diff options
Diffstat (limited to 'drivers/char/drm/gamma_dma.c')
| -rw-r--r-- | drivers/char/drm/gamma_dma.c | 946 |
1 files changed, 946 insertions, 0 deletions
diff --git a/drivers/char/drm/gamma_dma.c b/drivers/char/drm/gamma_dma.c new file mode 100644 index 00000000000..e486fb8d31e --- /dev/null +++ b/drivers/char/drm/gamma_dma.c @@ -0,0 +1,946 @@ +/* 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" + +#include <linux/interrupt.h> /* For task queue support */ +#include <linux/delay.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; + mb(); + while ( GAMMA_READ(GAMMA_INFIFOSPACE) < 2) + cpu_relax(); + + GAMMA_WRITE(GAMMA_DMAADDRESS, address); + + while (GAMMA_READ(GAMMA_GCOMMANDSTATUS) != 4) + cpu_relax(); + + 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)) + cpu_relax(); + + while (GAMMA_READ(GAMMA_INFIFOSPACE) < 2) + cpu_relax(); + + GAMMA_WRITE(GAMMA_FILTERMODE, 1 << 10); + GAMMA_WRITE(GAMMA_SYNC, 0); + + do { + while (!GAMMA_READ(GAMMA_OUTFIFOWORDS)) + cpu_relax(); + } 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)) + cpu_relax(); + + while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3) + cpu_relax(); + + 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)) + cpu_relax(); + } while (GAMMA_READ(GAMMA_OUTPUTFIFO) != GAMMA_SYNC_TAG); + + /* Read from second MX */ + do { + while (!GAMMA_READ(GAMMA_OUTFIFOWORDS + 0x10000)) + cpu_relax(); + } 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)) + cpu_relax(); +} + +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)); +} + +irqreturn_t gamma_driver_irq_handler( 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; + + /* FIXME: should check whether we're actually interested in the interrupt? */ + atomic_inc(&dev->counts[6]); /* _DRM_STAT_IRQ */ + + while (GAMMA_READ(GAMMA_INFIFOSPACE) < 3) + cpu_relax(); + + 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 IRQ_HANDLED; + if (dma->this_buffer) { + gamma_free_buffer(dev, dma->this_buffer); + dma->this_buffer = NULL; + } + clear_bit(0, &dev->dma_flag); + + /* Dispatch new buffer */ + schedule_work(&dev->work); + } + return IRQ_HANDLED; +} + +/* 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 (test_and_set_bit(0, &dev->dma_flag)) return -EBUSY; + + + if (!dma->next_buffer) { + DRM_ERROR("No next_buffer\n"); + clear_bit(0, &dev->dma_flag); + return -EINVAL; + } + + buf = dma->next_buffer; + /* WE NOW ARE ON LOGICAL PAGES!! - using page table setup in dma_init */ + /* So we pass the buffer index value into the physical page offset */ + address = buf->idx << 12; + 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 -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 -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, current->pid); + } + } else { + if (!locked && !gamma_lock_take(&dev->lock.hw_lock->lock, + DRM_KERNEL_CONTEXT)) { + clear_bit(0, &dev->dma_flag); + return -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; + + /* WE NOW ARE ON LOGICAL PAGES!!! - overriding address */ + address = buf->idx << 12; + + 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); + + + return retcode; +} + +static void gamma_dma_timer_bh(unsigned long dev) +{ + gamma_dma_schedule((drm_device_t *)dev, 0); +} + +void gamma_irq_immediate_bh(void *dev) +{ + gamma_dma_schedule(dev, 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 (test_and_set_bit(0, &dev->interrupt_flag)) { + /* Not reentrant */ + atomic_inc(&dev->counts[10]); /* _DRM_STAT_MISSED */ + return -EBUSY; + } + missed = atomic_read(&dev->counts[10]); + + +again: + if (dev->context_flag) { + clear_bit(0, &dev->interrupt_flag); + return -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); + + return retcode; +} + +static int gamma_dma_priority(struct file *filp, + 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; + int *send_indices = NULL; + int *send_sizes = NULL; + + DECLARE_WAITQUEUE(entry, current); + + /* Turn off interrupt handling */ + while (test_and_set_bit(0, &dev->interrupt_flag)) { + schedule(); + if (signal_pending(current)) return -EINTR; + } + if (!(d->flags & _DRM_DMA_WHILE_LOCKED)) { + while (!gamma_lock_take(&dev->lock.hw_lock->lock, + DRM_KERNEL_CONTEXT)) { + schedule(); + if (signal_pending(current)) { + clear_bit(0, &dev->interrupt_flag); + return -EINTR; + } + } + ++must_free; + } + + send_indices = DRM(alloc)(d->send_count * sizeof(*send_indices), + DRM_MEM_DRIVER); + if (send_indices == NULL) + return -ENOMEM; + if (copy_from_user(send_indices, d->send_indices, + d->send_count * sizeof(*send_indices))) { + retcode = -EFAULT; + goto cleanup; + } + + send_sizes = DRM(alloc)(d->send_count * sizeof(*send_sizes), + DRM_MEM_DRIVER); + if (send_sizes == NULL) + return -ENOMEM; + if (copy_from_user(send_sizes, d->send_sizes, + d->send_count * sizeof(*send_sizes))) { + retcode = -EFAULT; + goto cleanup; + } + + for (i = 0; i < d->send_count; i++) { + idx = send_indices[i]; + if (idx < 0 || idx >= dma->buf_count) { + DRM_ERROR("Index %d (of %d max)\n", + send_indices[i], dma->buf_count - 1); + continue; + } + buf = dma->buflist[ idx ]; + if (buf->filp != filp) { + DRM_ERROR("Process %d using buffer not owned\n", + current->pid); + retcode = -EINVAL; + goto cleanup; + } + if (buf->list != DRM_LIST_NONE) { + DRM_ERROR("Process %d using buffer on list %d\n", + current->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 = 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", + send_indices[i], i); + retcode = -EINVAL; + goto cleanup; + } + if (buf->waiting) { + DRM_ERROR("Sending waiting buffer:" + " buffer %d, offset %d\n", + 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)) { + add_wait_queue(&dev->context_wait, &entry); + current->state = TASK_INTERRUPTIBLE; + /* 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! */ + schedule(); + current->state = TASK_RUNNING; + remove_wait_queue(&dev->context_wait, &entry); + if (signal_pending(current)) { + retcode = -EINTR; + goto cleanup; + } + if (dev->last_context != buf->context) { + DRM_ERROR("Context mismatch: %d %d\n", + dev->last_context, + buf->context); + } + } + + 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 (send_indices) + DRM(free)(send_indices, d->send_count * sizeof(*send_indices), + DRM_MEM_DRIVER); + if (send_sizes) + DRM(free)(send_sizes, d->send_count * sizeof(*send_sizes), + DRM_MEM_DRIVER); + + 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 retcode; +} + +static int gamma_dma_send_buffers(struct file *filp, + drm_device_t *dev, drm_dma_t *d) +{ + DECLARE_WAITQUEUE(entry, current); + drm_buf_t *last_buf = NULL; + int retcode = 0; + drm_device_dma_t *dma = dev->dma; + int send_index; + + if (get_user(send_index, &d->send_indices[d->send_count-1])) + return -EFAULT; + + if (d->flags & _DRM_DMA_BLOCK) { + last_buf = dma->buflist[send_index]; + add_wait_queue(&last_buf->dma_wait, &entry); + } + + if ((retcode = gamma_dma_enqueue(filp, d))) { + if (d->flags & _DRM_DMA_BLOCK) + remove_wait_queue(&last_buf->dma_wait, &entry); + return retcode; + } + + gamma_dma_schedule(dev, 0); + + if (d->flags & _DRM_DMA_BLOCK) { + DRM_DEBUG("%d waiting\n", current->pid); + for (;;) { + current->state = TASK_INTERRUPTIBLE; + if (!last_buf->waiting && !last_buf->pending) + break; /* finished */ + schedule(); + if (signal_pending(current)) { + retcode = -EINTR; /* Can't restart */ + break; + } + } + current->state = TASK_RUNNING; + DRM_DEBUG("%d running\n", current->pid); + remove_wait_queue(&last_buf->dma_wait, &entry); + if (!retcode + || (last_buf->list==DRM_LIST_PEND && !last_buf->pending)) { + if (!waitqueue_active(&last_buf->dma_wait)) { + gamma_free_buffer(dev, last_buf); + } + } + if (retcode) { + DRM_ERROR("ctx%d w%d p%d c%ld i%d l%d pid:%d\n", + d->context, + last_buf->waiting, + last_buf->pending, + (long)DRM_WAITCOUNT(dev, d->context), + last_buf->idx, + last_buf->list, + current->pid); + } + } + return retcode; +} + +int gamma_dma(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_device_dma_t *dma = dev->dma; + int retcode = 0; + drm_dma_t __user *argp = (void __user *)arg; + drm_dma_t d; + + if (copy_from_user(&d, argp, sizeof(d))) + return -EFAULT; + + if (d.send_count < 0 || d.send_count > dma->buf_count) { + DRM_ERROR("Process %d trying to send %d buffers (of %d max)\n", + current->pid, d.send_count, dma->buf_count); + return -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", + current->pid, d.request_count, dma->buf_count); + return -EINVAL; + } + + if (d.send_count) { + if (d.flags & _DRM_DMA_PRIORITY) + retcode = gamma_dma_priority(filp, dev, &d); + else + retcode = gamma_dma_send_buffers(filp, dev, &d); + } + + d.granted_count = 0; + + if (!retcode && d.request_count) { + retcode = gamma_dma_get_buffers(filp, &d); + } + + DRM_DEBUG("%d returning, granted = %d\n", + current->pid, d.granted_count); + if (copy_to_user(argp, &d, sizeof(d))) + return -EFAULT; + + return retcode; +} + +/* ============================================================= + * DMA initialization, cleanup + */ + +static int gamma_do_init_dma( drm_device_t *dev, drm_gamma_init_t *init ) +{ + drm_gamma_private_t *dev_priv; + drm_device_dma_t *dma = dev->dma; + drm_buf_t *buf; + int i; + struct list_head *list; + unsigned long *pgt; + + DRM_DEBUG( "%s\n", __FUNCTION__ ); + + dev_priv = DRM(alloc)( sizeof(drm_gamma_private_t), + DRM_MEM_DRIVER ); + if ( !dev_priv ) + return -ENOMEM; + + dev->dev_private = (void *)dev_priv; + + memset( dev_priv, 0, sizeof(drm_gamma_private_t) ); + + dev_priv->num_rast = init->num_rast; + + list_for_each(list, &dev->maplist->head) { + drm_map_list_t *r_list = list_entry(list, drm_map_list_t, head); + if( r_list->map && + r_list->map->type == _DRM_SHM && + r_list->map->flags & _DRM_CONTAINS_LOCK ) { + dev_priv->sarea = r_list->map; + break; + } + } + + dev_priv->mmio0 = drm_core_findmap(dev, init->mmio0); + dev_priv->mmio1 = drm_core_findmap(dev, init->mmio1); + dev_priv->mmio2 = drm_core_findmap(dev, init->mmio2); + dev_priv->mmio3 = drm_core_findmap(dev, init->mmio3); + + dev_priv->sarea_priv = (drm_gamma_sarea_t *) + ((u8 *)dev_priv->sarea->handle + + init->sarea_priv_offset); + + if (init->pcimode) { + buf = dma->buflist[GLINT_DRI_BUF_COUNT]; + pgt = buf->address; + + for (i = 0; i < GLINT_DRI_BUF_COUNT; i++) { + buf = dma->buflist[i]; + *pgt = virt_to_phys((void*)buf->address) | 0x07; + pgt++; + } + + buf = dma->buflist[GLINT_DRI_BUF_COUNT]; + } else { + dev->agp_buffer_map = drm_core_findmap(dev, init->buffers_offset); + drm_core_ioremap( dev->agp_buffer_map, dev); + + buf = dma->buflist[GLINT_DRI_BUF_COUNT]; + pgt = buf->address; + + for (i = 0; i < GLINT_DRI_BUF_COUNT; i++) { + buf = dma->buflist[i]; + *pgt = (unsigned long)buf->address + 0x07; + pgt++; + } + + buf = dma->buflist[GLINT_DRI_BUF_COUNT]; + + while (GAMMA_READ(GAMMA_INFIFOSPACE) < 1); + GAMMA_WRITE( GAMMA_GDMACONTROL, 0xe); + } + while (GAMMA_READ(GAMMA_INFIFOSPACE) < 2); + GAMMA_WRITE( GAMMA_PAGETABLEADDR, virt_to_phys((void*)buf->address) ); + GAMMA_WRITE( GAMMA_PAGETABLELENGTH, 2 ); + + return 0; +} + +int gamma_do_cleanup_dma( drm_device_t *dev ) +{ + DRM_DEBUG( "%s\n", __FUNCTION__ ); + + /* Make sure interrupts are disabled here because the uninstall ioctl + * may not have been called from userspace and after dev_private + * is freed, it's too late. + */ + if (drm_core_check_feature(dev, DRIVER_HAVE_IRQ)) + if ( dev->irq_enabled ) + DRM(irq_uninstall)(dev); + + if ( dev->dev_private ) { + + if ( dev->agp_buffer_map != NULL ) + drm_core_ioremapfree( dev->agp_buffer_map, dev ); + + DRM(free)( dev->dev_private, sizeof(drm_gamma_private_t), + DRM_MEM_DRIVER ); + dev->dev_private = NULL; + } + + return 0; +} + +int gamma_dma_init( 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_gamma_init_t init; + + LOCK_TEST_WITH_RETURN( dev, filp ); + + if ( copy_from_user( &init, (drm_gamma_init_t __user *)arg, sizeof(init) ) ) + return -EFAULT; + + switch ( init.func ) { + case GAMMA_INIT_DMA: + return gamma_do_init_dma( dev, &init ); + case GAMMA_CLEANUP_DMA: + return gamma_do_cleanup_dma( dev ); + } + + return -EINVAL; +} + +static int gamma_do_copy_dma( drm_device_t *dev, drm_gamma_copy_t *copy ) +{ + drm_device_dma_t *dma = dev->dma; + unsigned int *screenbuf; + + DRM_DEBUG( "%s\n", __FUNCTION__ ); + + /* We've DRM_RESTRICTED this DMA buffer */ + + screenbuf = dma->buflist[ GLINT_DRI_BUF_COUNT + 1 ]->address; + +#if 0 + *buffer++ = 0x180; /* Tag (FilterMode) */ + *buffer++ = 0x200; /* Allow FBColor through */ + *buffer++ = 0x53B; /* Tag */ + *buffer++ = copy->Pitch; + *buffer++ = 0x53A; /* Tag */ + *buffer++ = copy->SrcAddress; + *buffer++ = 0x539; /* Tag */ + *buffer++ = copy->WidthHeight; /* Initiates transfer */ + *buffer++ = 0x53C; /* Tag - DMAOutputAddress */ + *buffer++ = virt_to_phys((void*)screenbuf); + *buffer++ = 0x53D; /* Tag - DMAOutputCount */ + *buffer++ = copy->Count; /* Reads HostOutFifo BLOCKS until ..*/ + + /* Data now sitting in dma->buflist[ GLINT_DRI_BUF_COUNT + 1 ] */ + /* Now put it back to the screen */ + + *buffer++ = 0x180; /* Tag (FilterMode) */ + *buffer++ = 0x400; /* Allow Sync through */ + *buffer++ = 0x538; /* Tag - DMARectangleReadTarget */ + *buffer++ = 0x155; /* FBSourceData | count */ + *buffer++ = 0x537; /* Tag */ + *buffer++ = copy->Pitch; + *buffer++ = 0x536; /* Tag */ + *buffer++ = copy->DstAddress; + *buffer++ = 0x535; /* Tag */ + *buffer++ = copy->WidthHeight; /* Initiates transfer */ + *buffer++ = 0x530; /* Tag - DMAAddr */ + *buffer++ = virt_to_phys((void*)screenbuf); + *buffer++ = 0x531; + *buffer++ = copy->Count; /* initiates DMA transfer of color data */ +#endif + + /* need to dispatch it now */ + + return 0; +} + +int gamma_dma_copy( 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_gamma_copy_t copy; + + if ( copy_from_user( ©, (drm_gamma_copy_t __user *)arg, sizeof(copy) ) ) + return -EFAULT; + + return gamma_do_copy_dma( dev, © ); +} + +/* ============================================================= + * Per Context SAREA Support + */ + +int gamma_getsareactx(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_ctx_priv_map_t __user *argp = (void __user *)arg; + drm_ctx_priv_map_t