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Sat, 23 May 2020 00:23:23 -0700 (PDT) Date: Sat, 23 May 2020 15:23:02 +0800 From: Shawn Guo To: Jordan Crouse Cc: linux-arm-msm@vger.kernel.org, AngeloGioacchino Del Regno , Daniel Vetter , David Airlie , Drew Davenport , Georgi Djakov , Greg Kroah-Hartman , Jeffrey Hugo , Kalyan Thota , Rob Clark , Sam Ravnborg , Sean Paul , Thomas Gleixner , Thomas Zimmermann , Wambui Karuga , dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org, linux-kernel@vger.kernel.org, tongtiangen Subject: Re: [PATCH v1 1/3] drm/msm: Attach the IOMMU device during initialization Message-ID: <20200523072300.GB28198@dragon> References: <20200522220316.23772-1-jcrouse@codeaurora.org> <20200522220316.23772-2-jcrouse@codeaurora.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20200522220316.23772-2-jcrouse@codeaurora.org> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On Fri, May 22, 2020 at 04:03:14PM -0600, Jordan Crouse wrote: > diff --git a/drivers/gpu/drm/msm/msm_gpummu.c b/drivers/gpu/drm/msm/msm_gpummu.c > index 34980d8eb7ad..0ad0f848560a 100644 > --- a/drivers/gpu/drm/msm/msm_gpummu.c > +++ b/drivers/gpu/drm/msm/msm_gpummu.c > @@ -21,11 +21,6 @@ struct msm_gpummu { > #define GPUMMU_PAGE_SIZE SZ_4K > #define TABLE_SIZE (sizeof(uint32_t) * GPUMMU_VA_RANGE / GPUMMU_PAGE_SIZE) > > -static int msm_gpummu_attach(struct msm_mmu *mmu) > -{ > - return 0; > -} > - > static void msm_gpummu_detach(struct msm_mmu *mmu) > { > } > @@ -85,7 +80,6 @@ static void msm_gpummu_destroy(struct msm_mmu *mmu) > } > > static const struct msm_mmu_funcs funcs = { > - .attach = msm_gpummu_attach, > .detach = msm_gpummu_detach, > .map = msm_gpummu_map, > .unmap = msm_gpummu_unmap, > diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c > index ad58cfe5998e..e35dab5792cf 100644 > --- a/drivers/gpu/drm/msm/msm_iommu.c > +++ b/drivers/gpu/drm/msm/msm_iommu.c > @@ -66,7 +66,6 @@ static void msm_iommu_destroy(struct msm_mmu *mmu) > } > > static const struct msm_mmu_funcs funcs = { > - .attach = msm_iommu_attach, It causes an unused function warning as below. drivers/gpu/drm/msm/msm_iommu.c:26:12: warning: ‘msm_iommu_attach’ defined but not used [-Wunused-function] static int msm_iommu_attach(struct msm_mmu *mmu) ^~~~~~~~~~~~~~~~ Not sure if you will use it again in future patches though. Shawn > .detach = msm_iommu_detach, > .map = msm_iommu_map, > .unmap = msm_iommu_unmap, > @@ -76,6 +75,7 @@ static const struct msm_mmu_funcs funcs = { > struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain) > { > struct msm_iommu *iommu; > + int ret; > > iommu = kzalloc(sizeof(*iommu), GFP_KERNEL); > if (!iommu) > @@ -85,5 +85,11 @@ struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain) > msm_mmu_init(&iommu->base, dev, &funcs); > iommu_set_fault_handler(domain, msm_fault_handler, iommu); > > + ret = iommu_attach_device(iommu->domain, dev); > + if (ret) { > + kfree(iommu); > + return ERR_PTR(ret); > + } > + > return &iommu->base; > } > diff --git a/drivers/gpu/drm/msm/msm_mmu.h b/drivers/gpu/drm/msm/msm_mmu.h > index 67a623f14319..bae9e8e67ec1 100644 > --- a/drivers/gpu/drm/msm/msm_mmu.h > +++ b/drivers/gpu/drm/msm/msm_mmu.h > @@ -10,7 +10,6 @@ > #include > > struct msm_mmu_funcs { > - int (*attach)(struct msm_mmu *mmu); > void (*detach)(struct msm_mmu *mmu); > int (*map)(struct msm_mmu *mmu, uint64_t iova, struct sg_table *sgt, > unsigned len, int prot); > -- > 2.17.1 > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 28D37C433E0 for ; Sat, 23 May 2020 07:23:27 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id EF38D20723 for ; Sat, 23 May 2020 07:23:26 +0000 (UTC) Authentication-Results: mail.kernel.org; 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Sat, 23 May 2020 00:23:24 -0700 (PDT) Received: from dragon ([80.251.214.228]) by smtp.gmail.com with ESMTPSA id h4sm9368364pje.29.2020.05.23.00.23.11 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Sat, 23 May 2020 00:23:23 -0700 (PDT) Date: Sat, 23 May 2020 15:23:02 +0800 From: Shawn Guo To: Jordan Crouse Subject: Re: [PATCH v1 1/3] drm/msm: Attach the IOMMU device during initialization Message-ID: <20200523072300.GB28198@dragon> References: <20200522220316.23772-1-jcrouse@codeaurora.org> <20200522220316.23772-2-jcrouse@codeaurora.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200522220316.23772-2-jcrouse@codeaurora.org> User-Agent: Mutt/1.9.4 (2018-02-28) X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sean Paul , freedreno@lists.freedesktop.org, Thomas Zimmermann , Jeffrey Hugo , David Airlie , linux-arm-msm@vger.kernel.org, Kalyan Thota , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, tongtiangen , Greg Kroah-Hartman , Drew Davenport , Thomas Gleixner , AngeloGioacchino Del Regno , Sam Ravnborg , Georgi Djakov , Wambui Karuga Content-Type: text/plain; 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