[Mesa-dev] [PATCH 12/15] gallium: Add winsys loader for device enumeration and driver multiplexing.
Jose Fonseca
jfonseca at vmware.com
Mon Mar 26 05:56:35 PDT 2012
This doesn't look like a "winsys" per se, but rather an auxiliary library to create winsys and screens, meant to be used by state trackers. Is this right?
If so then I believe the right place would be somewhere src/gallium/auxiliary .
Jose
----- Original Message -----
> The goal is to have a uniform interface to create winsys and
> pipe_screen instances for any driver, exposing the device enumeration
> capabilities that might be supported by the operating system (for now
> there's a "drm" back-end using udev and a "sw" back-end that always
> returns the same built-in devices).
>
> The typical use case of this library will be:
> >
> > struct ws_loader_device devs[n];
> > struct pipe_screen *screen;
> >
> > ws_loader_probe(&devs, n);
> >[pick some device from the array...]
> >
> > screen = ws_loader_create_screen(dev, library_search_path);
> >[do something with screen...]
> >
> > screen->destroy(screen);
> > ws_loader_release(&devs, N);
> >
>
> A part of the code was taken from targets/gbm/pipe_loader.c, which
> will be removed and replaced with calls into this library by a future
> commit.
> ---
> configure.ac | 7 +
> src/gallium/winsys/loader/Makefile.am | 34 +++++
> src/gallium/winsys/loader/ws_loader.c | 102 +++++++++++++
> src/gallium/winsys/loader/ws_loader.h | 136 +++++++++++++++++
> src/gallium/winsys/loader/ws_loader_drm.c | 218
> ++++++++++++++++++++++++++++
> src/gallium/winsys/loader/ws_loader_priv.h | 47 ++++++
> src/gallium/winsys/loader/ws_loader_sw.c | 107 ++++++++++++++
> 7 files changed, 651 insertions(+)
> create mode 100644 src/gallium/winsys/loader/Makefile.am
> create mode 100644 src/gallium/winsys/loader/ws_loader.c
> create mode 100644 src/gallium/winsys/loader/ws_loader.h
> create mode 100644 src/gallium/winsys/loader/ws_loader_drm.c
> create mode 100644 src/gallium/winsys/loader/ws_loader_priv.h
> create mode 100644 src/gallium/winsys/loader/ws_loader_sw.c
>
> diff --git a/configure.ac b/configure.ac
> index bf5330d..a28052c 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -1936,6 +1936,10 @@ if test "x$NEED_G3DVL_DRI" = xyes; then
> GALLIUM_WINSYS_DIRS="$GALLIUM_WINSYS_DIRS g3dvl/dri"
> fi
>
> +if test "x$enable_gallium_loader" = xyes; then
> + GALLIUM_WINSYS_DIRS="$GALLIUM_WINSYS_DIRS loader/"
> +fi
> +
> dnl Tell Automake which drivers to build
> for driver in $GALLIUM_DRIVERS_DIRS; do
> case "x$driver" in
> @@ -1957,6 +1961,8 @@ done
> AM_CONDITIONAL(HAVE_GALAHAD_GALLIUM, test x$HAVE_GALAHAD_GALLIUM =
> xyes)
> AM_CONDITIONAL(HAVE_IDENTITY_GALLIUM, test x$HAVE_IDENTITY_GALLIUM =
> xyes)
> AM_CONDITIONAL(HAVE_NOOP_GALLIUM, test x$HAVE_NOOP_GALLIUM = xyes)
> +AM_CONDITIONAL(HAVE_DRM_LOADER_GALLIUM, test
> x$enable_gallium_drm_loader = xyes)
> +AM_CONDITIONAL(HAVE_XLIB_LOADER_GALLIUM, test x$HAVE_WINSYS_XLIB =
> xyes)
> AC_SUBST([GALLIUM_MAKE_DIRS])
>
> dnl prepend CORE_DIRS to SRC_DIRS
> @@ -1974,6 +1980,7 @@ dnl Substitute the config
> AC_CONFIG_FILES([configs/autoconf
> src/gallium/winsys/sw/null/Makefile
> src/gallium/winsys/sw/xlib/Makefile
> + src/gallium/winsys/loader/Makefile
> src/gallium/drivers/Makefile
> src/gallium/drivers/r300/Makefile
> src/gbm/Makefile
> diff --git a/src/gallium/winsys/loader/Makefile.am
> b/src/gallium/winsys/loader/Makefile.am
> new file mode 100644
> index 0000000..45e34da
> --- /dev/null
> +++ b/src/gallium/winsys/loader/Makefile.am
