mirror of
https://git.FreeBSD.org/src.git
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4775259180
on -current. Actually copy in data from userspace to kernel in the linux-compat ioctl path. Make sure ioctl sizes are as expected in the handler functions. Reviewed by: rwatson
317 lines
8.4 KiB
C
317 lines
8.4 KiB
C
/*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/queue.h>
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#include <sys/lockmgr.h>
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#include <sys/malloc.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/stat.h>
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#include <sys/proc.h>
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#include <sys/lock.h>
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#include <sys/fcntl.h>
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#include <sys/uio.h>
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#include <sys/filio.h>
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#include <sys/sysctl.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <machine/pmap.h>
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#if __FreeBSD_version >= 500000
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#include <sys/selinfo.h>
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#endif
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#include <sys/bus.h>
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#if __FreeBSD_version >= 400005
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#include <sys/taskqueue.h>
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#endif
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#if __FreeBSD_version >= 500000
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#include <sys/mutex.h>
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#endif
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#if __FreeBSD_version >= 400006
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#define __REALLY_HAVE_AGP __HAVE_AGP
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#endif
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#define __REALLY_HAVE_MTRR 0
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#define __REALLY_HAVE_SG 0
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#if __REALLY_HAVE_AGP
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#include <pci/agpvar.h>
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#endif
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/* Allow setting of debug code enabling from kernel config file */
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#include <opt_drm.h>
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#if DRM_DEBUG
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#undef DRM_DEBUG_CODE
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#define DRM_DEBUG_CODE 2
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#endif
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#undef DRM_DEBUG
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#define DRM_TIME_SLICE (hz/20) /* Time slice for GLXContexts */
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#define DRM_DEV_MODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP)
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#define DRM_DEV_UID 0
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#define DRM_DEV_GID 0
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#if __FreeBSD_version >= 500000
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#define DRM_OS_SPINTYPE struct mtx
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#define DRM_OS_SPININIT(l,name) mtx_init(&l, name, NULL, MTX_DEF)
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#define DRM_OS_SPINLOCK(l) mtx_lock(l)
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#define DRM_OS_SPINUNLOCK(u) mtx_unlock(u);
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#define DRM_OS_CURPROC curthread
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#define DRM_OS_STRUCTPROC struct thread
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#define DRM_OS_CURRENTPID curthread->td_proc->p_pid
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#else
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#define DRM_OS_CURPROC curproc
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#define DRM_OS_STRUCTPROC struct proc
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#define DRM_OS_SPINTYPE struct simplelock
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#define DRM_OS_SPININIT(l,name) simple_lock_init(&l)
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#define DRM_OS_SPINLOCK(l) simple_lock(l)
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#define DRM_OS_SPINUNLOCK(u) simple_unlock(u);
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#define DRM_OS_CURRENTPID curproc->p_pid
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#endif
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#define DRM_OS_IOCTL dev_t kdev, u_long cmd, caddr_t data, int flags, DRM_OS_STRUCTPROC *p
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#define IOCTL_ARGS_PASS kdev, cmd, data, flags, p
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#define DRM_OS_LOCK lockmgr(&dev->dev_lock, LK_EXCLUSIVE, 0, DRM_OS_CURPROC)
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#define DRM_OS_UNLOCK lockmgr(&dev->dev_lock, LK_RELEASE, 0, DRM_OS_CURPROC)
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#define DRM_OS_CHECKSUSER suser(p)
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#define DRM_OS_TASKQUEUE_ARGS void *dev, int pending
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#define DRM_OS_IRQ_ARGS void *device
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#define DRM_OS_DEVICE drm_device_t *dev = kdev->si_drv1
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#define DRM_OS_MALLOC(size) malloc( size, DRM(M_DRM), M_NOWAIT )
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#define DRM_OS_FREE(pt) free( pt, DRM(M_DRM) )
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#define DRM_OS_VTOPHYS(addr) vtophys(addr)
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#define DRM_OS_PRIV \
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drm_file_t *priv = (drm_file_t *) DRM(find_file_by_proc)(dev, p); \
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if (!priv) { \
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DRM_DEBUG("can't find authenticator\n"); \
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return EINVAL; \
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}
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#define DRM_OS_DELAY( udelay ) \
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do { \
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struct timeval tv1, tv2; \
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microtime(&tv1); \
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do { \
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microtime(&tv2); \
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} \
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while (((tv2.tv_sec-tv1.tv_sec)*1000000 + tv2.tv_usec - tv1.tv_usec) < udelay ); \
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} while (0)
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#define DRM_OS_ERR(v) v
