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From: "Liu, Jing2" <jing2.liu@linux.intel.com>
To: "Michael S. Tsirkin" <mst@redhat.com>,
	Zha Bin <zhabin@linux.alibaba.com>
Cc: linux-kernel@vger.kernel.org, jasowang@redhat.com,
	slp@redhat.com, virtio-dev@lists.oasis-open.org,
	qemu-devel@nongnu.org, gerry@linux.alibaba.com,
	chao.p.peng@linux.intel.com
Subject: Re: [virtio-dev] Re: [PATCH v2 2/5] virtio-mmio: refactor common functionality
Date: Wed, 12 Feb 2020 10:58:13 +0800	[thread overview]
Message-ID: <787bac48-3fd0-316a-a99a-8c93154dc8e2@linux.intel.com> (raw)
In-Reply-To: <20200211061758-mutt-send-email-mst@kernel.org>


On 2/11/2020 7:19 PM, Michael S. Tsirkin wrote:
> On Mon, Feb 10, 2020 at 05:05:18PM +0800, Zha Bin wrote:
>> From: Liu Jiang <gerry@linux.alibaba.com>
>>
>> Common functionality is refactored into virtio_mmio_common.h
>> in order to MSI support in later patch set.
>>
>> Signed-off-by: Liu Jiang <gerry@linux.alibaba.com>
>> Co-developed-by: Zha Bin <zhabin@linux.alibaba.com>
>> Signed-off-by: Zha Bin <zhabin@linux.alibaba.com>
>> Co-developed-by: Jing Liu <jing2.liu@linux.intel.com>
>> Signed-off-by: Jing Liu <jing2.liu@linux.intel.com>
>> Co-developed-by: Chao Peng <chao.p.peng@linux.intel.com>
>> Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
> What does this proliferation of header files achieve?
> common with what?

We're considering that the virtio mmio structure is useful for virtio 
mmio msi file so refactor out.

e.g. to get the base of virtio_mmio_device from struct msi_desc *desc.

Jing


>> ---
>>   drivers/virtio/virtio_mmio.c        | 21 +--------------------
>>   drivers/virtio/virtio_mmio_common.h | 31 +++++++++++++++++++++++++++++++
>>   2 files changed, 32 insertions(+), 20 deletions(-)
>>   create mode 100644 drivers/virtio/virtio_mmio_common.h
>>
>> diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
>> index 1733ab97..41e1c93 100644
>> --- a/drivers/virtio/virtio_mmio.c
>> +++ b/drivers/virtio/virtio_mmio.c
>> @@ -61,13 +61,12 @@
>>   #include <linux/io.h>
>>   #include <linux/list.h>
>>   #include <linux/module.h>
>> -#include <linux/platform_device.h>
>>   #include <linux/slab.h>
>>   #include <linux/spinlock.h>
>> -#include <linux/virtio.h>
>>   #include <linux/virtio_config.h>
>>   #include <uapi/linux/virtio_mmio.h>
>>   #include <linux/virtio_ring.h>
>> +#include "virtio_mmio_common.h"
>>   
>>   
>>   
>> @@ -77,24 +76,6 @@
>>   
>>   
>>   
>> -#define to_virtio_mmio_device(_plat_dev) \
>> -	container_of(_plat_dev, struct virtio_mmio_device, vdev)
>> -
>> -struct virtio_mmio_device {
>> -	struct virtio_device vdev;
>> -	struct platform_device *pdev;
>> -
>> -	void __iomem *base;
>> -	unsigned long version;
>> -
>> -	/* a list of queues so we can dispatch IRQs */
>> -	spinlock_t lock;
>> -	struct list_head virtqueues;
>> -
>> -	unsigned short notify_base;
>> -	unsigned short notify_multiplier;
>> -};
>> -
>>   struct virtio_mmio_vq_info {
>>   	/* the actual virtqueue */
>>   	struct virtqueue *vq;
>> diff --git a/drivers/virtio/virtio_mmio_common.h b/drivers/virtio/virtio_mmio_common.h
>> new file mode 100644
>> index 0000000..90cb304
>> --- /dev/null
>> +++ b/drivers/virtio/virtio_mmio_common.h
>> @@ -0,0 +1,31 @@
>> +/* SPDX-License-Identifier: GPL-2.0-or-later */
>> +#ifndef _DRIVERS_VIRTIO_VIRTIO_MMIO_COMMON_H
>> +#define _DRIVERS_VIRTIO_VIRTIO_MMIO_COMMON_H
>> +/*
>> + * Virtio MMIO driver - common functionality for all device versions
>> + *
>> + * This module allows virtio devices to be used over a memory-mapped device.
>> + */
>> +
>> +#include <linux/platform_device.h>
>> +#include <linux/virtio.h>
>> +
>> +#define to_virtio_mmio_device(_plat_dev) \
>> +	container_of(_plat_dev, struct virtio_mmio_device, vdev)
>> +
>> +struct virtio_mmio_device {
>> +	struct virtio_device vdev;
>> +	struct platform_device *pdev;
>> +
>> +	void __iomem *base;
>> +	unsigned long version;
>> +
>> +	/* a list of queues so we can dispatch IRQs */
>> +	spinlock_t lock;
>> +	struct list_head virtqueues;
>> +
>> +	unsigned short notify_base;
>> +	unsigned short notify_multiplier;
>> +};
>> +
>> +#endif
>> -- 
>> 1.8.3.1
>
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>

