From patchwork Tue Nov 10 03:49:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: John Stultz X-Patchwork-Id: 11893151 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 032F31668 for ; Tue, 10 Nov 2020 03:50:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D165720781 for ; Tue, 10 Nov 2020 03:50:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="ufp302/I" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731829AbgKJDuQ (ORCPT ); Mon, 9 Nov 2020 22:50:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46248 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731497AbgKJDtr (ORCPT ); Mon, 9 Nov 2020 22:49:47 -0500 Received: from mail-pf1-x441.google.com (mail-pf1-x441.google.com [IPv6:2607:f8b0:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 222B2C0613CF for ; Mon, 9 Nov 2020 19:49:47 -0800 (PST) Received: by mail-pf1-x441.google.com with SMTP id e7so10142145pfn.12 for ; Mon, 09 Nov 2020 19:49:47 -0800 (PST) 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 :mime-version:content-transfer-encoding; bh=P68wKVWfyCPNBm8l+XiI7Y585elPVzN5iuk0IO/H+/E=; b=ufp302/IxJQeNPSAn/oG0B7slHsqXLhIaqrxmacDetxK4DKaSaXiaobRRXokmFt6qm qVBiUCq58nepS2WX6lx6AMUPPLdPRlE2cNrSjCWFYvv2bj+5PPwPdcJh4X2ARgdmdmtS uB+tiGJJjTHY0lghPGMJNNEQx61kN+m4u8NAcC56BhD8qV3KJGIHmuMhMwY+mXT/A5eD zZy41bECU/98xAKE8mzxpQGAqcK3y6nn7i55dYt12X38Jd4KsuckJ5VDvGHYGiwqp+vb TbPk9/DtMWP8D/E5FIwOvq9LyZX+SG/oVSVIwNtOV9bOTQrK7X4jY7Htq/DpEjxjCKPh TYJQ== 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:mime-version:content-transfer-encoding; bh=P68wKVWfyCPNBm8l+XiI7Y585elPVzN5iuk0IO/H+/E=; b=i5Sw7rCO7zRA8MOBdsXK3Xnrk5gc6PPs/bXGXYEGC9O83NiQBWbAn5S015Jq1lAFAL vPP9S7v95ULFxrcg7BIAgEGksbK94jfvlIHavI7G2g+SNCMV8RIGjNKm69NsXl2mHvud igBS0+Zbql4gsIQSrFOo52mtfiSEHsUMdzWkzPKsqzy6NDGaoTbxT5s1ebfJ39MVTQRf iDZFf+/H9F+sEp8ULb9OPfhzrFyl4fcMR7Ol7+A45b9GW7ZWKe4sjHDFRwXS+IUjTvYU LIkDcY+bR7GKyXqOmys8Ll+CNEw9ro3W1PDzDqBdZlU/O+lmSUvYCeD/R8lb3OjUdBt6 NFxw== X-Gm-Message-State: AOAM530IAEDFlBE3bp8QvaQxpHH09drwpp7H2JuonNfgZo3R0rx6IjFQ TFCTcxJ93PB/feJ4Aj7zZ0ZNDA== X-Google-Smtp-Source: ABdhPJy3C6z8WgvKfa3+iIExPXU/G5Au0PlnF8H64NrwiW6423OfMKUtvdYTjtKk3kZruKsUbgxHxw== X-Received: by 2002:a17:90a:fe07:: with SMTP id ck7mr2868620pjb.212.1604980186664; Mon, 09 Nov 2020 19:49:46 -0800 (PST) Received: from localhost.localdomain ([2601:1c2:680:1319:692:26ff:feda:3a81]) by smtp.gmail.com with ESMTPSA id b4sm12380693pfi.208.2020.11.09.19.49.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Nov 2020 19:49:45 -0800 (PST) From: John Stultz To: lkml Cc: John Stultz , Sumit Semwal , Liam Mark , Laura Abbott , Brian Starkey , Hridya Valsaraju , Suren Baghdasaryan , Sandeep Patil , Daniel Mentz , Chris Goldsworthy , =?utf-8?q?=C3=98rjan_Eide?= , Robin Murphy , Ezequiel Garcia , Simon Ser , James Jones , linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH v5 6/7] dma-buf: dma-heap: Keep track of the heap device struct Date: Tue, 10 Nov 2020 03:49:33 +0000 Message-Id: <20201110034934.70898-7-john.stultz@linaro.