From patchwork Sat Feb 10 20:57:16 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nuno Sa via B4 Relay X-Patchwork-Id: 13552333 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EA4745FDB1; Sat, 10 Feb 2024 20:57:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707598642; cv=none; b=SzVsBk/94iPqHab80BJ1yr1OxeZAUekcT0J1qpqVJtWTLAR/lHTK4FhV0Cu0tDqavNekKmabXYcL1Lgnmfx7ujx6KLNBpFrpENVF5/Nl1KCL/HpktdGqFYuWsYcwjQh2FSCxRtOHPqXeMEAhUkeyGfqsMmvq+5IOvwDOLy6Ggqs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707598642; c=relaxed/simple; bh=Jbx9A60oDrS6/ZkaMfuBhDkPhHXF7P3WtJFWzroFwZw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Mi/a78PIgvEhNSlCmmOOizpZFRHAWb1pFBLk4OYPq7D37FBGQ8BlwneCvLzxMQiLmKNuw59NrOYxnizftdJGMToCAS+Kc3IQVcVaHx6OifrJMoXHOpBCcVKEwxbNwavvKreslpFnlNk2gwDEMXLxR734A85kx1hwuukVunXB5rs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SGaarbtn; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="SGaarbtn" Received: by smtp.kernel.org (Postfix) with ESMTPS id 39413C43330; Sat, 10 Feb 2024 20:57:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1707598641; bh=Jbx9A60oDrS6/ZkaMfuBhDkPhHXF7P3WtJFWzroFwZw=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=SGaarbtnkZkH8Kivy8+JML2QRMQ4T+LJ8OOM6B//cw8XK1b5XdcPKFfMkrpMVKtpE hhpEzVzJptb3jefeKEKIoIE6Nv/dnx//5l5YoxVfBjZAvu6xH1pPXhpRilDJtqLq7y u76koG4oWuHAaBQPc2rWfUbXINGdvQNRnHZMGIJ2RqaeZJQQhktVR4Na7G3n67qh5T 6py//QQUPYCOm97Wz1/cAe2zzW5pFNTQgcaN1hp4PGan1fOP+8nxAzZWnhcg7uC0pN i2iq0inkKiIGqOGz+3sSTns8K7jZ+3d7ELuhJv38USiBWtPLLHnsTyCXSZWoAvlCuD 6KFwJloPYoK+A== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16592C48BC1; Sat, 10 Feb 2024 20:57:21 +0000 (UTC) From: Nuno Sa via B4 Relay Date: Sat, 10 Feb 2024 21:57:16 +0100 Subject: [PATCH v11 4/7] iio: buffer-dmaengine: export buffer alloc and free functions Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240210-iio-backend-v11-4-f5242a5fb42a@analog.com> References: <20240210-iio-backend-v11-0-f5242a5fb42a@analog.com> In-Reply-To: <20240210-iio-backend-v11-0-f5242a5fb42a@analog.com> To: linux-iio@vger.kernel.org, devicetree@vger.kernel.org Cc: Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Frank Rowand , Olivier Moysan , andy.shevchenko@gmail.com X-Mailer: b4 0.12.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1707598639; l=3896; i=nuno.sa@analog.com; s=20231116; h=from:subject:message-id; bh=6pMFXM0wCdg3Id7C+f0CPli3rW2y13iOegJBdE0KPUQ=; b=7Hila/t5rPHpCeLUeJ0yCutqdJtJPabhBQuhzt1J/1QDsJJ7mkWLQZ+inQIQXW+zus4qXj/rg ILszxnoJHd8C8GQw8xJ+RavOUEHexsfSldtoEEVWAh5kqINUK6zxWyS X-Developer-Key: i=nuno.sa@analog.com; a=ed25519; pk=3NQwYA013OUYZsmDFBf8rmyyr5iQlxV/9H4/Df83o1E= X-Endpoint-Received: by B4 Relay for nuno.sa@analog.com/20231116 with auth_id=100 X-Original-From: Nuno Sa Reply-To: From: Nuno Sa Export iio_dmaengine_buffer_free() and iio_dmaengine_buffer_alloc(). This is in preparation of introducing IIO backends support. This will allow us to allocate a buffer and control it's lifetime from a device different from the one holding the DMA firmware properties. Effectively, in this case the struct device holding the firmware information about the DMA channels is not the