Import of XFree86 3.9.18X_3_9_18

1 files changed, 636 insertions, 0 deletions

diff --git a/linux/mga_bufs.c b/linux/mga_bufs.c
new file mode 100644
index 00000000..34f1112a
--- /dev/null
+++ b/linux/mga_bufs.c
@@ -0,0 +1,636 @@
+/* mga_bufs.c -- IOCTLs to manage buffers -*- linux-c -*-
+ * Created: Thu Jan 6 01:47:26 2000 by jhartmann@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * 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@precisioninsight.com>
+ *	    Jeff Hartmann <jhartmann@precisioninsight.com>
+ * 
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/linux/drm/kernel/mga_bufs.c,v 1.1 2000/02/11 17:26:06 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+#include "mga_drv.h"
+#include "mga_dma.h"
+#include "linux/un.h"
+
+
+int mga_addbufs_agp(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;
+   drm_buf_desc_t request;
+   drm_buf_entry_t *entry;
+   drm_buf_t *buf;
+   unsigned long offset;
+   unsigned long agp_offset;
+   int count;
+   int order;
+   int size;
+   int alignment;
+   int page_order;
+   int total;
+   int byte_count;
+   int i;
+
+   if (!dma) return -EINVAL;
+
+   copy_from_user_ret(&request,
+		      (drm_buf_desc_t *)arg,
+		      sizeof(request),
+		      -EFAULT);
+
+   count = request.count;
+   order = drm_order(request.size);
+   size	= 1 << order;
+   agp_offset = request.agp_start;
+   alignment  = (request.flags & _DRM_PAGE_ALIGN) ? PAGE_ALIGN(size) :size;
+   page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
+   total = PAGE_SIZE << page_order;
+   byte_count = 0;
+
+   DRM_DEBUG("count: %d\n", count);
+   DRM_DEBUG("order: %d\n", order);
+   DRM_DEBUG("size: %d\n", size);
+   DRM_DEBUG("agp_offset: %d\n", agp_offset);
+   DRM_DEBUG("alignment: %d\n", alignment);
+   DRM_DEBUG("page_order: %d\n", page_order);
+   DRM_DEBUG("total: %d\n", total);
+   DRM_DEBUG("byte_count: %d\n", byte_count);
+
+   if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL;
+   if (dev->queue_count) return -EBUSY; /* Not while in use */
+   spin_lock(&dev->count_lock);
+   if (dev->buf_use) {
+      spin_unlock(&dev->count_lock);
+      return -EBUSY;
+   }
+   atomic_inc(&dev->buf_alloc);
+   spin_unlock(&dev->count_lock);
+   
+   down(&dev->struct_sem);
+   entry = &dma->bufs[order];
+   if (entry->buf_count) {
+      up(&dev->struct_sem);
+      atomic_dec(&dev->buf_alloc);
+      return -ENOMEM; /* May only call once for each order */
+   }
+   
+   entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
+			      DRM_MEM_BUFS);
+   if (!entry->buflist) {
+      up(&dev->struct_sem);
+      atomic_dec(&dev->buf_alloc);
+      return -ENOMEM;
+   }
+   memset(entry->buflist, 0, count * sizeof(*entry->buflist));
+   
+   entry->buf_size   = size;
+   entry->page_order = page_order;
+   offset = 0;
+
+   
+   while(entry->buf_count < count) {
+      buf = &entry->buflist[entry->buf_count];
+      buf->idx = dma->buf_count + entry->buf_count;
+      buf->total = alignment;
+      buf->order = order;
+      buf->used = 0;
+
+      DRM_DEBUG("offset : %d\n", offset);
+
+      buf->offset = offset; /* Hrm */
+      buf->bus_address = dev->agp->base + agp_offset + offset;
+      buf->address = (void *)(agp_offset + offset + dev->agp->base);
