summaryrefslogtreecommitdiff
path: root/bsd-core/drm_context.c
diff options
context:
space:
mode:
Diffstat (limited to 'bsd-core/drm_context.c')
-rw-r--r--bsd-core/drm_context.c730
1 files changed, 730 insertions, 0 deletions
diff --git a/bsd-core/drm_context.c b/bsd-core/drm_context.c
new file mode 100644
index 00000000..8d676a23
--- /dev/null
+++ b/bsd-core/drm_context.c
@@ -0,0 +1,730 @@
+/* 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,
+ * 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>
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+
+#if __HAVE_CTX_BITMAP
+
+/* ================================================================
+ * Context bitmap support
+ */
+
+void DRM(ctxbitmap_free)( drm_device_t *dev, int ctx_handle )
+{
+ if ( ctx_handle < 0 ) goto failed;
+ if ( !dev->ctx_bitmap ) goto failed;
+
+ if ( ctx_handle < DRM_MAX_CTXBITMAP ) {
+ DRM_OS_LOCK;
+ clear_bit( ctx_handle, dev->ctx_bitmap );
+ dev->context_sareas[ctx_handle] = NULL;
+ DRM_OS_UNLOCK;
+ return;
+ }
+failed:
+ DRM_ERROR( "Attempt to free invalid context handle: %d\n",
+ ctx_handle );
+ return;
+}
+
+int DRM(ctxbitmap_next)( drm_device_t *dev )
+{
+ int bit;
+
+ if(!dev->ctx_bitmap) return -1;
+
+ DRM_OS_LOCK;
+ bit = find_first_zero_bit( dev->ctx_bitmap, DRM_MAX_CTXBITMAP );
+ if ( bit < DRM_MAX_CTXBITMAP ) {
+ set_bit( bit, dev->ctx_bitmap );
+ DRM_DEBUG( "drm_ctxbitmap_next bit : %d\n", bit );
+ if((bit+1) > dev->max_context) {
+ dev->max_context = (bit+1);
+ if(dev->context_sareas) {
+ drm_map_t **ctx_sareas;
+
+ ctx_sareas = DRM(realloc)(dev->context_sareas,
+ (dev->max_context - 1) *
+ sizeof(*dev->context_sareas),
+ dev->max_context *
+ sizeof(*dev->context_sareas),
+ DRM_MEM_MAPS);
+ if(!ctx_sareas) {
+ clear_bit(bit, dev->ctx_bitmap);
+ DRM_OS_UNLOCK;
+ return -1;
+ }
+ dev->context_sareas = ctx_sareas;
+ dev->context_sareas[bit] = NULL;
+ } else {
+ /* max_context == 1 at this point */
+ dev->context_sareas = DRM(alloc)(
+ dev->max_context *
+ sizeof(*dev->context_sareas),
+ DRM_MEM_MAPS);
+ if(!dev->context_sareas) {
+ clear_bit(bit, dev->ctx_bitmap);
+ DRM_OS_UNLOCK;
+ return -1;
+ }
+ dev->context_sareas[bit] = NULL;
+ }
+ }
+ DRM_OS_UNLOCK;
+ return bit;
+ }
+ DRM_OS_UNLOCK;
+ return -1;
+}
+
+int DRM(ctxbitmap_init)( drm_device_t *dev )
+{
+ int i;
+ int temp;
+
+ DRM_OS_LOCK;
+ dev->ctx_bitmap = (unsigned long *) DRM(alloc)( PAGE_SIZE,
+ DRM_MEM_CTXBITMAP );
+ if ( dev->ctx_bitmap == NULL ) {
+ DRM_OS_UNLOCK;
+ DRM_OS_RETURN(ENOMEM);
+ }
+ memset( (void *)dev->ctx_bitmap, 0, PAGE_SIZE );
+ dev->context_sareas = NULL;
+ dev->max_context = -1;
+ DRM_OS_UNLOCK;
+
+ for ( i = 0 ; i < DRM_RESERVED_CONTEXTS ; i++ ) {
+ temp = DRM(ctxbitmap_next)( dev );
+ DRM_DEBUG( "drm_ctxbitmap_init : %d\n", temp );
