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mesa-drm/linux-core/tdfx_drv.c
Jeff Hartmann 550dff98b0 Merged the mga-lock-debug-0-2-0-branch with the trunk. This includes 
several fixes including: (Jeff) Really disable multitexture (Broken
    since Mesa 3.4 integration.)
(Jeff) Various changes in mga_state.c in the kernel module, which includes
    a fix to the bug where the first OGL application hangs the machine
    w/out rendering anything. This also includes defines for the warp
    registers so they are easily human readable.
(Rik and Jeff) Fixed all the schedule loops in the kernel to look like they
    are supposed too.
(Jeff) Configurable agp modes: Add the option "AGPMode2x" or "AGPMode4x" to
    your XF86Config file.
(Rik) Various cleanups to the mga kernel driver to make it easier to read
    and debug.
(Rik) Removed alot of DRM_DEBUG statements from the kernel driver.
2000-09-27 21:32:19 +00:00

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/* tdfx.c -- tdfx driver -*- linux-c -*-
* Created: Thu Oct 7 10:38:32 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
* PRECISION INSIGHT 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>
* Daryll Strauss <daryll@valinux.com>
*
*/
/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/tdfx_drv.c,v 1.6 2000/08/28 02:43:16 tsi Exp $ */
#include <linux/config.h>
#include "drmP.h"
#include "tdfx_drv.h"
#define TDFX_NAME "tdfx"
#define TDFX_DESC "3dfx Banshee/Voodoo3+"
#define TDFX_DATE "20000910"
#define TDFX_MAJOR 1
#define TDFX_MINOR 0
#define TDFX_PATCHLEVEL 0
static drm_device_t tdfx_device;
drm_ctx_t tdfx_res_ctx;
static struct file_operations tdfx_fops = {
#if LINUX_VERSION_CODE >= 0x020400
/* This started being used during 2.4.0-test */
owner: THIS_MODULE,
#endif
open: tdfx_open,
flush: drm_flush,
release: tdfx_release,
ioctl: tdfx_ioctl,
mmap: drm_mmap,
read: drm_read,
fasync: drm_fasync,
poll: drm_poll,
};
static struct miscdevice tdfx_misc = {
minor: MISC_DYNAMIC_MINOR,
name: TDFX_NAME,
fops: &tdfx_fops,
};
static drm_ioctl_desc_t tdfx_ioctls[] = {
[DRM_IOCTL_NR(DRM_IOCTL_VERSION)] = { tdfx_version, 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_UNIQUE)] = { drm_getunique, 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_MAGIC)] = { drm_getmagic, 0, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_IRQ_BUSID)] = { drm_irq_busid, 0, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_SET_UNIQUE)] = { drm_setunique, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_BLOCK)] = { drm_block, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_UNBLOCK)] = { drm_unblock, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_AUTH_MAGIC)] = { drm_authmagic, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_ADD_MAP)] = { drm_addmap, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_ADD_CTX)] = { tdfx_addctx, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_RM_CTX)] = { tdfx_rmctx, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_MOD_CTX)] = { tdfx_modctx, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_GET_CTX)] = { tdfx_getctx, 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_SWITCH_CTX)] = { tdfx_switchctx, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_NEW_CTX)] = { tdfx_newctx, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_RES_CTX)] = { tdfx_resctx, 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_ADD_DRAW)] = { drm_adddraw, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_RM_DRAW)] = { drm_rmdraw, 1, 1 },
[DRM_IOCTL_NR(DRM_IOCTL_LOCK)] = { tdfx_lock, 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_UNLOCK)] = { tdfx_unlock, 1, 0 },
[DRM_IOCTL_NR(DRM_IOCTL_FINISH)] = { drm_finish, 1, 0 },
#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
[DRM_IOCTL_NR(DRM_IOCTL_AGP_ACQUIRE)] = {drm_agp_acquire, 1, 1},
[DRM_IOCTL_NR(DRM_IOCTL_AGP_RELEASE)] = {drm_agp_release, 1, 1},
[DRM_IOCTL_NR(DRM_IOCTL_AGP_ENABLE)] = {drm_agp_enable, 1, 1},
[DRM_IOCTL_NR(DRM_IOCTL_AGP_INFO)] = {drm_agp_info, 1, 1},
[DRM_IOCTL_NR(DRM_IOCTL_AGP_ALLOC)] = {drm_agp_alloc, 1, 1},
[DRM_IOCTL_NR(DRM_IOCTL_AGP_FREE)] = {drm_agp_free, 1, 1},
[DRM_IOCTL_NR(DRM_IOCTL_AGP_BIND)] = {drm_agp_unbind, 1, 1},
[DRM_IOCTL_NR(DRM_IOCTL_AGP_UNBIND)] = {drm_agp_bind, 1, 1},
#endif
};
#define TDFX_IOCTL_COUNT DRM_ARRAY_SIZE(tdfx_ioctls)
#ifdef MODULE
static char *tdfx = NULL;
#endif
MODULE_AUTHOR("VA Linux Systems, Inc.");
MODULE_DESCRIPTION("tdfx");
MODULE_PARM(tdfx, "s");
#ifndef MODULE
/* tdfx_options is called by the kernel to parse command-line options
* passed via the boot-loader (e.g., LILO). It calls the insmod option
* routine, drm_parse_drm.
