From patchwork Tue Feb 6 10:08:27 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: 13546974 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 0170012DD89; Tue, 6 Feb 2024 10:08:43 +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=1707214124; cv=none; b=RO66sfnI9GNN/0Rk74t0ni5bOqDkSmu/GDr+LPAdzmnpeB8M2K1WqbMf32wgOK2/g0TgiVdvPdKssK/AfmarHJoHt2dhKOnp+1tLMs9AIwrKg/DUQGI0NubHnsFxwUnddAy8TwyTOy0nL8a9KKPBa66+K0xP2gxM86toL5IrILw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707214124; c=relaxed/simple; bh=Jbx9A60oDrS6/ZkaMfuBhDkPhHXF7P3WtJFWzroFwZw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=DMcpVfgiyIWfpvMFDpCatq1LP8RXV0/+fgylgNZR/BZKEJ3EqVfL3aicy4r5xZ/usQr0Ix/VxwnI7FHQ0GpG6n/YK1EgFgbdGtDZYP+uILeZmc+8HZE9F3+yRZlqHSOMvbeZfuKBh7UrmJM6euyHFDDshnNPWlKOWbWZBAVMUhw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=GL7i5kSm; 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="GL7i5kSm" Received: by smtp.kernel.org (Postfix) with ESMTPS id 8F387C43143; Tue, 6 Feb 2024 10:08:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1707214123; bh=Jbx9A60oDrS6/ZkaMfuBhDkPhHXF7P3WtJFWzroFwZw=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=GL7i5kSmCedw7hAiZu0KtABP0+sDdjUsE4dOH/Cj8F71oedtETqZRuH+2q8D/pg3q AUSACOmA07btvIdWmEoQK7SdXlz9eDgnuho9eSfjDDJ+06Q329pTyvyncagM955Y/6 Eztc8FUA2SZ2duyr5KZP19YDezi2SISCcxQY/vkCE84+85cESHRURQ71P+dJU5OaSq Qo+zfdqIcQauogb/CsqZxWDYBOpII6GQZjdO7d6Fn41Z1onWPZxSYGXnYxpPrXZmBj cSYCFIm2VXBJ6pBBaAhS0J4bjL2PexB3Io35AN+wQ54010uIZ1Ue589jqelqJFvZQ7 1YaH/i1FEl3pw== 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 7B41AC4829E; Tue, 6 Feb 2024 10:08:43 +0000 (UTC) From: Nuno Sa via B4 Relay Date: Tue, 06 Feb 2024 11:08:27 +0100 Subject: [PATCH v9 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: <20240206-iio-backend-v9-4-df66d159c000@analog.com> References: <20240206-iio-backend-v9-0-df66d159c000@analog.com> In-Reply-To: <20240206-iio-backend-v9-0-df66d159c000@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=1707214121; l=3896; i=nuno.sa@analog.com; s=20231116; h=from:subject:message-id; bh=6pMFXM0wCdg3Id7C+f0CPli3rW2y13iOegJBdE0KPUQ=; b=ato7X/PKfyCQvU0eWsgxKEkgwdUAcR8Hsy+ZDCNcGbmJd3KhX9x9uWDRcIQIBReqIrjzTpSm+ U2L6cwIlWQbDG7j3fWplyQXcD/I0R+y0vcNRGxaBWrRRHKVU3dkDt7C 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);