mirror of
https://gitlab.freedesktop.org/mesa/drm.git
synced 2025-12-20 16:20:11 +01:00
9fb6986e83
anything, and took up valuable KVA. While I'm in the area, clean up BSD
MTRR stuff some more.
Suggested by: jonsmirl
1305 lines
34 KiB
C
1305 lines
34 KiB
C
/**
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* \file drm_bufs.h
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* Generic buffer template
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*
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* \author Rickard E. (Rik) Faith <faith@valinux.com>
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* \author Gareth Hughes <gareth@valinux.com>
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*/
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/*
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* Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
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*
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* Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
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* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#define __NO_VERSION__
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#include <linux/vmalloc.h>
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#include "drmP.h"
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#ifndef __HAVE_PCI_DMA
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#define __HAVE_PCI_DMA 0
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#endif
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#ifndef __HAVE_SG
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#define __HAVE_SG 0
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#endif
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#ifndef DRIVER_BUF_PRIV_T
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#define DRIVER_BUF_PRIV_T u32
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#endif
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#ifndef DRIVER_AGP_BUFFERS_MAP
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#if __HAVE_AGP && __HAVE_DMA
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#error "You must define DRIVER_AGP_BUFFERS_MAP()"
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#else
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#define DRIVER_AGP_BUFFERS_MAP( dev ) NULL
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#endif
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#endif
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/**
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* Compute size order. Returns the exponent of the smaller power of two which
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* is greater or equal to given number.
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*
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* \param size size.
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* \return order.
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*
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* \todo Can be made faster.
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*/
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int DRM(order)( unsigned long size )
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{
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int order;
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unsigned long tmp;
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for ( order = 0, tmp = size ; tmp >>= 1 ; ++order );
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if ( size & ~(1 << order) )
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++order;
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return order;
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}
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/**
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* Ioctl to specify a range of memory that is available for mapping by a non-root process.
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*
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* \param inode device inode.
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* \param filp file pointer.
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* \param cmd command.
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* \param arg pointer to a drm_map structure.
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* \return zero on success or a negative value on error.
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*
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* Adjusts the memory offset to its absolute value according to the mapping
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* type. Adds the map to the map list drm_device::maplist. Adds MTRR's where
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* applicable and if supported by the kernel.
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*/
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int DRM(addmap)( struct inode *inode, struct file *filp,
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unsigned int cmd, unsigned long arg )
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->dev;
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drm_map_t *map;
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drm_map_list_t *list;
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if ( !(filp->f_mode & 3) ) return -EACCES; /* Require read/write */
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map = DRM(alloc)( sizeof(*map), DRM_MEM_MAPS );
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if ( !map )
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return -ENOMEM;
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if ( copy_from_user( map, (drm_map_t *)arg, sizeof(*map) ) ) {
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DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
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return -EFAULT;
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}
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/* Only allow shared memory to be removable since we only keep enough
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* book keeping information about shared memory to allow for removal
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* when processes fork.