*/
static int __init tdfx_options(char *str)
{
drm_parse_options(str);
return 1;
}
__setup("tdfx=", tdfx_options);
#endif
static int tdfx_setup(drm_device_t *dev)
{
int i;
atomic_set(&dev->ioctl_count, 0);
atomic_set(&dev->vma_count, 0);
dev->buf_use = 0;
atomic_set(&dev->buf_alloc, 0);
atomic_set(&dev->total_open, 0);
atomic_set(&dev->total_close, 0);
atomic_set(&dev->total_ioctl, 0);
atomic_set(&dev->total_irq, 0);
atomic_set(&dev->total_ctx, 0);
atomic_set(&dev->total_locks, 0);
atomic_set(&dev->total_unlocks, 0);
atomic_set(&dev->total_contends, 0);
atomic_set(&dev->total_sleeps, 0);
for (i = 0; i < DRM_HASH_SIZE; i++) {
dev->magiclist[i].head = NULL;
dev->magiclist[i].tail = NULL;
}
dev->maplist = NULL;
dev->map_count = 0;
dev->vmalist = NULL;
dev->lock.hw_lock = NULL;
init_waitqueue_head(&dev->lock.lock_queue);
dev->queue_count = 0;
dev->queue_reserved = 0;
dev->queue_slots = 0;
dev->queuelist = NULL;
dev->irq = 0;
dev->context_flag = 0;
dev->interrupt_flag = 0;
dev->dma = 0;
dev->dma_flag = 0;
dev->last_context = 0;
dev->last_switch = 0;
dev->last_checked = 0;
init_timer(&dev->timer);
init_waitqueue_head(&dev->context_wait);
dev->ctx_start = 0;
dev->lck_start = 0;
dev->buf_rp = dev->buf;
dev->buf_wp = dev->buf;
dev->buf_end = dev->buf + DRM_BSZ;
dev->buf_async = NULL;
init_waitqueue_head(&dev->buf_readers);
init_waitqueue_head(&dev->buf_writers);
tdfx_res_ctx.handle=-1;
DRM_DEBUG("\n");
/* The kernel's context could be created here, but is now created
in drm_dma_enqueue. This is more resource-efficient for
hardware that does not do DMA, but may mean that
drm_select_queue fails between the time the interrupt is
initialized and the time the queues are initialized. */
return 0;
}
static int tdfx_takedown(drm_device_t *dev)
{
int i;
drm_magic_entry_t *pt, *next;
drm_map_t *map;
drm_vma_entry_t *vma, *vma_next;
DRM_DEBUG("\n");
down(&dev->struct_sem);
del_timer(&dev->timer);
if (dev->devname) {
drm_free(dev->devname, strlen(dev->devname)+1, DRM_MEM_DRIVER);
dev->devname = NULL;
}
if (dev->unique) {
drm_free(dev->unique, strlen(dev->unique)+1, DRM_MEM_DRIVER);
dev->unique = NULL;
dev->unique_len = 0;
}
/* Clear pid list */
for (i = 0; i < DRM_HASH_SIZE; i++) {
for (pt = dev->magiclist[i].head; pt; pt = next) {
next = pt->next;
drm_free(pt, sizeof(*pt), DRM_MEM_MAGIC);
}
dev->magiclist[i].head = dev->magiclist[i].tail = NULL;
}
#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
/* Clear AGP information */
if (dev->agp) {
drm_agp_mem_t *temp;
drm_agp_mem_t *temp_next;
temp = dev->agp->memory;
while(temp != NULL) {
temp_next = temp->next;
drm_free_agp(temp->memory, temp->pages);
drm_free(temp, sizeof(*temp), DRM_MEM_AGPLISTS);
temp = temp_next;
}
if (dev->agp->acquired) (*drm_agp.release)();
}
#endif
/* Clear vma list (only built for debugging) */
if (dev->vmalist) {
for (vma = dev->vmalist; vma; vma = vma_next) {
vma_next = vma->next;
drm_free(vma, sizeof(*vma), DRM_MEM_VMAS);
}
dev->vmalist = NULL;
}
/* Clear map area and mtrr information */
if (dev->maplist) {
for (i = 0; i < dev->map_count; i++) {
map = dev->maplist[i];
switch (map->type) {
case _DRM_REGISTERS:
case _DRM_FRAME_BUFFER:
#ifdef CONFIG_MTRR
if (map->mtrr >= 0) {
int retcode;
retcode = mtrr_del(map->mtrr,