+      buf->next = NULL;
+      buf->waiting = 0;
+      buf->pending = 0;
+      init_waitqueue_head(&buf->dma_wait);
+      buf->pid = 0;
+
+      buf->dev_private = drm_alloc(sizeof(drm_mga_buf_priv_t), DRM_MEM_BUFS);
+      buf->dev_priv_size = sizeof(drm_mga_buf_priv_t);
+
+#if DRM_DMA_HISTOGRAM
+      buf->time_queued = 0;
+      buf->time_dispatched = 0;
+      buf->time_completed = 0;
+      buf->time_freed = 0;
+#endif
+      offset = offset + alignment;
+      entry->buf_count++;
+      byte_count += PAGE_SIZE << page_order;
+      
+      DRM_DEBUG("buffer %d @ %p\n",
+	     entry->buf_count, buf->address);
+   }
+   
+   dma->buflist = drm_realloc(dma->buflist,
+			      dma->buf_count * sizeof(*dma->buflist),
+			      (dma->buf_count + entry->buf_count)
+			      * sizeof(*dma->buflist),
+			      DRM_MEM_BUFS);
+   for (i = dma->buf_count; i < dma->buf_count + entry->buf_count; i++)
+     dma->buflist[i] = &entry->buflist[i - dma->buf_count];
+   
+   dma->buf_count  += entry->buf_count;
+
+   DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
+
+   dma->byte_count += byte_count;
+
+   DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
+
+   drm_freelist_create(&entry->freelist, entry->buf_count);
+   for (i = 0; i < entry->buf_count; i++) {
+      drm_freelist_put(dev, &entry->freelist, &entry->buflist[i]);
+   }
+   
+   up(&dev->struct_sem);
+   
+   request.count = entry->buf_count;
+   request.size  = size;
+   
+   copy_to_user_ret((drm_buf_desc_t *)arg,
+		    &request,
+		    sizeof(request),
+		    -EFAULT);
+   
+   atomic_dec(&dev->buf_alloc);
+
+   DRM_DEBUG("count: %d\n", count);
+   DRM_DEBUG("order: %d\n", order);
+   DRM_DEBUG("size: %d\n", size);
+   DRM_DEBUG("agp_offset: %d\n", agp_offset);
+   DRM_DEBUG("alignment: %d\n", alignment);
+   DRM_DEBUG("page_order: %d\n", page_order);
+   DRM_DEBUG("total: %d\n", total);
+   DRM_DEBUG("byte_count: %d\n", byte_count);
+
+   dma->flags = _DRM_DMA_USE_AGP;
+
+   DRM_DEBUG("dma->flags : %lx\n", dma->flags);
+
+   return 0;
+}
+
+int mga_addbufs_pci(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;
+	drm_buf_desc_t	 request;
+	int		 count;
+	int		 order;
+	int		 size;
+	int		 total;
+	int		 page_order;
+	drm_buf_entry_t	 *entry;
+	unsigned long	 page;
+	drm_buf_t	 *buf;
+	int		 alignment;
+	unsigned long	 offset;
+	int		 i;
+	int		 byte_count;
+	int		 page_count;
+
+	if (!dma) return -EINVAL;
+
+	copy_from_user_ret(&request,
+			   (drm_buf_desc_t *)arg,
+			   sizeof(request),
+			   -EFAULT);
+
+	count	   = request.count;
+	order	   = drm_order(request.size);
+	size	   = 1 << order;
+	
+	DRM_DEBUG("count = %d, size = %d (%d), order = %d, queue_count = %d\n",
+		  request.count, request.size, size, order, dev->queue_count);
+
+	if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL;
+	if (dev->queue_count) return -EBUSY; /* Not while in use */
+
+	alignment  = (request.flags & _DRM_PAGE_ALIGN) ? PAGE_ALIGN(size) :size;
+	page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
+	total	   = PAGE_SIZE << page_order;
+
+	spin_lock(&dev->count_lock);
+	if (dev->buf_use) {
+		spin_unlock(&dev->count_lock);
+		return -EBUSY;
+	}
+	atomic_inc(&dev->buf_alloc);
+	spin_unlock(&dev->count_lock);
+	
+	down(&dev->struct_sem);