+ }
+
+ return 0;
+}
+
+void DRM(ctxbitmap_cleanup)( drm_device_t *dev )
+{
+ DRM_OS_LOCK;
+ if( dev->context_sareas ) DRM(free)( dev->context_sareas,
+ sizeof(*dev->context_sareas) *
+ dev->max_context,
+ DRM_MEM_MAPS );
+ DRM(free)( (void *)dev->ctx_bitmap, PAGE_SIZE, DRM_MEM_CTXBITMAP );
+ DRM_OS_UNLOCK;
+}
+
+/* ================================================================
+ * Per Context SAREA Support
+ */
+
+int DRM(getsareactx)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_ctx_priv_map_t request;
+ drm_map_t *map;
+
+ DRM_OS_KRNFROMUSR( request, (drm_ctx_priv_map_t *)data,
+ sizeof(request) );
+
+ DRM_OS_LOCK;
+ if (dev->max_context < 0 || request.ctx_id >= (unsigned) dev->max_context) {
+ DRM_OS_UNLOCK;
+ DRM_OS_RETURN(EINVAL);
+ }
+
+ map = dev->context_sareas[request.ctx_id];
+ DRM_OS_UNLOCK;
+
+ request.handle = map->handle;
+
+ DRM_OS_KRNTOUSR( (drm_ctx_priv_map_t *)data, request, sizeof(request) );
+
+ return 0;
+}
+
+int DRM(setsareactx)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_ctx_priv_map_t request;
+ drm_map_t *map = NULL;
+ drm_map_list_entry_t *list;
+
+ DRM_OS_KRNFROMUSR( request, (drm_ctx_priv_map_t *)data,
+ sizeof(request) );
+
+ DRM_OS_LOCK;
+ TAILQ_FOREACH(list, dev->maplist, link) {
+ map=list->map;
+ if(map->handle == request.handle)
+ goto found;
+ }
+
+bad:
+ DRM_OS_UNLOCK;
+ return -EINVAL;
+
+found:
+ map = list->map;
+ if (!map) goto bad;
+ if (dev->max_context < 0)
+ goto bad;
+ if (request.ctx_id >= (unsigned) dev->max_context)
+ goto bad;
+ dev->context_sareas[request.ctx_id] = map;
+ DRM_OS_UNLOCK;
+ return 0;
+}
+
+/* ================================================================
+ * The actual DRM context handling routines
+ */
+
+int DRM(context_switch)( drm_device_t *dev, int old, int new )
+{
+ char buf[64];
+
+ if ( test_and_set_bit( 0, &dev->context_flag ) ) {
+ DRM_ERROR( "Reentering -- FIXME\n" );
+ DRM_OS_RETURN(EBUSY);
+ }
+
+#if __HAVE_DMA_HISTOGRAM
+ dev->ctx_start = get_cycles();
+#endif
+
+ DRM_DEBUG( "Context switch from %d to %d\n", old, new );
+
+ if ( new == dev->last_context ) {
+ clear_bit( 0, &dev->context_flag );
+ return 0;
+ }
+
+ if ( DRM(flags) & DRM_FLAG_NOCTX ) {
+ DRM(context_switch_complete)( dev, new );
+ } else {
+ sprintf( buf, "C %d %d\n", old, new );
+ DRM(write_string)( dev, buf );
+ }
+
+ return 0;
+}
+
+int DRM(context_switch_complete)( drm_device_t *dev, int new )
+{
+ dev->last_context = new; /* PRE/POST: This is the _only_ writer. */
+ dev->last_switch = jiffies;
+
+ if ( !_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock) ) {
+ DRM_ERROR( "Lock isn't held after context switch\n" );
+ }
+
+ /* If a context switch is ever initiated
+ when the kernel holds the lock, release
