libdrm/nouveau: incr refcount on ref fence before decr on old fence

[android-x86/external-libdrm.git] / shared-core / via_map.c

/*
 * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
 * Copyright 2001-2003 S3 Graphics, Inc. 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
 * VIA, S3 GRAPHICS, AND/OR ITS 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.
 */
#include "drmP.h"
#include "via_drm.h"
#include "via_drv.h"

static int via_do_init_map(struct drm_device * dev, drm_via_init_t * init)
{
        drm_via_private_t *dev_priv = dev->dev_private;
        int ret = 0;

        DRM_DEBUG("\n");

        dev_priv->sarea = drm_getsarea(dev);
        if (!dev_priv->sarea) {
                DRM_ERROR("could not find sarea!\n");
                dev->dev_private = (void *)dev_priv;
                via_do_cleanup_map(dev);
                return -EINVAL;
        }

        dev_priv->fb = drm_core_findmap(dev, init->fb_offset);
        if (!dev_priv->fb) {
                DRM_ERROR("could not find framebuffer!\n");
                dev->dev_private = (void *)dev_priv;
                via_do_cleanup_map(dev);
                return -EINVAL;
        }
        dev_priv->mmio = drm_core_findmap(dev, init->mmio_offset);
        if (!dev_priv->mmio) {
                DRM_ERROR("could not find mmio region!\n");
                dev->dev_private = (void *)dev_priv;
                via_do_cleanup_map(dev);
                return -EINVAL;
        }

        dev_priv->sarea_priv =
            (drm_via_sarea_t *) ((u8 *) dev_priv->sarea->handle +
                                 init->sarea_priv_offset);

        dev_priv->agpAddr = init->agpAddr;

        via_init_futex( dev_priv );
#ifdef VIA_HAVE_DMABLIT
        via_init_dmablit( dev );
#endif
#ifdef VIA_HAVE_FENCE
        dev_priv->emit_0_sequence = 0;
        dev_priv->have_idlelock = 0;
        spin_lock_init(&dev_priv->fence_lock);
#endif /* VIA_HAVE_FENCE */
        dev->dev_private = (void *)dev_priv;
#ifdef VIA_HAVE_BUFFER
        ret = drm_bo_driver_init(dev);
        if (ret)
                DRM_ERROR("Could not initialize buffer object driver.\n");
#endif
        return ret;

}

int via_do_cleanup_map(struct drm_device * dev)
{
        via_dma_cleanup(dev);

        return 0;
}


int via_map_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
        drm_via_init_t *init = data;

        DRM_DEBUG("\n");

        switch (init->func) {
        case VIA_INIT_MAP:
                return via_do_init_map(dev, init);
        case VIA_CLEANUP_MAP:
                return via_do_cleanup_map(dev);
        }

        return -EINVAL;
}

int via_driver_load(struct drm_device *dev, unsigned long chipset)
{
        drm_via_private_t *dev_priv;
        int ret = 0;

        dev_priv = drm_calloc(1, sizeof(drm_via_private_t), DRM_MEM_DRIVER);
        if (dev_priv == NULL)
                return -ENOMEM;

        dev->dev_private = (void *)dev_priv;

        dev_priv->chipset = chipset;

#ifdef VIA_HAVE_CORE_MM
        ret = drm_sman_init(&dev_priv->sman, 2, 12, 8);
        if (ret) {
                drm_free(dev_priv, sizeof(*dev_priv), DRM_MEM_DRIVER);
                return ret;
        }
#endif

        ret = drm_vblank_init(dev, 1);
        if (ret) {
                drm_sman_takedown(&dev_priv->sman);
                drm_free(dev_priv, sizeof(drm_via_private_t), DRM_MEM_DRIVER);
                return ret;
        }

        return 0;

}

int via_driver_unload(struct drm_device *dev)
{
        drm_via_private_t *dev_priv = dev->dev_private;

#ifdef VIA_HAVE_CORE_MM
        drm_sman_takedown(&dev_priv->sman);
#endif
        drm_free(dev_priv, sizeof(drm_via_private_t), DRM_MEM_DRIVER);

        return 0;
}