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*/
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if ( (map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM ) {
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DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
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return -EINVAL;
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}
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DRM_DEBUG( "offset = 0x%08lx, size = 0x%08lx, type = %d\n",
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map->offset, map->size, map->type );
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if ( (map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK)) ) {
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DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
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return -EINVAL;
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}
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map->mtrr = -1;
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map->handle = 0;
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switch ( map->type ) {
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case _DRM_REGISTERS:
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case _DRM_FRAME_BUFFER:
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#if !defined(__sparc__) && !defined(__alpha__)
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if ( map->offset + map->size < map->offset ||
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map->offset < virt_to_phys(high_memory) ) {
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DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
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return -EINVAL;
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}
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#endif
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#ifdef __alpha__
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map->offset += dev->hose->mem_space->start;
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#endif
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#if __REALLY_HAVE_MTRR
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if ( map->type == _DRM_FRAME_BUFFER ||
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(map->flags & _DRM_WRITE_COMBINING) ) {
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map->mtrr = mtrr_add( map->offset, map->size,
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MTRR_TYPE_WRCOMB, 1 );
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}
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#endif
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if (map->type == _DRM_REGISTERS)
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map->handle = DRM(ioremap)( map->offset, map->size,
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dev );
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break;
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case _DRM_SHM:
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map->handle = vmalloc_32(map->size);
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DRM_DEBUG( "%lu %d %p\n",
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map->size, DRM(order)( map->size ), map->handle );
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if ( !map->handle ) {
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DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
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return -ENOMEM;
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}
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map->offset = (unsigned long)map->handle;
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if ( map->flags & _DRM_CONTAINS_LOCK ) {
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/* Prevent a 2nd X Server from creating a 2nd lock */
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if (dev->lock.hw_lock != NULL) {
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vfree( map->handle );
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DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
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return -EBUSY;
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}
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dev->sigdata.lock =
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dev->lock.hw_lock = map->handle; /* Pointer to lock */
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}
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break;
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#if __REALLY_HAVE_AGP
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case _DRM_AGP:
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#ifdef __alpha__
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map->offset += dev->hose->mem_space->start;
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#endif
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map->offset += dev->agp->base;
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map->mtrr = dev->agp->agp_mtrr; /* for getmap */
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break;
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#endif
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case _DRM_SCATTER_GATHER:
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if (!dev->sg) {
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DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
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return -EINVAL;
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}
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map->offset += dev->sg->handle;
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break;
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default:
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DRM(free)( map, sizeof(*map), DRM_MEM_MAPS );
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return -EINVAL;
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}
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list = DRM(alloc)(sizeof(*list), DRM_MEM_MAPS);
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if(!list) {
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DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
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return -EINVAL;
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}
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memset(list, 0, sizeof(*list));
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list->map = map;
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down(&dev->struct_sem);
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list_add(&list->head, &dev->maplist->head);
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up(&dev->struct_sem);
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if ( copy_to_user( (drm_map_t *)arg, map, sizeof(*map) ) )
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return -EFAULT;
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if ( map->type != _DRM_SHM ) {
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if ( copy_to_user( &((drm_map_t *)arg)->handle,
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&map->offset,
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sizeof(map->offset) ) )
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return -EFAULT;
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}
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return 0;
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}
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/**
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* Remove a map private from list and deallocate resources if the mapping
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* isn't in use.
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*
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* \param inode device inode.
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* \param filp file pointer.
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* \param cmd command.
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* \param arg pointer to a drm_map_t structure.
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* \return zero on success or a negative value on error.
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*
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* Searches the map on drm_device::maplist, removes it from the list, see if
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* its being used, and free any associate resource (such as MTRR's) if it's not
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* being on use.
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*
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* \sa addmap().
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*/
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int DRM(rmmap)(struct inode *inode, struct file *filp,
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unsigned int cmd, unsigned long arg)
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->dev;
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struct list_head *list;
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drm_map_list_t *r_list = NULL;
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drm_vma_entry_t *pt, *prev;
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drm_map_t *map;
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drm_map_t request;
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int found_maps = 0;
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if (copy_from_user(&request, (drm_map_t *)arg,
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sizeof(request))) {
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return -EFAULT;
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}
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down(&dev->struct_sem);
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list = &dev->maplist->head;
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list_for_each(list, &dev->maplist->head) {
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r_list = list_entry(list, drm_map_list_t, head);
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if(r_list->map &&
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r_list->map->handle == request.handle &&
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r_list->map->flags & _DRM_REMOVABLE) break;
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}
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/* List has wrapped around to the head pointer, or its empty we didn't
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* find anything.
