From patchwork Mon Jun 24 19:49:04 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 11014047 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A102D112C for ; Mon, 24 Jun 2019 19:49:22 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8F95D288BD for ; Mon, 24 Jun 2019 19:49:22 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 82AC528A89; Mon, 24 Jun 2019 19:49:22 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 5E34B288BD for ; Mon, 24 Jun 2019 19:49:21 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A4CDA89612; Mon, 24 Jun 2019 19:49:19 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-pl1-x644.google.com (mail-pl1-x644.google.com [IPv6:2607:f8b0:4864:20::644]) by gabe.freedesktop.org (Postfix) with ESMTPS id 21B0F8919D for ; Mon, 24 Jun 2019 19:49:17 +0000 (UTC) Received: by mail-pl1-x644.google.com with SMTP id ay6so7452049plb.9 for ; Mon, 24 Jun 2019 12:49:17 -0700 (PDT) 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=HQT2ehGsL5kd7tOQ+U6F0I0APeClDhTVyE+CVJ72CkQ=; b=pOz3GjLrNR56HDm5OafG2GANAZkt5H7g2xOlEwg/jZQ9eUsDh4/j4k7AyPWbeUeDEt 5SAd2sSOtP9Oew/Y+FFvhlokLijVy46kCTGknzCVrm481yfrN+E/k8mExCMGWIyHCN/r XigeD2NyjIYXJFbuoD+ClBxAV/6eNXtUTVhsix71dRZlJ/iWVMMbQdogvhzCJgbnv85O QS1lUt5EXJ/01265RIGGlpOIfgTqz1XQD1jJy6JNmra7UNSAWiYIEgywltw6UGthRsbH 9ptpR7D4KFYWKTFLY+3JIpvxK+z61mRENsOaSAQPX5Ufje/BFJtov6Pjg9KR82wL09hq zikQ== X-Gm-Message-State: APjAAAXUJpCJGcskRWX3yNRGOgD8hs/PorRMawI+RLMj9Y95YQU3TvvX euwC8wUhu0wiPJHLS/EYUbu4tQ== X-Google-Smtp-Source: APXvYqxVxjgz4OUAtohEVWWYBH7I9pNGQRkpa6IT8SE6jpl9Diu7hQye/B/U+WHmCv8JIbniKhbaDg== X-Received: by 2002:a17:902:bc83:: with SMTP id bb3mr129612097plb.56.1561405756403; Mon, 24 Jun 2019 12:49:16 -0700 (PDT) Received: from localhost.localdomain ([2601:1c2:680:1319:692:26ff:feda:3a81]) by smtp.gmail.com with ESMTPSA id v3sm7957031pfm.188.2019.06.24.12.49.13 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 24 Jun 2019 12:49:15 -0700 (PDT) From: John Stultz To: lkml Subject: [PATCH v6 1/5] dma-buf: Add dma-buf heaps framework Date: Mon, 24 Jun 2019 19:49:04 +0000 Message-Id: <20190624194908.121273-2-john.stultz@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190624194908.121273-1-john.stultz@linaro.org> References: <20190624194908.121273-1-john.stultz@linaro.org> X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=HQT2ehGsL5kd7tOQ+U6F0I0APeClDhTVyE+CVJ72CkQ=; b=YxC72aSZX4B4NzAnbyQ8aUKrAaxduQLXwx9LkSbEKRT3zMMOE+JpBoTYE3yP3hp+GA AJMYlwowTw/PR4Ls/fOXn3hGGqNDWnfHb1FO5xr1KUEThPWr7hGiJOFjdOKHNHvpdhlq 2It5BPUx28/CQhe7kaIya7Y1VmCyth+9lZN9EexsWelhmrSJXEmGuiXShw3eIn5rFgQE e0s0BZCCXaMkMgPORf2O5exhO2aX+S+wfpeKxN890PtR95S347p1MsNkuCf0Tc0+jQJd 4hHFKUscIE/MXo/pEd/AJDhv08uoqn93l7fjorSEiaeWrl0DT7VlKudHnicJf8yJigPj foSg== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Yudongbin , Xu YiPing , Sudipto Paul , Vincent Donnefort , "Chenfeng \(puck\)" , dri-devel@lists.freedesktop.org, Chenbo Feng , Alistair Strachan , Liam Mark , "Andrew F. Davis" , Christoph Hellwig , "Xiaqing \(A\)" , Pratik Patel , butao MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: "Andrew F. Davis" This framework allows a unified userspace interface for dma-buf exporters, allowing userland to allocate specific types of memory for use in dma-buf sharing. Each heap is given its own device node, which a user can allocate a dma-buf fd from using the DMA_HEAP_IOC_ALLOC. This code is an evoluiton of the Android ION implementation, and a big thanks is due to its authors/maintainers over time for their effort: Rebecca Schultz Zavin, Colin Cross, Benjamin Gaignard, Laura Abbott, and many other contributors! Cc: Laura Abbott Cc: Benjamin Gaignard Cc: Sumit Semwal Cc: Liam Mark Cc: Pratik Patel Cc: Brian Starkey Cc: Vincent Donnefort Cc: Sudipto Paul Cc: Andrew F. Davis Cc: Xu YiPing Cc: "Chenfeng (puck)" Cc: butao Cc: "Xiaqing (A)" Cc: Yudongbin Cc: Christoph Hellwig Cc: Chenbo Feng Cc: Alistair Strachan Cc: dri-devel@lists.freedesktop.org Reviewed-by: Benjamin Gaignard Signed-off-by: Andrew F. Davis Signed-off-by: John Stultz Change-Id: I4af43a137ad34ff6f7da4d6b2864f3cd86fb7652 --- v2: * Folded down fixes I had previously shared in implementing heaps * Make flags a u64 (Suggested by Laura) * Add PAGE_ALIGN() fix to the core alloc funciton * IOCTL fixups suggested by Brian * Added fixes suggested by Benjamin * Removed core stats mgmt, as that should be implemented by per-heap code * Changed alloc to return a dma-buf fd, rather than a buffer (as it simplifies error handling) v3: * Removed scare-quotes in MAINTAINERS email address * Get rid of .release function as it didn't do anything (from Christoph) * Renamed filp to file (suggested by Christoph) * Split out ioctl handling to separate function (suggested by Christoph) * Add comment documenting PAGE_ALIGN usage (suggested by Brian) * Switch from idr to Xarray (suggested by Brian) * Fixup cdev creation (suggested by Brian) * Avoid EXPORT_SYMBOL until we finalize modules (suggested by Brian) * Make struct dma_heap internal only (folded in from Andrew) * Small cleanups suggested by GregKH * Provide class->devnode callback to get consistent /dev/ subdirectory naming (Suggested by Bjorn) v4: * Folded down dma-heap.h change that was in a following patch * Added fd_flags entry to allocation structure and pass it through to heap code for use on dma-buf fd creation (suggested by Benjamin) v5: * Minor cleanups v6: * Improved error path handling, minor whitespace fixes, both suggested by Brian --- MAINTAINERS | 18 +++ drivers/dma-buf/Kconfig | 8 ++ drivers/dma-buf/Makefile | 1 + drivers/dma-buf/dma-heap.c | 249 ++++++++++++++++++++++++++++++++++ include/linux/dma-heap.h | 59 ++++++++ include/uapi/linux/dma-heap.h | 55 ++++++++ 6 files changed, 390 insertions(+) create mode 100644 drivers/dma-buf/dma-heap.c create mode 100644 include/linux/dma-heap.h create mode 100644 include/uapi/linux/dma-heap.h diff --git a/MAINTAINERS b/MAINTAINERS index d0ed735994a5..851dbd006cdf 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4813,6 +4813,24 @@ F: include/linux/*fence.h F: Documentation/driver-api/dma-buf.rst T: git git://anongit.freedesktop.org/drm/drm-misc +DMA-BUF HEAPS FRAMEWORK +M: Sumit Semwal +R: Andrew F. Davis +R: Benjamin Gaignard +R: Liam Mark +R: Laura Abbott +R: Brian Starkey +R: John Stultz +S: Maintained +L: linux-media@vger.kernel.org +L: dri-devel@lists.freedesktop.org +L: linaro-mm-sig@lists.linaro.org (moderated for non-subscribers) +F: include/uapi/linux/dma-heap.h +F: include/linux/dma-heap.h +F: drivers/dma-buf/dma-heap.c +F: drivers/dma-buf/heaps/* +T: git git://anongit.freedesktop.org/drm/drm-misc + DMA GENERIC OFFLOAD ENGINE SUBSYSTEM M: Vinod Koul L: dmaengine@vger.kernel.org diff --git a/drivers/dma-buf/Kconfig b/drivers/dma-buf/Kconfig index d5f915830b68..9b93f86f597c 100644 --- a/drivers/dma-buf/Kconfig +++ b/drivers/dma-buf/Kconfig @@ -39,4 +39,12 @@ config UDMABUF A driver to let userspace turn memfd regions into dma-bufs. Qemu can use this to create host dmabufs for guest framebuffers. +menuconfig DMABUF_HEAPS + bool "DMA-BUF Userland Memory Heaps" + select DMA_SHARED_BUFFER + help + Choose this option to enable the DMA-BUF userland memory heaps, + this allows userspace to allocate dma-bufs that can be shared between + drivers. + endmenu diff --git a/drivers/dma-buf/Makefile b/drivers/dma-buf/Makefile index e8c7310cb800..1cb3dd104825 100644 --- a/drivers/dma-buf/Makefile +++ b/drivers/dma-buf/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only obj-y := dma-buf.o dma-fence.o dma-fence-array.o dma-fence-chain.o \ reservation.o seqno-fence.o +obj-$(CONFIG_DMABUF_HEAPS) += dma-heap.o obj-$(CONFIG_SYNC_FILE) += sync_file.o obj-$(CONFIG_SW_SYNC) += sw_sync.o sync_debug.o obj-$(CONFIG_UDMABUF) += udmabuf.o diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c new file mode 100644 index 000000000000..e44de7f69611 --- /dev/null +++ b/drivers/dma-buf/dma-heap.c @@ -0,0 +1,249 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Framework for userspace DMA-BUF allocations + * + * Copyright (C) 2011 Google, Inc. + * Copyright (C) 2019 Linaro Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DEVNAME "dma_heap" + +#define NUM_HEAP_MINORS 128 + +/** + * struct dma_heap - represents a dmabuf heap in the system + * @name: used for debugging/device-node name + * @ops: ops struct for this heap + * @minor minor number of this heap device + * @heap_devt heap device node + * @heap_cdev heap char device + * + * Represents a heap of memory from which buffers can be made. + */ +struct dma_heap { + const char *name; + struct dma_heap_ops *ops; + void *priv; + unsigned int minor; + dev_t heap_devt; + struct cdev heap_cdev; +}; + +static dev_t dma_heap_devt; +static struct class *dma_heap_class; +static DEFINE_XARRAY_ALLOC(dma_heap_minors); + +static int dma_heap_buffer_alloc(struct dma_heap *heap, size_t len, + unsigned int fd_flags, + unsigned int heap_flags) +{ + /* + * Allocations from all heaps have to begin + * and end on page boundaries. + */ + len = PAGE_ALIGN(len); + if (!len) + return -EINVAL; + + return heap->ops->allocate(heap, len, fd_flags, heap_flags); +} + +static int dma_heap_open(struct inode *inode, struct file *file) +{ + struct dma_heap *heap; + + heap = xa_load(&dma_heap_minors, iminor(inode)); + if (!heap) { + pr_err("dma_heap: minor %d unknown.\n", iminor(inode)); + return -ENODEV; + } + + /* instance data as context */ + file->private_data = heap; + nonseekable_open(inode, file); + + return 0; +} + +static long dma_heap_ioctl_allocate(struct file *file, unsigned long arg) +{ + struct dma_heap_allocation_data heap_allocation; + struct dma_heap *heap = file->private_data; + int fd; + + if (copy_from_user(&heap_allocation, (void __user *)arg, + sizeof(heap_allocation))) + return -EFAULT; + + if (heap_allocation.fd || + heap_allocation.reserved0 || + heap_allocation.reserved1) { + pr_warn_once("dma_heap: ioctl data not valid\n"); + return -EINVAL; + } + + if (heap_allocation.fd_flags & ~DMA_HEAP_VALID_FD_FLAGS) { + pr_warn_once("dma_heap: fd_flags has invalid or unsupported flags set\n"); + return -EINVAL; + } + + if (heap_allocation.heap_flags & ~DMA_HEAP_VALID_HEAP_FLAGS) { + pr_warn_once("dma_heap: heap flags has invalid or unsupported flags set\n"); + return -EINVAL; + } + + + fd = dma_heap_buffer_alloc(heap, heap_allocation.len, + heap_allocation.fd_flags, + heap_allocation.heap_flags); + if (fd < 0) + return fd; + + heap_allocation.fd = fd; + + if (copy_to_user((void __user *)arg, &heap_allocation, + sizeof(heap_allocation))) { + ksys_close(fd); + return -EFAULT; + } + + return 0; +} + +static long dma_heap_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) +{ + int ret = 0; + + switch (cmd) { + case DMA_HEAP_IOC_ALLOC: + ret = dma_heap_ioctl_allocate(file, arg); + break; + default: + return -ENOTTY; + } + + return ret; +} + +static const struct file_operations dma_heap_fops = { + .owner = THIS_MODULE, + .open = dma_heap_open, + .unlocked_ioctl = dma_heap_ioctl, +}; + +/** + * dma_heap_get_data() - get per-subdriver data for the heap + * @heap: DMA-Heap to retrieve private data for + * + * Returns: + * The per-subdriver data for the heap. + */ +void *dma_heap_get_data(struct dma_heap *heap) +{ + return heap->priv; +} + +struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info) +{ + struct dma_heap *heap, *err_ret; + struct device *dev_ret; + int ret; + + if (!exp_info->name || !strcmp(exp_info->name, "")) { + pr_err("dma_heap: Cannot add heap without a name\n"); + return ERR_PTR(-EINVAL); + } + + if (!exp_info->ops || !exp_info->ops->allocate) { + pr_err("dma_heap: Cannot add heap with invalid ops struct\n"); + return ERR_PTR(-EINVAL); + } + + heap = kzalloc(sizeof(*heap), GFP_KERNEL); + if (!heap) + return ERR_PTR(-ENOMEM); + + heap->name = exp_info->name; + heap->ops = exp_info->ops; + heap->priv = exp_info->priv; + + /* Find unused minor number */ + ret = xa_alloc(&dma_heap_minors, &heap->minor, heap, + XA_LIMIT(0, NUM_HEAP_MINORS - 1), GFP_KERNEL); + if (ret < 0) { + pr_err("dma_heap: Unable to get minor number for heap\n"); + err_ret = ERR_PTR(ret); + goto err0; + } + + /* Create device */ + heap->heap_devt = MKDEV(MAJOR(dma_heap_devt), heap->minor); + + cdev_init(&heap->heap_cdev, &dma_heap_fops); + ret = cdev_add(&heap->heap_cdev, heap->heap_devt, 1); + if (ret < 0) { + pr_err("dma_heap: Unable to add char device\n"); + err_ret = ERR_PTR(ret); + goto err1; + } + + dev_ret = device_create(dma_heap_class, + NULL, + heap->heap_devt, + NULL, + heap->name); + if (IS_ERR(dev_ret)) { + pr_err("dma_heap: Unable to create device\n"); + err_ret = (struct dma_heap *)dev_ret; + goto err2; + } + + return heap; + +err2: + cdev_del(&heap->heap_cdev); +err1: + xa_erase(&dma_heap_minors, heap->minor); +err0: + kfree(heap); + return err_ret; + +} + +static char *dma_heap_devnode(struct device *dev, umode_t *mode) +{ + return kasprintf(GFP_KERNEL, "dma_heap/%s", dev_name(dev)); +} + +static int dma_heap_init(void) +{ + int ret; + + ret = alloc_chrdev_region(&dma_heap_devt, 0, NUM_HEAP_MINORS, DEVNAME); + if (ret) + return ret; + + dma_heap_class = class_create(THIS_MODULE, DEVNAME); + if (IS_ERR(dma_heap_class)) { + unregister_chrdev_region(dma_heap_devt, NUM_HEAP_MINORS); + return PTR_ERR(dma_heap_class); + } + dma_heap_class->devnode = dma_heap_devnode; + + return 0; +} +subsys_initcall(dma_heap_init); diff --git a/include/linux/dma-heap.h b/include/linux/dma-heap.h new file mode 100644 index 000000000000..7a1b633ac02f --- /dev/null +++ b/include/linux/dma-heap.h @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * DMABUF Heaps Allocation Infrastructure + * + * Copyright (C) 2011 Google, Inc. + * Copyright (C) 2019 Linaro Ltd. + */ + +#ifndef _DMA_HEAPS_H +#define _DMA_HEAPS_H + +#include +#include + +struct dma_heap; + +/** + * struct dma_heap_ops - ops to operate on a given heap + * @allocate: allocate dmabuf and return fd + * + * allocate returns dmabuf fd on success, -errno on error. + */ +struct dma_heap_ops { + int (*allocate)(struct dma_heap *heap, + unsigned long len, + unsigned long fd_flags, + unsigned long heap_flags); +}; + +/** + * struct dma_heap_export_info - information needed to export a new dmabuf heap + * @name: used for debugging/device-node name + * @ops: ops struct for this heap + * @priv: heap exporter private data + * + * Information needed to export a new dmabuf heap. + */ +struct dma_heap_export_info { + const char *name; + struct dma_heap_ops *ops; + void *priv; +}; + +/** + * dma_heap_get_data() - get per-heap driver data + * @heap: DMA-Heap to retrieve private data for + * + * Returns: + * The per-heap data for the heap. + */ +void *dma_heap_get_data(struct dma_heap *heap); + +/** + * dma_heap_add - adds a heap to dmabuf heaps + * @exp_info: information needed to register this heap + */ +struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info); + +#endif /* _DMA_HEAPS_H */ diff --git a/include/uapi/linux/dma-heap.h b/include/uapi/linux/dma-heap.h new file mode 100644 index 000000000000..6ce5cc68d238 --- /dev/null +++ b/include/uapi/linux/dma-heap.h @@ -0,0 +1,55 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +/* + * DMABUF Heaps Userspace API + * + * Copyright (C) 2011 Google, Inc. + * Copyright (C) 2019 Linaro Ltd. + */ +#ifndef _UAPI_LINUX_DMABUF_POOL_H +#define _UAPI_LINUX_DMABUF_POOL_H + +#include +#include + +/** + * DOC: DMABUF Heaps Userspace API + */ + +/* Valid FD_FLAGS are O_CLOEXEC, O_RDONLY, O_WRONLY, O_RDWR */ +#define DMA_HEAP_VALID_FD_FLAGS (O_CLOEXEC | O_ACCMODE) + +/* Currently no heap flags */ +#define DMA_HEAP_VALID_HEAP_FLAGS (0) + +/** + * struct dma_heap_allocation_data - metadata passed from userspace for + * allocations + * @len: size of the allocation + * @fd: will be populated with a fd which provdes the + * handle to the allocated dma-buf + * @fd_flags: file descriptor flags used when allocating + * @heap_flags: flags passed to heap + * + * Provided by userspace as an argument to the ioctl + */ +struct dma_heap_allocation_data { + __u64 len; + __u32 fd; + __u32 fd_flags; + __u64 heap_flags; + __u32 reserved0; + __u32 reserved1; +}; + +#define DMA_HEAP_IOC_MAGIC 'H' + +/** + * DOC: DMA_HEAP_IOC_ALLOC - allocate memory from pool + * + * Takes an dma_heap_allocation_data struct and returns it with the fd field + * populated with the dmabuf handle of the allocation. + */ +#define DMA_HEAP_IOC_ALLOC _IOWR(DMA_HEAP_IOC_MAGIC, 0, \ + struct dma_heap_allocation_data) + +#endif /* _UAPI_LINUX_DMABUF_POOL_H */ From patchwork Mon Jun 24 19:49:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 11014049 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7CFD613AF for ; Mon, 24 Jun 2019 19:49:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6EE18288BD for ; Mon, 24 Jun 2019 19:49:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 62F7428A89; Mon, 24 Jun 2019 19:49:24 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8C134288BD for ; Mon, 24 Jun 2019 19:49:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0943A89700; Mon, 24 Jun 2019 19:49:21 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-pg1-x543.google.com (mail-pg1-x543.google.com [IPv6:2607:f8b0:4864:20::543]) by gabe.freedesktop.org (Postfix) with ESMTPS id 489A489612 for ; Mon, 24 Jun 2019 19:49:19 +0000 (UTC) Received: by mail-pg1-x543.google.com with SMTP id 196so7665020pgc.6 for ; Mon, 24 Jun 2019 12:49:19 -0700 (PDT) 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=ImGT/RYfIwkVeKcevhBFy+DosfaXfO541YHID3itWtM=; b=b7ai5UZgLOBe0xGXg9zrYVVCF1XTIOsNSNCjjXR0gXqjoiSMz8u4ClP5WfMzA8ozHf QpQn/KjYsBjepcSzZ8O8lcj0OXaPrDroVlXigsdtxFnVMmuHFMB6njzaIaNuS0alstNN 8oGxBmk5W42CAEcxaHUnwnfX4lvtBJLNu2w6/5hVpYpPPNEJAUzX3sd+8T8JtHWPPzIy FgKSoqliFV7WnyKJTXufDj1GCEje5PI5di3CmKFBa8o8ug5FPC+p+B7gB95CUt1lHqdb nFpIMPa801m1ZWTXR5VwFBPGFpxRyJKCHzB+Chg1KQQIZFJsYTaGH7E57oLt1IkK7hmr 38mg== X-Gm-Message-State: APjAAAUm6alpVBYdFmHf76oTHT8diTLNwX1p8X3iZHnirgKs7exHzisv 63CnCnd7rktcOKCl+IvkGqszmBXYi5s= X-Google-Smtp-Source: APXvYqzYzW2MbLf5j7s2EnV9yXdQfDtROWmXRGP5Gb7Mg6WFQoLIT7Za6gCW7O6XtPigFVvWJJlXpA== X-Received: by 2002:a17:90a:214e:: with SMTP id a72mr27617457pje.0.1561405758711; Mon, 24 Jun 2019 12:49:18 -0700 (PDT) Received: from localhost.localdomain ([2601:1c2:680:1319:692:26ff:feda:3a81]) by smtp.gmail.com with ESMTPSA id v3sm7957031pfm.188.2019.06.24.12.49.16 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 24 Jun 2019 12:49:17 -0700 (PDT) From: John Stultz To: lkml Subject: [PATCH v6 2/5] dma-buf: heaps: Add heap helpers Date: Mon, 24 Jun 2019 19:49:05 +0000 Message-Id: <20190624194908.121273-3-john.stultz@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190624194908.121273-1-john.stultz@linaro.org> References: <20190624194908.121273-1-john.stultz@linaro.org> X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=ImGT/RYfIwkVeKcevhBFy+DosfaXfO541YHID3itWtM=; b=K2cEKL428RjFQQhy0jJ4MPXqCg1bYhJemOQGffAiTDMKcib6WNLk9yqH0b6tv2eL08 MUVzXi2qPzSyy7lWHu2BMVR/Vl+cQRManWokku18IbZPhQtzJQBeh3Kqa8ZeJ3Z6MPkB W0s7ozufT5+GutJWnNvG3Uh5fBTe3eI5wUv8oawRScSDcgRhsnsTGq6VPAknIHxu9SBa scijkqITNcudaxkRuNO9JGuAlzymR+sx9H8zJSj8kYZgJ4fmlGJQHRqtA5evVYuZlJci gGGi9SjWR/q/iGFOjB/YgaFt2YtLqlbbP35wWdW34+kvztHCS0HR0lV8WA73e72qtLuH PEAQ== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Yudongbin , Sudipto Paul , Xu YiPing , Vincent Donnefort , "Chenfeng \(puck\)" , dri-devel@lists.freedesktop.org, Chenbo Feng , Alistair Strachan , Liam Mark , Christoph Hellwig , "Xiaqing \(A\)" , "Andrew F . Davis" , Pratik Patel , butao MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Add generic helper dmabuf ops for dma heaps, so we can reduce the amount of duplicative code for the exported dmabufs. This code is an evolution of the Android ION implementation, so thanks to its original authors and maintainters: Rebecca Schultz Zavin, Colin Cross, Laura Abbott, and others! Cc: Laura Abbott Cc: Benjamin Gaignard Cc: Sumit Semwal Cc: Liam Mark Cc: Pratik Patel Cc: Brian Starkey Cc: Vincent Donnefort Cc: Sudipto Paul Cc: Andrew F. Davis Cc: Xu YiPing Cc: "Chenfeng (puck)" Cc: butao Cc: "Xiaqing (A)" Cc: Yudongbin Cc: Christoph Hellwig Cc: Chenbo Feng Cc: Alistair Strachan Cc: dri-devel@lists.freedesktop.org Reviewed-by: Benjamin Gaignard Signed-off-by: John Stultz Change-Id: I48d43656e7783f266d877e363116b5187639f996 --- v2: * Removed cache management performance hack that I had accidentally folded in. * Removed stats code that was in helpers * Lots of checkpatch cleanups v3: * Uninline INIT_HEAP_HELPER_BUFFER (suggested by Christoph) * Switch to WARN on buffer destroy failure (suggested by Brian) * buffer->kmap_cnt decrementing cleanup (suggested by Christoph) * Extra buffer->vaddr checking in dma_heap_dma_buf_kmap (suggested by Brian) * Switch to_helper_buffer from macro to inline function (suggested by Benjamin) * Rename kmap->vmap (folded in from Andrew) * Use vmap for vmapping - not begin_cpu_access (folded in from Andrew) * Drop kmap for now, as its optional (folded in from Andrew) * Fold dma_heap_map_user into the single caller (foled in from Andrew) * Folded in patch from Andrew to track page list per heap not sglist, which simplifies the tracking logic v4: * Moved dma-heap.h change out to previous patch v6: * Minor cleanups and typo fixes suggested by Brian --- drivers/dma-buf/Makefile | 1 + drivers/dma-buf/heaps/Makefile | 2 + drivers/dma-buf/heaps/heap-helpers.c | 262 +++++++++++++++++++++++++++ drivers/dma-buf/heaps/heap-helpers.h | 54 ++++++ 4 files changed, 319 insertions(+) create mode 100644 drivers/dma-buf/heaps/Makefile create mode 100644 drivers/dma-buf/heaps/heap-helpers.c create mode 100644 drivers/dma-buf/heaps/heap-helpers.h diff --git a/drivers/dma-buf/Makefile b/drivers/dma-buf/Makefile index 