/**************************************************************************
*
* Copyright 2011 Intel Corporation
* Copyright 2012 Francisco Jerez
* 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 TUNGSTEN 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.
*
* Authors:
* Kristian Høgsberg <krh@bitplanet.net>
* Benjamin Franzke <benjaminfranzke@googlemail.com>
*
**************************************************************************/
#include <fcntl.h>
#include <stdio.h>
#include <libudev.h>
#include <xf86drm.h>
#ifdef HAVE_PIPE_LOADER_XCB
#include <xcb/dri2.h>
#endif
#include "state_tracker/drm_driver.h"
#include "pipe_loader_priv.h"
#include "util/u_memory.h"
#include "util/u_dl.h"
#include "util/u_debug.h"
#define DRIVER_MAP_GALLIUM_ONLY
#include "pci_ids/pci_id_driver_map.h"
struct pipe_loader_drm_device {
struct pipe_loader_device base;
struct util_dl_library *lib;
int fd;
};
#define pipe_loader_drm_device(dev) ((struct pipe_loader_drm_device *)dev)
static boolean
find_drm_pci_id(struct pipe_loader_drm_device *ddev)
{
struct udev *udev = NULL;
struct udev_device *parent, *device = NULL;
struct stat stat;
const char *pci_id;
if (fstat(ddev->fd, &stat) < 0)
goto fail;
udev = udev_new();
if (!udev)
goto fail;
device = udev_device_new_from_devnum(udev, 'c', stat.st_rdev);
if (!device)
goto fail;
parent = udev_device_get_parent(device);
if (!parent)
goto fail;
pci_id = udev_device_get_property_value(parent, "PCI_ID");
if (!pci_id ||
sscanf(pci_id
, "%x:%x", &ddev
->base.
u.
pci.
vendor_id, &ddev->base.u.pci.chip_id) != 2)
goto fail;
return TRUE;
fail:
if (device)
udev_device_unref(device);
if (udev)
udev_unref(udev);
return FALSE;
}
static boolean
find_drm_driver_name(struct pipe_loader_drm_device *ddev)
{
struct pipe_loader_device *dev = &ddev->base;
int i, j;
for (i = 0; driver_map[i].driver; i++) {
if (dev->u.pci.vendor_id != driver_map[i].vendor_id)
continue;
if (driver_map[i].num_chips_ids == -1) {
dev->driver_name = driver_map[i].driver;
goto found;
}
for (j = 0; j < driver_map[i].num_chips_ids; j++) {
if (dev->u.pci.chip_id == driver_map[i].chip_ids[j]) {
dev->driver_name = driver_map[i].driver;
goto found;
}
}
}
return FALSE;
found:
return TRUE;
}
static struct pipe_loader_ops pipe_loader_drm_ops;
static void
pipe_loader_drm_x_auth(int fd)
{
#if HAVE_PIPE_LOADER_XCB
/* Try authenticate with the X server to give us access to devices that X
* is running on. */
xcb_connection_t *xcb_conn;
const xcb_setup_t *xcb_setup;
xcb_screen_iterator_t s;
xcb_dri2_connect_cookie_t connect_cookie;
xcb_dri2_connect_reply_t *connect;
drm_magic_t magic;
xcb_dri2_authenticate_cookie_t authenticate_cookie;
xcb_dri2_authenticate_reply_t *authenticate;
xcb_conn = xcb_connect(NULL, NULL);
if(!xcb_conn)
return;
xcb_setup = xcb_get_setup(xcb_conn);
if (!xcb_setup)
goto disconnect;
s = xcb_setup_roots_iterator(xcb_setup);
connect_cookie = xcb_dri2_connect_unchecked(xcb_conn, s.data->root,
XCB_DRI2_DRIVER_TYPE_DRI);
connect = xcb_dri2_connect_reply(xcb_conn, connect_cookie, NULL);
if (!connect || connect->driver_name_length
+ connect->device_name_length == 0) {
goto disconnect;
}
if (drmGetMagic(fd, &magic))
goto disconnect;
authenticate_cookie = xcb_dri2_authenticate_unchecked(xcb_conn,
s.data->root,
magic);
authenticate = xcb_dri2_authenticate_reply(xcb_conn,
authenticate_cookie,
NULL);
FREE(authenticate);
disconnect:
xcb_disconnect(xcb_conn);
#endif
}
boolean
pipe_loader_drm_probe_fd(struct pipe_loader_device **dev, int fd)
{
struct pipe_loader_drm_device *ddev = CALLOC_STRUCT(pipe_loader_drm_device);
ddev->base.type = PIPE_LOADER_DEVICE_PCI;
ddev->base.ops = &pipe_loader_drm_ops;
ddev->fd = fd;
pipe_loader_drm_x_auth(fd);
if (!find_drm_pci_id(ddev))
goto fail;
if (!find_drm_driver_name(ddev))
goto fail;
*dev = &ddev->base;
return TRUE;
fail:
FREE(ddev);
return FALSE;
}
static int
open_drm_minor(int minor)
{
char path[PATH_MAX];
snprintf(path
, sizeof(path
), DRM_DEV_NAME
, DRM_DIR_NAME
, minor
); return open(path, O_RDWR, 0);
}
int
pipe_loader_drm_probe(struct pipe_loader_device **devs, int ndev)
{
int i, j, fd;
for (i = 0, j = 0; i < DRM_MAX_MINOR; i++) {
fd = open_drm_minor(i);
if (fd < 0)
continue;
if (j >= ndev || !pipe_loader_drm_probe_fd(&devs[j], fd))
close(fd);
j++;
}
return j;
}
static void
pipe_loader_drm_release(struct pipe_loader_device **dev)
{
struct pipe_loader_drm_device *ddev = pipe_loader_drm_device(*dev);
if (ddev->lib)
util_dl_close(ddev->lib);
close(ddev->fd);
FREE(ddev);
*dev = NULL;
}
static struct pipe_screen *
pipe_loader_drm_create_screen(struct pipe_loader_device *dev,
const char *library_paths)
{
struct pipe_loader_drm_device *ddev = pipe_loader_drm_device(dev);
const struct drm_driver_descriptor *dd;
if (!ddev->lib)
ddev->lib = pipe_loader_find_module(dev, library_paths);
if (!ddev->lib)
return NULL;
dd = (const struct drm_driver_descriptor *)
util_dl_get_proc_address(ddev->lib, "driver_descriptor");
/* sanity check on the name */
if (!dd
|| strcmp(dd
->name
, ddev
->base.
driver_name) != 0) return NULL;
return dd->create_screen(ddev->fd);
}
static struct pipe_loader_ops pipe_loader_drm_ops = {
.create_screen = pipe_loader_drm_create_screen,
.release = pipe_loader_drm_release
};