map->offset,
map->size);
DRM_DEBUG("mtrr_del = %d\n", retcode);
}
#endif
drm_ioremapfree(map->handle, map->size);
break;
case _DRM_SHM:
drm_free_pages((unsigned long)map->handle,
drm_order(map->size)
- PAGE_SHIFT,
DRM_MEM_SAREA);
break;
case _DRM_AGP:
/* Do nothing here, because this is all
handled in the AGP/GART driver. */
break;
}
drm_free(map, sizeof(*map), DRM_MEM_MAPS);
}
drm_free(dev->maplist,
dev->map_count * sizeof(*dev->maplist),
DRM_MEM_MAPS);
dev->maplist = NULL;
dev->map_count = 0;
}
if (dev->lock.hw_lock) {
dev->lock.hw_lock = NULL; /* SHM removed */
dev->lock.pid = 0;
wake_up_interruptible(&dev->lock.lock_queue);
}
up(&dev->struct_sem);
return 0;
}
/* tdfx_init is called via init_module at module load time, or via
* linux/init/main.c (this is not currently supported). */
static int tdfx_init(void)
{
int retcode;
drm_device_t *dev = &tdfx_device;
DRM_DEBUG("\n");
memset((void *)dev, 0, sizeof(*dev));
dev->count_lock = SPIN_LOCK_UNLOCKED;
sema_init(&dev->struct_sem, 1);
#ifdef MODULE
drm_parse_options(tdfx);
#endif
if ((retcode = misc_register(&tdfx_misc))) {
DRM_ERROR("Cannot register \"%s\"\n", TDFX_NAME);
return retcode;
}
dev->device = MKDEV(MISC_MAJOR, tdfx_misc.minor);
dev->name = TDFX_NAME;
drm_mem_init();
drm_proc_init(dev);
#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
dev->agp = drm_agp_init();
#endif
if((retcode = drm_ctxbitmap_init(dev))) {
DRM_ERROR("Cannot allocate memory for context bitmap.\n");
drm_proc_cleanup();
misc_deregister(&tdfx_misc);
tdfx_takedown(dev);
return retcode;
}
DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
TDFX_NAME,
TDFX_MAJOR,
TDFX_MINOR,
TDFX_PATCHLEVEL,
TDFX_DATE,
tdfx_misc.minor);
return 0;
}
/* tdfx_cleanup is called via cleanup_module at module unload time. */
static void tdfx_cleanup(void)
{
drm_device_t *dev = &tdfx_device;
DRM_DEBUG("\n");
drm_proc_cleanup();
if (misc_deregister(&tdfx_misc)) {
DRM_ERROR("Cannot unload module\n");
} else {
DRM_INFO("Module unloaded\n");
}
drm_ctxbitmap_cleanup(dev);
tdfx_takedown(dev);
#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
if (dev->agp) {
drm_agp_uninit();
drm_free(dev->agp, sizeof(*dev->agp), DRM_MEM_AGPLISTS);
dev->agp = NULL;
}
#endif
}
module_init(tdfx_init);
module_exit(tdfx_cleanup);
int tdfx_version(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_version_t version;
int len;
if (copy_from_user(&version,
(drm_version_t *)arg,
sizeof(version)))
return -EFAULT;
#define DRM_COPY(name,value) \
len = strlen(value); \
if (len > name##_len) len = name##_len; \
name##_len = strlen(value); \
if (len && name) { \
if (copy_to_user(name, value, len)) \
return -EFAULT; \
}
version.version_major = TDFX_MAJOR;
version.version_minor = TDFX_MINOR;
version.version_patchlevel = TDFX_PATCHLEVEL;
DRM_COPY(version.name, TDFX_NAME);
DRM_COPY(version.date, TDFX_DATE);
DRM_COPY(version.desc, TDFX_DESC);
if (copy_to_user((drm_version_t *)arg,
&version,
sizeof(version)))
return -EFAULT;
return 0;
}
int tdfx_open(struct inode *inode, struct file *filp)
{
drm_device_t *dev = &tdfx_device;
int retcode = 0;
DRM_DEBUG("open_count = %d\n", dev->open_count);
if (!(retcode = drm_open_helper(inode, filp, dev))) {
#if LINUX_VERSION_CODE < 0x020333