1cb3dd104825..e3e3dca29e46 100644 --- a/drivers/dma-buf/Makefile +++ b/drivers/dma-buf/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only obj-y := dma-buf.o dma-fence.o dma-fence-array.o dma-fence-chain.o \ reservation.o seqno-fence.o +obj-$(CONFIG_DMABUF_HEAPS) += heaps/ obj-$(CONFIG_DMABUF_HEAPS) += dma-heap.o obj-$(CONFIG_SYNC_FILE) += sync_file.o obj-$(CONFIG_SW_SYNC) += sw_sync.o sync_debug.o diff --git a/drivers/dma-buf/heaps/Makefile b/drivers/dma-buf/heaps/Makefile new file mode 100644 index 000000000000..de49898112db --- /dev/null +++ b/drivers/dma-buf/heaps/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-y += heap-helpers.o diff --git a/drivers/dma-buf/heaps/heap-helpers.c b/drivers/dma-buf/heaps/heap-helpers.c new file mode 100644 index 000000000000..fba1895f3bf0 --- /dev/null +++ b/drivers/dma-buf/heaps/heap-helpers.c @@ -0,0 +1,262 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include +#include +#include +#include + +#include "heap-helpers.h" + +void INIT_HEAP_HELPER_BUFFER(struct heap_helper_buffer *buffer, + void (*free)(struct heap_helper_buffer *)) +{ + buffer->private_flags = 0; + buffer->priv_virt = NULL; + mutex_init(&buffer->lock); + buffer->vmap_cnt = 0; + buffer->vaddr = NULL; + buffer->pagecount = 0; + buffer->pages = NULL;; + INIT_LIST_HEAD(&buffer->attachments); + buffer->free = free; +} + +static void *dma_heap_map_kernel(struct heap_helper_buffer *buffer) +{ + void *vaddr; + + vaddr = vmap(buffer->pages, buffer->pagecount, VM_MAP, PAGE_KERNEL); + if (!vaddr) + return ERR_PTR(-ENOMEM); + + return vaddr; +} + +static void dma_heap_buffer_destroy(struct dma_heap_buffer *heap_buffer) +{ + struct heap_helper_buffer *buffer = to_helper_buffer(heap_buffer); + + if (buffer->vmap_cnt > 0) { + WARN("%s: buffer still mapped in the kernel\n", + __func__); + vunmap(buffer->vaddr); + } + + buffer->free(buffer); +} + +static void *dma_heap_buffer_vmap_get(struct dma_heap_buffer *heap_buffer) +{ + struct heap_helper_buffer *buffer = to_helper_buffer(heap_buffer); + void *vaddr; + + if (buffer->vmap_cnt) { + buffer->vmap_cnt++; + return buffer->vaddr; + } + vaddr = dma_heap_map_kernel(buffer); + if (WARN_ONCE(!vaddr, + "heap->ops->map_kernel should return ERR_PTR on error")) + return ERR_PTR(-EINVAL); + if (IS_ERR(vaddr)) + return vaddr; + buffer->vaddr = vaddr; + buffer->vmap_cnt++; + return vaddr; +} + +static void dma_heap_buffer_vmap_put(struct dma_heap_buffer *heap_buffer) +{ + struct heap_helper_buffer *buffer = to_helper_buffer(heap_buffer); + + if (!--buffer->vmap_cnt) { + vunmap(buffer->vaddr); + buffer->vaddr = NULL; + } +} + +struct dma_heaps_attachment { + struct device *dev; + struct sg_table table; + struct list_head list; +}; + +static int dma_heap_attach(struct dma_buf *dmabuf, + struct dma_buf_attachment *attachment) +{ + struct dma_heaps_attachment *a; + struct dma_heap_buffer *heap_buffer = dmabuf->priv; + struct heap_helper_buffer *buffer = to_helper_buffer(heap_buffer); + int ret; + + a = kzalloc(sizeof(*a), GFP_KERNEL); + if (!a) + return -ENOMEM; + + ret = sg_alloc_table_from_pages(&a->table, buffer->pages, + buffer->pagecount, 0, + buffer->pagecount << PAGE_SHIFT, + GFP_KERNEL); + if (ret) { + kfree(a); + return ret; + } + + a->dev = attachment->dev; + INIT_LIST_HEAD(&a->list); + + attachment->priv = a; + + mutex_lock(&buffer->lock); + list_add(&a->list, &buffer->attachments); + mutex_unlock(&buffer->lock); + + return 0; +} + +static void dma_heap_detach(struct dma_buf *dmabuf, + struct dma_buf_attachment *attachment) +{ + struct dma_heaps_attachment *a = attachment->priv; + struct dma_heap_buffer *heap_buffer = dmabuf->priv; + struct heap_helper_buffer *buffer = to_helper_buffer(heap_buffer); + + mutex_lock(&buffer->lock); + list_del(&a->list); + mutex_unlock(&buffer->lock); + + sg_free_table(&a->table); + kfree(a); +} + +static struct sg_table *dma_heap_map_dma_buf( + struct dma_buf_attachment *attachment, + enum dma_data_direction direction) +{ + struct dma_heaps_attachment *a = attachment->priv; + struct sg_table *table; + + table = &a->table; + + if (!dma_map_sg(attachment->dev, table->sgl, table->nents, + direction)) + table = ERR_PTR(-ENOMEM); + return table; +} + +static void dma_heap_unmap_dma_buf(struct dma_buf_attachment *attachment, + struct sg_table *table, + enum dma_data_direction direction) +{ + dma_unmap_sg(attachment->dev, table->sgl, table->nents, direction); +} + +static vm_fault_t dma_heap_vm_fault(struct vm_fault *vmf) +{ + struct vm_area_struct *vma = vmf->vma; + struct heap_helper_buffer *buffer = vma->vm_private_data; + + vmf->page = buffer->pages[vmf->pgoff]; + get_page(vmf->page); + + return 0; +} + +static const struct vm_operations_struct dma_heap_vm_ops = { + .fault = dma_heap_vm_fault, +}; + +static int dma_heap_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma) +{ + struct dma_heap_buffer *heap_buffer = dmabuf->priv; + struct heap_helper_buffer *buffer = to_helper_buffer(heap_buffer); + + if ((vma->vm_flags & (VM_SHARED | VM_MAYSHARE)) == 0) + return -EINVAL; + + vma->vm_ops = &dma_heap_vm_ops; + vma->vm_private_data = buffer; + + return 0; +} + +static void dma_heap_dma_buf_release(struct dma_buf *dmabuf) +{ + struct dma_heap_buffer *buffer = dmabuf->priv; + + dma_heap_buffer_destroy(buffer); +} + +static int dma_heap_dma_buf_begin_cpu_access(struct dma_buf *dmabuf, + enum dma_data_direction direction) +{ + struct dma_heap_buffer *heap_buffer = dmabuf->priv; + struct heap_helper_buffer *buffer = to_helper_buffer(heap_buffer); + struct dma_heaps_attachment *a; + int ret = 0; + + mutex_lock(&buffer->lock); + list_for_each_entry(a, &buffer->attachments, list) { + dma_sync_sg_for_cpu(a->dev, a->table.sgl, a->table.nents, + direction); + } + mutex_unlock(&buffer->lock); + + return ret; +} + +static int dma_heap_dma_buf_end_cpu_access(struct dma_buf *dmabuf, + enum dma_data_direction direction) +{ + struct dma_heap_buffer *heap_buffer = dmabuf->priv; + struct heap_helper_buffer *buffer = to_helper_buffer(heap_buffer); + struct dma_heaps_attachment *a; + + mutex_lock(&buffer->lock); + list_for_each_entry(a, &buffer->attachments, list) { + dma_sync_sg_for_device(a->dev, a->table.sgl, a->table.nents, + direction); + } + mutex_unlock(&buffer->lock); + + return 0; +} + +static void *dma_heap_dma_buf_vmap(struct dma_buf *dmabuf) +{ + struct dma_heap_buffer *heap_buffer = dmabuf->priv; + struct heap_helper_buffer *buffer = to_helper_buffer(heap_buffer); + void *vaddr; + + mutex_lock(&buffer->lock); + vaddr = dma_heap_buffer_vmap_get(heap_buffer); + mutex_unlock(&buffer->lock); + + return vaddr; +} + +static void dma_heap_dma_buf_vunmap(struct dma_buf *dmabuf, void *vaddr) +{ + struct dma_heap_buffer *heap_buffer = dmabuf->priv; + struct heap_helper_buffer *buffer = to_helper_buffer(heap_buffer); + + mutex_lock(&buffer->lock); + dma_heap_buffer_vmap_put(heap_buffer); + mutex_unlock(&buffer->lock); +} + +const struct dma_buf_ops heap_helper_ops = { + .map_dma_buf = dma_heap_map_dma_buf, + .unmap_dma_buf = dma_heap_unmap_dma_buf, + .mmap = dma_heap_mmap, + .release = dma_heap_dma_buf_release, + .attach = dma_heap_attach, + .detach = dma_heap_detach, + .begin_cpu_access = dma_heap_dma_buf_begin_cpu_access, + .end_cpu_access = dma_heap_dma_buf_end_cpu_access, + .vmap = dma_heap_dma_buf_vmap, + .vunmap = dma_heap_dma_buf_vunmap, +}; diff --git a/drivers/dma-buf/heaps/heap-helpers.h b/drivers/dma-buf/heaps/heap-helpers.h new file mode 100644 index 000000000000..7e0a82b11c9e --- /dev/null +++ b/drivers/dma-buf/heaps/heap-helpers.h @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * DMABUF Heaps helper code + * + * Copyright (C) 2011 Google, Inc. + * Copyright (C) 2019 Linaro Ltd. + */ + +#ifndef _HEAP_HELPERS_H +#define _HEAP_HELPERS_H + +#include +#include + +/** + * struct dma_heap_buffer - metadata for a particular buffer + * @heap: back pointer to the heap the buffer came from + * @dmabuf: backing dma-buf for this buffer + * @size: size of the buffer + * @flags: buffer specific flags + */ +struct dma_heap_buffer { + struct dma_heap *heap; + struct dma_buf *dmabuf; + size_t size; + unsigned long flags; +}; + +struct heap_helper_buffer { + struct dma_heap_buffer heap_buffer; + + unsigned long private_flags; + void *priv_virt; + struct mutex lock; + int vmap_cnt; + void *vaddr; + pgoff_t pagecount; + struct page **pages; + struct list_head attachments; + + void (*free)(struct heap_helper_buffer *buffer); +}; + +static inline struct heap_helper_buffer *to_helper_buffer( + struct dma_heap_buffer *h) +{ + return container_of(h, struct heap_helper_buffer, heap_buffer); +} + +void INIT_HEAP_HELPER_BUFFER(struct heap_helper_buffer *buffer, + void (*free)(struct heap_helper_buffer *)); +extern const struct dma_buf_ops heap_helper_ops; + +#endif /* _HEAP_HELPERS_H */ From patchwork Mon Jun 24 19:49:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 11014055 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 80DF313AF for ; Mon, 24 Jun 2019 19:49:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 72BE4288BD for ; Mon, 24 Jun 2019 19:49:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 642E528A89; Mon, 24 Jun 2019 19:49:35 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id BB8A8288BD for ; Mon, 24 Jun 2019 19:49:34 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 03BA589A7A; Mon, 24 Jun 2019 19:49:32 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-pg1-x541.google.com (mail-pg1-x541.google.com [IPv6:2607:f8b0:4864:20::541]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5949E8984D for ; Mon, 24 Jun 2019 19:49:21 +0000 (UTC) Received: by mail-pg1-x541.google.com with SMTP id z75so5059365pgz.5 for ; Mon, 24 Jun 2019 12:49:21 -0700 (PDT) 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=oWVUodEWikobPmP2NxI6TMAts5qOQ2aR1KHWV1qmHaY=; b=cOyQeSWoW7fxdVfBJhMv2eBPELNoh5NiS75gq9FH6K8ZTVR94xYDPyLEPdHUKR9vDV inPJ0T0iRhf+GL4tNHMdDRGWXw2DPpv+9Ts7lZG8aZKHBtxJfBkDBLfzDkL6d9mQAD/8 bT9Rxbdv5SAgt3m6MIpJ/lyXr3+r56iZ8ZfAOtwfVbOgY9eFxLn161kUfvG33LDP7zFL nbZZDRvQzJK9CWnMGT8N1zhbEV8gUxIxcWmis/ufumppYKXxshhEQjAsviCTWaIAccr4 ePojSqLf/4UcCYWKjpXq+BQBRreMfATWRHZpvLzeYZnhwFTtnWhgmICPSe7RoNoeN9ea UK4A== X-Gm-Message-State: APjAAAUWTSAx61lVqtM10O4a0yZ5oRbqByzigbgvlvLw5LspZ7an3Sv4 9DEwFpRmWdkiRzAbEBkbdYpZ1Q== X-Google-Smtp-Source: APXvYqxsUnp1BDfjcABrnn89z0dnV99eBZbZu9ehmgAAHGJhsqkMLcsGy8DN97NIAl5/baVeTn3Rcg== X-Received: by 2002:a17:90a:3210:: with SMTP id k16mr25862830pjb.13.1561405760500; Mon, 24 Jun 2019 12:49:20 -0700 (PDT) Received: from localhost.localdomain ([2601:1c2:680:1319:692:26ff:feda:3a81]) by smtp.gmail.com with ESMTPSA id v3sm7957031pfm.188.2019.06.24.12.49.18 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 24 Jun 2019 12:49:19 -0700 (PDT) From: John Stultz To: lkml Subject: [PATCH v6 3/5] dma-buf: heaps: Add system heap to dmabuf heaps Date: Mon, 24 Jun 2019 19:49:06 +0000 Message-Id: <20190624194908.121273-4-john.stultz@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190624194908.121273-1-john.stultz@linaro.org> References: <20190624194908.121273-1-john.stultz@linaro.org> X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=oWVUodEWikobPmP2NxI6TMAts5qOQ2aR1KHWV1qmHaY=; b=OMGVGMdG7FI2WEBe6paPJXvzmL9umAeCrvt+690kiATXRKWLJnY0k3dSzGGezlHsaL bmlZw4HZwdAw0eQzp+j63SuqCnqzbQW33LtTrRK0CgvIZrzprXcVkL/Gb28w4lvE3wwr unVuDRKjhwJ9RjnOyrxE0AAHhwC6uOh/FkA9J9BoroM39Uy4s6JwOZ9HOHX5nnnBjKuF iyvP82d1AnDoWWAujZJftmexWhbA9zR+QbgWdTtVy6k4cJa5DUm6TSso60NQcsnf+mDH 01K/2riu7EZaFbuXbGKZfMaGuUK8UPeAUjO80EonhjSnTeGJ+TAigZTr8J20Giaf5xW7 5CoQ== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Yudongbin , Sudipto Paul , Xu YiPing , Vincent Donnefort , "Chenfeng \(puck\)" , dri-devel@lists.freedesktop.org, Chenbo Feng , Alistair Strachan , Liam Mark , Christoph Hellwig , "Xiaqing \(A\)" , "Andrew F . Davis" , Pratik Patel , butao MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP This patch adds system heap to the dma-buf heaps framework. This allows applications to get a page-allocator backed dma-buf for non-contiguous memory. This code is an evolution of the Android ION implementation, so thanks to its original authors and maintainters: Rebecca Schultz Zavin, Colin Cross, Laura Abbott, and others! Cc: Laura Abbott Cc: Benjamin Gaignard Cc: Sumit Semwal Cc: Liam Mark Cc: Pratik Patel Cc: Brian Starkey Cc: Vincent Donnefort Cc: Sudipto Paul Cc: Andrew F. Davis Cc: Xu YiPing Cc: "Chenfeng (puck)" Cc: butao Cc: "Xiaqing (A)" Cc: Yudongbin Cc: Christoph Hellwig Cc: Chenbo Feng Cc: Alistair Strachan Cc: dri-devel@lists.freedesktop.org Reviewed-by: Benjamin Gaignard Signed-off-by: John Stultz Change-Id: I4dc5ff54ccb1f7ca3ac8675661114ca33813654b --- v2: * Switch allocate to return dmabuf fd * Simplify init code * Checkpatch fixups * Droped dead system-contig code v3: * Whitespace fixups from Benjamin * Make sure we're zeroing the allocated pages (from Liam) * Use PAGE_ALIGN() consistently (suggested by Brian) * Fold in new registration style from Andrew * Avoid needless dynamic allocation of sys_heap (suggested by Christoph) * Minor cleanups * Folded in changes from Andrew to use simplified page list from the heap helpers v4: * Optimization to allocate pages in chunks, similar to old pagepool code * Use fd_flags when creating dmabuf fd (Suggested by Benjamin) v5: * Back out large order page allocations (was leaking memory, as the page array didn't properly track order size) v6: * Minor whitespace change suggested by Brian * Remove unused variable --- drivers/dma-buf/Kconfig | 2 + drivers/dma-buf/heaps/Kconfig | 6 ++ drivers/dma-buf/heaps/Makefile | 1 + drivers/dma-buf/heaps/system_heap.c | 121 ++++++++++++++++++++++++++++ 4 files changed, 130 insertions(+) create mode 100644 drivers/dma-buf/heaps/Kconfig create mode 100644 drivers/dma-buf/heaps/system_heap.c diff --git a/drivers/dma-buf/Kconfig b/drivers/dma-buf/Kconfig index 9b93f86f597c..434cfe646dad 100644 --- a/drivers/dma-buf/Kconfig +++ b/drivers/dma-buf/Kconfig @@ -47,4 +47,6 @@ menuconfig DMABUF_HEAPS this allows userspace to allocate dma-bufs that can be shared between drivers. +source "drivers/dma-buf/heaps/Kconfig" + endmenu diff --git a/drivers/dma-buf/heaps/Kconfig b/drivers/dma-buf/heaps/Kconfig new file mode 100644 index 000000000000..205052744169 --- /dev/null +++ b/drivers/dma-buf/heaps/Kconfig @@ -0,0 +1,6 @@ +config DMABUF_HEAPS_SYSTEM + bool "DMA-BUF System Heap" + depends on DMABUF_HEAPS + help + Choose this option to enable the system dmabuf heap. The system heap + is backed by