+ that lock here. */
+#if __HAVE_DMA_HISTOGRAM
+ atomic_inc( &dev->histo.ctx[DRM(histogram_slot)(get_cycles()
+ - dev->ctx_start)] );
+
+#endif
+ clear_bit( 0, &dev->context_flag );
+ DRM_OS_WAKEUP( &dev->context_wait );
+
+ return 0;
+}
+
+int DRM(resctx)( DRM_OS_IOCTL )
+{
+ drm_ctx_res_t res;
+ drm_ctx_t ctx;
+ int i;
+
+ DRM_OS_KRNFROMUSR( res, (drm_ctx_res_t *)data, sizeof(res) );
+
+ if ( res.count >= DRM_RESERVED_CONTEXTS ) {
+ memset( &ctx, 0, sizeof(ctx) );
+ for ( i = 0 ; i < DRM_RESERVED_CONTEXTS ; i++ ) {
+ ctx.handle = i;
+ if ( DRM_OS_COPYTOUSR( &res.contexts[i],
+ &i, sizeof(i) ) )
+ DRM_OS_RETURN(EFAULT);
+ }
+ }
+ res.count = DRM_RESERVED_CONTEXTS;
+
+ DRM_OS_KRNTOUSR( (drm_ctx_res_t *)data, res, sizeof(res) );
+
+ return 0;
+}
+
+int DRM(addctx)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_ctx_t ctx;
+
+ DRM_OS_KRNFROMUSR( ctx, (drm_ctx_t *)data, sizeof(ctx) );
+
+ ctx.handle = DRM(ctxbitmap_next)( dev );
+ if ( ctx.handle == DRM_KERNEL_CONTEXT ) {
+ /* Skip kernel's context and get a new one. */
+ ctx.handle = DRM(ctxbitmap_next)( dev );
+ }
+ DRM_DEBUG( "%d\n", ctx.handle );
+ if ( ctx.handle == -1 ) {
+ DRM_DEBUG( "Not enough free contexts.\n" );
+ /* Should this return -EBUSY instead? */
+ DRM_OS_RETURN(ENOMEM);
+ }
+
+ DRM_OS_KRNTOUSR( (drm_ctx_t *)data, ctx, sizeof(ctx) );
+
+ return 0;
+}
+
+int DRM(modctx)( DRM_OS_IOCTL )
+{
+ /* This does nothing */
+ return 0;
+}
+
+int DRM(getctx)( DRM_OS_IOCTL )
+{
+ drm_ctx_t ctx;
+
+ DRM_OS_KRNFROMUSR( ctx, (drm_ctx_t *)data, sizeof(ctx) );
+
+ /* This is 0, because we don't handle any context flags */
+ ctx.flags = 0;
+
+ DRM_OS_KRNTOUSR( (drm_ctx_t *)data, ctx, sizeof(ctx) );
+
+ return 0;
+}
+
+int DRM(switchctx)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_ctx_t ctx;
+
+ DRM_OS_KRNFROMUSR( ctx, (drm_ctx_t *)data, sizeof(ctx) );
+
+ DRM_DEBUG( "%d\n", ctx.handle );
+ return DRM(context_switch)( dev, dev->last_context, ctx.handle );
+}
+
+int DRM(newctx)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_ctx_t ctx;
+
+ DRM_OS_KRNFROMUSR( ctx, (drm_ctx_t *)data, sizeof(ctx) );
+
+ DRM_DEBUG( "%d\n", ctx.handle );
+ DRM(context_switch_complete)( dev, ctx.handle );
+
+ return 0;
+}
+
+int DRM(rmctx)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_ctx_t ctx;
+
+ DRM_OS_KRNFROMUSR( ctx, (drm_ctx_t *)data, sizeof(ctx) );
+
+ DRM_DEBUG( "%d\n", ctx.handle );
+ if ( ctx.handle != DRM_KERNEL_CONTEXT ) {
+ DRM(ctxbitmap_free)( dev, ctx.handle );
+ }
+
+ return 0;
+}
+
+
+#else /* __HAVE_CTX_BITMAP */
+
+/* ================================================================
+ * Old-style context support
+ */
+
+
+int DRM(context_switch)(drm_device_t *dev, int old, int new)
+{
+ char buf[64];