> @@ -0,0 +1,34 @@
> +AUTOMAKE_OPTIONS = subdir-objects
> +
> +AM_CPPFLAGS = $(DEFINES) \
> + -I$(top_srcdir)/include \
> + -I$(top_srcdir)/src/gallium/include \
> + -I$(top_srcdir)/src/gallium/auxiliary \
> + -I$(top_srcdir)/src/gallium/winsys
> +
> +AM_CFLAGS = $(PIC_FLAGS)
> +
> +noinst_LTLIBRARIES = libws_loader.la
> +
> +libws_loader_la_SOURCES = \
> + ws_loader.h \
> + ws_loader_priv.h \
> + ws_loader.c \
> + ws_loader_sw.c
> +
> +libws_loader_la_LIBADD = \
> + $(top_srcdir)/src/gallium/winsys/sw/null/libws_null.la
> +
> +if HAVE_XLIB_LOADER_GALLIUM
> +libws_loader_la_LIBADD += \
> + $(top_srcdir)/src/gallium/winsys/sw/xlib/libws_xlib.la
> +AM_CFLAGS += -DHAVE_WS_LOADER_XLIB
> +endif
> +
> +if HAVE_DRM_LOADER_GALLIUM
> +libws_loader_la_SOURCES += ws_loader_drm.c
> +AM_CFLAGS += -DHAVE_WS_LOADER_DRM $(LIBDRM_CFLAGS)
> +endif
> +
> +# FIXME: Remove when the rest of Gallium is converted to automake.
> +default: all
> diff --git a/src/gallium/winsys/loader/ws_loader.c
> b/src/gallium/winsys/loader/ws_loader.c
> new file mode 100644
> index 0000000..7071fc7
> --- /dev/null
> +++ b/src/gallium/winsys/loader/ws_loader.c
> @@ -0,0 +1,102 @@
> +/**************************************************************************
> + *
> + * 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.
> + *
> +
> **************************************************************************/
> +
> +#include "loader/ws_loader_priv.h"
> +
> +#include "util/u_inlines.h"
> +#include "util/u_memory.h"
> +#include "util/u_string.h"
> +#include "util/u_dl.h"
> +
> +#define MODULE_PREFIX "pipe_"
> +
> +static int (*backends[])(struct ws_loader_device **, int) = {
> +#ifdef HAVE_WS_LOADER_DRM
> + &ws_loader_drm_probe,
> +#endif
> + &ws_loader_sw_probe
> +};
> +
> +int
> +ws_loader_probe(struct ws_loader_device **devs, int ndev)
> +{
> + int i, n = 0;
> +
> + for (i = 0; i < Elements(backends); i++)
> + n += backends[i](&devs[n], MAX2(0, ndev - n));
> +
> + return n;
> +}
> +
> +void
> +ws_loader_release(struct ws_loader_device **devs, int ndev)
> +{
> + int i;
> +
> + for (i = 0; i < ndev; i++)
> + devs[i]->ops->release(&devs[i]);
> +}
> +
> +struct pipe_screen *
> +ws_loader_create_screen(struct ws_loader_device *dev,
> + const char *library_paths)
> +{
> + return dev->ops->create_screen(dev, library_paths);
> +}
> +
> +struct util_dl_library *
> +ws_loader_find_module(struct ws_loader_device *dev,
> + const char *library_paths)
> +{
> + struct util_dl_library *lib;
> + const char *next;
> + char path[PATH_MAX];
> + int len, ret;
> +
> + for (next = library_paths; *next; library_paths = next + 1) {
> + next = util_strchrnul(library_paths, ':');
> + len = next - library_paths;
> +
> + if (len)
> + ret = util_snprintf(path, sizeof(path), "%.*s/%s%s%s",
> + len, library_paths,
> + MODULE_PREFIX, dev->driver_name,
> UTIL_DL_EXT);
> + else
> + ret = util_snprintf(path, sizeof(path), "%s%s%s",
> + MODULE_PREFIX, dev->driver_name,
> UTIL_DL_EXT);
> +
> + if (ret > 0 && ret < sizeof(path)) {
> + lib = util_dl_open(path);
> + if (lib) {
> + debug_printf("loaded %s\n", path);
> + return lib;
> + }
> + }
> + }
> +
> + return NULL;
> +}
> diff --git a/src/gallium/winsys/loader/ws_loader.h
> b/src/gallium/winsys/loader/ws_loader.h
> new file mode 100644
> index 0000000..2554da5
> --- /dev/null
> +++ b/src/gallium/winsys/loader/ws_loader.h
> @@ -0,0 +1,136 @@
> +/**************************************************************************
> + *
> + * 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.
