summaryrefslogtreecommitdiff
path: root/bsd/gamma_dma.c
diff options
context:
space:
mode:
Diffstat (limited to 'bsd/gamma_dma.c')
-rw-r--r--bsd/gamma_dma.c611
1 files changed, 0 insertions, 611 deletions
diff --git a/bsd/gamma_dma.c b/bsd/gamma_dma.c
deleted file mode 100644
index 714554d2..00000000
--- a/bsd/gamma_dma.c
+++ /dev/null
@@ -1,611 +0,0 @@
-/* gamma_dma.c -- DMA support for GMX 2000 -*- linux-c -*-
- * Created: Fri Mar 19 14:30:16 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>
- *
- */
-
-
-
-#include "gamma.h"
-#include "drmP.h"
-#include "drm.h"
-#include "gamma_drm.h"
-#include "gamma_drv.h"
-
-
-static __inline__ void gamma_dma_dispatch(drm_device_t *dev, unsigned long address,
- unsigned long length)
-{
- drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
-
- GAMMA_WRITE(GAMMA_DMAADDRESS, DRM_VTOPHYS((void *)address));
- while (GAMMA_READ(GAMMA_GCOMMANDSTATUS) != 4)
- ;
- GAMMA_WRITE(GAMMA_DMACOUNT, length / 4);
-}
-
-void gamma_dma_quiescent_single(drm_device_t *dev)
-{
- drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
-
- while (GAMMA_READ(GAMMA_DMACOUNT))
- ;
- while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
- ;
-
- GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
- GAMMA_WRITE(GAMMA_SYNC, 0);
-
- do {
- while (!GAMMA_READ(GAMMA_OUTFIFOWORDS))
- ;
- } while (GAMMA_READ(GAMMA_OUTPUTFIFO) != GAMMA_SYNC_TAG);
-}
-
-void gamma_dma_quiescent_dual(drm_device_t *dev)
-{
- drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
-
- while (GAMMA_READ(GAMMA_DMACOUNT))
- ;
- while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3)
- ;
-
- GAMMA_WRITE(GAMMA_BROADCASTMASK, 3);
-
- GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10);
- GAMMA_WRITE(GAMMA_SYNC, 0);
-
- /* Read from first MX */
- do {
- while (!GAMMA_READ(GAMMA_OUTFIFOWORDS))
- ;
- } while (GAMMA_READ(GAMMA_OUTPUTFIFO) != GAMMA_SYNC_TAG);
-
- /* Read from second MX */
- do {
- while (!GAMMA_READ(GAMMA_OUTFIFOWORDS + 0x10000))
- ;
- } while (GAMMA_READ(GAMMA_OUTPUTFIFO + 0x10000) != GAMMA_SYNC_TAG);
-}
-
-void gamma_dma_ready(drm_device_t *dev)
-{
- drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
-
- while (GAMMA_READ(GAMMA_DMACOUNT))
- ;
-}
-
-static __inline__ int gamma_dma_is_ready(drm_device_t *dev)
-{
- drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
-
- return !GAMMA_READ(GAMMA_DMACOUNT);
-}
-
-void gamma_dma_service( DRM_IRQ_ARGS)
-{
- drm_device_t *dev = (drm_device_t *)arg;
- drm_device_dma_t *dma = dev->dma;
- drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
-
- atomic_inc(&dev->counts[6]); /* _DRM_STAT_IRQ */
- GAMMA_WRITE(GAMMA_GDELAYTIMER, 0xc350/2); /* 0x05S */
- GAMMA_WRITE(GAMMA_GCOMMANDINTFLAGS, 8);
- GAMMA_WRITE(GAMMA_GINTFLAGS, 0x2001);
- if (gamma_dma_is_ready(dev)) {
- /* Free previous buffer */
- if (test_and_set_bit(0, &dev->dma_flag)) return;
- if (dma->this_buffer) {
- gamma_free_buffer(dev, dma->this_buffer);
- dma->this_buffer = NULL;
- }
- clear_bit(0, &dev->dma_flag);
-
