From patchwork Wed Sep 7 08:38:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikko Perttunen X-Patchwork-Id: 603543 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3F3B2C54EE9 for ; Wed, 7 Sep 2022 08:41:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229954AbiIGIlW (ORCPT ); Wed, 7 Sep 2022 04:41:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40958 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229998AbiIGIlT (ORCPT ); Wed, 7 Sep 2022 04:41:19 -0400 Received: from mail.kapsi.fi (mail.kapsi.fi [IPv6:2001:67c:1be8::25]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1CDFF7756D; Wed, 7 Sep 2022 01:40:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kapsi.fi; s=20161220; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=rYp//Jg1lyxpKWkb291uTJu2CIqUef18RIn6yGFAgCg=; b=sk0s1bJUkmVcTL7zsheAfsjCAS J9oofWFE3mABrjS5FTMsVKaWtpfSKcCK2MVUpK487L2IE0mHYF5JVKaGUQNoOpMPT3roXExSJzFCF TmgRxT+lrhMu5tw94PZqYpzpCpPIIi/h+pwvxmSPAE08a7MfMhi3QnsiJ6mIgKZpFyc4FZGufq1t/ i66h6lOnzBYTlM75b3MMYa6q++R1TGd28qL+s7gZ3vh35RY4MPYm5vV3u0tOgsErHndX9WAGXt4NY YpY7lWMWH7DwGLNR0e7nsz31IBLfBDCD0sHfmc4mTIZXSN8F/mEgdmsPpvVwEv3yRb1kECm/dfCRD FPNdnWQQ==; Received: from 91-158-25-70.elisa-laajakaista.fi ([91.158.25.70] helo=toshino.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1oVqaE-00DbXj-NQ; Wed, 07 Sep 2022 11:38:54 +0300 From: Mikko Perttunen To: Thierry Reding , Jonathan Hunter Cc: Mikko Perttunen , devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH 1/3] gpu: host1x: Select context device based on attached IOMMU Date: Wed, 7 Sep 2022 11:38:42 +0300 Message-Id: <20220907083844.2486805-2-cyndis@kapsi.fi> X-Mailer: git-send-email 2.37.0 In-Reply-To: <20220907083844.2486805-1-cyndis@kapsi.fi> References: <20220907083844.2486805-1-cyndis@kapsi.fi> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 91.158.25.70 X-SA-Exim-Mail-From: cyndis@kapsi.fi X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Mikko Perttunen On Tegra234, engines that are programmed through Host1x channels can be attached to either the NISO0 or NISO1 SMMU. Because of that, when selecting a context device to use with an engine, we need to select one that is also attached to the same SMMU. Add a parameter to host1x_memory_context_alloc to specify which device we are allocating a context for, and use it to pick an appropriate context device. Signed-off-by: Mikko Perttunen --- drivers/gpu/drm/tegra/uapi.c | 2 +- drivers/gpu/host1x/context.c | 5 +++++ include/linux/host1x.h | 1 + 3 files changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/tegra/uapi.c b/drivers/gpu/drm/tegra/uapi.c index a98239cb0e29..5adab6b22916 100644 --- a/drivers/gpu/drm/tegra/uapi.c +++ b/drivers/gpu/drm/tegra/uapi.c @@ -116,7 +116,7 @@ int tegra_drm_ioctl_channel_open(struct drm_device *drm, void *data, struct drm_ if (supported) context->memory_context = host1x_memory_context_alloc( - host, get_task_pid(current, PIDTYPE_TGID)); + host, client->base.dev, get_task_pid(current, PIDTYPE_TGID)); if (IS_ERR(context->memory_context)) { if (PTR_ERR(context->memory_context) != -EOPNOTSUPP) { diff --git a/drivers/gpu/host1x/context.c b/drivers/gpu/host1x/context.c index b08cf11f9a66..8d6447cdd882 100644 --- a/drivers/gpu/host1x/context.c +++ b/drivers/gpu/host1x/context.c @@ -104,6 +104,7 @@ void host1x_memory_context_list_free(struct host1x_memory_context_list *cdl) } struct host1x_memory_context *host1x_memory_context_alloc(struct host1x *host1x, + struct device *dev, struct pid *pid) { struct host1x_memory_context_list *cdl = &host1x->context_list; @@ -118,6 +119,10 @@ struct host1x_memory_context *host1x_memory_context_alloc(struct host1x *host1x, for (i = 0; i < cdl->len; i++) { struct host1x_memory_context *cd = &cdl->devs[i]; + if (cd->dev.iommu->iommu_dev != dev->iommu->iommu_dev) { + continue; + } + if (cd->owner == pid) { refcount_inc(&cd->ref); mutex_unlock(&cdl->lock); diff --git a/include/linux/host1x.h b/include/linux/host1x.h index cb2100d9b0ff..ef05de1f4f1e 100644 --- a/include/linux/host1x.h +++ b/include/linux/host1x.h @@ -469,6 +469,7 @@ struct host1x_memory_context { #ifdef CONFIG_IOMMU_API struct host1x_memory_context *host1x_memory_context_alloc(struct host1x *host1x, + struct device *dev, struct pid *pid); void host1x_memory_context_get(struct host1x_memory_context *cd); void host1x_memory_context_put(struct host1x_memory_context *cd);