> + *
> +
> **************************************************************************/
> +
> +/**
> + * \file Winsys that provides device enumeration and multiplexing of
> + * other winsys.
> + */
> +
> +#ifndef WS_LOADER_H
> +#define WS_LOADER_H
> +
> +#include "pipe/p_compiler.h"
> +
> +#ifdef __cplusplus
> +extern "C" {
> +#endif
> +
> +struct pipe_screen;
> +
> +enum ws_loader_device_type {
> + WS_LOADER_DEVICE_SOFTWARE,
> + WS_LOADER_DEVICE_PCI,
> + NUM_WS_LOADER_DEVICE_TYPES
> +};
> +
> +/**
> + * A device known to the winsys loader.
> + */
> +struct ws_loader_device {
> + enum ws_loader_device_type type;
> +
> + union {
> + struct {
> + int vendor_id;
> + int chip_id;
> + } pci;
> + }; /**< Discriminated by \a type */
> +
> + const char *driver_name;
> + const struct ws_loader_ops *ops;
> +};
> +
> +/**
> + * Get a list of known devices.
> + *
> + * \param devs Array that will be filled with pointers to the
> devices
> + * available in the system.
> + * \param ndev Maximum number of devices to return.
> + * \return Number of devices available in the system.
> + */
> +int
> +ws_loader_probe(struct ws_loader_device **devs, int ndev);
> +
> +/**
> + * Create a pipe_screen for the specified device.
> + *
> + * \param dev Device the screen will be created for.
> + * \param library_paths Colon-separated list of filesystem paths
> that
> + * will be used to look for the pipe driver
> + * module that handles this device.
> + */
> +struct pipe_screen *
> +ws_loader_create_screen(struct ws_loader_device *dev,
> + const char *library_paths);
> +
> +/**
> + * Release resources allocated for a list of devices.
> + *
> + * Should be called when the specified devices are no longer in use
> to
> + * release any resources allocated by ws_loader_probe.
> + *
> + * \param devs Devices to release.
> + * \param ndev Number of devices to release.
> + */
> +void
> +ws_loader_release(struct ws_loader_device **devs, int ndev);
> +
> +/**
> + * Get a list of known software devices.
> + *
> + * This function is platform-specific.
> + *
> + * \sa ws_loader_probe
> + */
> +int
> +ws_loader_sw_probe(struct ws_loader_device **devs, int ndev);
> +
> +/**
> + * Get a list of known DRM devices.
> + *
> + * This function is platform-specific.
> + *
> + * \sa ws_loader_probe
> + */
> +int
> +ws_loader_drm_probe(struct ws_loader_device **devs, int ndev);
> +
> +/**
> + * Initialize a DRM device in an already opened fd.
> + *
> + * This function is platform-specific.