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*/
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if(list == (&dev->maplist->head)) {
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up(&dev->struct_sem);
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return -EINVAL;
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}
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map = r_list->map;
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list_del(list);
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DRM(free)(list, sizeof(*list), DRM_MEM_MAPS);
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for (pt = dev->vmalist, prev = NULL; pt; prev = pt, pt = pt->next) {
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if (pt->vma->vm_private_data == map) found_maps++;
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}
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if(!found_maps) {
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switch (map->type) {
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case _DRM_REGISTERS:
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case _DRM_FRAME_BUFFER:
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#if __REALLY_HAVE_MTRR
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if (map->mtrr >= 0) {
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int retcode;
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retcode = mtrr_del(map->mtrr,
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map->offset,
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map->size);
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DRM_DEBUG("mtrr_del = %d\n", retcode);
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}
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#endif
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DRM(ioremapfree)(map->handle, map->size, dev);
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break;
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case _DRM_SHM:
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vfree(map->handle);
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break;
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case _DRM_AGP:
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case _DRM_SCATTER_GATHER:
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break;
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}
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DRM(free)(map, sizeof(*map), DRM_MEM_MAPS);
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}
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up(&dev->struct_sem);
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return 0;
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}
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#if __HAVE_DMA
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/**
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* Cleanup after an error on one of the addbufs() functions.
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*
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* \param entry buffer entry where the error occurred.
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*
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* Frees any pages and buffers associated with the given entry.
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*/
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static void DRM(cleanup_buf_error)(drm_buf_entry_t *entry)
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{
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int i;
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if (entry->seg_count) {
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for (i = 0; i < entry->seg_count; i++) {
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if (entry->seglist[i]) {
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DRM(free_pages)(entry->seglist[i],
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entry->page_order,
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DRM_MEM_DMA);
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}
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}
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DRM(free)(entry->seglist,
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entry->seg_count *
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sizeof(*entry->seglist),
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DRM_MEM_SEGS);
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entry->seg_count = 0;
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}
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if (entry->buf_count) {
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for (i = 0; i < entry->buf_count; i++) {
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if (entry->buflist[i].dev_private) {
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DRM(free)(entry->buflist[i].dev_private,
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entry->buflist[i].dev_priv_size,
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DRM_MEM_BUFS);
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}
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}
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DRM(free)(entry->buflist,
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entry->buf_count *
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sizeof(*entry->buflist),
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DRM_MEM_BUFS);
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#if __HAVE_DMA_FREELIST
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DRM(freelist_destroy)(&entry->freelist);
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#endif
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entry->buf_count = 0;
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}
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}
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#if __REALLY_HAVE_AGP
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/**
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* Add AGP buffers for DMA transfers (ioctl).
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*
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* \param inode device inode.
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* \param filp file pointer.
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* \param cmd command.
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* \param arg pointer to a drm_buf_desc_t request.
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* \return zero on success or a negative number on failure.
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*
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* After some sanity checks creates a drm_buf structure for each buffer and
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* reallocates the buffer list of the same size order to accommodate the new
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* buffers.