pages from the buddy allocator. If in doubt, say Y. diff --git a/drivers/dma-buf/heaps/Makefile b/drivers/dma-buf/heaps/Makefile index de49898112db..d1808eca2581 100644 --- a/drivers/dma-buf/heaps/Makefile +++ b/drivers/dma-buf/heaps/Makefile @@ -1,2 +1,3 @@ # SPDX-License-Identifier: GPL-2.0 obj-y += heap-helpers.o +obj-$(CONFIG_DMABUF_HEAPS_SYSTEM) += system_heap.o diff --git a/drivers/dma-buf/heaps/system_heap.c b/drivers/dma-buf/heaps/system_heap.c new file mode 100644 index 000000000000..6a16806181c2 --- /dev/null +++ b/drivers/dma-buf/heaps/system_heap.c @@ -0,0 +1,121 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * DMABUF System heap exporter + * + * Copyright (C) 2011 Google, Inc. + * Copyright (C) 2019 Linaro Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "heap-helpers.h" + +struct system_heap { + struct dma_heap *heap; +} sys_heap; + +static void system_heap_free(struct heap_helper_buffer *buffer) +{ + pgoff_t pg; + + for (pg = 0; pg < buffer->pagecount; pg++) + __free_page(buffer->pages[pg]); + kfree(buffer->pages); + kfree(buffer); +} + +static int system_heap_allocate(struct dma_heap *heap, + unsigned long len, + unsigned long fd_flags, + unsigned long heap_flags) +{ + struct heap_helper_buffer *helper_buffer; + DEFINE_DMA_BUF_EXPORT_INFO(exp_info); + struct dma_buf *dmabuf; + int ret = -ENOMEM; + pgoff_t pg; + + helper_buffer = kzalloc(sizeof(*helper_buffer), GFP_KERNEL); + if (!helper_buffer) + return -ENOMEM; + + INIT_HEAP_HELPER_BUFFER(helper_buffer, system_heap_free); + helper_buffer->heap_buffer.flags = heap_flags; + helper_buffer->heap_buffer.heap = heap; + helper_buffer->heap_buffer.size = len; + + helper_buffer->pagecount = len / PAGE_SIZE; + helper_buffer->pages = kmalloc_array(helper_buffer->pagecount, + sizeof(*helper_buffer->pages), + GFP_KERNEL); + if (!helper_buffer->pages) { + ret = -ENOMEM; + goto err0; + } + + for (pg = 0; pg < helper_buffer->pagecount; pg++) { + helper_buffer->pages[pg] = alloc_page(GFP_KERNEL | __GFP_ZERO); + if (!helper_buffer->pages[pg]) + goto err1; + } + + /* create the dmabuf */ + exp_info.ops = &heap_helper_ops; + exp_info.size = len; + exp_info.flags = fd_flags; + exp_info.priv = &helper_buffer->heap_buffer; + dmabuf = dma_buf_export(&exp_info); + if (IS_ERR(dmabuf)) { + ret = PTR_ERR(dmabuf); + goto err1; + } + + helper_buffer->heap_buffer.dmabuf = dmabuf; + + ret = dma_buf_fd(dmabuf, fd_flags); + if (ret < 0) { + dma_buf_put(dmabuf); + /* just return, as put will call release and that will free */ + return ret; + } + + return ret; + +err1: + while (pg > 0) + __free_page(helper_buffer->pages[--pg]); + kfree(helper_buffer->pages); +err0: + kfree(helper_buffer); + + return -ENOMEM; +} + +static struct dma_heap_ops system_heap_ops = { + .allocate = system_heap_allocate, +}; + +static int system_heap_create(void) +{ + struct dma_heap_export_info exp_info; + int ret = 0; + + exp_info.name = "system_heap"; + exp_info.ops = &system_heap_ops; + exp_info.priv = &sys_heap; + + sys_heap.heap = dma_heap_add(&exp_info); + if (IS_ERR(sys_heap.heap)) + ret = PTR_ERR(sys_heap.heap); + + return ret; +} +device_initcall(system_heap_create); From patchwork Mon Jun 24 19:49:07 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 11014053 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 55231112C for ; Mon, 24 Jun 2019 19:49:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 465C1288BD for ; Mon, 24 Jun 2019 19:49:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3AB4628A89; Mon, 24 Jun 2019 19:49:33 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 88006288BD for ; Mon, 24 Jun 2019 19:49:32 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A861C89A61; Mon, 24 Jun 2019 19:49:31 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-pg1-x542.google.com (mail-pg1-x542.google.com [IPv6:2607:f8b0:4864:20::542]) by gabe.freedesktop.org (Postfix) with ESMTPS id EBEA889A14 for ; Mon, 24 Jun 2019 19:49:22 +0000 (UTC) Received: by mail-pg1-x542.google.com with SMTP id f21so7677582pgi.3 for ; Mon, 24 Jun 2019 12:49:22 -0700 (PDT) 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=u/zFUO3yMoIyZsB9cMbMvZRrcD9xaq1bDUjQQ/exCxE=; b=MgiVj0baCk5QofRKi8MVKKxaRgkolSFs2okMrbl1g97wKAj7aKTX8GUEOMr2KkC90t EmLDCCRHJrCYzx7OjTrM4fNnHOrmvgdreBQUdQL4Xq1eycQRmRrVZ/mM+v9pmtXNh5vU cvr6HPQWkeqrdj4oEiGZY/q5Yp5amtP7eSlYVG7hg/KwwXDyjF3zP113pgOZjIlXrLcS 0iKwwSlLE0xjsOQPY9YmQoZODGQ1/3YRm0e97Sngrqr0ORGvYb/WuSulNqD97nA5gGYZ xiip9D1XsDH8uXA+gaKYWaZojXZlm+7bEWczHrp2sgjhIu+MfCIWoHpTfmW1RYWCJ6ft FGQQ== X-Gm-Message-State: APjAAAXjnyGYuEvZipl4B+BOPDJLfafl3qqn2pzmDlBaNGOjohrVhX0W 9xUT6h/dxM2kej6lGi61F5rhow== X-Google-Smtp-Source: APXvYqycDhB2rQp54g7Rc7xbJaAx5qPGV38UCten+IbY5pFy1HfClabiTmWOO99TuWZUa+g7Au/UiA== X-Received: by 2002:a17:90a:8c06:: with SMTP id a6mr27486142pjo.45.1561405762232; Mon, 24 Jun 2019 12:49:22 -0700 (PDT) Received: from localhost.localdomain ([2601:1c2:680:1319:692:26ff:feda:3a81]) by smtp.gmail.com with ESMTPSA id v3sm7957031pfm.188.2019.06.24.12.49.20 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 24 Jun 2019 12:49:21 -0700 (PDT) From: John Stultz To: lkml Subject: [PATCH v6 4/5] dma-buf: heaps: Add CMA heap to dmabuf heaps Date: Mon, 24 Jun 2019 19:49:07 +0000 Message-Id: <20190624194908.121273-5-john.stultz@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190624194908.121273-1-john.stultz@linaro.org> References: <20190624194908.121273-1-john.stultz@linaro.org> X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=u/zFUO3yMoIyZsB9cMbMvZRrcD9xaq1bDUjQQ/exCxE=; b=jUxO4kdUYOs9pshrX+Xan74VySeFQJHDIl+iphGX9Z4AxgeKYs5JJzAHWoc9uHajaL eppVw06SwQ/zRYUha9mPNufPm2QrqOeJ7E53VzhaFmm7e9NN2Tt0D8yJ/B0SAREoQMpG XAImkg1b9BUVu4/U8vKwFLvQw6Uf6RnvfpLKI2yYxGV+yGGnYO8Thqf35mWLhEVkl6bV 7dUkJr4oRjqKdD+cDglUowD6nQoVI7c1PNQikNjo1U1Jo7AuZM3lmW9g5pMobvl4budm Ew/sv5yLARmJmr+yll9NsMxMjZhxeIQeXkKX08G2XBIDhkZ50uxFjL5Auh8pKARz1z13 erhA== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Yudongbin , Sudipto Paul , Xu YiPing , Vincent Donnefort , "Chenfeng \(puck\)" , dri-devel@lists.freedesktop.org, Chenbo Feng , Alistair Strachan , Liam Mark , Christoph Hellwig , "Xiaqing \(A\)" , "Andrew F . Davis" , Pratik Patel , butao MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP This adds a CMA heap, which allows userspace to allocate a dma-buf of contiguous memory out of a CMA region. This code is an evolution of the Android ION implementation, so thanks to its original author and maintainters: Benjamin Gaignard, Laura Abbott, and others! Cc: Laura Abbott Cc: Benjamin Gaignard Cc: Sumit Semwal Cc: Liam Mark Cc: Pratik Patel Cc: Brian Starkey Cc: Vincent Donnefort Cc: Sudipto Paul Cc: Andrew F. Davis Cc: Xu YiPing Cc: "Chenfeng (puck)" Cc: butao Cc: "Xiaqing (A)" Cc: Yudongbin Cc: Christoph Hellwig Cc: Chenbo Feng Cc: Alistair Strachan Cc: dri-devel@lists.freedesktop.org Reviewed-by: Benjamin Gaignard Signed-off-by: John Stultz Change-Id: Ic2b0c5dfc0dbaff5245bd1c50170c64b06c73051 --- v2: * Switch allocate to return dmabuf fd * Simplify init code * Checkpatch fixups v3: * Switch to inline function for to_cma_heap() * Minor cleanups suggested by Brian * Fold in new registration style from Andrew * Folded in changes from Andrew to use simplified page list from the heap helpers v4: * Use the fd_flags when creating dmabuf fd (Suggested by Benjamin) * Use precalculated pagecount (Suggested by Andrew) v6: * Changed variable names to improve clarity, as suggested by Brian --- drivers/dma-buf/heaps/Kconfig | 8 ++ drivers/dma-buf/heaps/Makefile | 1 + drivers/dma-buf/heaps/cma_heap.c | 169 +++++++++++++++++++++++++++++++ 3 files changed, 178 insertions(+) create mode 100644 drivers/dma-buf/heaps/cma_heap.c diff --git a/drivers/dma-buf/heaps/Kconfig b/drivers/dma-buf/heaps/Kconfig index 205052744169..a5eef06c4226 100644 --- a/drivers/dma-buf/heaps/Kconfig +++ b/drivers/dma-buf/heaps/Kconfig @@ -4,3 +4,11 @@ config DMABUF_HEAPS_SYSTEM help Choose this option to enable the system dmabuf heap. The system heap is backed by pages from the buddy allocator. If in doubt, say Y. + +config DMABUF_HEAPS_CMA + bool "DMA-BUF CMA Heap" + depends on DMABUF_HEAPS && DMA_CMA + help + Choose this option to enable dma-buf CMA heap. This heap is backed + by the Contiguous Memory Allocator (CMA). If your system has these + regions, you should say Y here. diff --git a/drivers/dma-buf/heaps/Makefile b/drivers/dma-buf/heaps/Makefile index d1808eca2581..6e54cdec3da0 100644 --- a/drivers/dma-buf/heaps/Makefile +++ b/drivers/dma-buf/heaps/Makefile @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 obj-y += heap-helpers.o obj-$(CONFIG_DMABUF_HEAPS_SYSTEM) += system_heap.o +obj-$(CONFIG_DMABUF_HEAPS_CMA) += cma_heap.o diff --git a/drivers/dma-buf/heaps/cma_heap.c b/drivers/dma-buf/heaps/cma_heap.c new file mode 100644 index 000000000000..d2b10878b60b --- /dev/null +++ b/drivers/dma-buf/heaps/cma_heap.c @@ -0,0 +1,169 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * DMABUF CMA heap exporter + * + * Copyright (C) 2012, 2019 Linaro Ltd. + * Author: for ST-Ericsson. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "heap-helpers.h" + +struct cma_heap { + struct dma_heap *heap; + struct cma *cma; +}; + +static void cma_heap_free(struct heap_helper_buffer *buffer) +{ + struct cma_heap *cma_heap = dma_heap_get_data(buffer->heap_buffer.heap); + unsigned long nr_pages = buffer->pagecount; + struct page *cma_pages = buffer->priv_virt; + + /* free page list */ + kfree(buffer->pages); + /* release memory */ + cma_release(cma_heap->cma, cma_pages, nr_pages); + kfree(buffer); +} + +/* dmabuf heap CMA operations functions */ +static int cma_heap_allocate(struct dma_heap *heap, + unsigned long len, + unsigned long fd_flags, + unsigned long heap_flags) +{ + struct cma_heap *cma_heap = dma_heap_get_data(heap); + struct heap_helper_buffer *helper_buffer; + struct page *cma_pages; + size_t size = PAGE_ALIGN(len); + unsigned long nr_pages = size >> PAGE_SHIFT; + unsigned long align = get_order(size); + DEFINE_DMA_BUF_EXPORT_INFO(exp_info); + struct dma_buf *dmabuf; + int ret = -ENOMEM; + pgoff_t pg; + + if (align > CONFIG_CMA_ALIGNMENT) + align = CONFIG_CMA_ALIGNMENT; + + helper_buffer = kzalloc(sizeof(*helper_buffer), GFP_KERNEL); + if (!helper_buffer) + return -ENOMEM; + + INIT_HEAP_HELPER_BUFFER(helper_buffer, cma_heap_free); + helper_buffer->heap_buffer.flags = heap_flags; + helper_buffer->heap_buffer.heap = heap; + helper_buffer->heap_buffer.size = len; + + cma_pages = cma_alloc(cma_heap->cma, nr_pages, align, false); + if (!cma_pages) + goto free_buf; + + if (PageHighMem(cma_pages)) { + unsigned long nr_clear_pages = nr_pages; + struct page *page = cma_pages; + + while (nr_clear_pages > 0) { + void *vaddr = kmap_atomic(page); + + memset(vaddr, 0, PAGE_SIZE); + kunmap_atomic(vaddr); + page++; + nr_clear_pages--; + } + } else { + memset(page_address(cma_pages), 0, size); + } + + helper_buffer->pagecount = nr_pages; + helper_buffer->pages = kmalloc_array(helper_buffer->pagecount, + sizeof(*helper_buffer->pages), + GFP_KERNEL); + if (!helper_buffer->pages) { + ret = -ENOMEM; + goto free_cma; + } + + for (pg = 0; pg < helper_buffer->pagecount; pg++) { + helper_buffer->pages[pg] = &cma_pages[pg]; + if (!helper_buffer->pages[pg]) + goto free_pages; + } + + /* create the dmabuf */ + exp_info.ops = &heap_helper_ops; + exp_info.size = len; + exp_info.flags = fd_flags; + exp_info.priv = &helper_buffer->heap_buffer; + dmabuf = dma_buf_export(&exp_info); + if (IS_ERR(dmabuf)) { + ret = PTR_ERR(dmabuf); + goto free_pages; + } + + helper_buffer->heap_buffer.dmabuf = dmabuf; + helper_buffer->priv_virt = cma_pages; + + ret = dma_buf_fd(dmabuf, fd_flags); + if (ret < 0) { + dma_buf_put(dmabuf); + /* just return, as put will call release and that will free */ + return ret; + } + + return ret; + +free_pages: + kfree(helper_buffer->pages); +free_cma: + cma_release(cma_heap->cma, cma_pages, nr_pages); +free_buf: + kfree(helper_buffer); + return ret; +} + +static struct dma_heap_ops cma_heap_ops = { + .allocate = cma_heap_allocate, +}; + +static int __add_cma_heap(struct cma *cma, void *data) +{ + struct cma_heap *cma_heap; + struct dma_heap_export_info exp_info; + + cma_heap = kzalloc(sizeof(*cma_heap), GFP_KERNEL); + if (!cma_heap) + return -ENOMEM; + cma_heap->cma = cma; + + exp_info.name = cma_get_name(cma); + exp_info.ops = &cma_heap_ops; + exp_info.priv = cma_heap; + + cma_heap->heap = dma_heap_add(&exp_info); + if (IS_ERR(cma_heap->heap)) { + int ret = PTR_ERR(cma_heap->heap); + + kfree(cma_heap); + return ret; + } + + return 0; +} + +static int add_cma_heaps(void) +{ + cma_for_each_area(__add_cma_heap, NULL); + return 0; +} +device_initcall(add_cma_heaps); From patchwork Mon Jun 24 19:49:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 11014051 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3CCAE13AF for ; Mon, 24 Jun 2019 19:49:29 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2DB45288BD for ; Mon, 24 Jun 2019 19:49:29 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 21C2228A89; Mon, 24 Jun 2019 19:49:29 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 79ECA288BD for ; Mon, 24 Jun 2019 19:49:28 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9B5D989A14; Mon, 24 Jun 2019 19:49:27 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-pf1-x442.google.com (mail-pf1-x442.google.com [IPv6:2607:f8b0:4864:20::442]) by gabe.freedesktop.org (Postfix) with ESMTPS id AA1D389A14 for ; Mon, 24 Jun 2019 19:49:24 +0000 (UTC) Received: by mail-pf1-x442.google.com with SMTP id 19so8114564pfa.4 for ; Mon, 24 Jun 2019 12:49:24 -0700 (PDT) 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=2hSI8EbMMFV4OCju8jPVBwC8bC74JNJP0N5AkdXGFG8=; b=jhxq/CLGDac4ScfvghP22lZR2MK3FgHj5+0CSnmd8PcRtW5UqXpS6xdptJE33hVY+S W0n5ybJhxDrtR4Kc2d3dweBH2rKfWl/QTUZyQJaZdFS2z6sKOeDW0Ne/3k880iNcmKHz zgR5aRWcXGEZdri55V5qMsviAsZcY1k0KNbyQj5bl1gN+bo0ENMLTsMhJ8Z/R4DoGpfw dmZF7VRUAkVQlJWNjSgjuqsGiji94D355E++AOMUmzLBmsJ70ODhe6qHUivMutXrNNMJ 4O/3sF1PH+j7RKJNvX0g+Xjw8mJVauraqvXaAc2RpDMGdm3xfiH4zNjENgwqGpeimejP LiLQ== X-Gm-Message-State: APjAAAX0ZyXDH/WJc/dWWuhxKKm0vGja9UQ5JZw46mL564Bw4/KpG1XH +5Wwhdcv77WSwFmiVBjKJMboyA== X-Google-Smtp-Source: APXvYqz4euNAuhD6FRrwHxg71dXALMoi3gDsa00rimNtHcAF8xHYqr0WyFukBz8MrFTl62EEguvIsQ== X-Received: by 2002:a63:c301:: with SMTP id c1mr34700786pgd.41.1561405763984; Mon, 24 Jun 2019 12:49:23 -0700 (PDT) Received: from localhost.localdomain ([2601:1c2:680:1319:692:26ff:feda:3a81]) by smtp.gmail.com with ESMTPSA id