From patchwork Thu Dec 15 00:07:42 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Laura Abbott X-Patchwork-Id: 9475189 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id BD771607EE for ; Thu, 15 Dec 2016 00:17:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A7C72285FD for ; Thu, 15 Dec 2016 00:17:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 97D7328619; Thu, 15 Dec 2016 00:17:41 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3E777285FD for ; Thu, 15 Dec 2016 00:17:41 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1cHJiA-0003cO-UK; Thu, 15 Dec 2016 00:15:50 +0000 Received: from merlin.infradead.org ([2001:4978:20e::2]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1cHJax-0003Ok-8P for linux-arm-kernel@bombadil.infradead.org; Thu, 15 Dec 2016 00:08:23 +0000 Received: from mail-qt0-f170.google.com ([209.85.216.170]) by merlin.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1cHJav-0000jw-Fp for linux-arm-kernel@lists.infradead.org; Thu, 15 Dec 2016 00:08:22 +0000 Received: by mail-qt0-f170.google.com with SMTP id n6so41827997qtd.1 for ; Wed, 14 Dec 2016 16:07:58 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=e5z3K4Z0qjMalBkcOUrk0Gx1/JbP0/TMlx2BDgzglOg=; b=YiXV+XG1f6UwXBSkP2vYmxb9tFnk2euQA09ji7DFjurJ2TFvqqlCjNDPbprPy6pB/V XgLMlIL2+cexEPAcizZ+zZekkXSvNezv3FTIyNZJZqMKr1JwXugLbSI0xgKBr9ywiZoa ySfaq6sr6yv62KMNZU++9g9XPnZ0cvka4UiP9Z6A+0lXtBCaoO5hlj5Dx/D/MNZwS3VG oL4DHANuyGuQFSQP+HUuQPx2DFLXqaIkaDZPRu5TxmLuIDoXP0jvlEKY0vetQSP1uYpT 2iQ8PqsbMucTIGsrfp3lCYiNagSGrDDzu0EYYPQfTBck4OkPSD1g1HsNJ+BWvEV7Ntiq OWQg== X-Gm-Message-State: AKaTC00CNPL8BbZouhgmwdBRggMppcwFJr3lc6yqGRUaNjca1ohlljO2SPNTPBSB9y4+I6eo X-Received: by 10.237.48.193 with SMTP id 59mr98579701qtf.27.1481760477707; Wed, 14 Dec 2016 16:07:57 -0800 (PST) Received: from labbott-redhat-machine.redhat.com ([2601:602:9800:177f::df9b]) by smtp.gmail.com with ESMTPSA id 21sm32935830qkf.17.2016.12.14.16.07.54 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 14 Dec 2016 16:07:56 -0800 (PST) From: Laura Abbott To: Sumit Semwal , Riley Andrews , arve@android.com Subject: [RFC PATCH 3/4] staging: android: ion: Remove page faulting support Date: Wed, 14 Dec 2016 16:07:42 -0800 Message-Id: <1481760463-3515-4-git-send-email-labbott@redhat.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1481760463-3515-1-git-send-email-labbott@redhat.com> References: <1481760463-3515-1-git-send-email-labbott@redhat.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161214_190821_579829_BA6E878C X-CRM114-Status: GOOD ( 12.25 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devel@driverdev.osuosl.org, romlem@google.com, Greg Kroah-Hartman , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, Bryan Huntsman , Laura Abbott , pratikp@codeaurora.org, Brian Starkey , linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Unclear if this is wanted or needed? Not-signed-off-by: Laura Abbott --- drivers/staging/android/ion/ion.c | 74 --------------------------------------- 1 file changed, 74 deletions(-) diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c index 76b874a0..86dba07 100644 --- a/drivers/staging/android/ion/ion.c +++ b/drivers/staging/android/ion/ion.c @@ -41,37 +41,11 @@ #include "ion_priv.h" #include "compat_ion.h" -bool ion_buffer_fault_user_mappings(struct ion_buffer *buffer) -{ - return (buffer->flags & ION_FLAG_CACHED) && - !(buffer->flags & ION_FLAG_CACHED_NEEDS_SYNC); -} - bool ion_buffer_cached(struct ion_buffer *buffer) { return !!(buffer->flags & ION_FLAG_CACHED); } -static inline struct page *ion_buffer_page(struct page *page) -{ - return (struct page *)((unsigned long)page & ~(1UL)); -} - -static inline bool ion_buffer_page_is_dirty(struct page *page) -{ - return !!((unsigned long)page & 1UL); -} - -static inline void ion_buffer_page_dirty(struct page **page) -{ - *page = (struct page *)((unsigned long)(*page) | 1UL); -} - -static inline void ion_buffer_page_clean(struct page **page) -{ - *page = (struct page *)((unsigned long)(*page) & ~(1UL)); -} - /* this function should only be called while dev->lock is held */ static void ion_buffer_add(struct ion_device *dev, struct ion_buffer *buffer) @@ -139,25 +113,6 @@ static struct ion_buffer *ion_buffer_create(struct ion_heap *heap, buffer->dev = dev; buffer->size = len; - if (ion_buffer_fault_user_mappings(buffer)) { - int num_pages = PAGE_ALIGN(buffer->size) / PAGE_SIZE; - struct scatterlist *sg; - int i, j, k = 0; - - buffer->pages = vmalloc(sizeof(struct page *) * num_pages); - if (!buffer->pages) { - ret = -ENOMEM; - goto err1; - } - - for_each_sg(table->sgl, sg, table->nents, i) { - struct page *page = sg_page(sg); - - for (j = 0; j < sg->length / PAGE_SIZE; j++) - buffer->pages[k++] = page++; - } - } - buffer->dev = dev; buffer->size = len; INIT_LIST_HEAD(&buffer->vmas); @@ -845,25 +800,6 @@ struct ion_vma_list { struct vm_area_struct *vma; }; -static int ion_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) -{ - struct ion_buffer *buffer = vma->vm_private_data; - unsigned long pfn; - int ret; - - mutex_lock(&buffer->lock); - ion_buffer_page_dirty(buffer->pages + vmf->pgoff); - BUG_ON(!buffer->pages || !buffer->pages[vmf->pgoff]); - - pfn = page_to_pfn(ion_buffer_page(buffer->pages[vmf->pgoff])); - ret = vm_insert_pfn(vma, (unsigned long)vmf->virtual_address, pfn); - mutex_unlock(&buffer->lock); - if (ret) - return VM_FAULT_ERROR; - - return VM_FAULT_NOPAGE; -} - static void ion_vm_open(struct vm_area_struct *vma) { struct ion_buffer *buffer = vma->vm_private_data; @@ -900,7 +836,6 @@ static void ion_vm_close(struct vm_area_struct *vma) static const struct vm_operations_struct ion_vma_ops = { .open = ion_vm_open, .close = ion_vm_close, - .fault = ion_vm_fault, }; static int ion_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma) @@ -914,15 +849,6 @@ static int ion_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma) return -EINVAL; } - if (ion_buffer_fault_user_mappings(buffer)) { - vma->vm_flags |= VM_IO | VM_PFNMAP | VM_DONTEXPAND | - VM_DONTDUMP; - vma->vm_private_data = buffer; - vma->vm_ops = &ion_vma_ops; - ion_vm_open(vma); - return 0; - } - if (!(buffer->flags & ION_FLAG_CACHED)) vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);