From patchwork Thu Oct 15 07:36:32 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 7403581 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id B515ABF90C for ; Thu, 15 Oct 2015 07:34:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C402B207E1 for ; Thu, 15 Oct 2015 07:34:17 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id C60CE2089F for ; Thu, 15 Oct 2015 07:34:16 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8BD2F7A10F; Thu, 15 Oct 2015 00:34:13 -0700 (PDT) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-wi0-f173.google.com (mail-wi0-f173.google.com [209.85.212.173]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9CC0A7A0EB for ; Thu, 15 Oct 2015 00:34:06 -0700 (PDT) Received: by wicll6 with SMTP id ll6so27562978wic.0 for ; Thu, 15 Oct 2015 00:34:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=HpemBcK6dR+w6eqk9/FpqHDKlLHiQhfF3cXQm1acXxo=; b=koqxts6fhCR+Hbl28Zut3R5HB01qzWKFp90rsxBMseceDlTyLwcApaJ3BZDH0JyDZ4 ZdldkTFvTmUh4Lc1Lqxr1rcNDvLqAOj07Wj6KumJyd73/SlSGF1Hes8nIH2F0I0KIQ7X zzZ9zwVDHNvsfGYj5Icjfj8N2SDoesL8Jgs08= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=HpemBcK6dR+w6eqk9/FpqHDKlLHiQhfF3cXQm1acXxo=; b=UvWKc57DWs8p8RJwASyelLd5R3BSQYAzFo7aepcmIOOAvukrAeEbwkWmbm6lX3PN/N K0ctV/0cmet5nJQOi09C2CIo9xjU1Tre6R3zwuLcIchgv285C1JLfuJZMFlcodlAmovK dHNyAnyPUuyKOM4Vv7b5UlvmxPIu9o1fWgyzkWcPTEx3xnOP9I9EokcBP95UJFCtyLp9 I7v1w9eiKzsoCAwhrpFqRn61gmvvnqJTD/OcECj29b4pWTUe0TIlEu4wvNuqjOL1VCi6 8parqYYUKqo7oJIHno3gn1v9GZuwWV9bi2KADAGdoYoow1emLwMpIeeWplXxwLRLoSLg iEOQ== X-Gm-Message-State: ALoCoQlfgsgSsv6/FLwQrnGE+NOIQ/shFrqdzJ7W00E7KxXdj2rPZbiQqHnU9bzaSQOaiOvNcSm6 X-Received: by 10.180.86.231 with SMTP id s7mr30999654wiz.15.1444894445437; Thu, 15 Oct 2015 00:34:05 -0700 (PDT) Received: from phenom.ffwll.local (212-51-149-109.fiber7.init7.net. [212.51.149.109]) by smtp.gmail.com with ESMTPSA id z4sm10201014wjz.29.2015.10.15.00.34.04 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Thu, 15 Oct 2015 00:34:04 -0700 (PDT) From: Daniel Vetter To: DRI Development Subject: [PATCH 16/25] drm/gma500: Add driver private mutex for the fault handler Date: Thu, 15 Oct 2015 09:36:32 +0200 Message-Id: <1444894601-5200-17-git-send-email-daniel.vetter@ffwll.ch> X-Mailer: git-send-email 2.5.1 In-Reply-To: <1444894601-5200-1-git-send-email-daniel.vetter@ffwll.ch> References: <1444894601-5200-1-git-send-email-daniel.vetter@ffwll.ch> Cc: Daniel Vetter , Daniel Vetter X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Spam-Status: No, score=-4.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED, T_DKIM_INVALID, T_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 There's currently two places where the gma500 fault handler relies upon dev->struct_mutex: - To protect r->mappping - To make sure vm_insert_pfn isn't called concurrently (in which case the 2nd thread would get an error code). Everything else (specifically psb_gtt_pin) is already protected by some other locks. Hence just create a new driver-private mmap_mutex just for this function. With this gma500 is complete dev->struct_mutex free! Signed-off-by: Daniel Vetter --- drivers/gpu/drm/gma500/gem.c | 4 ++-- drivers/gpu/drm/gma500/gtt.c | 1 + drivers/gpu/drm/gma500/psb_drv.h | 2 ++ 3 files changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/gma500/gem.c b/drivers/gpu/drm/gma500/gem.c index f0357f525f56..506224b3a0ad 100644 --- a/drivers/gpu/drm/gma500/gem.c +++ b/drivers/gpu/drm/gma500/gem.c @@ -182,7 +182,7 @@ int psb_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) /* Make sure we don't parallel update on a fault, nor move or remove something from beneath our feet */ - mutex_lock(&dev->struct_mutex); + mutex_lock(&dev_priv->mmap_mutex); /* For now the mmap pins the object and it stays pinned. As things stand that will do us no harm */ @@ -208,7 +208,7 @@ int psb_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf) ret = vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, pfn); fail: - mutex_unlock(&dev->struct_mutex); + mutex_unlock(&dev_priv->mmap_mutex); switch (ret) { case 0: case -ERESTARTSYS: diff --git a/drivers/gpu/drm/gma500/gtt.c b/drivers/gpu/drm/gma500/gtt.c index ce015db59dc6..8f69225ce2b4 100644 --- a/drivers/gpu/drm/gma500/gtt.c +++ b/drivers/gpu/drm/gma500/gtt.c @@ -425,6 +425,7 @@ int psb_gtt_init(struct drm_device *dev, int resume) if (!resume) { mutex_init(&dev_priv->gtt_mutex); + mutex_init(&dev_priv->mmap_mutex); psb_gtt_alloc(dev); } diff --git a/drivers/gpu/drm/gma500/psb_drv.h b/drivers/gpu/drm/gma500/psb_drv.h index e21726ecac32..3bd2c726dd61 100644 --- a/drivers/gpu/drm/gma500/psb_drv.h +++ b/drivers/gpu/drm/gma500/psb_drv.h @@ -465,6 +465,8 @@ struct drm_psb_private { struct mutex gtt_mutex; struct resource *gtt_mem; /* Our PCI resource */ + struct mutex mmap_mutex; + struct psb_mmu_driver *mmu; struct psb_mmu_pd *pf_pd;