+	entry = &dma->bufs[order];
+	if (entry->buf_count) {
+		up(&dev->struct_sem);
+		atomic_dec(&dev->buf_alloc);
+		return -ENOMEM;	/* May only call once for each order */
+	}
+	
+	entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
+				   DRM_MEM_BUFS);
+	if (!entry->buflist) {
+		up(&dev->struct_sem);
+		atomic_dec(&dev->buf_alloc);
+		return -ENOMEM;
+	}
+	memset(entry->buflist, 0, count * sizeof(*entry->buflist));
+
+	entry->seglist = drm_alloc(count * sizeof(*entry->seglist),
+				   DRM_MEM_SEGS);
+	if (!entry->seglist) {
+		drm_free(entry->buflist,
+			 count * sizeof(*entry->buflist),
+			 DRM_MEM_BUFS);
+		up(&dev->struct_sem);
+		atomic_dec(&dev->buf_alloc);
+		return -ENOMEM;
+	}
+	memset(entry->seglist, 0, count * sizeof(*entry->seglist));
+
+	dma->pagelist = drm_realloc(dma->pagelist,
+				    dma->page_count * sizeof(*dma->pagelist),
+				    (dma->page_count + (count << page_order))
+				    * sizeof(*dma->pagelist),
+				    DRM_MEM_PAGES);
+	DRM_DEBUG("pagelist: %d entries\n",
+		  dma->page_count + (count << page_order));
+
+
+	entry->buf_size	  = size;
+	entry->page_order = page_order;
+	byte_count	  = 0;
+	page_count	  = 0;
+	while (entry->buf_count < count) {
+		if (!(page = drm_alloc_pages(page_order, DRM_MEM_DMA))) break;
+		entry->seglist[entry->seg_count++] = page;
+		for (i = 0; i < (1 << page_order); i++) {
+			DRM_DEBUG("page %d @ 0x%08lx\n",
+				  dma->page_count + page_count,
+				  page + PAGE_SIZE * i);
+			dma->pagelist[dma->page_count + page_count++]
+				= page + PAGE_SIZE * i;
+		}
+		for (offset = 0;
+		     offset + size <= total && entry->buf_count < count;
+		     offset += alignment, ++entry->buf_count) {
+			buf	     = &entry->buflist[entry->buf_count];
+			buf->idx     = dma->buf_count + entry->buf_count;
+			buf->total   = alignment;
+			buf->order   = order;
+			buf->used    = 0;
+			buf->offset  = (dma->byte_count + byte_count + offset);
+			buf->address = (void *)(page + offset);
+			buf->next    = NULL;
+			buf->waiting = 0;
+			buf->pending = 0;
+			init_waitqueue_head(&buf->dma_wait);
+			buf->pid     = 0;
+#if DRM_DMA_HISTOGRAM
+			buf->time_queued     = 0;
+			buf->time_dispatched = 0;
+			buf->time_completed  = 0;
+			buf->time_freed	     = 0;
+#endif
+			DRM_DEBUG("buffer %d @ %p\n",
+				  entry->buf_count, buf->address);
+		}
+		byte_count += PAGE_SIZE << page_order;
+	}
+
+	dma->buflist = drm_realloc(dma->buflist,
+				   dma->buf_count * sizeof(*dma->buflist),
+				   (dma->buf_count + entry->buf_count)
+				   * sizeof(*dma->buflist),
+				   DRM_MEM_BUFS);
+	for (i = dma->buf_count; i < dma->buf_count + entry->buf_count; i++)
+		dma->buflist[i] = &entry->buflist[i - dma->buf_count];
+
+	dma->buf_count	+= entry->buf_count;
+	dma->seg_count	+= entry->seg_count;
+	dma->page_count += entry->seg_count << page_order;
+	dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
+	
+	drm_freelist_create(&entry->freelist, entry->buf_count);
+	for (i = 0; i < entry->buf_count; i++) {
+		drm_freelist_put(dev, &entry->freelist, &entry->buflist[i]);
+	}
+	
+	up(&dev->struct_sem);
+
+	request.count = entry->buf_count;
+	request.size  = size;
+
+	copy_to_user_ret((drm_buf_desc_t *)arg,
+			 &request,
+			 sizeof(request),
+			 -EFAULT);
+	
