vmwgfx_ioctl.c

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/**************************************************************************
 *
 * Copyright © 2009 VMware, Inc., Palo Alto, CA., 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 COPYRIGHT HOLDERS, AUTHORS 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 "vmwgfx_drv.h"
#include <drm/vmwgfx_drm.h>
#include "vmwgfx_kms.h"

int vmw_getparam_ioctl(struct drm_device *dev, void *data,
               struct drm_file *file_priv)
{
    struct vmw_private *dev_priv = vmw_priv(dev);
    struct drm_vmw_getparam_arg *param =
        (struct drm_vmw_getparam_arg *)data;

    switch (param->param) {
    case DRM_VMW_PARAM_NUM_STREAMS:
        param->value = vmw_overlay_num_overlays(dev_priv);
        break;
    case DRM_VMW_PARAM_NUM_FREE_STREAMS:
        param->value = vmw_overlay_num_free_overlays(dev_priv);
        break;
    case DRM_VMW_PARAM_3D:
        param->value = vmw_fifo_have_3d(dev_priv) ? 1 : 0;
        break;
    case DRM_VMW_PARAM_HW_CAPS:
        param->value = dev_priv->capabilities;
        break;
    case DRM_VMW_PARAM_FIFO_CAPS:
        param->value = dev_priv->fifo.capabilities;
        break;
    case DRM_VMW_PARAM_MAX_FB_SIZE:
        param->value = dev_priv->vram_size;
        break;
    case DRM_VMW_PARAM_FIFO_HW_VERSION:
    {
        __le32 __iomem *fifo_mem = dev_priv->mmio_virt;
        const struct vmw_fifo_state *fifo = &dev_priv->fifo;

        param->value =
            ioread32(fifo_mem +
                 ((fifo->capabilities &
                   SVGA_FIFO_CAP_3D_HWVERSION_REVISED) ?
                  SVGA_FIFO_3D_HWVERSION_REVISED :
                  SVGA_FIFO_3D_HWVERSION));
        break;
    }
    default:
        DRM_ERROR("Illegal vmwgfx get param request: %d\n",
              param->param);
        return -EINVAL;
    }

    return 0;
}


int vmw_get_cap_3d_ioctl(struct drm_device *dev, void *data,
             struct drm_file *file_priv)
{
    struct drm_vmw_get_3d_cap_arg *arg =
        (struct drm_vmw_get_3d_cap_arg *) data;
    struct vmw_private *dev_priv = vmw_priv(dev);
    uint32_t size;
    __le32 __iomem *fifo_mem;
    void __user *buffer = (void __user *)((unsigned long)(arg->buffer));
    void *bounce;
    int ret;

    if (unlikely(arg->pad64 != 0)) {
        DRM_ERROR("Illegal GET_3D_CAP argument.\n");
        return -EINVAL;
    }

    size = (SVGA_FIFO_3D_CAPS_LAST - SVGA_FIFO_3D_CAPS + 1) << 2;

    if (arg->max_size < size)
        size = arg->max_size;

    bounce = vmalloc(size);
    if (unlikely(bounce == NULL)) {
        DRM_ERROR("Failed to allocate bounce buffer for 3D caps.\n");
        return -ENOMEM;
    }

    fifo_mem = dev_priv->mmio_virt;
    memcpy_fromio(bounce, &fifo_mem[SVGA_FIFO_3D_CAPS], size);

    ret = copy_to_user(buffer, bounce, size);
    if (ret)
        ret = -EFAULT;
    vfree(bounce);

    if (unlikely(ret != 0))
        DRM_ERROR("Failed to report 3D caps info.\n");

    return ret;
}

int vmw_present_ioctl(struct drm_device *dev, void *data,
              struct drm_file *file_priv)
{
    struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
    struct vmw_private *dev_priv = vmw_priv(dev);
    struct drm_vmw_present_arg *arg =
        (struct drm_vmw_present_arg *)data;
    struct vmw_surface *surface;
    struct vmw_master *vmaster = vmw_master(file_priv->master);
    struct drm_vmw_rect __user *clips_ptr;
    struct drm_vmw_rect *clips = NULL;
    struct drm_mode_object *obj;
    struct vmw_framebuffer *vfb;
    uint32_t num_clips;
    int ret;

    num_clips = arg->num_clips;
    clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;

    if (unlikely(num_clips == 0))
        return 0;

    if (clips_ptr == NULL) {
        DRM_ERROR("Variable clips_ptr must be specified.\n");
        ret = -EINVAL;
        goto out_clips;
    }

    clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
    if (clips == NULL) {
        DRM_ERROR("Failed to allocate clip rect list.\n");
        ret = -ENOMEM;
        goto out_clips;
    }

    ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
    if (ret) {
        DRM_ERROR("Failed to copy clip rects from userspace.\n");
        ret = -EFAULT;
        goto out_no_copy;
    }

    ret = mutex_lock_interruptible(&dev->mode_config.mutex);
    if (unlikely(ret != 0)) {
        ret = -ERESTARTSYS;
        goto out_no_mode_mutex;
    }

    obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
    if (!obj) {
        DRM_ERROR("Invalid framebuffer id.\n");
        ret = -EINVAL;
        goto out_no_fb;
    }
    vfb = vmw_framebuffer_to_vfb(obj_to_fb(obj));

    ret = ttm_read_lock(&vmaster->lock, true);
    if (unlikely(ret != 0))
        goto out_no_ttm_lock;

    ret = vmw_user_surface_lookup_handle(dev_priv, tfile, arg->sid,
                         &surface);
    if (ret)
        goto out_no_surface;

    ret = vmw_kms_present(dev_priv, file_priv,
                  vfb, surface, arg->sid,
                  arg->dest_x, arg->dest_y,
                  clips, num_clips);

    /* vmw_user_surface_lookup takes one ref so does new_fb */
    vmw_surface_unreference(&surface);

out_no_surface:
    ttm_read_unlock(&vmaster->lock);
out_no_ttm_lock:
out_no_fb:
    mutex_unlock(&dev->mode_config.mutex);
out_no_mode_mutex:
out_no_copy:
    kfree(clips);
out_clips:
    return ret;
}

int vmw_present_readback_ioctl(struct drm_device *dev, void *data,
                   struct drm_file *file_priv)
{
    struct vmw_private *dev_priv = vmw_priv(dev);
    struct drm_vmw_present_readback_arg *arg =
        (struct drm_vmw_present_readback_arg *)data;
    struct drm_vmw_fence_rep __user *user_fence_rep =
        (struct drm_vmw_fence_rep __user *)
        (unsigned long)arg->fence_rep;
    struct vmw_master *vmaster = vmw_master(file_priv->master);
    struct drm_vmw_rect __user *clips_ptr;
    struct drm_vmw_rect *clips = NULL;
    struct drm_mode_object *obj;
    struct vmw_framebuffer *vfb;
    uint32_t num_clips;
    int ret;

    num_clips = arg->num_clips;
    clips_ptr = (struct drm_vmw_rect *)(unsigned long)arg->clips_ptr;

    if (unlikely(num_clips == 0))
        return 0;

    if (clips_ptr == NULL) {
        DRM_ERROR("Argument clips_ptr must be specified.\n");
        ret = -EINVAL;
        goto out_clips;
    }

    clips = kcalloc(num_clips, sizeof(*clips), GFP_KERNEL);
    if (clips == NULL) {
        DRM_ERROR("Failed to allocate clip rect list.\n");
        ret = -ENOMEM;
        goto out_clips;
    }

    ret = copy_from_user(clips, clips_ptr, num_clips * sizeof(*clips));
    if (ret) {
        DRM_ERROR("Failed to copy clip rects from userspace.\n");
        ret = -EFAULT;
        goto out_no_copy;
    }

    ret = mutex_lock_interruptible(&dev->mode_config.mutex);
    if (unlikely(ret != 0)) {
        ret = -ERESTARTSYS;
        goto out_no_mode_mutex;
    }

    obj = drm_mode_object_find(dev, arg->fb_id, DRM_MODE_OBJECT_FB);
    if (!obj) {
        DRM_ERROR("Invalid framebuffer id.\n");
        ret = -EINVAL;
        goto out_no_fb;
    }

    vfb = vmw_framebuffer_to_vfb(obj_to_fb(obj));
    if (!vfb->dmabuf) {
        DRM_ERROR("Framebuffer not dmabuf backed.\n");
        ret = -EINVAL;
        goto out_no_fb;
    }

    ret = ttm_read_lock(&vmaster->lock, true);
    if (unlikely(ret != 0))
        goto out_no_ttm_lock;

    ret = vmw_kms_readback(dev_priv, file_priv,
                   vfb, user_fence_rep,
                   clips, num_clips);

    ttm_read_unlock(&vmaster->lock);
out_no_ttm_lock:
out_no_fb:
    mutex_unlock(&dev->mode_config.mutex);
out_no_mode_mutex:
out_no_copy:
    kfree(clips);
out_clips:
    return ret;
}


unsigned int vmw_fops_poll(struct file *filp, struct poll_table_struct *wait)
{
    struct drm_file *file_priv = filp->private_data;
    struct vmw_private *dev_priv =
        vmw_priv(file_priv->minor->dev);

    vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
    return drm_poll(filp, wait);
}


ssize_t vmw_fops_read(struct file *filp, char __user *buffer,
              size_t count, loff_t *offset)
{
    struct drm_file *file_priv = filp->private_data;
    struct vmw_private *dev_priv =
        vmw_priv(file_priv->minor->dev);

    vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
    return drm_read(filp, buffer, count, offset);
}