diff mbox

[dpdk-dev,v8,08/14] eal/linux/pci: Add functions for unmapping igb_uio resources

Message ID 1424060073-23484-9-git-send-email-mukawa@igel.co.jp (mailing list archive)
State Superseded, archived
Headers show

Commit Message

Tetsuya Mukawa Feb. 16, 2015, 4:14 a.m. UTC
The patch adds functions for unmapping igb_uio resources. The patch is only
for Linux and igb_uio environment. VFIO and BSD are not supported.

v8:
- Fix typo.
  (Thanks to Iremonger, Bernard)
v5:
- Fix pci_unmap_device() to check pt_driver.
v4:
- Add parameter checking.
- Add header file to determine if hotplug can be enabled.

Signed-off-by: Tetsuya Mukawa <mukawa@igel.co.jp>
---
 lib/librte_eal/common/Makefile                  |  1 +
 lib/librte_eal/common/include/rte_dev_hotplug.h | 44 +++++++++++++++++
 lib/librte_eal/linuxapp/eal/eal_pci.c           | 44 +++++++++++++++++
 lib/librte_eal/linuxapp/eal/eal_pci_init.h      |  8 +++
 lib/librte_eal/linuxapp/eal/eal_pci_uio.c       | 65 +++++++++++++++++++++++++
 5 files changed, 162 insertions(+)
 create mode 100644 lib/librte_eal/common/include/rte_dev_hotplug.h

Comments

Neil Horman Feb. 16, 2015, 12:45 p.m. UTC | #1
On Mon, Feb 16, 2015 at 01:14:27PM +0900, Tetsuya Mukawa wrote:
> The patch adds functions for unmapping igb_uio resources. The patch is only
> for Linux and igb_uio environment. VFIO and BSD are not supported.
> 
> v8:
> - Fix typo.
>   (Thanks to Iremonger, Bernard)
> v5:
> - Fix pci_unmap_device() to check pt_driver.
> v4:
> - Add parameter checking.
> - Add header file to determine if hotplug can be enabled.
> 
> Signed-off-by: Tetsuya Mukawa <mukawa@igel.co.jp>
> ---
>  lib/librte_eal/common/Makefile                  |  1 +
>  lib/librte_eal/common/include/rte_dev_hotplug.h | 44 +++++++++++++++++
>  lib/librte_eal/linuxapp/eal/eal_pci.c           | 44 +++++++++++++++++
>  lib/librte_eal/linuxapp/eal/eal_pci_init.h      |  8 +++
>  lib/librte_eal/linuxapp/eal/eal_pci_uio.c       | 65 +++++++++++++++++++++++++
>  5 files changed, 162 insertions(+)
>  create mode 100644 lib/librte_eal/common/include/rte_dev_hotplug.h
> 
> diff --git a/lib/librte_eal/common/Makefile b/lib/librte_eal/common/Makefile
> index 52c1a5f..db7cc93 100644
> --- a/lib/librte_eal/common/Makefile
> +++ b/lib/librte_eal/common/Makefile
> @@ -41,6 +41,7 @@ INC += rte_eal_memconfig.h rte_malloc_heap.h
>  INC += rte_hexdump.h rte_devargs.h rte_dev.h
>  INC += rte_common_vect.h
>  INC += rte_pci_dev_feature_defs.h rte_pci_dev_features.h
> +INC += rte_dev_hotplug.h
>  
>  ifeq ($(CONFIG_RTE_INSECURE_FUNCTION_WARNING),y)
>  INC += rte_warnings.h
> diff --git a/lib/librte_eal/common/include/rte_dev_hotplug.h b/lib/librte_eal/common/include/rte_dev_hotplug.h
> new file mode 100644
> index 0000000..b333e0f
> --- /dev/null
> +++ b/lib/librte_eal/common/include/rte_dev_hotplug.h
> @@ -0,0 +1,44 @@
> +/*-
> + *   BSD LICENSE
> + *
> + *   Copyright(c) 2015 IGEL Co.,LTd.
> + *   All rights reserved.
> + *
> + *   Redistribution and use in source and binary forms, with or without
> + *   modification, are permitted provided that the following conditions
> + *   are met:
> + *
> + *     * Redistributions of source code must retain the above copyright
> + *       notice, this list of conditions and the following disclaimer.
> + *     * Redistributions in binary form must reproduce the above copyright
> + *       notice, this list of conditions and the following disclaimer in
> + *       the documentation and/or other materials provided with the
> + *       distribution.
> + *     * Neither the name of IGEL Co.,Ltd. nor the names of its
> + *       contributors may be used to endorse or promote products derived
> + *       from this software without specific prior written permission.
> + *
> + *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
> + *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
> + *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
> + *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
> + *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
> + *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> + *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
> + *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> + */
> +
> +#ifndef _RTE_DEV_HOTPLUG_H_
> +#define _RTE_DEV_HOTPLUG_H_
> +
> +/*
> + * determine if hotplug can be enabled on the system
> + */
> +#if defined(RTE_LIBRTE_EAL_HOTPLUG) && defined(RTE_LIBRTE_EAL_LINUXAPP)
> +#define ENABLE_HOTPLUG
> +#endif /* RTE_LIBRTE_EAL_HOTPLUG & RTE_LIBRTE_EAL_LINUXAPP */
I'm not sure why you're doing this.  Why not just test RTE_LIBRTE_EAL_HOTPLUG in
the various locations where your testing ENABLE_HOTPLUG?  This seems like
indirection for the sake of indirection.
Neil
Iremonger, Bernard Feb. 16, 2015, 4:25 p.m. UTC | #2
> -----Original Message-----
> From: Tetsuya Mukawa [mailto:mukawa@igel.co.jp]
> Sent: Monday, February 16, 2015 4:14 AM
> To: dev@dpdk.org
> Cc: Qiu, Michael; Iremonger, Bernard; Tetsuya Mukawa
> Subject: [PATCH v8 08/14] eal/linux/pci: Add functions for unmapping igb_uio resources
> 
> The patch adds functions for unmapping igb_uio resources. The patch is only for Linux and igb_uio
> environment. VFIO and BSD are not supported.
> 
> v8:
> - Fix typo.
>   (Thanks to Iremonger, Bernard)
> v5:
> - Fix pci_unmap_device() to check pt_driver.
> v4:
> - Add parameter checking.
> - Add header file to determine if hotplug can be enabled.
> 
> Signed-off-by: Tetsuya Mukawa <mukawa@igel.co.jp>