MOD_INC_USE_COUNT; /* Needed before Linux 2.3.51 */
#endif
atomic_inc(&dev->total_open);
spin_lock(&dev->count_lock);
if (!dev->open_count++) {
spin_unlock(&dev->count_lock);
return tdfx_setup(dev);
}
spin_unlock(&dev->count_lock);
}
return retcode;
}
int tdfx_release(struct inode *inode, struct file *filp)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev;
int retcode = 0;
lock_kernel();
dev = priv->dev;
DRM_DEBUG("open_count = %d\n", dev->open_count);
if (!(retcode = drm_release(inode, filp))) {
#if LINUX_VERSION_CODE < 0x020333
MOD_DEC_USE_COUNT; /* Needed before Linux 2.3.51 */
#endif
atomic_inc(&dev->total_close);
spin_lock(&dev->count_lock);
if (!--dev->open_count) {
if (atomic_read(&dev->ioctl_count) || dev->blocked) {
DRM_ERROR("Device busy: %d %d\n",
atomic_read(&dev->ioctl_count),
dev->blocked);
spin_unlock(&dev->count_lock);
unlock_kernel();
return -EBUSY;
}
spin_unlock(&dev->count_lock);
unlock_kernel();
return tdfx_takedown(dev);
}
spin_unlock(&dev->count_lock);
}
unlock_kernel();
return retcode;
}
/* tdfx_ioctl is called whenever a process performs an ioctl on /dev/drm. */
int tdfx_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
int nr = DRM_IOCTL_NR(cmd);
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
int retcode = 0;
drm_ioctl_desc_t *ioctl;
drm_ioctl_t *func;
atomic_inc(&dev->ioctl_count);
atomic_inc(&dev->total_ioctl);
++priv->ioctl_count;
DRM_DEBUG("pid = %d, cmd = 0x%02x, nr = 0x%02x, dev 0x%x, auth = %d\n",
current->pid, cmd, nr, dev->device, priv->authenticated);
if (nr >= TDFX_IOCTL_COUNT) {
retcode = -EINVAL;
} else {
ioctl = &tdfx_ioctls[nr];
func = ioctl->func;
if (!func) {
DRM_DEBUG("no function\n");
retcode = -EINVAL;
} else if ((ioctl->root_only && !capable(CAP_SYS_ADMIN))
|| (ioctl->auth_needed && !priv->authenticated)) {
retcode = -EACCES;
} else {
retcode = (func)(inode, filp, cmd, arg);
}
}
atomic_dec(&dev->ioctl_count);
return retcode;
}
int tdfx_lock(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
DECLARE_WAITQUEUE(entry, current);
int ret = 0;
drm_lock_t lock;
#if DRM_DMA_HISTOGRAM
cycles_t start;
dev->lck_start = start = get_cycles();
#endif
if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
return -EFAULT;
if (lock.context == DRM_KERNEL_CONTEXT) {
DRM_ERROR("Process %d using kernel context %d\n",
current->pid, lock.context);
return -EINVAL;
}
DRM_DEBUG("%d (pid %d) requests lock (0x%08x), flags = 0x%08x\n",
lock.context, current->pid, dev->lock.hw_lock->lock,
lock.flags);
#if 0
/* dev->queue_count == 0 right now for
tdfx. FIXME? */
if (lock.context < 0 || lock.context >= dev->queue_count)
return -EINVAL;
#endif
if (!ret) {
#if 0
if (_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock)
!= lock.context) {
long j = jiffies - dev->lock.lock_time;
if (lock.context == tdfx_res_ctx.handle &&
j >= 0 && j < DRM_LOCK_SLICE) {
/* Can't take lock if we just had it and
there is contention. */
DRM_DEBUG("%d (pid %d) delayed j=%d dev=%d jiffies=%d\n",
lock.context, current->pid, j,
dev->lock.lock_time, jiffies);
current->state = TASK_INTERRUPTIBLE;
current->policy |= SCHED_YIELD;
schedule_timeout(DRM_LOCK_SLICE-j);
DRM_DEBUG("jiffies=%d\n", jiffies);
}
}
#endif
add_wait_queue(&dev->lock.lock_queue, &entry);
for (;;) {