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*/
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int DRM(addbufs_agp)( struct inode *inode, struct file *filp,
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unsigned int cmd, unsigned long arg )
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{
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drm_file_t *priv = filp->private_data;
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drm_device_t *dev = priv->dev;
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drm_device_dma_t *dma = dev->dma;
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drm_buf_desc_t request;
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drm_buf_entry_t *entry;
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drm_buf_t *buf;
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unsigned long offset;
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unsigned long agp_offset;
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int count;
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int order;
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int size;
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int alignment;
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int page_order;
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int total;
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int byte_count;
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int i;
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drm_buf_t **temp_buflist;
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if ( !dma ) return -EINVAL;
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if ( copy_from_user( &request, (drm_buf_desc_t *)arg,
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sizeof(request) ) )
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return -EFAULT;
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count = request.count;
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order = DRM(order)( request.size );
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size = 1 << order;
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alignment = (request.flags & _DRM_PAGE_ALIGN)
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? PAGE_ALIGN(size) : size;
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page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
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total = PAGE_SIZE << page_order;
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byte_count = 0;
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agp_offset = dev->agp->base + request.agp_start;
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DRM_DEBUG( "count: %d\n", count );
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DRM_DEBUG( "order: %d\n", order );
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DRM_DEBUG( "size: %d\n", size );
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DRM_DEBUG( "agp_offset: %lu\n", agp_offset );
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DRM_DEBUG( "alignment: %d\n", alignment );
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DRM_DEBUG( "page_order: %d\n", page_order );
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DRM_DEBUG( "total: %d\n", total );
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if ( order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ) return -EINVAL;
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if ( dev->queue_count ) return -EBUSY; /* Not while in use */
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spin_lock( &dev->count_lock );
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if ( dev->buf_use ) {
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spin_unlock( &dev->count_lock );
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return -EBUSY;
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}
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atomic_inc( &dev->buf_alloc );
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spin_unlock( &dev->count_lock );
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down( &dev->struct_sem );
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entry = &dma->bufs[order];
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if ( entry->buf_count ) {
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up( &dev->struct_sem );
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atomic_dec( &dev->buf_alloc );
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return -ENOMEM; /* May only call once for each order */
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}
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if (count < 0 || count > 4096) {
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up( &dev->struct_sem );
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atomic_dec( &dev->buf_alloc );
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return -EINVAL;
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}
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entry->buflist = DRM(alloc)( count * sizeof(*entry->buflist),
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DRM_MEM_BUFS );
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if ( !entry->buflist ) {
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up( &dev->struct_sem );
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atomic_dec( &dev->buf_alloc );
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return -ENOMEM;
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}
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memset( entry->buflist, 0, count * sizeof(*entry->buflist) );
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entry->buf_size = size;
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entry->page_order = page_order;
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offset = 0;
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while ( entry->buf_count < count ) {
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buf = &entry->buflist[entry->buf_count];
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buf->idx = dma->buf_count + entry->buf_count;
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buf->total = alignment;
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buf->order = order;
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buf->used = 0;
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buf->offset = (dma->byte_count + offset);