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#define DRM_OS_KRNTOUSR( user, kern, size) \
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if ( IOCPARM_LEN(cmd) != size) \
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return EINVAL; \
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*user = kern;
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#define DRM_OS_KRNFROMUSR(kern, user, size) \
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if ( IOCPARM_LEN(cmd) != size) \
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return EINVAL; \
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kern = *user;
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#define DRM_OS_COPYTOUSR(user, kern, size) \
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copyout(kern, user, size)
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#define DRM_OS_COPYFROMUSR(kern, user, size) \
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copyin(user, kern, size)
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#define DRM_OS_READMEMORYBARRIER \
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{ \
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int xchangeDummy; \
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DRM_DEBUG("%s\n", __func__); \
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__asm__ volatile(" push %%eax ; xchg %%eax, %0 ; pop %%eax" : : "m" (xchangeDummy)); \
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__asm__ volatile(" push %%eax ; push %%ebx ; push %%ecx ; push %%edx ;" \
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" movl $0,%%eax ; cpuid ; pop %%edx ; pop %%ecx ; pop %%ebx ;" \
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" pop %%eax" : /* no outputs */ : /* no inputs */ ); \
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} while (0);
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#define DRM_OS_WRITEMEMORYBARRIER DRM_OS_READMEMORYBARRIER
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#define DRM_OS_WAKEUP(w) wakeup(w)
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#define DRM_OS_WAKEUP_INT(w) wakeup(w)
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#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
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#define malloctype DRM(M_DRM)
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/* The macros confliced in the MALLOC_DEFINE */
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MALLOC_DECLARE(malloctype);
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#undef malloctype
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typedef struct drm_chipinfo
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{
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int vendor;
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int device;
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int supported;
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char *name;
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} drm_chipinfo_t;
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typedef unsigned long atomic_t;
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typedef u_int32_t cycles_t;
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typedef u_int32_t spinlock_t;
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typedef u_int32_t u32;
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typedef u_int16_t u16;
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typedef u_int8_t u8;
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#define atomic_set(p, v) (*(p) = (v))
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#define atomic_read(p) (*(p))
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#define atomic_inc(p) atomic_add_long(p, 1)
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#define atomic_dec(p) atomic_subtract_long(p, 1)
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#define atomic_add(n, p) atomic_add_long(p, n)
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#define atomic_sub(n, p) atomic_subtract_long(p, n)
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/* Fake this */
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static __inline unsigned int
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test_and_set_bit(int b, volatile unsigned long *p)
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{
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int s = splhigh();
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unsigned int m = 1<<b;
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unsigned int r = *p & m;
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*p |= m;
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splx(s);
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return r;
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}
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static __inline void
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clear_bit(int b, volatile unsigned long *p)
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{
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atomic_clear_long(p + (b >> 5), 1 << (b & 0x1f));
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}
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static __inline void
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set_bit(int b, volatile unsigned long *p)
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{
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atomic_set_long(p + (b >> 5), 1 << (b & 0x1f));
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}
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static __inline int
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test_bit(int b, volatile unsigned long *p)
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{
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return p[b >> 5] & (1 << (b & 0x1f));
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}
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static __inline int
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find_first_zero_bit(volatile unsigned long *p, int max)
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{
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int b;
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for (b = 0; b < max; b += 32) {
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if (p[b >> 5] != ~0) {
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for (;;) {
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if ((p[b >> 5] & (1 << (b & 0x1f))) == 0)
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return b;
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b++;
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}
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}
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}
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return max;
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}
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#define spldrm() spltty()
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#define memset(p, v, s) bzero(p, s)
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/*
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* Fake out the module macros for versions of FreeBSD where they don't
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* exist.
