363 lines
9.1 KiB
C
363 lines
9.1 KiB
C
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/**************************************************************************
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*
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* Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA.
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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
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the 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 NON-INFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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* USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*
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**************************************************************************/
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/*
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* Authors:
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* Thomas Hellström <thomas-at-tungstengraphics-dot-com>
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*/
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#include <drm/drmP.h>
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#include <drm/sis_drm.h>
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#include "sis_drv.h"
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#include <video/sisfb.h>
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#define VIDEO_TYPE 0
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#define AGP_TYPE 1
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struct sis_memblock {
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struct drm_mm_node mm_node;
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struct sis_memreq req;
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struct list_head owner_list;
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};
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#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
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/* fb management via fb device */
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#define SIS_MM_ALIGN_SHIFT 0
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#define SIS_MM_ALIGN_MASK 0
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#else /* CONFIG_FB_SIS[_MODULE] */
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#define SIS_MM_ALIGN_SHIFT 4
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#define SIS_MM_ALIGN_MASK ((1 << SIS_MM_ALIGN_SHIFT) - 1)
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#endif /* CONFIG_FB_SIS[_MODULE] */
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static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
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{
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drm_sis_private_t *dev_priv = dev->dev_private;
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drm_sis_fb_t *fb = data;
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mutex_lock(&dev->struct_mutex);
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/* Unconditionally init the drm_mm, even though we don't use it when the
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* fb sis driver is available - make cleanup easier. */
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drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> SIS_MM_ALIGN_SHIFT);
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dev_priv->vram_initialized = 1;
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dev_priv->vram_offset = fb->offset;
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mutex_unlock(&dev->struct_mutex);
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DRM_DEBUG("offset = %lu, size = %lu\n", fb->offset, fb->size);
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return 0;
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}
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static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
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void *data, int pool)
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{
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drm_sis_private_t *dev_priv = dev->dev_private;
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drm_sis_mem_t *mem = data;
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int retval = 0, user_key;
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struct sis_memblock *item;
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struct sis_file_private *file_priv = file->driver_priv;
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unsigned long offset;
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mutex_lock(&dev->struct_mutex);
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if (0 == ((pool == 0) ? dev_priv->vram_initialized :
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dev_priv->agp_initialized)) {
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DRM_ERROR
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("Attempt to allocate from uninitialized memory manager.\n");
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mutex_unlock(&dev->struct_mutex);
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return -EINVAL;
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}
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item = kzalloc(sizeof(*item), GFP_KERNEL);
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if (!item) {
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retval = -ENOMEM;
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goto fail_alloc;
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}
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mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
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if (pool == AGP_TYPE) {
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retval = drm_mm_insert_node(&dev_priv->agp_mm,
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&item->mm_node,
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mem->size, 0,
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DRM_MM_SEARCH_DEFAULT);
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offset = item->mm_node.start;
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} else {
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#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
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item->req.size = mem->size;
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sis_malloc(&item->req);
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if (item->req.size == 0)
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retval = -ENOMEM;
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offset = item->req.offset;
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#else
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retval = drm_mm_insert_node(&dev_priv->vram_mm,
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&item->mm_node,
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mem->size, 0,
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DRM_MM_SEARCH_DEFAULT);
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offset = item->mm_node.start;
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#endif
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}
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if (retval)
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goto fail_alloc;
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retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
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if (retval < 0)
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goto fail_idr;
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user_key = retval;
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list_add(&item->owner_list, &file_priv->obj_list);
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mutex_unlock(&dev->struct_mutex);
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mem->offset = ((pool == 0) ?
