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via_mm.c

/*
 * Copyright 2006 Tungsten Graphics Inc., Bismarck, ND., USA.
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sub license,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
/*
 * Authors: Thomas Hellström <thomas-at-tungstengraphics-dot-com>
 */

#include "drmP.h"
#include "via_drm.h"
#include "via_drv.h"
#include "drm_sman.h"

#define VIA_MM_ALIGN_SHIFT 4
#define VIA_MM_ALIGN_MASK ( (1 << VIA_MM_ALIGN_SHIFT) - 1)

int via_agp_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
      drm_via_agp_t *agp = data;
      drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
      int ret;

      mutex_lock(&dev->struct_mutex);
      ret = drm_sman_set_range(&dev_priv->sman, VIA_MEM_AGP, 0,
                         agp->size >> VIA_MM_ALIGN_SHIFT);

      if (ret) {
            DRM_ERROR("AGP memory manager initialisation error\n");
            mutex_unlock(&dev->struct_mutex);
            return ret;
      }

      dev_priv->agp_initialized = 1;
      dev_priv->agp_offset = agp->offset;
      mutex_unlock(&dev->struct_mutex);

      DRM_DEBUG("offset = %u, size = %u", agp->offset, agp->size);
      return 0;
}

int via_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
      drm_via_fb_t *fb = data;
      drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
      int ret;

      mutex_lock(&dev->struct_mutex);
      ret = drm_sman_set_range(&dev_priv->sman, VIA_MEM_VIDEO, 0,
                         fb->size >> VIA_MM_ALIGN_SHIFT);

      if (ret) {
            DRM_ERROR("VRAM memory manager initialisation error\n");
            mutex_unlock(&dev->struct_mutex);
            return ret;
      }

      dev_priv->vram_initialized = 1;
      dev_priv->vram_offset = fb->offset;

      mutex_unlock(&dev->struct_mutex);
      DRM_DEBUG("offset = %u, size = %u", fb->offset, fb->size);

      return 0;

}

int via_final_context(struct drm_device *dev, int context)
{
      drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;

      via_release_futex(dev_priv, context);

      /* Linux specific until context tracking code gets ported to BSD */
      /* Last context, perform cleanup */
      if (dev->ctx_count == 1 && dev->dev_private) {
            DRM_DEBUG("Last Context\n");
            if (dev->irq)
                  drm_irq_uninstall(dev);
            via_cleanup_futex(dev_priv);
            via_do_cleanup_map(dev);
      }
      return 1;
}

void via_lastclose(struct drm_device *dev)
{
      drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;

      if (!dev_priv)
            return;

      mutex_lock(&dev->struct_mutex);
      drm_sman_cleanup(&dev_priv->sman);
      dev_priv->vram_initialized = 0;
      dev_priv->agp_initialized = 0;
      mutex_unlock(&dev->struct_mutex);
}     

int via_mem_alloc(struct drm_device *dev, void *data,
              struct drm_file *file_priv)
{
      drm_via_mem_t *mem = data;
      int retval = 0;
      struct drm_memblock_item *item;
      drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
      unsigned long tmpSize;

      if (mem->type > VIA_MEM_AGP) {
            DRM_ERROR("Unknown memory type allocation\n");
            return -EINVAL;
      }
      mutex_lock(&dev->struct_mutex);
      if (0 == ((mem->type == VIA_MEM_VIDEO) ? dev_priv->vram_initialized :
                  dev_priv->agp_initialized)) {
            DRM_ERROR
                ("Attempt to allocate from uninitialized memory manager.\n");
            mutex_unlock(&dev->struct_mutex);
            return -EINVAL;
      }

      tmpSize = (mem->size + VIA_MM_ALIGN_MASK) >> VIA_MM_ALIGN_SHIFT;
      item = drm_sman_alloc(&dev_priv->sman, mem->type, tmpSize, 0,
                        (unsigned long)file_priv);
      mutex_unlock(&dev->struct_mutex);
      if (item) {
            mem->offset = ((mem->type == VIA_MEM_VIDEO) ?
                        dev_priv->vram_offset : dev_priv->agp_offset) +
                (item->mm->
                 offset(item->mm, item->mm_info) << VIA_MM_ALIGN_SHIFT);
            mem->index = item->user_hash.key;
      } else {
            mem->offset = 0;
            mem->size = 0;
            mem->index = 0;
            DRM_DEBUG("Video memory allocation failed\n");
            retval = -ENOMEM;
      }

      return retval;
}

int via_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
      drm_via_private_t *dev_priv = dev->dev_private;
      drm_via_mem_t *mem = data;
      int ret;

      mutex_lock(&dev->struct_mutex);
      ret = drm_sman_free_key(&dev_priv->sman, mem->index);
      mutex_unlock(&dev->struct_mutex);
      DRM_DEBUG("free = 0x%lx\n", mem->index);

      return ret;
}


void via_reclaim_buffers_locked(struct drm_device * dev,
                        struct drm_file *file_priv)
{
      drm_via_private_t *dev_priv = dev->dev_private;

      mutex_lock(&dev->struct_mutex);
      if (drm_sman_owner_clean(&dev_priv->sman, (unsigned long)file_priv)) {
            mutex_unlock(&dev->struct_mutex);
            return;
      }

      if (dev->driver->dma_quiescent) {
            dev->driver->dma_quiescent(dev);
      }

      drm_sman_owner_cleanup(&dev_priv->sman, (unsigned long)file_priv);
      mutex_unlock(&dev->struct_mutex);
      return;
}

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