From patchwork Mon Feb 5 20:02:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Leech X-Patchwork-Id: 13546207 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 4931F12881B for ; Mon, 5 Feb 2024 20:03:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707163387; cv=none; b=OIoA6LbOXAD7u7+MMDFQtNlGAhAtHdNxu022olrr5P/KV/n89V5MmKMkd5YXchXqwoLsKVev5SmdtINrGjJpXjr9xFqx8t7HS7mO8HQWSG9h/saWDfSLC4lZkhmOqdZXw3rlTTs4pk4eHg2u1GxILnTsdKTwUizkWz+3buWeRFc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707163387; c=relaxed/simple; bh=/V90lZZSRGXXf05+8SHxHi+6QRtY/DfvuW/SQHQYyIY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=TdzuWjZSN3bj8o6PnWd3myFJxjnxWgoOGgVfUQvJEqsChxr+qSfyd7eqP7sGa7jpv+ulLjxPqs/ZB7RAsM+O978m0HnKxpSnS1qKu/nmNjrzHzYvCKCLHP205ZlHrBEmLZixp80e0g93Xj4oB7OCy6tZeK3JTrFw18ya7zaRg7A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=YL5pZEf4; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="YL5pZEf4" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1707163385; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=dJpKJpfoOFFg221gkKrq7FzbeWyIhT5uB2Ecy/dVoZU=; b=YL5pZEf46RE8Pxc73IZJO3xe5GGvnnabb2cVH2MsYatZvAmRM3z8fRDt381dcPT9uA+wKA Ky2ROJYPU4gCsqTQ86I1Z4DF/E99kIfq0nR4ZeHOJzg7d2GXYjFnOzt/R7EQ6GWvXeNQx9 1w/P0gGu5MnFW2W9rdmbinh78b63pe0= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-187-nVCxjYcQNTC-R1a0ywzJvg-1; Mon, 05 Feb 2024 15:03:02 -0500 X-MC-Unique: nVCxjYcQNTC-R1a0ywzJvg-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 38C93846D6F; Mon, 5 Feb 2024 20:03:01 +0000 (UTC) Received: from rhel-developer-toolbox-latest.redhat.com (unknown [10.2.16.180]) by smtp.corp.redhat.com (Postfix) with ESMTP id E67F55012; Mon, 5 Feb 2024 20:02:59 +0000 (UTC) From: Chris Leech To: Greg Kroah-Hartman , Nilesh Javali Cc: Christoph Hellwig , John Meneghini , Lee Duncan , Mike Christie , Hannes Reinecke , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, GR-QLogic-Storage-Upstream@marvell.com, Simon Horman Subject: [PATCH v6 4/4] uio_dmem_genirq: UIO_MEM_DMA_COHERENT conversion Date: Mon, 5 Feb 2024 12:02:57 -0800 Message-ID: <20240205200257.138376-1-cleech@redhat.com> In-Reply-To: <20240201233400.3394996-5-cleech@redhat.com> References: <20240201233400.3394996-5-cleech@redhat.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.5 Conversion of this driver to use UIO_MEM_DMA_COHERENT for dma_alloc_coherent memory instead of UIO_MEM_PHYS. Signed-off-by: Chris Leech --- v6: fixed single char ',' -> ';' typo drivers/uio/uio_dmem_genirq.c | 22 ++++++++-------------- 1 file changed, 8 insertions(+), 14 deletions(-) diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c index 5313307c2754a..d5f9384df1255 100644 --- a/drivers/uio/uio_dmem_genirq.c +++ b/drivers/uio/uio_dmem_genirq.c @@ -36,7 +36,6 @@ struct uio_dmem_genirq_platdata { struct platform_device *pdev; unsigned int dmem_region_start; unsigned int num_dmem_regions; - void *dmem_region_vaddr[MAX_UIO_MAPS]; struct mutex alloc_lock; unsigned int refcnt; }; @@ -50,7 +49,6 @@ static int uio_dmem_genirq_open(struct uio_info *info, struct inode *inode) { struct uio_dmem_genirq_platdata *priv = info->priv; struct uio_mem *uiomem; - int dmem_region = priv->dmem_region_start; uiomem = &priv->uioinfo->mem[priv->dmem_region_start]; @@ -61,11 +59,8 @@ static int uio_dmem_genirq_open(struct uio_info *info, struct inode *inode) break; addr = dma_alloc_coherent(&priv->pdev->dev, uiomem->size, - (dma_addr_t *)&uiomem->addr, GFP_KERNEL); - if (!addr) { - uiomem->addr = DMEM_MAP_ERROR; - } - priv->dmem_region_vaddr[dmem_region++] = addr; + &uiomem->dma_addr, GFP_KERNEL); + uiomem->addr = addr ? (phys_addr_t) addr : DMEM_MAP_ERROR; ++uiomem; } priv->refcnt++; @@ -80,7 +75,6 @@ static int uio_dmem_genirq_release(struct uio_info *info, struct inode *inode) { struct uio_dmem_genirq_platdata *priv = info->priv; struct uio_mem *uiomem; - int dmem_region = priv->dmem_region_start; /* Tell the Runtime PM code that the device has become idle */ pm_runtime_put_sync(&priv->pdev->dev); @@ -93,13 +87,12 @@ static int uio_dmem_genirq_release(struct uio_info *info, struct inode *inode) while (!priv->refcnt && uiomem < &priv->uioinfo->mem[MAX_UIO_MAPS]) { if (!uiomem->size) break; - if (priv->dmem_region_vaddr[dmem_region]) { - dma_free_coherent(&priv->pdev->dev, uiomem->size, - priv->dmem_region_vaddr[dmem_region], - uiomem->addr); + if (uiomem->addr) { + dma_free_coherent(uiomem->dma_device, uiomem->size, + (void *) uiomem->addr, + uiomem->dma_addr); } uiomem->addr = DMEM_MAP_ERROR; - ++dmem_region; ++uiomem; } @@ -264,7 +257,8 @@ static int uio_dmem_genirq_probe(struct platform_device *pdev) " dynamic and fixed memory regions.\n"); break; } - uiomem->memtype = UIO_MEM_PHYS; + uiomem->memtype = UIO_MEM_DMA_COHERENT; + uiomem->dma_device = &pdev->dev; uiomem->addr = DMEM_MAP_ERROR; uiomem->size = pdata->dynamic_region_sizes[i]; ++uiomem;