- taskqueue_enqueue(taskqueue_swi, &dev->task);
- }
-}
-
-/* Only called by gamma_dma_schedule. */
-static int gamma_do_dma(drm_device_t *dev, int locked)
-{
- unsigned long address;
- unsigned long length;
- drm_buf_t *buf;
- int retcode = 0;
- drm_device_dma_t *dma = dev->dma;
-#if DRM_DMA_HISTOGRAM
- cycles_t dma_start, dma_stop;
-#endif
-
- if (test_and_set_bit(0, &dev->dma_flag)) return DRM_ERR( EBUSY );
-
-#if DRM_DMA_HISTOGRAM
- dma_start = get_cycles();
-#endif
-
- if (!dma->next_buffer) {
- DRM_ERROR("No next_buffer\n");
- clear_bit(0, &dev->dma_flag);
- return DRM_ERR( EINVAL );
- }
-
- buf = dma->next_buffer;
- address = (unsigned long)buf->address;
- length = buf->used;
-
- DRM_DEBUG("context %d, buffer %d (%ld bytes)\n",
- buf->context, buf->idx, length);
-
- if (buf->list == DRM_LIST_RECLAIM) {
- gamma_clear_next_buffer(dev);
- gamma_free_buffer(dev, buf);
- clear_bit(0, &dev->dma_flag);
- return DRM_ERR( EINVAL );
- }
-
- if (!length) {
- DRM_ERROR("0 length buffer\n");
- gamma_clear_next_buffer(dev);
- gamma_free_buffer(dev, buf);
- clear_bit(0, &dev->dma_flag);
- return 0;
- }
-
- if (!gamma_dma_is_ready(dev)) {
- clear_bit(0, &dev->dma_flag);
- return DRM_ERR( EBUSY );
- }
-
- if (buf->while_locked) {
- if (!_DRM_LOCK_IS_HELD(dev->lock.hw_lock->lock)) {
- DRM_ERROR("Dispatching buffer %d from pid %d"
- " \"while locked\", but no lock held\n",
- buf->idx, buf->pid);
- }
- } else {
- if (!locked && !gamma_lock_take(&dev->lock.hw_lock->lock,
- DRM_KERNEL_CONTEXT)) {
- clear_bit(0, &dev->dma_flag);
- return DRM_ERR( EBUSY );
- }
- }
-
- if (dev->last_context != buf->context
- && !(dev->queuelist[buf->context]->flags
- & _DRM_CONTEXT_PRESERVED)) {
- /* PRE: dev->last_context != buf->context */
- if (DRM(context_switch)(dev, dev->last_context,
- buf->context)) {
- DRM(clear_next_buffer)(dev);
- DRM(free_buffer)(dev, buf);
- }
- retcode = EBUSY;
- goto cleanup;
-
- /* POST: we will wait for the context
- switch and will dispatch on a later call
- when dev->last_context == buf->context.
- NOTE WE HOLD THE LOCK THROUGHOUT THIS
- TIME! */
- }
-
- gamma_clear_next_buffer(dev);
- buf->pending = 1;
- buf->waiting = 0;
- buf->list = DRM_LIST_PEND;
-#if DRM_DMA_HISTOGRAM
- buf->time_dispatched = get_cycles();
-#endif
-
- gamma_dma_dispatch(dev, address, length);
- gamma_free_buffer(dev, dma->this_buffer);
- dma->this_buffer = buf;
-
- atomic_inc(&dev->counts[7]); /* _DRM_STAT_DMA */
- atomic_add(length, &dev->counts[8]); /* _DRM_STAT_PRIMARY */
-
- if (!buf->while_locked && !dev->context_flag && !locked) {
- if (gamma_lock_free(dev, &dev->lock.hw_lock->lock,
- DRM_KERNEL_CONTEXT)) {
- DRM_ERROR("\n");
- }
- }
-cleanup:
-
- clear_bit(0, &dev->dma_flag);
-
-#if DRM_DMA_HISTOGRAM
- dma_stop = get_cycles();
- atomic_inc(&dev->histo.dma[gamma_histogram_slot(dma_stop - dma_start)]);
-#endif
-
- return DRM_ERR( retcode );
-}
-
-static void gamma_dma_timer_bh(unsigned long dev)
-{
- gamma_dma_schedule((drm_device_t *)dev, 0);
-}
-