  reply	other threads:[~2020-02-12  2:58 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-10  9:05 [PATCH v2 0/5] virtio mmio specification enhancement Zha Bin
2020-02-10  9:05 ` [PATCH v2 1/5] virtio-mmio: add notify feature for per-queue Zha Bin
2020-02-11 10:50   ` Michael S. Tsirkin
2020-02-11 11:33   ` Michael S. Tsirkin
2020-02-12  3:39     ` Jason Wang
2020-02-12  8:18       ` Michael S. Tsirkin
2020-02-12  8:53         ` Jason Wang
2020-02-12  9:33           ` Jason Wang
2020-02-12  9:55             ` Michael S. Tsirkin
2020-02-13  3:38               ` Jason Wang
2020-02-10  9:05 ` [PATCH v2 2/5] virtio-mmio: refactor common functionality Zha Bin
2020-02-11 11:19   ` Michael S. Tsirkin
2020-02-12  2:58     ` Liu, Jing2 [this message]
2020-02-12  7:29       ` [virtio-dev] " Michael S. Tsirkin
2020-02-10  9:05 ` [PATCH v2 3/5] virtio-mmio: create a generic MSI irq domain Zha Bin
2020-02-11 11:16   ` Michael S. Tsirkin
2020-02-12  7:40   ` Michael S. Tsirkin
2020-02-10  9:05 ` [PATCH v2 4/5] virtio-mmio: add MSI interrupt feature support Zha Bin
2020-02-11  3:17   ` Jason Wang
2020-02-11  3:35     ` [virtio-dev] " Liu, Jing2
2020-02-11  4:02       ` Jason Wang
     [not found]         ` <5522f205-207b-b012-6631-3cc77dde3bfe@linux.intel.com>
2020-02-11  7:40           ` Jason Wang
2020-02-11 11:58             ` Michael S. Tsirkin
2020-02-11 12:04               ` Jason Wang
2020-02-11 12:08                 ` Michael S. Tsirkin
2020-02-11 12:18                   ` Jason Wang
2020-02-11 14:00                     ` Michael S. Tsirkin
2020-02-12  9:03                       ` Jason Wang
2020-02-12  9:15                         ` Michael S. Tsirkin
     [not found]             ` <4c19292f-9d25-a859-3dde-6dd5a03fdf0b@linux.intel.com>
2020-02-12  7:33               ` Michael S. Tsirkin
2020-02-12  9:06               ` Jason Wang
2020-02-12  9:16                 ` Michael S. Tsirkin
2020-02-13  3:40                   ` Jason Wang
2020-02-11 11:21       ` Michael S. Tsirkin
2020-02-11 11:11   ` Michael S. Tsirkin
2020-02-10  9:05 ` [PATCH v2 5/5] x86: virtio-mmio: support virtio-mmio with MSI for x86 Zha Bin
2020-02-11 11:14   ` Michael S. Tsirkin
2020-02-10 11:44 ` [PATCH v2 0/5] virtio mmio specification enhancement Michael S. Tsirkin
2020-02-11 16:05   ` Chao Peng
2020-02-11 10:57     ` Michael S. Tsirkin

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