> + *
> + * \sa ws_loader_probe
> + */
> +boolean
> +ws_loader_drm_probe_fd(struct ws_loader_device **dev, int fd);
> +
> +#ifdef __cplusplus
> +}
> +#endif
> +
> +#endif /* WS_LOADER_H */
> diff --git a/src/gallium/winsys/loader/ws_loader_drm.c
> b/src/gallium/winsys/loader/ws_loader_drm.c
> new file mode 100644
> index 0000000..817872b
> --- /dev/null
> +++ b/src/gallium/winsys/loader/ws_loader_drm.c
> @@ -0,0 +1,218 @@
> +/**************************************************************************
> + *
> + * 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 at bitplanet.net>
> + * Benjamin Franzke <benjaminfranzke at googlemail.com>
> + *
> +
> **************************************************************************/
> +
> +#include <fcntl.h>
> +#include <stdio.h>
> +#include <libudev.h>
> +#include <xf86drm.h>
> +
> +#include "state_tracker/drm_driver.h"
> +#include "loader/ws_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 ws_loader_drm_device {
> + struct ws_loader_device base;
> + struct util_dl_library *lib;
> + int fd;
> +};
> +
> +#define ws_loader_drm_device(dev) ((struct ws_loader_drm_device
> *)dev)
> +
> +static boolean
> +find_drm_pci_id(struct ws_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.pci.vendor_id,
> + &ddev->base.pci.chip_id) != 2)
> + goto fail;
> +
> + return TRUE;
> +
> + fail:
> + if (device)
> + udev_device_unref(device);
> + if (udev)
> + udev_unref(udev);
> +
> + debug_printf("pci id for fd %d not found\n", ddev->fd);
> + return FALSE;
> +}
> +
> +static boolean
> +find_drm_driver_name(struct ws_loader_drm_device *ddev)
> +{
> + struct ws_loader_device *dev = &ddev->base;
> + int i, j;
> +
> + for (i = 0; driver_map[i].driver; i++) {
> + if (dev->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->pci.chip_id == driver_map[i].chip_ids[j]) {
> + dev->driver_name = driver_map[i].driver;
> + goto found;
> + }
> + }
> + }
> +
> + return FALSE;
> +
> + found:
> + debug_printf("driver for %04x:%04x: %s\n", dev->pci.vendor_id,
> + dev->pci.chip_id, dev->driver_name);
> + return TRUE;
> +}
> +
> +static struct ws_loader_ops ws_loader_drm_ops;
> +
> +boolean
> +ws_loader_drm_probe_fd(struct ws_loader_device **dev, int fd)
> +{
> + struct ws_loader_drm_device *ddev =
> CALLOC_STRUCT(ws_loader_drm_device);
> +
> + ddev->base.type = WS_LOADER_DEVICE_PCI;
> + ddev->base.ops = &ws_loader_drm_ops;
> + ddev->fd = 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
> +ws_loader_drm_probe(struct ws_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 || !ws_loader_drm_probe_fd(&devs[j], fd))
> + close(fd);
> +
> + j++;
> + }
> +
> + return j;
> +}
> +
> +static void
> +ws_loader_drm_release(struct ws_loader_device **dev)
> +{
> + struct ws_loader_drm_device *ddev = ws_loader_drm_device(*dev);
> +
> + if (ddev->lib)
> + util_dl_close(ddev->lib);
> +
> + close(ddev->fd);
> + FREE(ddev);
> + *dev = NULL;
> +}
> +
> +static struct pipe_screen *
> +ws_loader_drm_create_screen(struct ws_loader_device *dev,
> + const char *library_paths)
> +{
> + struct ws_loader_drm_device *ddev = ws_loader_drm_device(dev);
> + const struct drm_driver_descriptor *dd;
> +
> + if (!ddev->lib)
> + ddev->lib = ws_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 ws_loader_ops ws_loader_drm_ops = {
> + .create_screen = ws_loader_drm_create_screen,
> + .release = ws_loader_drm_release
> +};
> diff --git a/src/gallium/winsys/loader/ws_loader_priv.h
> b/src/gallium/winsys/loader/ws_loader_priv.h
> new file mode 100644
> index 0000000..0de33d7
> --- /dev/null
> +++ b/src/gallium/winsys/loader/ws_loader_priv.h
> @@ -0,0 +1,47 @@
> +/**************************************************************************
> + *
> + * 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.
