/*
*/
/*
* drm_context.h -- IOCTLs for generic contexts -*- linux-c -*-
* Created: Fri Nov 24 18:31:37 2000 by gareth@valinux.com
*/
/*
* Copyright 1999, 2000 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,
* 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
* 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 "drmP.h"
#include "drm_io32.h"
static inline int
{
int b;
volatile int *ptr = (volatile int *)p;
for (b = 0; b < max; b += 32) {
if (ptr[b >> 5] != ~0) {
for (;;) {
return (b);
b++;
}
}
}
return (max);
}
/*
* Context bitmap support
*/
void
{
DRM_ERROR("drm_ctxbitmap_free: Attempt to free\
invalid context handle: %d\n",
return;
}
DRM_LOCK();
DRM_UNLOCK();
}
/* Is supposed to return -1 if any error by calling functions */
int
{
int bit;
return (-1);
DRM_LOCK();
if (bit >= DRM_MAX_CTXBITMAP) {
DRM_UNLOCK();
return (-1);
}
sizeof (*dev->context_sareas),
dev->max_context *
sizeof (*dev->context_sareas),
if (ctx_sareas == NULL) {
DRM_UNLOCK();
return (-1);
}
} else {
/* max_context == 1 at this point */
DRM_UNLOCK();
return (-1);
}
}
}
DRM_UNLOCK();
return (bit);
}
int
{
int i;
int temp;
DRM_LOCK();
DRM_UNLOCK();
return (ENOMEM);
}
DRM_UNLOCK();
for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
}
return (0);
}
void
{
DRM_LOCK();
sizeof (*dev->context_sareas) *
DRM_UNLOCK();
}
/*
* Per Context SAREA Support
*/
/*ARGSUSED*/
int
{
#ifdef _MULTI_DATAMODEL
sizeof (drm_ctx_priv_map_32_t));
} else
#endif
sizeof (request));
DRM_LOCK();
dev->max_context) {
DRM_UNLOCK();
return (EINVAL);
}
DRM_UNLOCK();
if (!map)
return (EINVAL);
#ifdef _MULTI_DATAMODEL
sizeof (drm_ctx_priv_map_32_t));
} else
#endif
DRM_COPYTO_WITH_RETURN((void *)data,
return (0);
}
/*ARGSUSED*/
int
{
#ifdef _MULTI_DATAMODEL
sizeof (drm_ctx_priv_map_32_t));
} else
#endif
DRM_LOCK();
if (dev->max_context < 0)
goto bad;
goto bad;
DRM_UNLOCK();
return (0);
}
}
bad:
DRM_UNLOCK();
return (EINVAL);
}
/*
* The actual DRM context handling routines
*/
int
{
DRM_ERROR("drm_context_switch: Reentering -- FIXME");
return (EBUSY);
}
DRM_DEBUG("drm_context_switch: Context switch from %d to %d",
return (0);
}
return (0);
}
int
{
"drm_context_switch_complete: Lock not held");
}
/*
* If a context switch is ever initiated
* when the kernel holds the lock, release
* that lock here.
*/
return (0);
}
/*ARGSUSED*/
int
{
int i;
#ifdef _MULTI_DATAMODEL
} else
#endif
for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
}
}
#ifdef _MULTI_DATAMODEL
sizeof (drm_ctx_res_32_t));
} else
#endif
return (0);
}
/*ARGSUSED*/
int
{
/* Skip kernel's context and get a new one. */
}
return (ENOMEM);
}
}
return (0);
}
/*ARGSUSED*/
int
{
/* This does nothing */
return (0);
}
/*ARGSUSED*/
int
{
/* This is 0, because we don't handle any context flags */
return (0);
}
/*ARGSUSED*/
int
{
}
/*ARGSUSED*/
int
{
return (0);
}
/*ARGSUSED*/
int
{
DRM_LOCK();
DRM_UNLOCK();
}
}
return (0);
}