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/**********************************************************

 * Copyright 2009 VMware, 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, sublicense, 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 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

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

 * 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 "pipe/p_compiler.h"

#include "util/u_inlines.h"

#include "util/u_memory.h"

#include "util/u_format.h"

#include "vmw_context.h"

#include "vmw_screen.h"

#include "vmw_surface.h"

#include "svga_drm_public.h"

#include "state_tracker/drm_driver.h"

#include "vmwgfx_drm.h"

#include 

#include 

struct dri1_api_version {

   int major;

   int minor;

   int patch_level;

};

static struct svga_winsys_surface *

vmw_drm_surface_from_handle(struct svga_winsys_screen *sws,

			    struct winsys_handle *whandle,

			    SVGA3dSurfaceFormat *format);

static boolean

vmw_drm_surface_get_handle(struct svga_winsys_screen *sws,

			   struct svga_winsys_surface *surface,

			   unsigned stride,

			   struct winsys_handle *whandle);

static struct dri1_api_version drm_required = { 2, 1, 0 };

static struct dri1_api_version drm_compat = { 2, 0, 0 };

static boolean

vmw_dri1_check_version(const struct dri1_api_version *cur,

		       const struct dri1_api_version *required,

		       const struct dri1_api_version *compat,

		       const char component[])

{

   if (cur->major > required->major && cur->major <= compat->major)

      return TRUE;

   if (cur->major == required->major && cur->minor >= required->minor)

      return TRUE;

   vmw_error("%s version failure.\n", component);

   vmw_error("%s version is %d.%d.%d and this driver can only work\n"

             "with versions %d.%d.x through %d.x.x.\n",

             component,

             cur->major, cur->minor, cur->patch_level,

             required->major, required->minor, compat->major);

   return FALSE;

}

/* This is actually the entrypoint to the entire driver,

 * called by the target bootstrap code.

 */

struct svga_winsys_screen *

svga_drm_winsys_screen_create(int fd)

{

   struct vmw_winsys_screen *vws;

   struct dri1_api_version drm_ver;

   drmVersionPtr ver;

   ver = drmGetVersion(fd);

   if (ver == NULL)

      return NULL;

   drm_ver.major = ver->version_major;

   drm_ver.minor = ver->version_minor;

   drm_ver.patch_level = 0; /* ??? */

   drmFreeVersion(ver);

   if (!vmw_dri1_check_version(&drm_ver, &drm_required,

			       &drm_compat, "vmwgfx drm driver"))

      return NULL;

   vws = vmw_winsys_create( fd, FALSE );

   if (!vws)

      goto out_no_vws;

   /* XXX do this properly */

   vws->base.surface_from_handle = vmw_drm_surface_from_handle;

   vws->base.surface_get_handle = vmw_drm_surface_get_handle;

   return &vws->base;

out_no_vws:

   return NULL;

}

static INLINE boolean

vmw_dri1_intersect_src_bbox(struct drm_clip_rect *dst,

			    int dst_x,

			    int dst_y,

			    const struct drm_clip_rect *src,

			    const struct drm_clip_rect *bbox)

{

   int xy1;

   int xy2;

   xy1 = ((int)src->x1 > (int)bbox->x1 + dst_x) ? src->x1 :

      (int)bbox->x1 + dst_x;

   xy2 = ((int)src->x2 < (int)bbox->x2 + dst_x) ? src->x2 :

      (int)bbox->x2 + dst_x;

   if (xy1 >= xy2 || xy1 < 0)

      return FALSE;

   dst->x1 = xy1;

   dst->x2 = xy2;

   xy1 = ((int)src->y1 > (int)bbox->y1 + dst_y) ? src->y1 :

      (int)bbox->y1 + dst_y;

   xy2 = ((int)src->y2 < (int)bbox->y2 + dst_y) ? src->y2 :

      (int)bbox->y2 + dst_y;

   if (xy1 >= xy2 || xy1 < 0)

      return FALSE;

   dst->y1 = xy1;

   dst->y2 = xy2;

   return TRUE;

}

static struct svga_winsys_surface *

vmw_drm_surface_from_handle(struct svga_winsys_screen *sws,

			    struct winsys_handle *whandle,

			    SVGA3dSurfaceFormat *format)

{

    struct vmw_svga_winsys_surface *vsrf;

    struct svga_winsys_surface *ssrf;

    struct vmw_winsys_screen *vws = vmw_winsys_screen(sws);

    union drm_vmw_surface_reference_arg arg;

    struct drm_vmw_surface_arg *req = &arg.req;

    struct drm_vmw_surface_create_req *rep = &arg.rep;

    int ret;

    int i;

    /**

     * The vmware device specific handle is the hardware SID.

     * FIXME: We probably want to move this to the ioctl implementations.

     */

    memset(&arg, 0, sizeof(arg));

    req->sid = whandle->handle;

    ret = drmCommandWriteRead(vws->ioctl.drm_fd, DRM_VMW_REF_SURFACE,

			      &arg, sizeof(arg));

    if (ret) {

        vmw_error("Failed referencing shared surface. SID %d.\n"

                  "Error %d (%s).\n",

                  whandle->handle, ret, strerror(-ret));

	return NULL;

    }

    if (rep->mip_levels[0] != 1) {

        vmw_error("Incorrect number of mipmap levels on shared surface."

                  " SID %d, levels %d\n",

                  whandle->handle, rep->mip_levels[0]);

	goto out_mip;

    }

    for (i=1; i < DRM_VMW_MAX_SURFACE_FACES; ++i) {

	if (rep->mip_levels[i] != 0) {

            vmw_error("Incorrect number of faces levels on shared surface."

                      " SID %d, face %d present.\n",

                      whandle->handle, i);

	    goto out_mip;

	}

   }

    vsrf = CALLOC_STRUCT(vmw_svga_winsys_surface);

    if (!vsrf)

	goto out_mip;

    pipe_reference_init(&vsrf->refcnt, 1);

    p_atomic_set(&vsrf->validated, 0);

    vsrf->screen = vws;

    vsrf->sid = whandle->handle;

    ssrf = svga_winsys_surface(vsrf);

    *format = rep->format;

    return ssrf;

out_mip:

    vmw_ioctl_surface_destroy(vws, whandle->handle);

    return NULL;

}

static boolean

vmw_drm_surface_get_handle(struct svga_winsys_screen *sws,

			   struct svga_winsys_surface *surface,

			   unsigned stride,

			   struct winsys_handle *whandle)

{

    struct vmw_svga_winsys_surface *vsrf;

    if (!surface)

	return FALSE;

    vsrf = vmw_svga_winsys_surface(surface);

    whandle->handle = vsrf->sid;

    whandle->stride = stride;

    return TRUE;

}