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*/
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#if (__FreeBSD_version < 500002 && __FreeBSD_version > 500000) || __FreeBSD_version < 420000
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/* FIXME: again, what's the exact date? */
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#define MODULE_VERSION(a,b) struct __hack
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#define MODULE_DEPEND(a,b,c,d,e) struct __hack
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#endif
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#define __drm_dummy_lock(lock) (*(__volatile__ unsigned int *)lock)
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#define _DRM_CAS(lock,old,new,__ret) \
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do { \
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int __dummy; /* Can't mark eax as clobbered */ \
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__asm__ __volatile__( \
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"lock ; cmpxchg %4,%1\n\t" \
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"setnz %0" \
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: "=d" (__ret), \
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"=m" (__drm_dummy_lock(lock)), \
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"=a" (__dummy) \
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: "2" (old), \
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"r" (new)); \
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} while (0)
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/* Redefinitions to make templating easy */
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#define wait_queue_head_t long
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#define agp_memory void
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#define jiffies ticks
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/* Macros to make printf easier */
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#define DRM_ERROR(fmt, arg...) \
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printf("error: [" DRM_NAME ":%s] *ERROR* " fmt , \
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__func__, ##arg)
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#define DRM_MEM_ERROR(area, fmt, arg...) \
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printf("error: [" DRM_NAME ":%s:%s] *ERROR* " fmt , \
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__func__, DRM(mem_stats)[area].name , ##arg)
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#define DRM_INFO(fmt, arg...) printf("info: " "[" DRM_NAME "] " fmt , ##arg)
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#if DRM_DEBUG_CODE
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#define DRM_DEBUG(fmt, arg...) \
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do { \
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if (DRM(flags) & DRM_FLAG_DEBUG) \
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printf("[" DRM_NAME ":%s] " fmt , \
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__func__, ##arg); \
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} while (0)
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#else
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#define DRM_DEBUG(fmt, arg...) do { } while (0)
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#endif
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#define DRM_PROC_LIMIT (PAGE_SIZE-80)
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#if (__FreeBSD_version >= 500000) || ((__FreeBSD_version < 500000) && (__FreeBSD_version >= 410002))
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#define DRM_SYSCTL_HANDLER_ARGS (SYSCTL_HANDLER_ARGS)
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#else
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#define DRM_SYSCTL_HANDLER_ARGS SYSCTL_HANDLER_ARGS
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#endif
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#define DRM_SYSCTL_PRINT(fmt, arg...) \
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snprintf(buf, sizeof(buf), fmt, ##arg); \
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error = SYSCTL_OUT(req, buf, strlen(buf)); \
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if (error) return error;
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#define DRM_SYSCTL_PRINT_RET(ret, fmt, arg...) \
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snprintf(buf, sizeof(buf), fmt, ##arg); \
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error = SYSCTL_OUT(req, buf, strlen(buf)); \
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if (error) { ret; return error; }
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#define DRM_FIND_MAP(dest, o) \
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do { \
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drm_map_list_entry_t *listentry; \
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TAILQ_FOREACH(listentry, dev->maplist, link) { \
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if ( listentry->map->offset == o ) { \
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dest = listentry->map; \
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break; \
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} \
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} \
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} while (0)
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/* Internal functions */
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/* drm_drv.h */
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extern d_open_t DRM(open);
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extern d_close_t DRM(close);
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extern d_read_t DRM(read);
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extern d_write_t DRM(write);
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extern d_poll_t DRM(poll);
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extern d_mmap_t DRM(mmap);
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extern int DRM(open_helper)(dev_t kdev, int flags, int fmt,
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DRM_OS_STRUCTPROC *p, drm_device_t *dev);
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extern drm_file_t *DRM(find_file_by_proc)(drm_device_t *dev,
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DRM_OS_STRUCTPROC *p);
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/* Memory management support (drm_memory.h) */
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extern int DRM(mem_info) DRM_SYSCTL_HANDLER_ARGS;
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/* SysCtl Support (drm_sysctl.h) */
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extern int DRM(sysctl_init)(drm_device_t *dev);
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extern int DRM(sysctl_cleanup)(drm_device_t *dev);
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