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201110034934.70898-1-john.stultz@linaro.org> References: <20201110034934.70898-1-john.stultz@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Keep track of the heap device struct. This will be useful for special DMA allocations and actions. Cc: Sumit Semwal Cc: Liam Mark Cc: Laura Abbott Cc: Brian Starkey Cc: Hridya Valsaraju Cc: Suren Baghdasaryan Cc: Sandeep Patil Cc: Daniel Mentz Cc: Chris Goldsworthy Cc: Ørjan Eide Cc: Robin Murphy Cc: Ezequiel Garcia Cc: Simon Ser Cc: James Jones Cc: linux-media@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Signed-off-by: John Stultz --- drivers/dma-buf/dma-heap.c | 33 +++++++++++++++++++++++++-------- include/linux/dma-heap.h | 9 +++++++++ 2 files changed, 34 insertions(+), 8 deletions(-) diff --git a/drivers/dma-buf/dma-heap.c b/drivers/dma-buf/dma-heap.c index afd22c9dbdcf..72c746755d89 100644 --- a/drivers/dma-buf/dma-heap.c +++ b/drivers/dma-buf/dma-heap.c @@ -30,6 +30,7 @@ * @heap_devt heap device node * @list list head connecting to list of heaps * @heap_cdev heap char device + * @heap_dev heap device struct * * Represents a heap of memory from which buffers can be made. */ @@ -40,6 +41,7 @@ struct dma_heap { dev_t heap_devt; struct list_head list; struct cdev heap_cdev; + struct device *heap_dev; }; static LIST_HEAD(heap_list); @@ -190,10 +192,21 @@ void *dma_heap_get_drvdata(struct dma_heap *heap) return heap->priv; } +/** + * dma_heap_get_dev() - get device struct for the heap + * @heap: DMA-Heap to retrieve device struct from + * + * Returns: + * The device struct for the heap. + */ +struct device *dma_heap_get_dev(struct dma_heap *heap) +{ + return heap->heap_dev; +} + struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info) { struct dma_heap *heap, *h, *err_ret; - struct device *dev_ret; unsigned int minor; int ret; @@ -247,16 +260,20 @@ struct dma_heap *dma_heap_add(const struct dma_heap_export_info *exp_info) goto err1; } - dev_ret = device_create(dma_heap_class, - NULL, - heap->heap_devt, - NULL, - heap->name); - if (IS_ERR(dev_ret)) { + heap->heap_dev = device_create(dma_heap_class, + NULL, + heap->heap_devt, + NULL, + heap->name); + if (IS_ERR(heap->heap_dev)) { pr_err("dma_heap: Unable to create device\n"); - err_ret = ERR_CAST(dev_ret); + err_ret = ERR_CAST(heap->heap_dev); goto err2; } + + /* Make sure it doesn't disappear on us */ + heap->heap_dev = get_device(heap->heap_dev); + /* Add heap to the list */ mutex_lock(&heap_list_lock); list_add(&heap->list, &heap_list); diff --git a/include/linux/dma-heap.h b/include/linux/dma-heap.h index 454e354d1ffb..82857e096910 100644 --- a/include/linux/dma-heap.h +++ b/include/linux/dma-heap.h @@ -50,6 +50,15 @@ struct dma_heap_export_info { */ void *dma_heap_get_drvdata(struct dma_heap *heap); +/** + * dma_heap_get_dev() - get device struct for the heap + * @heap: DMA-Heap to retrieve device struct from + * + * Returns: + * The device struct for the heap. + */ +struct device *dma_heap_get_dev(struct dma_heap *heap); + /** * dma_heap_add - adds a heap to dmabuf heaps * @exp_info: information needed to register this heap