+ drm_queue_t *q;
+
+#if 0
+ atomic_inc(&dev->total_ctx);
+#endif
+
+ if (test_and_set_bit(0, &dev->context_flag)) {
+ DRM_ERROR("Reentering -- FIXME\n");
+ DRM_OS_RETURN(EBUSY);
+ }
+
+#if __HAVE_DMA_HISTOGRAM
+ dev->ctx_start = get_cycles();
+#endif
+
+ DRM_DEBUG("Context switch from %d to %d\n", old, new);
+
+ if (new >= dev->queue_count) {
+ clear_bit(0, &dev->context_flag);
+ DRM_OS_RETURN(EINVAL);
+ }
+
+ if (new == dev->last_context) {
+ clear_bit(0, &dev->context_flag);
+ return 0;
+ }
+
+ q = dev->queuelist[new];
+ atomic_inc(&q->use_count);
+ if (atomic_read(&q->use_count) == 1) {
+ atomic_dec(&q->use_count);
+ clear_bit(0, &dev->context_flag);
+ DRM_OS_RETURN(EINVAL);
+ }
+
+ if (DRM(flags) & DRM_FLAG_NOCTX) {
+ DRM(context_switch_complete)(dev, new);
+ } else {
+ sprintf(buf, "C %d %d\n", old, new);
+ DRM(write_string)(dev, buf);
+ }
+
+ atomic_dec(&q->use_count);
+
+ return 0;
+}
+
+int DRM(context_switch_complete)(drm_device_t *dev, int new)
+{
+ drm_device_dma_t *dma = dev->dma;
+
+ dev->last_context = new; /* PRE/POST: This is the _only_ writer. */
+ dev->last_switch = jiffies;
+
+ if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
+ DRM_ERROR("Lock isn't held after context switch\n");
+ }
+
+ if (!dma || !(dma->next_buffer && dma->next_buffer->while_locked)) {
+ if (DRM(lock_free)(dev, &dev->lock.hw_lock->lock,
+ DRM_KERNEL_CONTEXT)) {
+ DRM_ERROR("Cannot free lock\n");
+ }
+ }
+
+#if __HAVE_DMA_HISTOGRAM
+ atomic_inc(&dev->histo.ctx[DRM(histogram_slot)(get_cycles()
+ - dev->ctx_start)]);
+
+#endif
+ clear_bit(0, &dev->context_flag);
+ DRM_OS_WAKEUP_INT(&dev->context_wait);
+
+ return 0;
+}
+
+static int DRM(init_queue)(drm_device_t *dev, drm_queue_t *q, drm_ctx_t *ctx)
+{
+ DRM_DEBUG("\n");
+
+ if (atomic_read(&q->use_count) != 1
+ || atomic_read(&q->finalization)
+ || atomic_read(&q->block_count)) {
+ DRM_ERROR("New queue is already in use: u%ld f%ld b%ld\n",
+ (unsigned long)atomic_read(&q->use_count),
+ (unsigned long)atomic_read(&q->finalization),
+ (unsigned long)atomic_read(&q->block_count));
+ }
+
+ atomic_set(&q->finalization, 0);
+ atomic_set(&q->block_count, 0);
+ atomic_set(&q->block_read, 0);
+ atomic_set(&q->block_write, 0);
+ atomic_set(&q->total_queued, 0);
+ atomic_set(&q->total_flushed, 0);
+ atomic_set(&q->total_locks, 0);
+
+ q->write_queue = 0;
+ q->read_queue = 0;
+ q->flush_queue = 0;
+
+ q->flags = ctx->flags;
+
+ DRM(waitlist_create)(&q->waitlist, dev->dma->buf_count);
+
+ return 0;
+}
+
+
+/* drm_alloc_queue:
+PRE: 1) dev->queuelist[0..dev->queue_count] is allocated and will not
+ disappear (so all deallocation must be done after IOCTLs are off)
+ 2) dev->queue_count < dev->queue_slots
+ 3) dev->queuelist[i].use_count == 0 and
