From mboxrd@z Thu Jan 1 00:00:00 1970 From: Miklos Aubert Subject: Nouveau driver and Linux 2.6.33 RT Date: Wed, 2 Feb 2011 22:12:25 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE To: linux-rt-users@vger.kernel.org Return-path: Received: from mail-ww0-f44.google.com ([74.125.82.44]:59300 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752660Ab1BBVM1 convert rfc822-to-8bit (ORCPT ); Wed, 2 Feb 2011 16:12:27 -0500 Received: by wwa36 with SMTP id 36so457231wwa.1 for ; Wed, 02 Feb 2011 13:12:26 -0800 (PST) Sender: linux-rt-users-owner@vger.kernel.org List-ID: Hello fellow RT users, I've built a 2.6.33.7 kernel with the RT patch and the Nouveau driver enabled, but Xorg doesn't start. Using the _same_ configuration and removing the RT patch (vanilla kernel from kernel.org), Xorg works. Booting with drm.debug=3D1, and comparing the kernel logs, I find that the RT kernel seems to be having trouble here : [ 31.651720] [drm:drm_ioctl], pid=3D1904, cmd=3D0x6440, nr=3D0x40, de= v 0xe200, auth=3D1 [ 31.651724] [drm:drm_ioctl], no function [ 31.651726] [drm:drm_ioctl], ret =3D ffffffea These messages come from the drm_ioctl() function in drivers/gpu/drm/drm_drv.c. But which ioctl are we calling here ? I guess one can find it from the cmd=3D0x6440 code. Not me though, I trie= d to make sense of the source code, but my C is very rusty and it's macros and includes all the way down... Anyway, to me this problem seems to come from the modifications that the RT=A0patch does on drivers/gpu/drm/nouveau/nouveau_channel.c. It changes the definition macro from DRM_IOCTL_DEF to DRM_IOCTL_DEF_DRV, but also removes some lines. Why ? struct drm_ioctl_desc nouveau_ioctls[] =3D { - DRM_IOCTL_DEF(DRM_NOUVEAU_CARD_INIT, nouveau_ioctl_card_init, DRM_A= UTH), - DRM_IOCTL_DEF(DRM_NOUVEAU_GETPARAM, nouveau_ioctl_getparam, DRM_AUT= H), - DRM_IOCTL_DEF(DRM_NOUVEAU_SETPARAM, nouveau_ioctl_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), - DRM_IOCTL_DEF(DRM_NOUVEAU_CHANNEL_ALLOC, nouveau_ioctl_fifo_alloc, DRM_AUTH), - DRM_IOCTL_DEF(DRM_NOUVEAU_CHANNEL_FREE, nouveau_ioctl_fifo_free, DR= M_AUTH), - DRM_IOCTL_DEF(DRM_NOUVEAU_GROBJ_ALLOC, nouveau_ioctl_grobj_alloc, D= RM_AUTH), - DRM_IOCTL_DEF(DRM_NOUVEAU_NOTIFIEROBJ_ALLOC, nouveau_ioctl_notifier_alloc, DRM_AUTH), - DRM_IOCTL_DEF(DRM_NOUVEAU_GPUOBJ_FREE, nouveau_ioctl_gpuobj_free, D= RM_AUTH), - DRM_IOCTL_DEF(DRM_NOUVEAU_GEM_NEW, nouveau_gem_ioctl_new, DRM_AUTH)= , - DRM_IOCTL_DEF(DRM_NOUVEAU_GEM_PUSHBUF, nouveau_gem_ioctl_pushbuf, D= RM_AUTH), - DRM_IOCTL_DEF(DRM_NOUVEAU_GEM_PUSHBUF_CALL, nouveau_gem_ioctl_pushbuf_call, DRM_AUTH), - DRM_IOCTL_DEF(DRM_NOUVEAU_GEM_PIN, nouveau_gem_ioctl_pin, DRM_AUTH)= , - DRM_IOCTL_DEF(DRM_NOUVEAU_GEM_UNPIN, nouveau_gem_ioctl_unpin, DRM_A= UTH), - DRM_IOCTL_DEF(DRM_NOUVEAU_GEM_CPU_PREP, nouveau_gem_ioctl_cpu_prep, DRM_AUTH), - DRM_IOCTL_DEF(DRM_NOUVEAU_GEM_CPU_FINI, nouveau_gem_ioctl_cpu_fini, DRM_AUTH), - DRM_IOCTL_DEF(DRM_NOUVEAU_GEM_INFO, nouveau_gem_ioctl_info, DRM_AUT= H), - DRM_IOCTL_DEF(DRM_NOUVEAU_GEM_PUSHBUF_CALL2, nouveau_gem_ioctl_pushbuf_call2, DRM_AUTH), + DRM_IOCTL_DEF_DRV(NOUVEAU_GETPARAM, nouveau_ioctl_getparam, DRM_AUT= H), + DRM_IOCTL_DEF_DRV(NOUVEAU_SETPARAM, nouveau_ioctl_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), + DRM_IOCTL_DEF_DRV(NOUVEAU_CHANNEL_ALLOC, nouveau_ioctl_fifo_alloc, DRM_AUTH), + DRM_IOCTL_DEF_DRV(NOUVEAU_CHANNEL_FREE, nouveau_ioctl_fifo_free, DR= M_AUTH), + DRM_IOCTL_DEF_DRV(NOUVEAU_GROBJ_ALLOC, nouveau_ioctl_grobj_alloc, D= RM_AUTH), + DRM_IOCTL_DEF_DRV(NOUVEAU_NOTIFIEROBJ_ALLOC, nouveau_ioctl_notifier_alloc, DRM_AUTH), + DRM_IOCTL_DEF_DRV(NOUVEAU_GPUOBJ_FREE, nouveau_ioctl_gpuobj_free, D= RM_AUTH), + DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_NEW, nouveau_gem_ioctl_new, DRM_AUTH)= , + DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_PUSHBUF, nouveau_gem_ioctl_pushbuf, D= RM_AUTH), + DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_CPU_PREP, nouveau_gem_ioctl_cpu_prep, DRM_AUTH), + DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_CPU_FINI, nouveau_gem_ioctl_cpu_fini, DRM_AUTH), + DRM_IOCTL_DEF_DRV(NOUVEAU_GEM_INFO, nouveau_gem_ioctl_info, DRM_AUT= H), }; -- To unsubscribe from this list: send the line "unsubscribe linux-rt-user= s" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html