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buf->bus_address = agp_offset + offset;
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buf->address = (void *)(agp_offset + offset);
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buf->next = NULL;
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buf->waiting = 0;
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buf->pending = 0;
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init_waitqueue_head( &buf->dma_wait );
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buf->filp = 0;
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buf->dev_priv_size = sizeof(DRIVER_BUF_PRIV_T);
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buf->dev_private = DRM(alloc)( sizeof(DRIVER_BUF_PRIV_T),
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DRM_MEM_BUFS );
|
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if(!buf->dev_private) {
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/* Set count correctly so we free the proper amount. */
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entry->buf_count = count;
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DRM(cleanup_buf_error)(entry);
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up( &dev->struct_sem );
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atomic_dec( &dev->buf_alloc );
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return -ENOMEM;
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}
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memset( buf->dev_private, 0, buf->dev_priv_size );
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DRM_DEBUG( "buffer %d @ %p\n",
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entry->buf_count, buf->address );
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offset += alignment;
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entry->buf_count++;
|
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byte_count += PAGE_SIZE << page_order;
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}
|
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|
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DRM_DEBUG( "byte_count: %d\n", byte_count );
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|
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temp_buflist = DRM(realloc)( dma->buflist,
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dma->buf_count * sizeof(*dma->buflist),
|
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(dma->buf_count + entry->buf_count)
|
|
* sizeof(*dma->buflist),
|
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DRM_MEM_BUFS );
|
|
if(!temp_buflist) {
|
|
/* Free the entry because it isn't valid */
|
|
DRM(cleanup_buf_error)(entry);
|
|
up( &dev->struct_sem );
|
|
atomic_dec( &dev->buf_alloc );
|
|
return -ENOMEM;
|
|
}
|
|
dma->buflist = temp_buflist;
|
|
|
|
for ( i = 0 ; i < entry->buf_count ; i++ ) {
|
|
dma->buflist[i + dma->buf_count] = &entry->buflist[i];
|
|
}
|
|
|
|
dma->buf_count += entry->buf_count;
|
|
dma->byte_count += byte_count;
|
|
|
|
DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count );
|
|
DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count );
|
|
|
|
#if __HAVE_DMA_FREELIST
|
|
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] );
|
|
}
|
|
#endif
|
|
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;
|
|
|
|
dma->flags = _DRM_DMA_USE_AGP;
|
|
|
|
atomic_dec( &dev->buf_alloc );
|
|
return 0;
|
|
}
|
|
#endif /* __REALLY_HAVE_AGP */
|
|
|
|
#if __HAVE_PCI_DMA
|
|
int DRM(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;
|
|
unsigned long *temp_pagelist;
|
|
drm_buf_t **temp_buflist;
|
|
|
|
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 );
|
|
atomic_dec( &dev->buf_alloc );
|
|
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) );
|
|
|
|
/* Keep the original pagelist until we know all the allocations
|
|
* have succeeded
|
|
*/
|
|
temp_pagelist = DRM(alloc)( (dma->page_count + (count << page_order))
|
|
* sizeof(*dma->pagelist),
|
|
DRM_MEM_PAGES );
|
|
if (!temp_pagelist) {
|
|
DRM(free)( entry->buflist,
|
|
count * sizeof(*entry->buflist),
|
|
DRM_MEM_BUFS );
|
|
DRM(free)( entry->seglist,
|
|
count * sizeof(*entry->seglist),
|
|
DRM_MEM_SEGS );
|
|
up( &dev->struct_sem );
|
|
atomic_dec( &dev->buf_alloc );
|
|
return -ENOMEM;
|
|
}
|
|
memcpy(temp_pagelist,
|
|
dma->pagelist,
|
|
dma->page_count * sizeof(*dma->pagelist));
|
|
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 ) {
|
|
page = DRM(alloc_pages)( page_order, DRM_MEM_DMA );
|
|
if ( !page ) {
|
|
/* Set count correctly so we free the proper amount. */
|
|
entry->buf_count = count;
|
|
entry->seg_count = count;
|
|
DRM(cleanup_buf_error)(entry);
|
|
DRM(free)( temp_pagelist,
|
|
(dma->page_count + (count << page_order))
|
|
* sizeof(*dma->pagelist),
|
|
DRM_MEM_PAGES );
|
|
up( &dev->struct_sem );
|
|
atomic_dec( &dev->buf_alloc );
|
|
return -ENOMEM;
|
|
}
|
|
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 );
|
|
temp_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->filp = 0;
|
|
|
|
buf->dev_priv_size = sizeof(DRIVER_BUF_PRIV_T);
|
|
buf->dev_private = DRM(alloc)( sizeof(DRIVER_BUF_PRIV_T),
|
|
DRM_MEM_BUFS );
|
|
if(!buf->dev_private) {
|
|
/* Set count correctly so we free the proper amount. */
|
|
entry->buf_count = count;
|
|
entry->seg_count = count;
|
|
DRM(cleanup_buf_error)(entry);
|
|
DRM(free)( temp_pagelist,
|
|
(dma->page_count + (count << page_order))
|
|
* sizeof(*dma->pagelist),
|
|
DRM_MEM_PAGES );
|
|
up( &dev->struct_sem );
|
|
atomic_dec( &dev->buf_alloc );
|
|
return -ENOMEM;
|
|
}
|
|
memset( buf->dev_private, 0, buf->dev_priv_size );
|
|
|
|
DRM_DEBUG( "buffer %d @ %p\n",
|
|
entry->buf_count, buf->address );
|
|
}
|
|
byte_count += PAGE_SIZE << page_order;
|
|
}
|
|
|
|
temp_buflist = DRM(realloc)( dma->buflist,
|
|
dma->buf_count * sizeof(*dma->buflist),
|
|
(dma->buf_count + entry->buf_count)
|
|
* sizeof(*dma->buflist),
|
|
DRM_MEM_BUFS );
|
|
if (!temp_buflist) {
|
|
/* Free the entry because it isn't valid */
|
|
DRM(cleanup_buf_error)(entry);
|
|
DRM(free)( temp_pagelist,
|
|
(dma->page_count + (count << page_order))
|
|
* sizeof(*dma->pagelist),
|
|
DRM_MEM_PAGES );
|
|
up( &dev->struct_sem );
|
|
atomic_dec( &dev->buf_alloc );
|
|
return -ENOMEM;
|
|
}
|
|
dma->buflist = temp_buflist;
|
|
|
|
for ( i = 0 ; i < entry->buf_count ; i++ ) {
|
|
dma->buflist[i + dma->buf_count] = &entry->buflist[i];
|
|
}
|
|
|
|
/* No allocations failed, so now we can replace the orginal pagelist
|
|
* with the new one.