-void gamma_dma_immediate_bh(DRM_TASKQUEUE_ARGS)
-{
- gamma_dma_schedule(arg, 0);
-}
-
-int gamma_dma_schedule(drm_device_t *dev, int locked)
-{
- int next;
- drm_queue_t *q;
- drm_buf_t *buf;
- int retcode = 0;
- int processed = 0;
- int missed;
- int expire = 20;
- drm_device_dma_t *dma = dev->dma;
-#if DRM_DMA_HISTOGRAM
- cycles_t schedule_start;
-#endif
-
- if (test_and_set_bit(0, &dev->interrupt_flag)) {
- /* Not reentrant */
- atomic_inc(&dev->counts[10]); /* _DRM_STAT_MISSED */
- return DRM_ERR( EBUSY );
- }
- missed = atomic_read(&dev->counts[10]);
-
-#if DRM_DMA_HISTOGRAM
- schedule_start = get_cycles();
-#endif
-
-again:
- if (dev->context_flag) {
- clear_bit(0, &dev->interrupt_flag);
- return DRM_ERR( EBUSY );
- }
- if (dma->next_buffer) {
- /* Unsent buffer that was previously
- selected, but that couldn't be sent
- because the lock could not be obtained
- or the DMA engine wasn't ready. Try
- again. */
- if (!(retcode = gamma_do_dma(dev, locked))) ++processed;
- } else {
- do {
- next = gamma_select_queue(dev, gamma_dma_timer_bh);
- if (next >= 0) {
- q = dev->queuelist[next];
- buf = gamma_waitlist_get(&q->waitlist);
- dma->next_buffer = buf;
- dma->next_queue = q;
- if (buf && buf->list == DRM_LIST_RECLAIM) {
- gamma_clear_next_buffer(dev);
- gamma_free_buffer(dev, buf);
- }
- }
- } while (next >= 0 && !dma->next_buffer);
- if (dma->next_buffer) {
- if (!(retcode = gamma_do_dma(dev, locked))) {
- ++processed;
- }
- }
- }
-
- if (--expire) {
- if (missed != atomic_read(&dev->counts[10])) {
- if (gamma_dma_is_ready(dev)) goto again;
- }
- if (processed && gamma_dma_is_ready(dev)) {
- processed = 0;
- goto again;
- }
- }
-
- clear_bit(0, &dev->interrupt_flag);
-
-#if DRM_DMA_HISTOGRAM
- atomic_inc(&dev->histo.schedule[gamma_histogram_slot(get_cycles()
- - schedule_start)]);
-#endif
- return retcode;
-}
-
-static int gamma_dma_priority(drm_device_t *dev, drm_dma_t *d)
-{
- unsigned long address;
- unsigned long length;
- int must_free = 0;
- int retcode = 0;
- int i;
- int idx;
- drm_buf_t *buf;
- drm_buf_t *last_buf = NULL;
- drm_device_dma_t *dma = dev->dma;
- static int never;
-
- /* Turn off interrupt handling */
- while (test_and_set_bit(0, &dev->interrupt_flag)) {
- retcode = tsleep(&never, PZERO|PCATCH, "gamp1", 1);
- if (retcode)
- return retcode;
- }
- if (!(d->flags & _DRM_DMA_WHILE_LOCKED)) {
- while (!gamma_lock_take(&dev->lock.hw_lock->lock,
- DRM_KERNEL_CONTEXT)) {
- retcode = tsleep(&never, PZERO|PCATCH, "gamp2", 1);
- if (retcode)
- return retcode;
- }
- ++must_free;
- }
-
- for (i = 0; i < d->send_count; i++) {
- idx = d->send_indices[i];
- if (idx < 0 || idx >= dma->buf_count) {
- DRM_ERROR("Index %d (of %d max)\n",
- d->send_indices[i], dma->buf_count - 1);
- continue;
- }
- buf = dma->buflist[ idx ];
- if (buf->pid != DRM_CURRENTPID) {
- DRM_ERROR("Process %d using buffer owned by %d\n",
- DRM_CURRENTPID, buf->pid);
- retcode = EINVAL;
- goto cleanup;
- }
- if (buf->list != DRM_LIST_NONE) {
- DRM_ERROR("Process %d using %d's buffer on list %d\n",