+ dev->queuelist[i].finalization == 0 if i not in use
+POST: 1) dev->queuelist[i].use_count == 1
+ 2) dev->queue_count < dev->queue_slots */
+
+static int DRM(alloc_queue)(drm_device_t *dev)
+{
+ int i;
+ drm_queue_t *queue;
+ int oldslots;
+ int newslots;
+ /* Check for a free queue */
+ for (i = 0; i < dev->queue_count; i++) {
+ atomic_inc(&dev->queuelist[i]->use_count);
+ if (atomic_read(&dev->queuelist[i]->use_count) == 1
+ && !atomic_read(&dev->queuelist[i]->finalization)) {
+ DRM_DEBUG("%d (free)\n", i);
+ return i;
+ }
+ atomic_dec(&dev->queuelist[i]->use_count);
+ }
+ /* Allocate a new queue */
+ DRM_OS_LOCK;
+
+ queue = gamma_alloc(sizeof(*queue), DRM_MEM_QUEUES);
+ memset(queue, 0, sizeof(*queue));
+ atomic_set(&queue->use_count, 1);
+
+ ++dev->queue_count;
+ if (dev->queue_count >= dev->queue_slots) {
+ oldslots = dev->queue_slots * sizeof(*dev->queuelist);
+ if (!dev->queue_slots) dev->queue_slots = 1;
+ dev->queue_slots *= 2;
+ newslots = dev->queue_slots * sizeof(*dev->queuelist);
+
+ dev->queuelist = DRM(realloc)(dev->queuelist,
+ oldslots,
+ newslots,
+ DRM_MEM_QUEUES);
+ if (!dev->queuelist) {
+ DRM_OS_UNLOCK;
+ DRM_DEBUG("out of memory\n");
+ DRM_OS_RETURN(ENOMEM);
+ }
+ }
+ dev->queuelist[dev->queue_count-1] = queue;
+
+ DRM_OS_UNLOCK;
+ DRM_DEBUG("%d (new)\n", dev->queue_count - 1);
+ return dev->queue_count - 1;
+}
+
+int DRM(resctx)( DRM_OS_IOCTL )
+{
+ drm_ctx_res_t res;
+ drm_ctx_t ctx;
+ int i;
+
+ DRM_DEBUG("%d\n", DRM_RESERVED_CONTEXTS);
+
+ DRM_OS_KRNFROMUSR( res, (drm_ctx_res_t *)data, sizeof(res) );
+
+ if (res.count >= DRM_RESERVED_CONTEXTS) {
+ memset(&ctx, 0, sizeof(ctx));
+ for (i = 0; i < DRM_RESERVED_CONTEXTS; i++) {
+ ctx.handle = i;
+ if (DRM_OS_COPYTOUSR(&res.contexts[i],
+ &i,
+ sizeof(i)))
+ DRM_OS_RETURN(EFAULT);
+ }
+ }
+ res.count = DRM_RESERVED_CONTEXTS;
+
+ DRM_OS_KRNTOUSR( (drm_ctx_res_t *)data, res, sizeof(res) );
+
+ return 0;
+}
+
+int DRM(addctx)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_ctx_t ctx;
+
+ DRM_OS_KRNFROMUSR( ctx, (drm_ctx_t *)data, sizeof(ctx) );
+
+ if ((ctx.handle = DRM(alloc_queue)(dev)) == DRM_KERNEL_CONTEXT) {
+ /* Init kernel's context and get a new one. */
+ DRM(init_queue)(dev, dev->queuelist[ctx.handle], &ctx);
+ ctx.handle = DRM(alloc_queue)(dev);
+ }
+ DRM(init_queue)(dev, dev->queuelist[ctx.handle], &ctx);
+ DRM_DEBUG("%d\n", ctx.handle);
+
+ DRM_OS_KRNTOUSR( (drm_ctx_t *)data, ctx, sizeof(ctx) );
+
+ return 0;
+}
+
+int DRM(modctx)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_ctx_t ctx;
+ drm_queue_t *q;
+
+ DRM_OS_KRNFROMUSR( ctx, (drm_ctx_t *)data, sizeof(ctx) );
+
+ DRM_DEBUG("%d\n", ctx.handle);
+
+ if (ctx.handle < 0 || ctx.handle >= dev->queue_count)
+ DRM_OS_RETURN(EINVAL);
+ q = dev->queuelist[ctx.handle];