|
|
*/
|
|
if (dma->page_count) {
|
|
DRM(free)(dma->pagelist,
|
|
dma->page_count * sizeof(*dma->pagelist),
|
|
DRM_MEM_PAGES);
|
|
}
|
|
dma->pagelist = temp_pagelist;
|
|
|
|
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);
|
|
|
|
#if __HAVE_DMA_FREELIST
|
|
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] );
|
|
}
|
|
#endif
|
|
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;
|
|
|
|
}
|
|
#endif /* __HAVE_PCI_DMA */
|
|
|
|
#if __HAVE_SG
|
|
int DRM(addbufs_sg)( 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;
|
|
drm_buf_t **temp_buflist;
|
|
|
|
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;
|
|
|
|
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;
|
|
agp_offset = request.agp_start;
|
|
|
|
DRM_DEBUG( "count: %d\n", count );
|
|
DRM_DEBUG( "order: %d\n", order );
|
|
DRM_DEBUG( "size: %d\n", size );
|
|
DRM_DEBUG( "agp_offset: %lu\n", agp_offset );
|
|
DRM_DEBUG( "alignment: %d\n", alignment );
|
|
DRM_DEBUG( "page_order: %d\n", page_order );
|
|
DRM_DEBUG( "total: %d\n", total );
|
|
|
|
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 */
|
|
}
|
|
|
|
if (count < 0 || count > 4096) {
|
|
up( &dev->struct_sem );
|
|
atomic_dec( &dev->buf_alloc );
|
|
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->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;
|
|
|
|
buf->offset = (dma->byte_count + offset);
|
|
buf->bus_address = agp_offset + offset;
|
|
buf->address = (void *)(agp_offset + offset + dev->sg->handle);
|
|
buf->next = NULL;
|
|
buf->waiting = 0;
|
|
buf->pending = 0;
|
|
init_waitqueue_head( &buf->dma_wait );
|
|
buf->filp = 0;
|
|
|
|
buf->dev_priv_size = sizeof(DRIVER_BUF_PRIV_T);
|
|
buf->dev_private = DRM(alloc)( sizeof(DRIVER_BUF_PRIV_T),
|
|
DRM_MEM_BUFS );
|
|
if(!buf->dev_private) {
|
|
/* Set count correctly so we free the proper amount. */
|
|
entry->buf_count = count;
|
|
DRM(cleanup_buf_error)(entry);
|
|
up( &dev->struct_sem );
|
|
atomic_dec( &dev->buf_alloc );
|
|
return -ENOMEM;
|
|
}
|
|
|
|
memset( buf->dev_private, 0, buf->dev_priv_size );
|
|
|
|
DRM_DEBUG( "buffer %d @ %p\n",
|
|
entry->buf_count, buf->address );
|
|
|
|
offset += alignment;
|
|
entry->buf_count++;
|
|
byte_count += PAGE_SIZE << page_order;
|
|
}
|
|
|
|
DRM_DEBUG( "byte_count: %d\n", byte_count );
|
|
|
|
temp_buflist = DRM(realloc)( dma->buflist,
|
|
dma->buf_count * sizeof(*dma->buflist),
|
|
(dma->buf_count + entry->buf_count)
|
|
* sizeof(*dma->buflist),
|
|
DRM_MEM_BUFS );
|
|
if(!temp_buflist) {
|
|
/* Free the entry because it isn't valid */
|
|
DRM(cleanup_buf_error)(entry);
|
|
