drm/sis/sis_mm.c

0001 /**************************************************************************
0002  *
0003  * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND., USA.
0004  * All Rights Reserved.
0005  *
0006  * Permission is hereby granted, free of charge, to any person obtaining a
0007  * copy of this software and associated documentation files (the
0008  * "Software"), to deal in the Software without restriction, including
0009  * without limitation the rights to use, copy, modify, merge, publish,
0010  * distribute, sub license, and/or sell copies of the Software, and to
0011  * permit persons to whom the Software is furnished to do so, subject to
0012  * the following conditions:
0013  *
0014  * The above copyright notice and this permission notice (including the
0015  * next paragraph) shall be included in all copies or substantial portions
0016  * of the Software.
0017  *
0018  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0019  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0020  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
0021  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
0022  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
0023  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
0024  * USE OR OTHER DEALINGS IN THE SOFTWARE.
0025  *
0026  *
0027  **************************************************************************/
0028
0029 /*
0030  * Authors:
0031  *    Thomas Hellström <thomas-at-tungstengraphics-dot-com>
0032  */
0033
0034 #include <video/sisfb.h>
0035
0036 #include <drm/drm_device.h>
0037 #include <drm/drm_file.h>
0038 #include <drm/sis_drm.h>
0039
0040 #include "sis_drv.h"
0041
0042
0043 #define VIDEO_TYPE 0
0044 #define AGP_TYPE 1
0045
0046
0047 struct sis_memblock {
0048     struct drm_mm_node mm_node;
0049     struct sis_memreq req;
0050     struct list_head owner_list;
0051 };
0052
0053 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
0054 /* fb management via fb device */
0055
0056 #define SIS_MM_ALIGN_SHIFT 0
0057 #define SIS_MM_ALIGN_MASK 0
0058
0059 #else /* CONFIG_FB_SIS[_MODULE] */
0060
0061 #define SIS_MM_ALIGN_SHIFT 4
0062 #define SIS_MM_ALIGN_MASK ((1 << SIS_MM_ALIGN_SHIFT) - 1)
0063
0064 #endif /* CONFIG_FB_SIS[_MODULE] */
0065
0066 static int sis_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
0067 {
0068     drm_sis_private_t *dev_priv = dev->dev_private;
0069     drm_sis_fb_t *fb = data;
0070
0071     mutex_lock(&dev->struct_mutex);
0072     /* Unconditionally init the drm_mm, even though we don't use it when the
0073      * fb sis driver is available - make cleanup easier. */
0074     drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> SIS_MM_ALIGN_SHIFT);
0075
0076     dev_priv->vram_initialized = 1;
0077     dev_priv->vram_offset = fb->offset;
0078
0079     mutex_unlock(&dev->struct_mutex);
0080     DRM_DEBUG("offset = %lu, size = %lu\n", fb->offset, fb->size);
0081
0082     return 0;
0083 }
0084
0085 static int sis_drm_alloc(struct drm_device *dev, struct drm_file *file,
0086              void *data, int pool)
0087 {
0088     drm_sis_private_t *dev_priv = dev->dev_private;
0089     drm_sis_mem_t *mem = data;
0090     int retval = 0, user_key;
0091     struct sis_memblock *item;
0092     struct sis_file_private *file_priv = file->driver_priv;
0093     unsigned long offset;
0094
0095     mutex_lock(&dev->struct_mutex);
0096
0097     if (0 == ((pool == 0) ? dev_priv->vram_initialized :
0098               dev_priv->agp_initialized)) {
0099         DRM_ERROR
0100             ("Attempt to allocate from uninitialized memory manager.\n");
0101         mutex_unlock(&dev->struct_mutex);
0102         return -EINVAL;
0103     }
0104
0105     item = kzalloc(sizeof(*item), GFP_KERNEL);
0106     if (!item) {
0107         retval = -ENOMEM;
0108         goto fail_alloc;
0109     }
0110
0111     mem->size = (mem->size + SIS_MM_ALIGN_MASK) >> SIS_MM_ALIGN_SHIFT;
0112     if (pool == AGP_TYPE) {
0113         retval = drm_mm_insert_node(&dev_priv->agp_mm,
0114                         &item->mm_node,
0115                         mem->size);
0116         offset = item->mm_node.start;
0117     } else {
0118 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
0119         item->req.size = mem->size;
0120         sis_malloc(&item->req);
0121         if (item->req.size == 0)
0122             retval = -ENOMEM;
0123         offset = item->req.offset;
0124 #else
0125         retval = drm_mm_insert_node(&dev_priv->vram_mm,
0126                         &item->mm_node,
0127                         mem->size);
0128         offset = item->mm_node.start;
0129 #endif
0130     }
0131     if (retval)
0132         goto fail_alloc;
0133
0134     retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
0135     if (retval < 0)
0136         goto fail_idr;
0137     user_key = retval;
0138
0139     list_add(&item->owner_list, &file_priv->obj_list);
0140     mutex_unlock(&dev->struct_mutex);
0141
0142     mem->offset = ((pool == 0) ?