- DRM_CURRENTPID, buf->pid, buf->list);
- retcode = EINVAL;
- goto cleanup;
- }
- /* This isn't a race condition on
- buf->list, since our concern is the
- buffer reclaim during the time the
- process closes the /dev/drm? handle, so
- it can't also be doing DMA. */
- buf->list = DRM_LIST_PRIO;
- buf->used = d->send_sizes[i];
- buf->context = d->context;
- buf->while_locked = d->flags & _DRM_DMA_WHILE_LOCKED;
- address = (unsigned long)buf->address;
- length = buf->used;
- if (!length) {
- DRM_ERROR("0 length buffer\n");
- }
- if (buf->pending) {
- DRM_ERROR("Sending pending buffer:"
- " buffer %d, offset %d\n",
- d->send_indices[i], i);
- retcode = EINVAL;
- goto cleanup;
- }
- if (buf->waiting) {
- DRM_ERROR("Sending waiting buffer:"
- " buffer %d, offset %d\n",
- d->send_indices[i], i);
- retcode = EINVAL;
- goto cleanup;
- }
- buf->pending = 1;
-
- if (dev->last_context != buf->context
- && !(dev->queuelist[buf->context]->flags
- & _DRM_CONTEXT_PRESERVED)) {
- /* PRE: dev->last_context != buf->context */
- DRM(context_switch)(dev, dev->last_context,
- buf->context);
- /* POST: we will wait for the context
- switch and will dispatch on a later call
- when dev->last_context == buf->context.
- NOTE WE HOLD THE LOCK THROUGHOUT THIS
- TIME! */
- retcode = tsleep(&dev->context_wait, PZERO|PCATCH,
- "gamctx", 0);
- if (retcode)
- goto cleanup;
- if (dev->last_context != buf->context) {
- DRM_ERROR("Context mismatch: %d %d\n",
- dev->last_context,
- buf->context);
- }
- }
-
-#if DRM_DMA_HISTOGRAM
- buf->time_queued = get_cycles();
- buf->time_dispatched = buf->time_queued;
-#endif
- gamma_dma_dispatch(dev, address, length);
- atomic_inc(&dev->counts[9]); /* _DRM_STAT_SPECIAL */
- atomic_add(length, &dev->counts[8]); /* _DRM_STAT_PRIMARY */
-
- if (last_buf) {
- gamma_free_buffer(dev, last_buf);
- }
- last_buf = buf;
- }
-
-
-cleanup:
- if (last_buf) {
- gamma_dma_ready(dev);
- gamma_free_buffer(dev, last_buf);
- }
-
- if (must_free && !dev->context_flag) {
- if (gamma_lock_free(dev, &dev->lock.hw_lock->lock,
- DRM_KERNEL_CONTEXT)) {
- DRM_ERROR("\n");
- }
- }
- clear_bit(0, &dev->interrupt_flag);
- return DRM_ERR( retcode );
-}
-
-static int gamma_dma_send_buffers(drm_device_t *dev, drm_dma_t *d)
-{
- drm_buf_t *last_buf = NULL;
- int retcode = 0;
- drm_device_dma_t *dma = dev->dma;
-
- if (d->flags & _DRM_DMA_BLOCK) {
- last_buf = dma->buflist[d->send_indices[d->send_count-1]];
- atomic_inc(&last_buf->dma_wait);
- }
-
- if ((retcode = gamma_dma_enqueue(dev, d))) {
- if (d->flags & _DRM_DMA_BLOCK)
- atomic_dec(&last_buf->dma_wait);
- return retcode;
- }
-
- gamma_dma_schedule(dev, 0);
-
- if (d->flags & _DRM_DMA_BLOCK) {
- DRM_DEBUG("%d waiting\n", DRM_CURRENTPID);
- for (;;) {
- retcode = tsleep(&last_buf->dma_wait, PZERO|PCATCH,
- "gamdw", 0);
- if (!last_buf->waiting
- && !last_buf->pending)
- break; /* finished */
- if (retcode)
- break;
- }
- atomic_dec(&last_buf->dma_wait);
- DRM_DEBUG("%d running\n", DRM_CURRENTPID);
- if (!retcode