+
+ atomic_inc(&q->use_count);
+ if (atomic_read(&q->use_count) == 1) {
+ /* No longer in use */
+ atomic_dec(&q->use_count);
+ DRM_OS_RETURN(EINVAL);
+ }
+
+ if (DRM_BUFCOUNT(&q->waitlist)) {
+ atomic_dec(&q->use_count);
+ DRM_OS_RETURN(EBUSY);
+ }
+
+ q->flags = ctx.flags;
+
+ atomic_dec(&q->use_count);
+ return 0;
+}
+
+int DRM(getctx)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_ctx_t ctx;
+ drm_queue_t *q;
+
+ DRM_OS_KRNFROMUSR( ctx, (drm_ctx_t *)data, sizeof(ctx) );
+
+ DRM_DEBUG("%d\n", ctx.handle);
+
+ if (ctx.handle >= dev->queue_count)
+ DRM_OS_RETURN(EINVAL);
+ q = dev->queuelist[ctx.handle];
+
+ atomic_inc(&q->use_count);
+ if (atomic_read(&q->use_count) == 1) {
+ /* No longer in use */
+ atomic_dec(&q->use_count);
+ DRM_OS_RETURN(EINVAL);
+ }
+
+ ctx.flags = q->flags;
+ atomic_dec(&q->use_count);
+
+ DRM_OS_KRNTOUSR( (drm_ctx_t *)data, ctx, sizeof(ctx) );
+
+ return 0;
+}
+
+int DRM(switchctx)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_ctx_t ctx;
+
+ DRM_OS_KRNFROMUSR( ctx, (drm_ctx_t *)data, sizeof(ctx) );
+
+ DRM_DEBUG("%d\n", ctx.handle);
+ return DRM(context_switch)(dev, dev->last_context, ctx.handle);
+}
+
+int DRM(newctx)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_ctx_t ctx;
+
+ DRM_OS_KRNFROMUSR( ctx, (drm_ctx_t *)data, sizeof(ctx) );
+
+ DRM_DEBUG("%d\n", ctx.handle);
+ DRM(context_switch_complete)(dev, ctx.handle);
+
+ return 0;
+}
+
+int DRM(rmctx)( DRM_OS_IOCTL )
+{
+ DRM_OS_DEVICE;
+ drm_ctx_t ctx;
+ drm_queue_t *q;
+ drm_buf_t *buf;
+
+ DRM_OS_KRNFROMUSR( ctx, (drm_ctx_t *)data, sizeof(ctx) );
+
+ DRM_DEBUG("%d\n", ctx.handle);
+
+ if (ctx.handle >= dev->queue_count) DRM_OS_RETURN(EINVAL);
+ q = dev->queuelist[ctx.handle];
+
+ atomic_inc(&q->use_count);
+ if (atomic_read(&q->use_count) == 1) {
+ /* No longer in use */
+ atomic_dec(&q->use_count);
+ DRM_OS_RETURN(EINVAL);
+ }
+
+ atomic_inc(&q->finalization); /* Mark queue in finalization state */
+ atomic_sub(2, &q->use_count); /* Mark queue as unused (pending
+ finalization) */
+
+ while (test_and_set_bit(0, &dev->interrupt_flag)) {
+ static int never;
+ int retcode;
+ retcode = tsleep(&never, PZERO|PCATCH, "never", 1);
+ if (retcode)
+ return retcode;
+ }
+ /* Remove queued buffers */
+ while ((buf = DRM(waitlist_get)(&q->waitlist))) {
+ DRM(free_buffer)(dev, buf);
+ }
+ clear_bit(0, &dev->interrupt_flag);
+
+ /* Wakeup blocked processes */
+ wakeup( &q->block_read );
+ wakeup( &q->block_write );
+ DRM_OS_WAKEUP_INT( &q->flush_queue );
+ /* Finalization over. Queue is made
+ available when both use_count and
+ finalization become 0, which won't
+ happen until all the waiting processes
+ stop waiting. */
+ atomic_dec(&q->finalization);
+ return 0;
+}
+
+#endif /* __HAVE_CTX_BITMAP */