern unsigned long drmAgpGetMode(int fd);
0715 extern unsigned long drmAgpBase(int fd); /* Physical location */
0716 extern unsigned long drmAgpSize(int fd); /* Bytes */
0717 extern unsigned long drmAgpMemoryUsed(int fd);
0718 extern unsigned long drmAgpMemoryAvail(int fd);
0719 extern unsigned int  drmAgpVendorId(int fd);
0720 extern unsigned int  drmAgpDeviceId(int fd);
0721 
0722 /* PCI scatter/gather support: X server (root) only */
0723 extern int           drmScatterGatherAlloc(int fd, unsigned long size,
0724                        drm_handle_t *handle);
0725 extern int           drmScatterGatherFree(int fd, drm_handle_t handle);
0726 
0727 extern int           drmWaitVBlank(int fd, drmVBlankPtr vbl);
0728 
0729 /* Support routines */
0730 extern void          drmSetServerInfo(drmServerInfoPtr info);
0731 extern int           drmError(int err, const char *label);
0732 extern void          *drmMalloc(int size);
0733 extern void          drmFree(void *pt);
0734 
0735 /* Hash table routines */
0736 extern void *drmHashCreate(void);
0737 extern int  drmHashDestroy(void *t);
0738 extern int  drmHashLookup(void *t, unsigned long key, void **value);
0739 extern int  drmHashInsert(void *t, unsigned long key, void *value);
0740 extern int  drmHashDelete(void *t, unsigned long key);
0741 extern int  drmHashFirst(void *t, unsigned long *key, void **value);
0742 extern int  drmHashNext(void *t, unsigned long *key, void **value);
0743 
0744 /* PRNG routines */
0745 extern void          *drmRandomCreate(unsigned long seed);
0746 extern int           drmRandomDestroy(void *state);
0747 extern unsigned long drmRandom(void *state);
0748 extern double        drmRandomDouble(void *state);
0749 
0750 /* Skip list routines */
0751 
0752 extern void *drmSLCreate(void);
0753 extern int  drmSLDestroy(void *l);
0754 extern int  drmSLLookup(void *l, unsigned long key, void **value);
0755 extern int  drmSLInsert(void *l, unsigned long key, void *value);
0756 extern int  drmSLDelete(void *l, unsigned long key);
0757 extern int  drmSLNext(void *l, unsigned long *key, void **value);
0758 extern int  drmSLFirst(void *l, unsigned long *key, void **value);
0759 extern void drmSLDump(void *l);
0760 extern int  drmSLLookupNeighbors(void *l, unsigned long key,
0761                  unsigned long *prev_key, void **prev_value,
0762                  unsigned long *next_key, void **next_value);
0763 
0764 extern int drmOpenOnce(void *unused, const char *BusID, int *newlyopened);
0765 extern int drmOpenOnceWithType(const char *BusID, int *newlyopened, int type);
0766 extern void drmCloseOnce(int fd);
0767 extern void drmMsg(const char *format, ...) DRM_PRINTFLIKE(1, 2);
0768 
0769 extern int drmSetMaster(int fd);
0770 extern int drmDropMaster(int fd);
0771 extern int drmIsMaster(int fd);
0772 
0773 #define DRM_EVENT_CONTEXT_VERSION 4
0774 
0775 typedef struct _drmEventContext {
0776 
0777     /* This struct is versioned so we can add more pointers if we
0778      * add more events. */
0779     int version;
0780 
0781     void (*vblank_handler)(int fd,
0782                    unsigned int sequence, 
0783                    unsigned int tv_sec,
0784                    unsigned int tv_usec,
0785                    void *user_data);
0786 
0787     void (*page_flip_handler)(int fd,
0788                   unsigned int sequence,
0789                   unsigned int tv_sec,
0790                   unsigned int tv_usec,
0791                   void *user_data);
0792 
0793     void (*page_flip_handler2)(int fd,
0794                    unsigned int sequence,
0795                    unsigned int tv_sec,
0796                    unsigned int tv_usec,
0797                    unsigned int crtc_id,
0798                    void *user_data);
0799 
0800     void (*sequence_handler)(int fd,
0801                  uint64_t sequence,
0802                  uint64_t ns,
0803                  uint64_t user_data);
0804 } drmEventContext, *drmEventContextPtr;
0805 
0806 extern int drmHandleEvent(int fd, drmEventContextPtr evctx);
0807 
0808 extern char *drmGetDeviceNameFromFd(int fd);
0809 
0810 /* Improved version of drmGetDeviceNameFromFd which attributes for any type of
0811  * device/node - card or renderD.