+	atomic_dec(&dev->buf_alloc);
+	return 0;
+}
+
+int mga_addbufs(struct inode *inode, struct file *filp, unsigned int cmd,
+		unsigned long arg)
+{
+   drm_buf_desc_t	 request;
+
+   copy_from_user_ret(&request,
+		      (drm_buf_desc_t *)arg,
+		      sizeof(request),
+		      -EFAULT);
+
+   if(request.flags & _DRM_AGP_BUFFER)
+     return mga_addbufs_agp(inode, filp, cmd, arg);
+   else
+     return mga_addbufs_pci(inode, filp, cmd, arg);
+}
+
+int mga_infobufs(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;
+	drm_buf_info_t	 request;
+	int		 i;
+	int		 count;
+
+	if (!dma) return -EINVAL;
+
+	spin_lock(&dev->count_lock);
+	if (atomic_read(&dev->buf_alloc)) {
+		spin_unlock(&dev->count_lock);
+		return -EBUSY;
+	}
+	++dev->buf_use;		/* Can't allocate more after this call */
+	spin_unlock(&dev->count_lock);
+
+	copy_from_user_ret(&request,
+			   (drm_buf_info_t *)arg,
+			   sizeof(request),
+			   -EFAULT);
+
+	for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
+		if (dma->bufs[i].buf_count) ++count;
+	}
+	
+	DRM_DEBUG("count = %d\n", count);
+	
+	if (request.count >= count) {
+		for (i = 0, count = 0; i < DRM_MAX_ORDER+1; i++) {
+			if (dma->bufs[i].buf_count) {
+				copy_to_user_ret(&request.list[count].count,
+						 &dma->bufs[i].buf_count,
+						 sizeof(dma->bufs[0]
+							.buf_count),
+						 -EFAULT);
+				copy_to_user_ret(&request.list[count].size,
+						 &dma->bufs[i].buf_size,
+						 sizeof(dma->bufs[0].buf_size),
+						 -EFAULT);
+				copy_to_user_ret(&request.list[count].low_mark,
+						 &dma->bufs[i]
+						 .freelist.low_mark,
+						 sizeof(dma->bufs[0]
+							.freelist.low_mark),
+						 -EFAULT);
+				copy_to_user_ret(&request.list[count]
+						 .high_mark,
+						 &dma->bufs[i]
+						 .freelist.high_mark,
+						 sizeof(dma->bufs[0]
+							.freelist.high_mark),
+						 -EFAULT);
+				DRM_DEBUG("%d %d %d %d %d\n",
+					  i,
+					  dma->bufs[i].buf_count,
+					  dma->bufs[i].buf_size,
+					  dma->bufs[i].freelist.low_mark,
+					  dma->bufs[i].freelist.high_mark);
+				++count;
+			}
+		}
+	}
+	request.count = count;
+
+	copy_to_user_ret((drm_buf_info_t *)arg,
+			 &request,
+			 sizeof(request),
+			 -EFAULT);
+	
+	return 0;
+}
+
+int mga_markbufs(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;
+	drm_buf_desc_t	 request;
+	int		 order;
+	drm_buf_entry_t	 *entry;
+
+	if (!dma) return -EINVAL;
+
+	copy_from_user_ret(&request,
+			   (drm_buf_desc_t *)arg,
+			   sizeof(request),
+			   -EFAULT);
+
+	DRM_DEBUG("%d, %d, %d\n",
+		  request.size, request.low_mark, request.high_mark);
+	order = drm_order(request.size);
+	if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER) return -EINVAL;
+	entry = &dma->bufs[order];
+
+	if (request.low_mark < 0 || request.low_mark > entry->buf_count)
+		return -EINVAL;
+	if (request.high_mark < 0 || request.high_mark > entry->buf_count)
+		return -EINVAL;
+
+	entry->freelist.low_mark  = request.low_mark;
+	entry->freelist.high_mark = request.high_mark;
+	
+	return 0;
+}
+
+int mga_freebufs(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;
+	drm_buf_free_t	 request;
+	int		 i;
+	int		 idx;
+	drm_buf_t	 *buf;
+
+	if (!dma) return -EINVAL;
+
+	copy_from_user_ret(&request,
+			   (drm_buf_free_t *)arg,