up( &dev->struct_sem );
|
|
atomic_dec( &dev->buf_alloc );
|
|
return -ENOMEM;
|
|
}
|
|
dma->buflist = temp_buflist;
|
|
|
|
for ( i = 0 ; i < entry->buf_count ; i++ ) {
|
|
dma->buflist[i + dma->buf_count] = &entry->buflist[i];
|
|
}
|
|
|
|
dma->buf_count += entry->buf_count;
|
|
dma->byte_count += byte_count;
|
|
|
|
DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count );
|
|
DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count );
|
|
|
|
#if __HAVE_DMA_FREELIST
|
|
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] );
|
|
}
|
|
#endif
|
|
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;
|
|
|
|
dma->flags = _DRM_DMA_USE_SG;
|
|
|
|
atomic_dec( &dev->buf_alloc );
|
|
return 0;
|
|
}
|
|
#endif /* __HAVE_SG */
|
|
|
|
/**
|
|
* Add buffers for DMA transfers (ioctl).
|
|
*
|
|
* \param inode device inode.
|
|
* \param filp file pointer.
|
|
* \param cmd command.
|
|
* \param arg pointer to a drm_buf_desc_t request.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* According with the memory type specified in drm_buf_desc::flags and the
|
|
* build options, it dispatches the call either to addbufs_agp(),
|
|
* addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent
|
|
* PCI memory respectively.
|
|
*/
|
|
int DRM(addbufs)( struct inode *inode, struct file *filp,
|
|
unsigned int cmd, unsigned long arg )
|
|
{
|
|
drm_buf_desc_t request;
|
|
|
|
if ( copy_from_user( &request, (drm_buf_desc_t *)arg,
|
|
sizeof(request) ) )
|
|
return -EFAULT;
|
|
|
|
#if __REALLY_HAVE_AGP
|
|
if ( request.flags & _DRM_AGP_BUFFER )
|
|
return DRM(addbufs_agp)( inode, filp, cmd, arg );
|
|
else
|
|
#endif
|
|
#if __HAVE_SG
|
|
if ( request.flags & _DRM_SG_BUFFER )
|
|
return DRM(addbufs_sg)( inode, filp, cmd, arg );
|
|
else
|
|
#endif
|
|
#if __HAVE_PCI_DMA
|
|
return DRM(addbufs_pci)( inode, filp, cmd, arg );
|
|
#else
|
|
return -EINVAL;
|
|
#endif
|
|
}
|
|
|
|
|
|
/**
|
|
* Get information about the buffer mappings.
|
|
*
|
|
* This was originally mean for debugging purposes, or by a sophisticated
|
|
* client library to determine how best to use the available buffers (e.g.,
|
|
* large buffers can be used for image transfer).
|
|
*
|
|
* \param inode device inode.
|
|
* \param filp file pointer.
|
|
* \param cmd command.
|
|
* \param arg pointer to a drm_buf_info structure.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Increments drm_device::buf_use while holding the drm_device::count_lock
|
|
* lock, preventing of allocating more buffers after this call. Information
|
|
* about each requested buffer is then copied into user space.