v3sm7957031pfm.188.2019.06.24.12.49.22 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Mon, 24 Jun 2019 12:49:23 -0700 (PDT) From: John Stultz To: lkml Subject: [PATCH v6 5/5] kselftests: Add dma-heap test Date: Mon, 24 Jun 2019 19:49:08 +0000 Message-Id: <20190624194908.121273-6-john.stultz@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190624194908.121273-1-john.stultz@linaro.org> References: <20190624194908.121273-1-john.stultz@linaro.org> X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=2hSI8EbMMFV4OCju8jPVBwC8bC74JNJP0N5AkdXGFG8=; b=HJ8/f17UiYsYKLq92bi4VUN5Un6UE93aX2ImJYs9C+FtSZnvWN4z2rP0bGOrLWjjkF j/4a8+5HXiMEfk/njOZbvIjxs0VMaqOOqA7Y/aEWC+xGsdhv9NjF36z53pmlgNiyr5gs FV07tGXAkkokHDRyQBOonjNjDiOu/uUaZtEbWKibac3KSx24wPcKT7alDpM1fOC5Id2+ COeIR+AFU4kjVjBwqzTKvFwL9hp1shKRUkKVwDkZ870msBn90gxJfHQmzDbqvjXbOIpz dySZHmX54+/bsEA6l9CcUoPYlCoLRsZ6k5qiJcMNiDJ66FvLIQCPcztxqIXab3OMlGOU viAQ== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Yudongbin , Xu YiPing , Vincent Donnefort , "Chenfeng \(puck\)" , dri-devel@lists.freedesktop.org, Chenbo Feng , Alistair Strachan , Liam Mark , Christoph Hellwig , "Xiaqing \(A\)" , "Andrew F . Davis" , Sudipto Paul , Pratik Patel , butao MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Add very trivial allocation and import test for dma-heaps, utilizing the vgem driver as a test importer. A good chunk of this code taken from: tools/testing/selftests/android/ion/ionmap_test.c Originally by Laura Abbott Cc: Benjamin Gaignard Cc: Sumit Semwal Cc: Liam Mark Cc: Pratik Patel Cc: Brian Starkey Cc: Vincent Donnefort Cc: Sudipto Paul Cc: Andrew F. Davis Cc: Xu YiPing Cc: "Chenfeng (puck)" Cc: butao Cc: "Xiaqing (A)" Cc: Yudongbin Cc: Christoph Hellwig Cc: Chenbo Feng Cc: Alistair Strachan Cc: dri-devel@lists.freedesktop.org Reviewed-by: Benjamin Gaignard Signed-off-by: John Stultz Change-Id: Ib98569fdda6378eb086b8092fb5d6bd419b8d431 --- v2: * Switched to use reworked dma-heap apis v3: * Add simple mmap * Utilize dma-buf testdev to test importing v4: * Rework to use vgem * Pass in fd_flags to match interface changes * Skip . and .. dirs v6: * Number of style/cleanups suggested by Brian --- tools/testing/selftests/dmabuf-heaps/Makefile | 9 + .../selftests/dmabuf-heaps/dmabuf-heap.c | 234 ++++++++++++++++++ 2 files changed, 243 insertions(+) create mode 100644 tools/testing/selftests/dmabuf-heaps/Makefile create mode 100644 tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c diff --git a/tools/testing/selftests/dmabuf-heaps/Makefile b/tools/testing/selftests/dmabuf-heaps/Makefile new file mode 100644 index 000000000000..8c4c36e2972d --- /dev/null +++ b/tools/testing/selftests/dmabuf-heaps/Makefile @@ -0,0 +1,9 @@ +# SPDX-License-Identifier: GPL-2.0 +CFLAGS += -static -O3 -Wl,-no-as-needed -Wall +#LDLIBS += -lrt -lpthread -lm + +# these are all "safe" tests that don't modify +# system time or require escalated privileges +TEST_GEN_PROGS = dmabuf-heap + +include ../lib.mk diff --git a/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c new file mode 100644 index 000000000000..1e93b6fbe459 --- /dev/null +++ b/tools/testing/selftests/dmabuf-heaps/dmabuf-heap.c @@ -0,0 +1,234 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + + +#include "../../../../include/uapi/linux/dma-heap.h" + +#define DEVPATH "/dev/dma_heap" + +static int check_vgem(int fd) +{ + drm_version_t version = { 0 }; + char name[5]; + int ret; + + version.name_len = 4; + version.name = name; + + ret = ioctl(fd, DRM_IOCTL_VERSION, &version); + if (ret) + return 0; + + return !strcmp(name, "vgem"); +} + +static int open_vgem(void) +{ + int i, fd; + const char *drmstr = "/dev/dri/card"; + + fd = -1; + for (i = 0; i < 16; i++) { + char name[80]; + + sprintf(name, "%s%u", drmstr, i); + + fd = open(name, O_RDWR); + if (fd < 0) + continue; + + if (!check_vgem(fd)) { + close(fd); + continue; + } else { + break; + } + + } + return fd; +} + +static int import_vgem_fd(int vgem_fd, int dma_buf_fd, uint32_t *handle) +{ + struct drm_prime_handle import_handle = { + .fd = dma_buf_fd, + .flags = 0, + .handle = 0, + }; + int ret; + + ret = ioctl(vgem_fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &import_handle); + if (ret == 0) + *handle = import_handle.handle; + return ret; +} + +static void close_handle(int vgem_fd, uint32_t handle) +{ + struct drm_gem_close close = { + .handle = handle, + }; + + ioctl(vgem_fd, DRM_IOCTL_GEM_CLOSE, &close); +} + + +static int dmabuf_heap_open(char *name) +{ + int ret, fd; + char buf[256]; + + ret = sprintf(buf, "%s/%s", DEVPATH, name); + if (ret < 0) { + printf("sprintf failed!\n"); + return ret; + } + + fd = open(buf, O_RDWR); + if (fd < 0) + printf("open %s failed!\n", buf); + return fd; +} + +static int dmabuf_heap_alloc(int fd, size_t len, unsigned int flags, int *dmabuf_fd) +{ + struct dma_heap_allocation_data data = { + .len = len, + .fd_flags = O_RDWR | O_CLOEXEC, + .heap_flags = flags, + }; + int ret; + + if (dmabuf_fd == NULL) + return -EINVAL; + + ret = ioctl(fd, DMA_HEAP_IOC_ALLOC, &data); + if (ret < 0) + return ret; + *dmabuf_fd = (int)data.fd; + return ret; +} + +static void dmabuf_sync(int fd, int start_stop) +{ + struct dma_buf_sync sync = { + .flags = start_stop | DMA_BUF_SYNC_RW, + }; + int ret; + + ret = ioctl(fd, DMA_BUF_IOCTL_SYNC, &sync); + if (ret) + printf("sync failed %d\n", errno); +} + +#define ONE_MEG (1024*1024) + +static void do_test(char *heap_name) +{ + int heap_fd = -1, dmabuf_fd = -1, importer_fd = -1; + uint32_t handle = 0; + void *p = NULL; + int ret; + + printf("Testing heap: %s\n", heap_name); + + heap_fd = dmabuf_heap_open(heap_name); + if (heap_fd < 0) + return; + + printf("Allocating 1 MEG\n"); + ret = dmabuf_heap_alloc(heap_fd, ONE_MEG, 0, &dmabuf_fd); + if (ret) { + printf("Allocation Failed!\n"); + goto out; + } + /* mmap and write a simple pattern */ + p = mmap(NULL, + ONE_MEG, + PROT_READ | PROT_WRITE, + MAP_SHARED, + dmabuf_fd, + 0); + if (p == MAP_FAILED) { + printf("mmap() failed: %m\n"); + goto out; + } + printf("mmap passed\n"); + + + dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START); + + memset(p, 1, ONE_MEG / 2); + memset((char *)p + ONE_MEG / 2, 0, ONE_MEG / 2); + dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END); + + importer_fd = open_vgem(); + if (importer_fd < 0) { + ret = importer_fd; + printf("Failed to open vgem\n"); + goto out; + } + + ret = import_vgem_fd(importer_fd, dmabuf_fd, &handle); + if (ret < 0) { + printf("Failed to import buffer\n"); + goto out; + } + printf("import passed\n"); + + dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_START); + memset(p, 0xff, ONE_MEG); + dmabuf_sync(dmabuf_fd, DMA_BUF_SYNC_END); + printf("syncs passed\n"); + + close_handle(importer_fd, handle); + +out: + if (p) + munmap(p, ONE_MEG); + if (importer_fd >= 0) + close(importer_fd); + if (dmabuf_fd >= 0) + close(dmabuf_fd); + if (heap_fd >= 0) + close(heap_fd); +} + + +int main(void) +{ + DIR *d; + struct dirent *dir; + + d = opendir(DEVPATH); + if (!d) { + printf("No %s directory?\n", DEVPATH); + return -1; + } + + while ((dir = readdir(d)) != NULL) { + if (!strncmp(dir->d_name, ".", 2)) + continue; + if (!strncmp(dir->d_name, "..", 3)) + continue; + + do_test(dir->d_name); + } + closedir(d); + + return 0; +}