+			   sizeof(request),
+			   -EFAULT);
+
+	DRM_DEBUG("%d\n", request.count);
+	for (i = 0; i < request.count; i++) {
+		copy_from_user_ret(&idx,
+				   &request.list[i],
+				   sizeof(idx),
+				   -EFAULT);
+		if (idx < 0 || idx >= dma->buf_count) {
+			DRM_ERROR("Index %d (of %d max)\n",
+				  idx, dma->buf_count - 1);
+			return -EINVAL;
+		}
+		buf = dma->buflist[idx];
+		if (buf->pid != current->pid) {
+			DRM_ERROR("Process %d freeing buffer owned by %d\n",
+				  current->pid, buf->pid);
+			return -EINVAL;
+		}
+		drm_free_buffer(dev, buf);
+	}
+	
+	return 0;
+}
+
+int mga_mapbufs(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;
+	const int	 zero	 = 0;
+	unsigned long	 virtual;
+	unsigned long	 address;
+	drm_buf_map_t	 request;
+	int		 i;
+
+	if (!dma) return -EINVAL;
+	
+	DRM_DEBUG("\n");
+
+	spin_lock(&dev->count_lock);
+	if (atomic_read(&dev->buf_alloc)) {
+		spin_unlock(&dev->count_lock);
+	   DRM_DEBUG("Buzy\n");
+		return -EBUSY;
+	}
+	++dev->buf_use;		/* Can't allocate more after this call */
+	spin_unlock(&dev->count_lock);
+
+	copy_from_user_ret(&request,
+			   (drm_buf_map_t *)arg,
+			   sizeof(request),
+			   -EFAULT);
+
+	DRM_DEBUG("mga_mapbufs\n");
+   	DRM_DEBUG("dma->flags : %lx\n", dma->flags);
+   
+   if (request.count >= dma->buf_count) {
+      if(dma->flags & _DRM_DMA_USE_AGP) {
+	 drm_mga_private_t *dev_priv = dev->dev_private;
+	 drm_map_t *map = NULL;
+	 
+	 map = dev->maplist[dev_priv->buffer_map_idx];
+	 if (!map) {
+	    DRM_DEBUG("map is null\n");
+	    retcode = -EINVAL;
+	    goto done;
+	 }
+
+	 DRM_DEBUG("map->offset : %lx\n", map->offset);
+	 DRM_DEBUG("map->size : %lx\n", map->size);
+	 DRM_DEBUG("map->type : %d\n", map->type);
+	 DRM_DEBUG("map->flags : %x\n", map->flags);
+	 DRM_DEBUG("map->handle : %lx\n", map->handle);
+	 DRM_DEBUG("map->mtrr : %d\n", map->mtrr);
+
+	 virtual = do_mmap(filp, 0, map->size, PROT_READ|PROT_WRITE,
+			   MAP_SHARED, (unsigned long)map->offset);
+      } else {
+	      virtual = do_mmap(filp, 0, dma->byte_count,
+				PROT_READ|PROT_WRITE, MAP_SHARED, 0);
+      }
+      if (virtual > -1024UL) {
+	 /* Real error */
+	 DRM_DEBUG("mmap error\n");
+	 retcode = (signed long)virtual;
+	 goto done;
+      }
+      request.virtual = (void *)virtual;
+      
+      for (i = 0; i < dma->buf_count; i++) {
+	 if (copy_to_user(&request.list[i].idx,
+			  &dma->buflist[i]->idx,
+			  sizeof(request.list[0].idx))) {
+	    retcode = -EFAULT;
+	    goto done;
+	 }
+	 if (copy_to_user(&request.list[i].total,
+			  &dma->buflist[i]->total,
+			  sizeof(request.list[0].total))) {
+	    retcode = -EFAULT;
+	    goto done;
+	 }
+	 if (copy_to_user(&request.list[i].used,
+			  &zero,
+			  sizeof(zero))) {
+	    retcode = -EFAULT;
+	    goto done;
+	 }
+	 address = virtual + dma->buflist[i]->offset;
+	 if (copy_to_user(&request.list[i].address,
+			  &address,
+			  sizeof(address))) {
+	    retcode = -EFAULT;
+	    goto done;
+	 }
+      }
+   }
+   done:
+   request.count = dma->buf_count;
+   DRM_DEBUG("%d buffers, retcode = %d\n", request.count, retcode);
+   
+   copy_to_user_ret((drm_buf_map_t *)arg,
+		    &request,
+		    sizeof(request),
+		    -EFAULT);
+
+   DRM_DEBUG("retcode : %d\n", retcode);
+
+   return retcode;
+}