1/*
  2 * Copyright 2006 Tungsten Graphics Inc., Bismarck, ND., USA.
  3 * All rights reserved.
  4 *
  5 * Permission is hereby granted, free of charge, to any person obtaining a
  6 * copy of this software and associated documentation files (the "Software"),
  7 * to deal in the Software without restriction, including without limitation
  8 * the rights to use, copy, modify, merge, publish, distribute, sub license,
  9 * and/or sell copies of the Software, and to permit persons to whom the
 10 * Software is furnished to do so, subject to the following conditions:
 11 *
 12 * The above copyright notice and this permission notice (including the
 13 * next paragraph) shall be included in all copies or substantial portions
 14 * of the Software.
 15 *
 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 19 * THE AUTHORS OR COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 22 * DEALINGS IN THE SOFTWARE.
 23 */
 24/*
 25 * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
 26 */
 27
 28#include <drm/drmP.h>
 29#include <drm/via_drm.h>
 30#include "via_drv.h"
 31
 32#define VIA_MM_ALIGN_SHIFT 4
 33#define VIA_MM_ALIGN_MASK ((1 << VIA_MM_ALIGN_SHIFT) - 1)
 34
 35struct via_memblock {
 36	struct drm_mm_node mm_node;
 37	struct list_head owner_list;
 38};
 39
 40int via_agp_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
 41{
 42	drm_via_agp_t *agp = data;
 43	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
 44
 45	mutex_lock(&dev->struct_mutex);
 46	drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> VIA_MM_ALIGN_SHIFT);
 47
 48	dev_priv->agp_initialized = 1;
 49	dev_priv->agp_offset = agp->offset;
 50	mutex_unlock(&dev->struct_mutex);
 51
 52	DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size);
 53	return 0;
 54}
 55
 56int via_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
 57{
 58	drm_via_fb_t *fb = data;
 59	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
 60
 61	mutex_lock(&dev->struct_mutex);
 62	drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> VIA_MM_ALIGN_SHIFT);
 63
 64	dev_priv->vram_initialized = 1;
 65	dev_priv->vram_offset = fb->offset;
 66
 67	mutex_unlock(&dev->struct_mutex);
 68	DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size);
 69
 70	return 0;
 71
 72}
 73
 74int via_final_context(struct drm_device *dev, int context)
 75{
 76	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
 77
 78	via_release_futex(dev_priv, context);
 79
 80	/* Linux specific until context tracking code gets ported to BSD */
 81	/* Last context, perform cleanup */
 82	if (list_is_singular(&dev->ctxlist)) {
 83		DRM_DEBUG("Last Context\n");
 84		drm_irq_uninstall(dev);
 85		via_cleanup_futex(dev_priv);
 86		via_do_cleanup_map(dev);
 87	}
 88	return 1;
 89}
 90
 91void via_lastclose(struct drm_device *dev)
 92{
 93	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
 94
 95	if (!dev_priv)
 96		return;
 97
 98	mutex_lock(&dev->struct_mutex);
 99	if (dev_priv->vram_initialized) {
100		drm_mm_takedown(&dev_priv->vram_mm);
101		dev_priv->vram_initialized = 0;
102	}
103	if (dev_priv->agp_initialized) {
104		drm_mm_takedown(&dev_priv->agp_mm);
105		dev_priv->agp_initialized = 0;
106	}
107	mutex_unlock(&dev->struct_mutex);
108}
109
110int via_mem_alloc(struct drm_device *dev, void *data,
111		  struct drm_file *file)
112{
113	drm_via_mem_t *mem = data;