|
|
*/
|
|
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 ) {
|
|
drm_buf_desc_t *to = &request.list[count];
|
|
drm_buf_entry_t *from = &dma->bufs[i];
|
|
drm_freelist_t *list = &dma->bufs[i].freelist;
|
|
if ( copy_to_user( &to->count,
|
|
&from->buf_count,
|
|
sizeof(from->buf_count) ) ||
|
|
copy_to_user( &to->size,
|
|
&from->buf_size,
|
|
sizeof(from->buf_size) ) ||
|
|
copy_to_user( &to->low_mark,
|
|
&list->low_mark,
|
|
sizeof(list->low_mark) ) ||
|
|
copy_to_user( &to->high_mark,
|
|
&list->high_mark,
|
|
sizeof(list->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;
|
|
}
|
|
|
|
/**
|
|
* Specifies a low and high water mark for buffer allocation
|
|
*
|
|
* \param inode device inode.
|
|
* \param filp file pointer.
|
|
* \param cmd command.
|
|
* \param arg a pointer to a drm_buf_desc structure.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Verifies that the size order is bounded between the admissible orders and
|
|
* updates the respective drm_device_dma::bufs entry low and high water mark.
|
|
*
|
|
* \note This ioctl is deprecated and mostly never used.
|
|
*/
|
|
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;
|
|
}
|
|
|
|
/**
|
|
* Unreserve the buffers in list, previously reserved using drmDMA.
|
|
*
|
|
* \param inode device inode.
|
|
* \param filp file pointer.
|
|
* \param cmd command.
|
|
* \param arg pointer to a drm_buf_free structure.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Calls free_buffer() for each used buffer.
|
|
* This function is primarily used for debugging.
|
|
*/
|
|
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->filp != filp ) {
|
|
DRM_ERROR( "Process %d freeing buffer not owned\n",
|
|
current->pid );
|
|
return -EINVAL;
|
|
}
|
|
DRM(free_buffer)( dev, buf );
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Maps all of the DMA buffers into client-virtual space (ioctl).
|
|
*
|
|
* \param inode device inode.
|
|
* \param filp file pointer.
|
|
* \param cmd command.
|
|
* \param arg pointer to a drm_buf_map structure.
|
|
* \return zero on success or a negative number on failure.
|
|
*
|
|
* Maps the AGP or SG buffer region with do_mmap(), and copies information
|
|
* about each buffer into user space. The PCI buffers are already mapped on the
|
|
* addbufs_pci() call.
|
|
*/
|
|
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;
|
|
|
|
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 ) {
|
|
if ( (__HAVE_AGP && (dma->flags & _DRM_DMA_USE_AGP)) ||
|
|
(__HAVE_SG && (dma->flags & _DRM_DMA_USE_SG)) ) {
|
|
drm_map_t *map = DRIVER_AGP_BUFFERS_MAP( dev );
|
|
|
|
if ( !map ) {
|
|
retcode = -EINVAL;
|
|
goto done;
|
|
}
|
|
|
|
#if LINUX_VERSION_CODE <= 0x020402
|
|
down( ¤t->mm->mmap_sem );
|
|
#else
|
|
down_write( ¤t->mm->mmap_sem );
|
|
#endif
|
|
virtual = do_mmap( filp, 0, map->size,
|
|
PROT_READ | PROT_WRITE,
|
|
MAP_SHARED,
|
|
(unsigned long)map->offset );
|
|
#if LINUX_VERSION_CODE <= 0x020402
|
|
up( ¤t->mm->mmap_sem );
|
|
#else
|
|
up_write( ¤t->mm->mmap_sem );
|
|
#endif
|
|
} else {
|
|
#if LINUX_VERSION_CODE <= 0x020402
|
|
down( ¤t->mm->mmap_sem );
|
|
#else
|
|
down_write( ¤t->mm->mmap_sem );
|
|
#endif
|
|
virtual = do_mmap( filp, 0, dma->byte_count,
|
|
PROT_READ | PROT_WRITE,
|
|
MAP_SHARED, 0 );
|
|
#if LINUX_VERSION_CODE <= 0x020402
|
|
up( ¤t->mm->mmap_sem );
|
|
#else
|
|
up_write( ¤t->mm->mmap_sem );
|
|
#endif
|
|
}
|
|
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;
|
|
}
|
|
|
|
#endif /* __HAVE_DMA */
|