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dev_priv->vram_offset : dev_priv->agp_offset) +
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(offset << SIS_MM_ALIGN_SHIFT);
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mem->free = user_key;
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mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
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return 0;
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fail_idr:
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drm_mm_remove_node(&item->mm_node);
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fail_alloc:
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kfree(item);
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mutex_unlock(&dev->struct_mutex);
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mem->offset = 0;
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mem->size = 0;
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mem->free = 0;
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DRM_DEBUG("alloc %d, size = %ld, offset = %ld\n", pool, mem->size,
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mem->offset);
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return retval;
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}
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static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
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{
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drm_sis_private_t *dev_priv = dev->dev_private;
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drm_sis_mem_t *mem = data;
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struct sis_memblock *obj;
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mutex_lock(&dev->struct_mutex);
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obj = idr_find(&dev_priv->object_idr, mem->free);
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if (obj == NULL) {
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mutex_unlock(&dev->struct_mutex);
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return -EINVAL;
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}
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idr_remove(&dev_priv->object_idr, mem->free);
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list_del(&obj->owner_list);
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if (drm_mm_node_allocated(&obj->mm_node))
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drm_mm_remove_node(&obj->mm_node);
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#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
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else
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sis_free(obj->req.offset);
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#endif
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kfree(obj);
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mutex_unlock(&dev->struct_mutex);
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DRM_DEBUG("free = 0x%lx\n", mem->free);
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return 0;
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}
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static int sis_fb_alloc(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
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}
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static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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drm_sis_private_t *dev_priv = dev->dev_private;
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drm_sis_agp_t *agp = data;
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dev_priv = dev->dev_private;
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mutex_lock(&dev->struct_mutex);
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drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT);
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dev_priv->agp_initialized = 1;
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dev_priv->agp_offset = agp->offset;
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mutex_unlock(&dev->struct_mutex);
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DRM_DEBUG("offset = %lu, size = %lu\n", agp->offset, agp->size);
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return 0;
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}
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static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
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}
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static drm_local_map_t *sis_reg_init(struct drm_device *dev)
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{
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struct drm_map_list *entry;
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drm_local_map_t *map;
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list_for_each_entry(entry, &dev->maplist, head) {
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map = entry->map;
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if (!map)
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continue;
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if (map->type == _DRM_REGISTERS)
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return map;
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}
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return NULL;
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}
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int sis_idle(struct drm_device *dev)
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{
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drm_sis_private_t *dev_priv = dev->dev_private;
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uint32_t idle_reg;
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unsigned long end;
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int i;
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if (dev_priv->idle_fault)
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return 0;
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if (dev_priv->mmio == NULL) {
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dev_priv->mmio = sis_reg_init(dev);
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if (dev_priv->mmio == NULL) {
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DRM_ERROR("Could not find register map.\n");
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return 0;
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}
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}
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/*
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* Implement a device switch here if needed
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*/
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if (dev_priv->chipset != SIS_CHIP_315)
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return 0;
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/*
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* Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
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* because its polling frequency is too low.
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*/
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end = jiffies + (HZ * 3);
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for (i = 0; i < 4; ++i) {
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do {
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idle_reg = SIS_READ(0x85cc);
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} while (!time_after_eq(jiffies, end) &&
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((idle_reg & 0x80000000) != 0x80000000));
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}
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if (time_after_eq(jiffies, end)) {
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DRM_ERROR("Graphics engine idle timeout. "
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"Disabling idle check\n");
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dev_priv->idle_fault = 1;
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}
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/*
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* The caller never sees an error code. It gets trapped
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* in libdrm.
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*/
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return 0;
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}
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void sis_lastclose(struct drm_device *dev)
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{
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drm_sis_private_t *dev_priv = dev->dev_private;
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if (!dev_priv)
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return;
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mutex_lock(&dev->struct_mutex);
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if (dev_priv->vram_initialized) {
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drm_mm_takedown(&dev_priv->vram_mm);
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dev_priv->vram_initialized = 0;
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}
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if (dev_priv->agp_initialized) {
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drm_mm_takedown(&dev_priv->agp_mm);
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dev_priv->agp_initialized = 0;
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}
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dev_priv->mmio = NULL;
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mutex_unlock(&dev->struct_mutex);
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}
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void sis_reclaim_buffers_locked(struct drm_device *dev,
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struct drm_file *file)
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{
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struct sis_file_private *file_priv = file->driver_priv;
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struct sis_memblock *entry, *next;
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if (!(dev->master && file->master->lock.hw_lock))
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return;
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drm_legacy_idlelock_take(&file->master->lock);
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mutex_lock(&dev->struct_mutex);
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if (list_empty(&file_priv->obj_list)) {
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mutex_unlock(&dev->struct_mutex);
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drm_legacy_idlelock_release(&file->master->lock);
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return;
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}
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sis_idle(dev);
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list_for_each_entry_safe(entry, next, &file_priv->obj_list,
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owner_list) {
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list_del(&entry->owner_list);
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if (drm_mm_node_allocated(&entry->mm_node))
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drm_mm_remove_node(&entry->mm_node);
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#if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
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else
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sis_free(entry->req.offset);
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#endif
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kfree(entry);
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}
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mutex_unlock(&dev->struct_mutex);
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drm_legacy_idlelock_release(&file->master->lock);
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return;
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}
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const struct drm_ioctl_desc sis_ioctls[] = {
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DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
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DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH),
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DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
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DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
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DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
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DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
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};
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int sis_max_ioctl = ARRAY_SIZE(sis_ioctls);
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