114	int retval = 0, user_key;
115	struct via_memblock *item;
116	drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
117	struct via_file_private *file_priv = file->driver_priv;
118	unsigned long tmpSize;
119
120	if (mem->type > VIA_MEM_AGP) {
121		DRM_ERROR("Unknown memory type allocation\n");
122		return -EINVAL;
123	}
124	mutex_lock(&dev->struct_mutex);
125	if (0 == ((mem->type == VIA_MEM_VIDEO) ? dev_priv->vram_initialized :
126		      dev_priv->agp_initialized)) {
127		DRM_ERROR
128		    ("Attempt to allocate from uninitialized memory manager.\n");
129		mutex_unlock(&dev->struct_mutex);
130		return -EINVAL;
131	}
132
133	item = kzalloc(sizeof(*item), GFP_KERNEL);
134	if (!item) {
135		retval = -ENOMEM;
136		goto fail_alloc;
137	}
138
139	tmpSize = (mem->size + VIA_MM_ALIGN_MASK) >> VIA_MM_ALIGN_SHIFT;
140	if (mem->type == VIA_MEM_AGP)
141		retval = drm_mm_insert_node(&dev_priv->agp_mm,
142					    &item->mm_node,
143					    tmpSize, 0, DRM_MM_SEARCH_DEFAULT);
144	else
145		retval = drm_mm_insert_node(&dev_priv->vram_mm,
146					    &item->mm_node,
147					    tmpSize, 0, DRM_MM_SEARCH_DEFAULT);
148	if (retval)
149		goto fail_alloc;
150
151	retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
152	if (retval < 0)
153		goto fail_idr;
154	user_key = retval;
155
156	list_add(&item->owner_list, &file_priv->obj_list);
157	mutex_unlock(&dev->struct_mutex);
158
159	mem->offset = ((mem->type == VIA_MEM_VIDEO) ?
160		      dev_priv->vram_offset : dev_priv->agp_offset) +
161	    ((item->mm_node.start) << VIA_MM_ALIGN_SHIFT);
162	mem->index = user_key;
163
164	return 0;
165
166fail_idr:
167	drm_mm_remove_node(&item->mm_node);
168fail_alloc:
169	kfree(item);
170	mutex_unlock(&dev->struct_mutex);
171
172	mem->offset = 0;
173	mem->size = 0;
174	mem->index = 0;
175	DRM_DEBUG("Video memory allocation failed\n");
176
177	return retval;
178}
179
180int via_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
181{
182	drm_via_private_t *dev_priv = dev->dev_private;
183	drm_via_mem_t *mem = data;
184	struct via_memblock *obj;
185
186	mutex_lock(&dev->struct_mutex);
187	obj = idr_find(&dev_priv->object_idr, mem->index);
188	if (obj == NULL) {
189		mutex_unlock(&dev->struct_mutex);
190		return -EINVAL;
191	}
192
193	idr_remove(&dev_priv->object_idr, mem->index);
194	list_del(&obj->owner_list);
195	drm_mm_remove_node(&obj->mm_node);
196	kfree(obj);
197	mutex_unlock(&dev->struct_mutex);
198
199	DRM_DEBUG("free = 0x%lx\n", mem->index);
200
201	return 0;
202}
203
204
205void via_reclaim_buffers_locked(struct drm_device *dev,
206				struct drm_file *file)
207{
208	struct via_file_private *file_priv = file->driver_priv;
209	struct via_memblock *entry, *next;
210
211	if (!(file->minor->master && file->master->lock.hw_lock))
212		return;
213
214	drm_legacy_idlelock_take(&file->master->lock);
215
216	mutex_lock(&dev->struct_mutex);
217	if (list_empty(&file_priv->obj_list)) {
218		mutex_unlock(&dev->struct_mutex);
219		drm_legacy_idlelock_release(&file->master->lock);
220
221		return;
222	}
223
224	via_driver_dma_quiescent(dev);
225
226	list_for_each_entry_safe(entry, next, &file_priv->obj_list,
227				 owner_list) {
228		list_del(&entry->owner_list);
229		drm_mm_remove_node(&entry->mm_node);
230		kfree(entry);
231	}
232	mutex_unlock(&dev->struct_mutex);
233
234	drm_legacy_idlelock_release(&file->master->lock);
235
236	return;
237}