patch-2.4.8 linux/drivers/char/drm/bufs.c
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- Lines: 544
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.4.7/linux/drivers/char/drm/bufs.c
- Orig date:
Wed Jul 25 17:10:19 2001
diff -u --recursive --new-file v2.4.7/linux/drivers/char/drm/bufs.c linux/drivers/char/drm/bufs.c
@@ -1,543 +0,0 @@
-/* bufs.c -- IOCTLs to manage buffers -*- linux-c -*-
- * Created: Tue Feb 2 08:37:54 1999 by faith@precisioninsight.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
- * 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>
- *
- */
-
-#define __NO_VERSION__
-#include <linux/config.h>
-#include "drmP.h"
-#include "linux/un.h"
-
- /* Compute order. Can be made faster. */
-int drm_order(unsigned long size)
-{
- int order;
- unsigned long tmp;
-
- for (order = 0, tmp = size; tmp >>= 1; ++order);
- if (size & ~(1 << order)) ++order;
- return order;
-}
-
-int drm_addmap(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_map_t *map;
-
- if (!(filp->f_mode & 3)) return -EACCES; /* Require read/write */
-
- map = drm_alloc(sizeof(*map), DRM_MEM_MAPS);
- if (!map) return -ENOMEM;
- if (copy_from_user(map, (drm_map_t *)arg, sizeof(*map))) {
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- return -EFAULT;
- }
-
- DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n",
- map->offset, map->size, map->type);
- if ((map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK))) {
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- return -EINVAL;
- }
- map->mtrr = -1;
- map->handle = 0;
-
- switch (map->type) {
- case _DRM_REGISTERS:
- case _DRM_FRAME_BUFFER:
-#ifndef __sparc__
- if (map->offset + map->size < map->offset
- || map->offset < virt_to_phys(high_memory)) {
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- return -EINVAL;
- }
-#endif
-#ifdef CONFIG_MTRR
- if (map->type == _DRM_FRAME_BUFFER
- || (map->flags & _DRM_WRITE_COMBINING)) {
- map->mtrr = mtrr_add(map->offset, map->size,
- MTRR_TYPE_WRCOMB, 1);
- }
-#endif
- map->handle = drm_ioremap(map->offset, map->size);
- break;
-
-
- case _DRM_SHM:
- map->handle = (void *)drm_alloc_pages(drm_order(map->size)
- - PAGE_SHIFT,
- DRM_MEM_SAREA);
- DRM_DEBUG("%ld %d %p\n", map->size, drm_order(map->size),
- map->handle);
- if (!map->handle) {
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- return -ENOMEM;
- }
- map->offset = (unsigned long)map->handle;
- if (map->flags & _DRM_CONTAINS_LOCK) {
- dev->lock.hw_lock = map->handle; /* Pointer to lock */
- }
- break;
-#if defined(CONFIG_AGP) || defined(CONFIG_AGP_MODULE)
- case _DRM_AGP:
- map->offset = map->offset + dev->agp->base;
- break;
-#endif
- default:
- drm_free(map, sizeof(*map), DRM_MEM_MAPS);
- return -EINVAL;
- }
-
- down(&dev->struct_sem);
- if (dev->maplist) {
- ++dev->map_count;
- dev->maplist = drm_realloc(dev->maplist,
- (dev->map_count-1)
- * sizeof(*dev->maplist),
- dev->map_count
- * sizeof(*dev->maplist),
- DRM_MEM_MAPS);
- } else {
- dev->map_count = 1;
- dev->maplist = drm_alloc(dev->map_count*sizeof(*dev->maplist),
- DRM_MEM_MAPS);
- }
- dev->maplist[dev->map_count-1] = map;
- up(&dev->struct_sem);
-
- if (copy_to_user((drm_map_t *)arg, map, sizeof(*map)))
- return -EFAULT;
- if (map->type != _DRM_SHM) {
- if (copy_to_user(&((drm_map_t *)arg)->handle,
- &map->offset,
- sizeof(map->offset)))
- return -EFAULT;
- }
- return 0;
-}
-
-int drm_addbufs(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;
-
- if (copy_from_user(&request,
- (drm_buf_desc_t *)arg,
- sizeof(request)))
- return -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 */
- }
-
- if(count < 0 || count > 4096)
- {
- up(&dev->struct_sem);
- return -EINVAL;
- }
-
- 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;
-
- if (copy_to_user((drm_buf_desc_t *)arg,
- &request,
- sizeof(request)))
- return -EFAULT;
-
- atomic_dec(&dev->buf_alloc);
- return 0;
-}
-
-int drm_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);
-
- if (copy_from_user(&request,
- (drm_buf_info_t *)arg,
- sizeof(request)))
- return -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) {
- if (copy_to_user(&request.list[count].count,
- &dma->bufs[i].buf_count,
- sizeof(dma->bufs[0]
- .buf_count)) ||
- copy_to_user(&request.list[count].size,
- &dma->bufs[i].buf_size,
- sizeof(dma->bufs[0].buf_size)) ||
- copy_to_user(&request.list[count].low_mark,
- &dma->bufs[i]
- .freelist.low_mark,
- sizeof(dma->bufs[0]
- .freelist.low_mark)) ||
- copy_to_user(&request.list[count]
- .high_mark,
- &dma->bufs[i]
- .freelist.high_mark,
- sizeof(dma->bufs[0]
- .freelist.high_mark)))
- return -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;
-
- if (copy_to_user((drm_buf_info_t *)arg,
- &request,
- sizeof(request)))
- return -EFAULT;
-
- return 0;
-}
-
-int drm_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;
-
- if (copy_from_user(&request,
- (drm_buf_desc_t *)arg,
- sizeof(request)))
- return -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 drm_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;
-
- if (copy_from_user(&request,
- (drm_buf_free_t *)arg,
- sizeof(request)))
- return -EFAULT;
-
- DRM_DEBUG("%d\n", request.count);
- for (i = 0; i < request.count; i++) {
- if (copy_from_user(&idx,
- &request.list[i],
- sizeof(idx)))
- return -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 drm_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);
-
- if (copy_from_user(&request,
- (drm_buf_map_t *)arg,
- sizeof(request)))
- return -EFAULT;
-
- if (request.count >= dma->buf_count) {
- down_write(¤t->mm->mmap_sem);
- virtual = do_mmap(filp, 0, dma->byte_count,
- PROT_READ|PROT_WRITE, MAP_SHARED, 0);
- up_write(¤t->mm->mmap_sem);
- 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);
-
- if (copy_to_user((drm_buf_map_t *)arg,
- &request,
- sizeof(request)))
- return -EFAULT;
-
- return retcode;
-}
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TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)