0143               dev_priv->vram_offset : dev_priv->agp_offset) +
0144         (offset << SIS_MM_ALIGN_SHIFT);
0145     mem->free = user_key;
0146     mem->size = mem->size << SIS_MM_ALIGN_SHIFT;
0147
0148     return 0;
0149
0150 fail_idr:
0151     drm_mm_remove_node(&item->mm_node);
0152 fail_alloc:
0153     kfree(item);
0154     mutex_unlock(&dev->struct_mutex);
0155
0156     mem->offset = 0;
0157     mem->size = 0;
0158     mem->free = 0;
0159
0160     DRM_DEBUG("alloc %d, size = %ld, offset = %ld\n", pool, mem->size,
0161           mem->offset);
0162
0163     return retval;
0164 }
0165
0166 static int sis_drm_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
0167 {
0168     drm_sis_private_t *dev_priv = dev->dev_private;
0169     drm_sis_mem_t *mem = data;
0170     struct sis_memblock *obj;
0171
0172     mutex_lock(&dev->struct_mutex);
0173     obj = idr_find(&dev_priv->object_idr, mem->free);
0174     if (obj == NULL) {
0175         mutex_unlock(&dev->struct_mutex);
0176         return -EINVAL;
0177     }
0178
0179     idr_remove(&dev_priv->object_idr, mem->free);
0180     list_del(&obj->owner_list);
0181     if (drm_mm_node_allocated(&obj->mm_node))
0182         drm_mm_remove_node(&obj->mm_node);
0183 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
0184     else
0185         sis_free(obj->req.offset);
0186 #endif
0187     kfree(obj);
0188     mutex_unlock(&dev->struct_mutex);
0189     DRM_DEBUG("free = 0x%lx\n", mem->free);
0190
0191     return 0;
0192 }
0193
0194 static int sis_fb_alloc(struct drm_device *dev, void *data,
0195             struct drm_file *file_priv)
0196 {
0197     return sis_drm_alloc(dev, file_priv, data, VIDEO_TYPE);
0198 }
0199
0200 static int sis_ioctl_agp_init(struct drm_device *dev, void *data,
0201                   struct drm_file *file_priv)
0202 {
0203     drm_sis_private_t *dev_priv = dev->dev_private;
0204     drm_sis_agp_t *agp = data;
0205     dev_priv = dev->dev_private;
0206
0207     mutex_lock(&dev->struct_mutex);
0208     drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> SIS_MM_ALIGN_SHIFT);
0209
0210     dev_priv->agp_initialized = 1;
0211     dev_priv->agp_offset = agp->offset;
0212     mutex_unlock(&dev->struct_mutex);
0213
0214     DRM_DEBUG("offset = %lu, size = %lu\n", agp->offset, agp->size);
0215     return 0;
0216 }
0217
0218 static int sis_ioctl_agp_alloc(struct drm_device *dev, void *data,
0219                    struct drm_file *file_priv)
0220 {
0221
0222     return sis_drm_alloc(dev, file_priv, data, AGP_TYPE);
0223 }
0224
0225 static drm_local_map_t *sis_reg_init(struct drm_device *dev)
0226 {
0227     struct drm_map_list *entry;
0228     drm_local_map_t *map;
0229
0230     list_for_each_entry(entry, &dev->maplist, head) {
0231         map = entry->map;
0232         if (!map)
0233             continue;
0234         if (map->type == _DRM_REGISTERS)
0235             return map;
0236     }
0237     return NULL;
0238 }
0239
0240 int sis_idle(struct drm_device *dev)
0241 {
0242     drm_sis_private_t *dev_priv = dev->dev_private;
0243     uint32_t idle_reg;
0244     unsigned long end;
0245     int i;
0246
0247     if (dev_priv->idle_fault)
0248         return 0;
0249
0250     if (dev_priv->mmio == NULL) {
0251         dev_priv->mmio = sis_reg_init(dev);
0252         if (dev_priv->mmio == NULL) {
0253             DRM_ERROR("Could not find register map.\n");
0254             return 0;
0255         }
0256     }
0257
0258     /*
0259      * Implement a device switch here if needed
0260      */
0261
0262     if (dev_priv->chipset != SIS_CHIP_315)
0263         return 0;
0264
0265     /*
0266      * Timeout after 3 seconds. We cannot use DRM_WAIT_ON here
0267      * because its polling frequency is too low.