- || (last_buf->list==DRM_LIST_PEND && !last_buf->pending)) {
- if (!last_buf->dma_wait) {
- gamma_free_buffer(dev, last_buf);
- }
- }
- if (retcode) {
- DRM_ERROR("ctx%d w%d p%d c%d i%d l%d %d/%d\n",
- d->context,
- last_buf->waiting,
- last_buf->pending,
- DRM_WAITCOUNT(dev, d->context),
- last_buf->idx,
- last_buf->list,
- last_buf->pid,
- DRM_CURRENTPID);
- }
- }
- return DRM_ERR( retcode );
-}
-
-int gamma_dma( DRM_IOCTL_ARGS )
-{
- DRM_DEVICE;
- drm_device_dma_t *dma = dev->dma;
- int retcode = 0;
- drm_dma_t d;
-
- DRM_COPY_FROM_USER_IOCTL(d, (drm_dma_t *) data, sizeof(d));
-
- if (d.send_count < 0 || d.send_count > dma->buf_count) {
- DRM_ERROR("Process %d trying to send %d buffers (of %d max)\n",
- DRM_CURRENTPID, d.send_count, dma->buf_count);
- return DRM_ERR( EINVAL );
- }
-
- if (d.request_count < 0 || d.request_count > dma->buf_count) {
- DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
- DRM_CURRENTPID, d.request_count, dma->buf_count);
- return DRM_ERR( EINVAL );
- }
-
- if (d.send_count) {
- if (d.flags & _DRM_DMA_PRIORITY)
- retcode = gamma_dma_priority(dev, &d);
- else
- retcode = gamma_dma_send_buffers(dev, &d);
- }
-
- d.granted_count = 0;
-
- if (!retcode && d.request_count) {
- retcode = gamma_dma_get_buffers(dev, &d);
- }
-
- DRM_DEBUG("%d returning, granted = %d\n",
- DRM_CURRENTPID, d.granted_count);
- DRM_COPY_TO_USER_IOCTL((drm_dma_t *) data, d, sizeof(d));
-
- return retcode;
-}
-
-void DRM(driver_irq_preinstall)(drm_device_t *dev) {
- drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
-#if 1
- while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2);
- GAMMA_WRITE( GAMMA_GCOMMANDMODE, 0x00000004 );
- GAMMA_WRITE( GAMMA_GDMACONTROL, 0x00000000 );
-#else
- while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2);
- while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2);
- GAMMA_WRITE( GAMMA_GCOMMANDMODE, GAMMA_QUEUED_DMA_MODE );
- GAMMA_WRITE( GAMMA_GDMACONTROL, 0x00000000 );
-#endif
-}
-
-void DRM(driver_irq_postinstall)(drm_device_t *dev) {
- drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
-#if 1
- while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2);
- while(GAMMA_READ(GAMMA_INFIFOSPACE) < 3);
- GAMMA_WRITE( GAMMA_GINTENABLE, 0x00002001 );
- GAMMA_WRITE( GAMMA_COMMANDINTENABLE, 0x00000008 );
- GAMMA_WRITE( GAMMA_GDELAYTIMER, 0x00039090 );
-#else
- while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2);
- while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2);
- GAMMA_WRITE( GAMMA_GINTENABLE, 0x00002000 );
- GAMMA_WRITE( GAMMA_COMMANDINTENABLE, 0x00000004 );
-#endif
-}
-
-void DRM(driver_irq_uninstall)( drm_device_t *dev ) {
- drm_gamma_private_t *dev_priv =
- (drm_gamma_private_t *)dev->dev_private;
- while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2);
- while(GAMMA_READ(GAMMA_INFIFOSPACE) < 3);
- GAMMA_WRITE( GAMMA_GDELAYTIMER, 0x00000000 );
- GAMMA_WRITE( GAMMA_COMMANDINTENABLE, 0x00000000 );
- GAMMA_WRITE( GAMMA_GINTENABLE, 0x00000000 );
-}