> + *
> +
> **************************************************************************/
> +
> +#ifndef WS_LOADER_PRIV_H
> +#define WS_LOADER_PRIV_H
> +
> +#include "ws_loader.h"
> +
> +struct ws_loader_ops {
> + struct pipe_screen *(*create_screen)(struct ws_loader_device
> *dev,
> + const char *library_paths);
> +
> + void (*release)(struct ws_loader_device **dev);
> +};
> +
> +/**
> + * Open the pipe driver module that handles a specified device.
> + */
> +struct util_dl_library *
> +ws_loader_find_module(struct ws_loader_device *dev,
> + const char *library_paths);
> +
> +#endif /* WS_LOADER_PRIV_H */
> diff --git a/src/gallium/winsys/loader/ws_loader_sw.c
> b/src/gallium/winsys/loader/ws_loader_sw.c
> new file mode 100644
> index 0000000..b3f925e
> --- /dev/null
> +++ b/src/gallium/winsys/loader/ws_loader_sw.c
> @@ -0,0 +1,107 @@
> +/**************************************************************************
> + *
> + * 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.
> + *
> +
> **************************************************************************/
> +
> +#include "loader/ws_loader_priv.h"
> +
> +#include "util/u_memory.h"
> +#include "util/u_dl.h"
> +#include "sw/null/null_sw_winsys.h"
> +#include "target-helpers/inline_sw_helper.h"
> +#include "state_tracker/xlib_sw_winsys.h"
> +
> +struct ws_loader_sw_device {
> + struct ws_loader_device base;
> + struct util_dl_library *lib;
> + struct sw_winsys *ws;
> +};
> +
> +#define ws_loader_sw_device(dev) ((struct ws_loader_sw_device *)dev)
> +
> +static struct ws_loader_ops ws_loader_sw_ops;
> +
> +static struct sw_winsys *(*backends[])() = {
> +#ifdef HAVE_WINSYS_XLIB
> + x11_sw_create,
> +#endif
> + null_sw_create
> +};
> +
> +int
> +ws_loader_sw_probe(struct ws_loader_device **devs, int ndev)
> +{
> + int i;
> +
> + for (i = 0; i < Elements(backends); i++) {
> + if (i < ndev) {
> + struct ws_loader_sw_device *sdev =
> CALLOC_STRUCT(ws_loader_sw_device);
> +
> + sdev->base.type = WS_LOADER_DEVICE_SOFTWARE;
> + sdev->base.driver_name = "swrast";
> + sdev->base.ops = &ws_loader_sw_ops;
> + sdev->ws = backends[i]();
> + devs[i] = &sdev->base;
> + }
> + }
> +
> + return i;
> +}
> +
> +static void
> +ws_loader_sw_release(struct ws_loader_device **dev)
> +{
> + struct ws_loader_sw_device *sdev = ws_loader_sw_device(*dev);
> +
> + if (sdev->lib)
> + util_dl_close(sdev->lib);
> +
> + FREE(sdev);
> + *dev = NULL;
> +}
> +
> +static struct pipe_screen *
> +ws_loader_sw_create_screen(struct ws_loader_device *dev,
> + const char *library_paths)
> +{
> + struct ws_loader_sw_device *sdev = ws_loader_sw_device(dev);
> + struct pipe_screen *(*init)(struct sw_winsys *);
> +
> + if (!sdev->lib)
> + sdev->lib = ws_loader_find_module(dev, library_paths);
> + if (!sdev->lib)
> + return NULL;
> +
> + init = (void *)util_dl_get_proc_address(sdev->lib,
> "swrast_create_screen");
> + if (!init)
> + return NULL;
> +
> + return init(sdev->ws);
> +}
> +
> +static struct ws_loader_ops ws_loader_sw_ops = {
> + .create_screen = ws_loader_sw_create_screen,
> + .release = ws_loader_sw_release
> +};
> --
> 1.7.9.2
>
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