0812  */
0813 extern char *drmGetDeviceNameFromFd2(int fd);
0814 extern int drmGetNodeTypeFromFd(int fd);
0815 
0816 /* Convert between GEM handles and DMA-BUF file descriptors.
0817  *
0818  * Warning: since GEM handles are not reference-counted and are unique per
0819  * DRM file description, the caller is expected to perform its own reference
0820  * counting. drmPrimeFDToHandle is guaranteed to return the same handle for
0821  * different FDs if they reference the same underlying buffer object. This
0822  * could even be a buffer object originally created on the same DRM FD.
0823  *
0824  * When sharing a DRM FD with an API such as EGL or GBM, the caller must not
0825  * use drmPrimeHandleToFD nor drmPrimeFDToHandle. A single user-space
0826  * reference-counting implementation is necessary to avoid double-closing GEM
0827  * handles.
0828  *
0829  * Two processes can't share the same DRM FD and both use it to create or
0830  * import GEM handles, even when using a single user-space reference-counting
0831  * implementation like GBM, because GBM doesn't share its state between
0832  * processes.
0833  */
0834 extern int drmPrimeHandleToFD(int fd, uint32_t handle, uint32_t flags, int *prime_fd);
0835 extern int drmPrimeFDToHandle(int fd, int prime_fd, uint32_t *handle);
0836 
0837 extern int drmCloseBufferHandle(int fd, uint32_t handle);
0838 
0839 extern char *drmGetPrimaryDeviceNameFromFd(int fd);
0840 extern char *drmGetRenderDeviceNameFromFd(int fd);
0841 
0842 #define DRM_BUS_PCI       0
0843 #define DRM_BUS_USB       1
0844 #define DRM_BUS_PLATFORM  2
0845 #define DRM_BUS_HOST1X    3
0846 
0847 typedef struct _drmPciBusInfo {
0848     uint16_t domain;
0849     uint8_t bus;
0850     uint8_t dev;
0851     uint8_t func;
0852 } drmPciBusInfo, *drmPciBusInfoPtr;
0853 
0854 typedef struct _drmPciDeviceInfo {
0855     uint16_t vendor_id;
0856     uint16_t device_id;
0857     uint16_t subvendor_id;
0858     uint16_t subdevice_id;
0859     uint8_t revision_id;
0860 } drmPciDeviceInfo, *drmPciDeviceInfoPtr;
0861 
0862 typedef struct _drmUsbBusInfo {
0863     uint8_t bus;
0864     uint8_t dev;
0865 } drmUsbBusInfo, *drmUsbBusInfoPtr;
0866 
0867 typedef struct _drmUsbDeviceInfo {
0868     uint16_t vendor;
0869     uint16_t product;
0870 } drmUsbDeviceInfo, *drmUsbDeviceInfoPtr;
0871 
0872 #define DRM_PLATFORM_DEVICE_NAME_LEN 512
0873 
0874 typedef struct _drmPlatformBusInfo {
0875     char fullname[DRM_PLATFORM_DEVICE_NAME_LEN];
0876 } drmPlatformBusInfo, *drmPlatformBusInfoPtr;
0877 
0878 typedef struct _drmPlatformDeviceInfo {
0879     char **compatible; /* NULL terminated list of compatible strings */
0880 } drmPlatformDeviceInfo, *drmPlatformDeviceInfoPtr;
0881 
0882 #define DRM_HOST1X_DEVICE_NAME_LEN 512
0883 
0884 typedef struct _drmHost1xBusInfo {
0885     char fullname[DRM_HOST1X_DEVICE_NAME_LEN];
0886 } drmHost1xBusInfo, *drmHost1xBusInfoPtr;
0887 
0888 typedef struct _drmHost1xDeviceInfo {
0889     char **compatible; /* NULL terminated list of compatible strings */
0890 } drmHost1xDeviceInfo, *drmHost1xDeviceInfoPtr;
0891 
0892 typedef struct _drmDevice {
0893     char **nodes; /* DRM_NODE_MAX sized array */
0894     int available_nodes; /* DRM_NODE_* bitmask */
0895     int bustype;
0896     union {
0897         drmPciBusInfoPtr pci;
0898         drmUsbBusInfoPtr usb;
0899         drmPlatformBusInfoPtr platform;
0900         drmHost1xBusInfoPtr host1x;
0901     } businfo;
0902     union {
0903         drmPciDeviceInfoPtr pci;
