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-rw-r--r--linux/i810_bufs.c584
1 files changed, 584 insertions, 0 deletions
diff --git a/linux/i810_bufs.c b/linux/i810_bufs.c
new file mode 100644
index 00000000..49455b43
--- /dev/null
+++ b/linux/i810_bufs.c
@@ -0,0 +1,584 @@
+/* i810_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/i810_bufs.c,v 1.1 2000/02/11 17:26:04 dawes Exp $
+ *
+ */
+
+#define __NO_VERSION__
+#include "drmP.h"
+#include "linux/un.h"
+
+int i810_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;
+
+ 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;
+
+ while(entry->buf_count < count) {
+ 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 = agp_offset - dev->agp->base + offset;/* ?? */
+ buf->bus_address = agp_offset + offset;
+ buf->address = agp_offset + offset + dev->agp->base;
+ 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->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 i810_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 i810_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 i810_addbufs_agp(inode, filp, cmd, arg);
+ else
+ return i810_addbufs_pci(inode, filp, cmd, arg);
+}
+
+int i810_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 i810_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 i810_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 i810_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);
+ 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);
+
+ if (request.count >= dma->buf_count) {
+ if(dma->flags & _DRM_DMA_USE_AGP) {
+ /* This is an ugly vicious hack */
+ drm_map_t *map = NULL;
+ for(i = 0; i < dev->map_count; i++) {
+ map = dev->maplist[i];
+ if(map->type == _DRM_AGP) break;
+ }
+ if (i >= dev->map_count || !map) {
+ retcode = -EINVAL;
+ goto done;
+ }
+
+ virtual = do_mmap(filp, 0, map->size, PROT_READ|PROT_WRITE,
+ MAP_SHARED, (unsigned long)map->handle);
+ }
+ else {
+ virtual = do_mmap(filp, 0, dma->byte_count,
+ PROT_READ|PROT_WRITE, MAP_SHARED, 0);
+ }
+ if (virtual > -1024UL) {
+ /* Real error */
+ 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);
+
+ return retcode;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-05 21:24:46 +0000