From patchwork Wed Jul 1 12:52:46 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Patrik Jakobsson X-Patchwork-Id: 6703231 Return-Path: X-Original-To: patchwork-intel-gfx@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id D5C9D9F972 for ; Wed, 1 Jul 2015 12:53:09 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C96A720498 for ; Wed, 1 Jul 2015 12:53:08 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 83793204D3 for ; Wed, 1 Jul 2015 12:53:07 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EDB5D6EB06; Wed, 1 Jul 2015 05:53:06 -0700 (PDT) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTP id A076D6EB0C for ; Wed, 1 Jul 2015 05:53:05 -0700 (PDT) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga101.jf.intel.com with ESMTP; 01 Jul 2015 05:52:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,385,1432623600"; d="scan'208";a="517181628" Received: from patrik-dev-mach.isw.intel.com ([10.237.180.146]) by FMSMGA003.fm.intel.com with ESMTP; 01 Jul 2015 05:52:54 -0700 From: Patrik Jakobsson To: strace-devel@lists.sourceforge.net, ldv@altlinux.org, gabriel@lse.epita.fr Date: Wed, 1 Jul 2015 14:52:46 +0200 Message-Id: <1435755168-16207-4-git-send-email-patrik.jakobsson@linux.intel.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1435755168-16207-1-git-send-email-patrik.jakobsson@linux.intel.com> References: <1435755168-16207-1-git-send-email-patrik.jakobsson@linux.intel.com> Cc: intel-gfx@lists.freedesktop.org Subject: [Intel-gfx] [PATCH v3 3/5] drm: Add dispatcher and driver identification for DRM X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP * Makefile.am: Add compilation of drm.c * defs.h: Declarations of drm functions * drm.c: Utility functions for drm driver detection * io.c: Dispatch drm ioctls * ioctl.c: Distpatch generic and driver specific ioctls Signed-off-by: Patrik Jakobsson --- Makefile.am | 1 + defs.h | 4 ++- drm.c | 108 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ io.c | 2 +- ioctl.c | 6 +++- 5 files changed, 118 insertions(+), 3 deletions(-) create mode 100644 drm.c diff --git a/Makefile.am b/Makefile.am index e2a0f74..99382bd 100644 --- a/Makefile.am +++ b/Makefile.am @@ -41,6 +41,7 @@ strace_SOURCES = \ count.c \ desc.c \ dirent.c \ + drm.c \ evdev.c \ execve.c \ exit.c \ diff --git a/defs.h b/defs.h index 5b0670e..63e4585 100644 --- a/defs.h +++ b/defs.h @@ -573,8 +573,10 @@ extern const struct_ioctlent *ioctl_lookup(const unsigned int); extern const struct_ioctlent *ioctl_next_match(const struct_ioctlent *); extern void ioctl_print_code(const unsigned int); extern int ioctl_decode(struct tcb *, const unsigned int, long); -extern int ioctl_decode_command_number(const unsigned int); +extern int ioctl_decode_command_number(struct tcb *, const unsigned int); extern int block_ioctl(struct tcb *, const unsigned int, long); +extern int drm_decode_number(struct tcb *tcp, unsigned int arg); +extern int drm_ioctl(struct tcb *, const unsigned int, long); extern int evdev_ioctl(struct tcb *, const unsigned int, long); extern int loop_ioctl(struct tcb *, const unsigned int, long); extern int mtd_ioctl(struct tcb *, const unsigned int, long); diff --git a/drm.c b/drm.c new file mode 100644 index 0000000..61df09f --- /dev/null +++ b/drm.c @@ -0,0 +1,108 @@ +/* + * Copyright (c) 2015 Intel Corporation + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: + * Patrik Jakobsson + */ + +#include "defs.h" + +#include +#include + +#define DRM_MAX_NAME_LEN 128 + +struct drm_ioctl_priv { + char name[DRM_MAX_NAME_LEN]; +}; + +inline int drm_is_priv(const unsigned int num) +{ + return (_IOC_NR(num) >= DRM_COMMAND_BASE && + _IOC_NR(num) < DRM_COMMAND_END); +} + +static int drm_get_driver_name(struct tcb *tcp, char *name, size_t bufsize) +{ + char path[PATH_MAX]; + char link[PATH_MAX]; + int ret; + + ret = getfdpath(tcp, tcp->u_arg[0], path, PATH_MAX - 1); + if (ret < 0) + return ret; + + snprintf(link, PATH_MAX, "/sys/class/drm/%s/device/driver", + basename(path)); + + ret = readlink(link, path, PATH_MAX - 1); + if (ret < 0) + return ret; + + path[ret] = '\0'; + strncpy(name, basename(path), bufsize); + + return 0; +} + +int drm_is_driver(struct tcb *tcp, const char *name) +{ + struct drm_ioctl_priv *priv; + int ret; + + /* + * If no private data is allocated we are detecting the driver name for + * the first time and must resolve it. + */ + if (tcp->priv_data == NULL) { + tcp->priv_data = xcalloc(1, sizeof(struct drm_ioctl_priv)); + priv = tcp->priv_data; + + ret = drm_get_driver_name(tcp, priv->name, DRM_MAX_NAME_LEN); + if (ret) + return 0; + } + + priv = tcp->priv_data; + + return strncmp(name, priv->name, DRM_MAX_NAME_LEN) == 0; +} + +int drm_decode_number(struct tcb *tcp, unsigned int arg) +{ + return 0; +} + +int drm_ioctl(struct tcb *tcp, const unsigned int code, long arg) +{ + /* Free any allocated private data */ + if (exiting(tcp) && tcp->priv_data != NULL) { + free(tcp->priv_data); + tcp->priv_data = NULL; + } + + return 0; +} diff --git a/io.c b/io.c index 30ed578..6810a45 100644 --- a/io.c +++ b/io.c @@ -391,7 +391,7 @@ SYS_FUNC(ioctl) if (entering(tcp)) { printfd(tcp, tcp->u_arg[0]); tprints(", "); - if (!ioctl_decode_command_number(tcp->u_arg[1])) { + if (!ioctl_decode_command_number(tcp, tcp->u_arg[1])) { iop = ioctl_lookup(tcp->u_arg[1]); if (iop) { tprints(iop->symbol); diff --git a/ioctl.c b/ioctl.c index c67d048..0b3dd3f 100644 --- a/ioctl.c +++ b/ioctl.c @@ -182,7 +182,7 @@ hiddev_decode_number(unsigned int arg) } int -ioctl_decode_command_number(unsigned int arg) +ioctl_decode_command_number(struct tcb *tcp, unsigned int arg) { switch (_IOC_TYPE(arg)) { case 'E': @@ -204,6 +204,8 @@ ioctl_decode_command_number(unsigned int arg) return 1; } return 0; + case 'd': + return drm_decode_number(tcp, arg); case 'j': if (_IOC_DIR(arg) == _IOC_READ && _IOC_NR(arg) == 0x13) { tprintf("JSIOCGNAME(%u)", _IOC_SIZE(arg)); @@ -243,6 +245,8 @@ ioctl_decode(struct tcb *tcp, unsigned int code, long arg) case 0x22: return scsi_ioctl(tcp, code, arg); #endif + case 'd': + return drm_ioctl(tcp, code, arg); case 'L': return loop_ioctl(tcp, code, arg); case 'M':