current->state = TASK_INTERRUPTIBLE;
if (!dev->lock.hw_lock) {
/* Device has been unregistered */
ret = -EINTR;
break;
}
if (drm_lock_take(&dev->lock.hw_lock->lock,
lock.context)) {
dev->lock.pid = current->pid;
dev->lock.lock_time = jiffies;
atomic_inc(&dev->total_locks);
break; /* Got lock */
}
/* Contention */
atomic_inc(&dev->total_sleeps);
#if 1
current->policy |= SCHED_YIELD;
#endif
schedule();
if (signal_pending(current)) {
ret = -ERESTARTSYS;
break;
}
}
current->state = TASK_RUNNING;
remove_wait_queue(&dev->lock.lock_queue, &entry);
}
#if 0
if (!ret && dev->last_context != lock.context &&
lock.context != tdfx_res_ctx.handle &&
dev->last_context != tdfx_res_ctx.handle) {
add_wait_queue(&dev->context_wait, &entry);
current->state = TASK_INTERRUPTIBLE;
/* PRE: dev->last_context != lock.context */
tdfx_context_switch(dev, dev->last_context, lock.context);
/* POST: we will wait for the context
switch and will dispatch on a later call
when dev->last_context == lock.context
NOTE WE HOLD THE LOCK THROUGHOUT THIS
TIME! */
current->policy |= SCHED_YIELD;
schedule();
current->state = TASK_RUNNING;
remove_wait_queue(&dev->context_wait, &entry);
if (signal_pending(current)) {
ret = -EINTR;
} else if (dev->last_context != lock.context) {
DRM_ERROR("Context mismatch: %d %d\n",
dev->last_context, lock.context);
}
}
#endif
if (!ret) {
sigemptyset(&dev->sigmask);
sigaddset(&dev->sigmask, SIGSTOP);
sigaddset(&dev->sigmask, SIGTSTP);
sigaddset(&dev->sigmask, SIGTTIN);
sigaddset(&dev->sigmask, SIGTTOU);
dev->sigdata.context = lock.context;
dev->sigdata.lock = dev->lock.hw_lock;
block_all_signals(drm_notifier, &dev->sigdata, &dev->sigmask);
if (lock.flags & _DRM_LOCK_READY) {
/* Wait for space in DMA/FIFO */
}
if (lock.flags & _DRM_LOCK_QUIESCENT) {
/* Make hardware quiescent */
#if 0
tdfx_quiescent(dev);
#endif
}
}
#if LINUX_VERSION_CODE < 0x020400
if (lock.context != tdfx_res_ctx.handle) {
current->counter = 5;
current->priority = DEF_PRIORITY/4;
}
#endif
DRM_DEBUG("%d %s\n", lock.context, ret ? "interrupted" : "has lock");
#if DRM_DMA_HISTOGRAM
atomic_inc(&dev->histo.lacq[drm_histogram_slot(get_cycles() - start)]);
#endif
return ret;
}
int tdfx_unlock(struct inode *inode, struct file *filp, unsigned int cmd,
unsigned long arg)
{
drm_file_t *priv = filp->private_data;
drm_device_t *dev = priv->dev;
drm_lock_t lock;
if (copy_from_user(&lock, (drm_lock_t *)arg, sizeof(lock)))
return -EFAULT;
if (lock.context == DRM_KERNEL_CONTEXT) {
DRM_ERROR("Process %d using kernel context %d\n",
current->pid, lock.context);
return -EINVAL;
}
DRM_DEBUG("%d frees lock (%d holds)\n",
lock.context,
_DRM_LOCKING_CONTEXT(dev->lock.hw_lock->lock));
atomic_inc(&dev->total_unlocks);
if (_DRM_LOCK_IS_CONT(dev->lock.hw_lock->lock))
atomic_inc(&dev->total_contends);
drm_lock_transfer(dev, &dev->lock.hw_lock->lock, DRM_KERNEL_CONTEXT);
/* FIXME: Try to send data to card here */
if (!dev->context_flag) {
if (drm_lock_free(dev, &dev->lock.hw_lock->lock,
DRM_KERNEL_CONTEXT)) {
DRM_ERROR("\n");
}
}
#if LINUX_VERSION_CODE < 0x020400
if (lock.context != tdfx_res_ctx.handle) {
current->counter = 5;
current->priority = DEF_PRIORITY;
}
#endif
unblock_all_signals();
return 0;
}
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