0904         drmUsbDeviceInfoPtr usb;
0905         drmPlatformDeviceInfoPtr platform;
0906         drmHost1xDeviceInfoPtr host1x;
0907     } deviceinfo;
0908 } drmDevice, *drmDevicePtr;
0909 
0910 extern int drmGetDevice(int fd, drmDevicePtr *device);
0911 extern void drmFreeDevice(drmDevicePtr *device);
0912 
0913 extern int drmGetDevices(drmDevicePtr devices[], int max_devices);
0914 extern void drmFreeDevices(drmDevicePtr devices[], int count);
0915 
0916 #define DRM_DEVICE_GET_PCI_REVISION (1 << 0)
0917 extern int drmGetDevice2(int fd, uint32_t flags, drmDevicePtr *device);
0918 extern int drmGetDevices2(uint32_t flags, drmDevicePtr devices[], int max_devices);
0919 
0920 extern int drmGetDeviceFromDevId(dev_t dev_id, uint32_t flags, drmDevicePtr *device);
0921 
0922 /**
0923  * Get the node type (DRM_NODE_PRIMARY or DRM_NODE_RENDER) from a device ID.
0924  *
0925  * Returns negative errno on error.
0926  */
0927 extern int drmGetNodeTypeFromDevId(dev_t devid);
0928 
0929 /**
0930  * Check if two drmDevice pointers represent the same DRM device.
0931  *
0932  * Returns 1 if the devices are equal, 0 otherwise.
0933  */
0934 extern int drmDevicesEqual(drmDevicePtr a, drmDevicePtr b);
0935 
0936 extern int drmSyncobjCreate(int fd, uint32_t flags, uint32_t *handle);
0937 extern int drmSyncobjDestroy(int fd, uint32_t handle);
0938 extern int drmSyncobjHandleToFD(int fd, uint32_t handle, int *obj_fd);
0939 extern int drmSyncobjFDToHandle(int fd, int obj_fd, uint32_t *handle);
0940 
0941 extern int drmSyncobjImportSyncFile(int fd, uint32_t handle, int sync_file_fd);
0942 extern int drmSyncobjExportSyncFile(int fd, uint32_t handle, int *sync_file_fd);
0943 extern int drmSyncobjWait(int fd, uint32_t *handles, unsigned num_handles,
0944               int64_t timeout_nsec, unsigned flags,
0945               uint32_t *first_signaled);
0946 extern int drmSyncobjReset(int fd, const uint32_t *handles, uint32_t handle_count);
0947 extern int drmSyncobjSignal(int fd, const uint32_t *handles, uint32_t handle_count);
0948 extern int drmSyncobjTimelineSignal(int fd, const uint32_t *handles,
0949                     uint64_t *points, uint32_t handle_count);
0950 extern int drmSyncobjTimelineWait(int fd, uint32_t *handles, uint64_t *points,
0951                   unsigned num_handles,
0952                   int64_t timeout_nsec, unsigned flags,
0953                   uint32_t *first_signaled);
0954 extern int drmSyncobjQuery(int fd, uint32_t *handles, uint64_t *points,
0955                uint32_t handle_count);
0956 extern int drmSyncobjQuery2(int fd, uint32_t *handles, uint64_t *points,
0957                 uint32_t handle_count, uint32_t flags);
0958 extern int drmSyncobjTransfer(int fd,
0959                   uint32_t dst_handle, uint64_t dst_point,
0960                   uint32_t src_handle, uint64_t src_point,
0961                   uint32_t flags);
0962 extern int drmSyncobjEventfd(int fd, uint32_t handle, uint64_t point, int ev_fd,
0963                              uint32_t flags);
0964 
0965 extern char *
0966 drmGetFormatModifierVendor(uint64_t modifier);
0967 
0968 extern char *
0969 drmGetFormatModifierName(uint64_t modifier);
0970 
0971 extern char *
0972 drmGetFormatName(uint32_t format);
0973 
0974 #ifndef fourcc_mod_get_vendor
0975 #define fourcc_mod_get_vendor(modifier) \
0976        (((modifier) >> 56) & 0xff)
0977 #endif
0978 
0979 #if defined(__cplusplus)
0980 }
0981 #endif
0982 
0983 #endif
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