0268      */
0269
0270     end = jiffies + (HZ * 3);
0271
0272     for (i = 0; i < 4; ++i) {
0273         do {
0274             idle_reg = SIS_READ(0x85cc);
0275         } while (!time_after_eq(jiffies, end) &&
0276               ((idle_reg & 0x80000000) != 0x80000000));
0277     }
0278
0279     if (time_after_eq(jiffies, end)) {
0280         DRM_ERROR("Graphics engine idle timeout. "
0281               "Disabling idle check\n");
0282         dev_priv->idle_fault = 1;
0283     }
0284
0285     /*
0286      * The caller never sees an error code. It gets trapped
0287      * in libdrm.
0288      */
0289
0290     return 0;
0291 }
0292
0293
0294 void sis_lastclose(struct drm_device *dev)
0295 {
0296     drm_sis_private_t *dev_priv = dev->dev_private;
0297
0298     if (!dev_priv)
0299         return;
0300
0301     mutex_lock(&dev->struct_mutex);
0302     if (dev_priv->vram_initialized) {
0303         drm_mm_takedown(&dev_priv->vram_mm);
0304         dev_priv->vram_initialized = 0;
0305     }
0306     if (dev_priv->agp_initialized) {
0307         drm_mm_takedown(&dev_priv->agp_mm);
0308         dev_priv->agp_initialized = 0;
0309     }
0310     dev_priv->mmio = NULL;
0311     mutex_unlock(&dev->struct_mutex);
0312 }
0313
0314 void sis_reclaim_buffers_locked(struct drm_device *dev,
0315                 struct drm_file *file)
0316 {
0317     struct sis_file_private *file_priv = file->driver_priv;
0318     struct sis_memblock *entry, *next;
0319
0320     if (!(dev->master && file->master->lock.hw_lock))
0321         return;
0322
0323     drm_legacy_idlelock_take(&file->master->lock);
0324
0325     mutex_lock(&dev->struct_mutex);
0326     if (list_empty(&file_priv->obj_list)) {
0327         mutex_unlock(&dev->struct_mutex);
0328         drm_legacy_idlelock_release(&file->master->lock);
0329
0330         return;
0331     }
0332
0333     sis_idle(dev);
0334
0335
0336     list_for_each_entry_safe(entry, next, &file_priv->obj_list,
0337                  owner_list) {
0338         list_del(&entry->owner_list);
0339         if (drm_mm_node_allocated(&entry->mm_node))
0340             drm_mm_remove_node(&entry->mm_node);
0341 #if defined(CONFIG_FB_SIS) || defined(CONFIG_FB_SIS_MODULE)
0342         else
0343             sis_free(entry->req.offset);
0344 #endif
0345         kfree(entry);
0346     }
0347     mutex_unlock(&dev->struct_mutex);
0348
0349     drm_legacy_idlelock_release(&file->master->lock);
0350
0351     return;
0352 }
0353
0354 const struct drm_ioctl_desc sis_ioctls[] = {
0355     DRM_IOCTL_DEF_DRV(SIS_FB_ALLOC, sis_fb_alloc, DRM_AUTH),
0356     DRM_IOCTL_DEF_DRV(SIS_FB_FREE, sis_drm_free, DRM_AUTH),
0357     DRM_IOCTL_DEF_DRV(SIS_AGP_INIT, sis_ioctl_agp_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
0358     DRM_IOCTL_DEF_DRV(SIS_AGP_ALLOC, sis_ioctl_agp_alloc, DRM_AUTH),
0359     DRM_IOCTL_DEF_DRV(SIS_AGP_FREE, sis_drm_free, DRM_AUTH),
0360     DRM_IOCTL_DEF_DRV(SIS_FB_INIT, sis_fb_init, DRM_AUTH | DRM_MASTER | DRM_ROOT_ONLY),
0361 };
0362
0363 int sis_max_ioctl = ARRAY_SIZE(sis_ioctls);