same as iio_dev->dev.parent (typical case). While at it, namespace the buffer-dmaengine exports and update the current user of these buffers. Signed-off-by: Nuno Sa --- drivers/iio/adc/adi-axi-adc.c | 1 + drivers/iio/buffer/industrialio-buffer-dmaengine.c | 8 +++++--- include/linux/iio/buffer-dmaengine.h | 3 +++ 3 files changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c index c247ff1541d2..0f21d1d98b9f 100644 --- a/drivers/iio/adc/adi-axi-adc.c +++ b/drivers/iio/adc/adi-axi-adc.c @@ -447,3 +447,4 @@ module_platform_driver(adi_axi_adc_driver); MODULE_AUTHOR("Michael Hennerich "); MODULE_DESCRIPTION("Analog Devices Generic AXI ADC IP core driver"); MODULE_LICENSE("GPL v2"); +MODULE_IMPORT_NS(IIO_DMAENGINE_BUFFER); diff --git a/drivers/iio/buffer/industrialio-buffer-dmaengine.c b/drivers/iio/buffer/industrialio-buffer-dmaengine.c index 45fe7d0d42ee..a18c1da292af 100644 --- a/drivers/iio/buffer/industrialio-buffer-dmaengine.c +++ b/drivers/iio/buffer/industrialio-buffer-dmaengine.c @@ -159,7 +159,7 @@ static const struct iio_dev_attr *iio_dmaengine_buffer_attrs[] = { * Once done using the buffer iio_dmaengine_buffer_free() should be used to * release it. */ -static struct iio_buffer *iio_dmaengine_buffer_alloc(struct device *dev, +struct iio_buffer *iio_dmaengine_buffer_alloc(struct device *dev, const char *channel) { struct dmaengine_buffer *dmaengine_buffer; @@ -210,6 +210,7 @@ static struct iio_buffer *iio_dmaengine_buffer_alloc(struct device *dev, kfree(dmaengine_buffer); return ERR_PTR(ret); } +EXPORT_SYMBOL_NS_GPL(iio_dmaengine_buffer_alloc, IIO_DMAENGINE_BUFFER); /** * iio_dmaengine_buffer_free() - Free dmaengine buffer @@ -217,7 +218,7 @@ static struct iio_buffer *iio_dmaengine_buffer_alloc(struct device *dev, * * Frees a buffer previously allocated with iio_dmaengine_buffer_alloc(). */ -static void iio_dmaengine_buffer_free(struct iio_buffer *buffer) +void iio_dmaengine_buffer_free(struct iio_buffer *buffer) { struct dmaengine_buffer *dmaengine_buffer = iio_buffer_to_dmaengine_buffer(buffer); @@ -227,6 +228,7 @@ static void iio_dmaengine_buffer_free(struct iio_buffer *buffer) iio_buffer_put(buffer); } +EXPORT_SYMBOL_NS_GPL(iio_dmaengine_buffer_free, IIO_DMAENGINE_BUFFER); static void __devm_iio_dmaengine_buffer_free(void *buffer) { @@ -287,7 +289,7 @@ int devm_iio_dmaengine_buffer_setup(struct device *dev, return iio_device_attach_buffer(indio_dev, buffer); } -EXPORT_SYMBOL_GPL(devm_iio_dmaengine_buffer_setup); +EXPORT_SYMBOL_NS_GPL(devm_iio_dmaengine_buffer_setup, IIO_DMAENGINE_BUFFER); MODULE_AUTHOR("Lars-Peter Clausen "); MODULE_DESCRIPTION("DMA buffer for the IIO framework"); diff --git a/include/linux/iio/buffer-dmaengine.h b/include/linux/iio/buffer-dmaengine.h index 5c355be89814..cbb8ba957fad 100644 --- a/include/linux/iio/buffer-dmaengine.h +++ b/include/linux/iio/buffer-dmaengine.h @@ -10,6 +10,9 @@ struct iio_dev; struct device; +struct iio_buffer *iio_dmaengine_buffer_alloc(struct device *dev, + const char *channel); +void iio_dmaengine_buffer_free(struct iio_buffer *buffer); int devm_iio_dmaengine_buffer_setup(struct device *dev, struct iio_dev *indio_dev, const char *channel);