request; + drm_map_t *map; + + if (copy_from_user(&request, argp, sizeof(request))) + return -EFAULT; + + down(&dev->struct_sem); + if ((int)request.ctx_id >= dev->max_context) { + up(&dev->struct_sem); + return -EINVAL; + } + + map = dev->context_sareas[request.ctx_id]; + up(&dev->struct_sem); + + request.handle = map->handle; + if (copy_to_user(argp, &request, sizeof(request))) + return -EFAULT; + return 0; +} + +int gamma_setsareactx(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_ctx_priv_map_t request; + drm_map_t *map = NULL; + drm_map_list_t *r_list; + struct list_head *list; + + if (copy_from_user(&request, + (drm_ctx_priv_map_t __user *)arg, + sizeof(request))) + return -EFAULT; + + down(&dev->struct_sem); + r_list = NULL; + list_for_each(list, &dev->maplist->head) { + r_list = list_entry(list, drm_map_list_t, head); + if(r_list->map && + r_list->map->handle == request.handle) break; + } + if (list == &(dev->maplist->head)) { + up(&dev->struct_sem); + return -EINVAL; + } + map = r_list->map; + up(&dev->struct_sem); + + if (!map) return -EINVAL; + + down(&dev->struct_sem); + if ((int)request.ctx_id >= dev->max_context) { + up(&dev->struct_sem); + return -EINVAL; + } + dev->context_sareas[request.ctx_id] = map; + up(&dev->struct_sem); + return 0; +} + +void gamma_driver_irq_preinstall( drm_device_t *dev ) { + drm_gamma_private_t *dev_priv = + (drm_gamma_private_t *)dev->dev_private; + + while(GAMMA_READ(GAMMA_INFIFOSPACE) < 2) + cpu_relax(); + + GAMMA_WRITE( GAMMA_GCOMMANDMODE, 0x00000004 ); + GAMMA_WRITE( GAMMA_GDMACONTROL, 0x00000000 ); +} + +void gamma_driver_irq_postinstall( drm_device_t *dev ) { + drm_gamma_private_t *dev_priv = + (drm_gamma_private_t *)dev->dev_private; + + while(GAMMA_READ(GAMMA_INFIFOSPACE) < 3) + cpu_relax(); + + GAMMA_WRITE( GAMMA_GINTENABLE, 0x00002001 ); + GAMMA_WRITE( GAMMA_COMMANDINTENABLE, 0x00000008 ); + GAMMA_WRITE( GAMMA_GDELAYTIMER, 0x00039090 ); +} + +void gamma_driver_irq_uninstall( drm_device_t *dev ) { + drm_gamma_private_t *dev_priv = + (drm_gamma_private_t *)dev->dev_private; + if (!dev_priv) + return; + + while(GAMMA_READ(GAMMA_INFIFOSPACE) < 3) + cpu_relax(); + + GAMMA_WRITE( GAMMA_GDELAYTIMER, 0x00000000 ); + GAMMA_WRITE( GAMMA_COMMANDINTENABLE, 0x00000000 ); + GAMMA_WRITE( GAMMA_GINTENABLE, 0x00000000 ); +} + +extern drm_ioctl_desc_t DRM(ioctls)[]; + +static int gamma_driver_preinit(drm_device_t *dev) +{ + /* reset the finish ioctl */ + DRM(ioctls)[DRM_IOCTL_NR(DRM_IOCTL_FINISH)].func = DRM(finish); + return 0; +} + +static void gamma_driver_pretakedown(drm_device_t *dev) +{ + gamma_do_cleanup_dma(dev); +} + +static void gamma_driver_dma_ready(drm_device_t *dev) +{ + gamma_dma_ready(dev); +} + +static int gamma_driver_dma_quiescent(drm_device_t *dev) +{ + drm_gamma_private_t *dev_priv = ( + drm_gamma_private_t *)dev->dev_private; + if (dev_priv->num_rast == 2) + gamma_dma_quiescent_dual(dev); + else gamma_dma_quiescent_single(dev); + return 0; +} + +void gamma_driver_register_fns(drm_device_t *dev) +{ + dev->driver_features = DRIVER_USE_AGP | DRIVER_USE_MTRR | DRIVER_PCI_DMA | DRIVER_HAVE_DMA | DRIVER_HAVE_IRQ; + DRM(fops).read = gamma_fops_read; + DRM(fops).poll = gamma_fops_poll; + dev->driver.preinit = gamma_driver_preinit; + dev->driver.pretakedown = gamma_driver_pretakedown; + dev->driver.dma_ready = gamma_driver_dma_ready; + dev->driver.dma_quiescent = gamma_driver_dma_quiescent; + dev->driver.dma_flush_block_and_flush = gamma_flush_block_and_flush; + dev->driver.dma_flush_unblock = gamma_flush_unblock; +} |