Acked-by: Bernard Iremonger <bernard.iremonger@intel.com>
Thomas Monjalon Feb. 17, 2015, 1:11 a.m. UTC | #3
2015-02-16 13:14, Tetsuya Mukawa:
> The patch adds functions for unmapping igb_uio resources. The patch is only
> for Linux and igb_uio environment. VFIO and BSD are not supported.
> 
> v8:
> - Fix typo.
>   (Thanks to Iremonger, Bernard)
> v5:
> - Fix pci_unmap_device() to check pt_driver.
> v4:
> - Add parameter checking.
> - Add header file to determine if hotplug can be enabled.
> 
> Signed-off-by: Tetsuya Mukawa <mukawa@igel.co.jp>
> ---
>  lib/librte_eal/common/Makefile                  |  1 +
>  lib/librte_eal/common/include/rte_dev_hotplug.h | 44 +++++++++++++++++
>  lib/librte_eal/linuxapp/eal/eal_pci.c           | 44 +++++++++++++++++
>  lib/librte_eal/linuxapp/eal/eal_pci_init.h      |  8 +++
>  lib/librte_eal/linuxapp/eal/eal_pci_uio.c       | 65 +++++++++++++++++++++++++
>  5 files changed, 162 insertions(+)
>  create mode 100644 lib/librte_eal/common/include/rte_dev_hotplug.h
> 
> diff --git a/lib/librte_eal/common/Makefile b/lib/librte_eal/common/Makefile
> index 52c1a5f..db7cc93 100644
> --- a/lib/librte_eal/common/Makefile
> +++ b/lib/librte_eal/common/Makefile
> @@ -41,6 +41,7 @@ INC += rte_eal_memconfig.h rte_malloc_heap.h
>  INC += rte_hexdump.h rte_devargs.h rte_dev.h
>  INC += rte_common_vect.h
>  INC += rte_pci_dev_feature_defs.h rte_pci_dev_features.h
> +INC += rte_dev_hotplug.h
>  
>  ifeq ($(CONFIG_RTE_INSECURE_FUNCTION_WARNING),y)
>  INC += rte_warnings.h
> diff --git a/lib/librte_eal/common/include/rte_dev_hotplug.h b/lib/librte_eal/common/include/rte_dev_hotplug.h
> new file mode 100644
> index 0000000..b333e0f
> --- /dev/null
> +++ b/lib/librte_eal/common/include/rte_dev_hotplug.h
> @@ -0,0 +1,44 @@
> +/*-
> + *   BSD LICENSE
> + *
> + *   Copyright(c) 2015 IGEL Co.,LTd.
> + *   All rights reserved.
> + *
> + *   Redistribution and use in source and binary forms, with or without
> + *   modification, are permitted provided that the following conditions
> + *   are met:
> + *
> + *     * Redistributions of source code must retain the above copyright
> + *       notice, this list of conditions and the following disclaimer.
> + *     * Redistributions in binary form must reproduce the above copyright
> + *       notice, this list of conditions and the following disclaimer in
> + *       the documentation and/or other materials provided with the
> + *       distribution.
> + *     * Neither the name of IGEL Co.,Ltd. nor the names of its
> + *       contributors may be used to endorse or promote products derived
> + *       from this software without specific prior written permission.
> + *
> + *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
> + *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
> + *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
> + *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
> + *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
> + *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
> + *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
> + *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
> + *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
> + *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
> + *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
> + */
> +
> +#ifndef _RTE_DEV_HOTPLUG_H_
> +#define _RTE_DEV_HOTPLUG_H_
> +
> +/*
> + * determine if hotplug can be enabled on the system
> + */
> +#if defined(RTE_LIBRTE_EAL_HOTPLUG) && defined(RTE_LIBRTE_EAL_LINUXAPP)
> +#define ENABLE_HOTPLUG
> +#endif /* RTE_LIBRTE_EAL_HOTPLUG & RTE_LIBRTE_EAL_LINUXAPP */

Please no.
You just have to set the build option to no in the default BSD config file
with a comment explaining it is not supported.

> +
> +#endif /* _RTE_DEV_HOTPLUG_H_ */
> diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c
> index 2d5f6a6..72a1362 100644
> --- a/lib/librte_eal/linuxapp/eal/eal_pci.c
> +++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
> @@ -167,6 +167,25 @@ pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size)
>  	return mapaddr;
>  }
>  
> +#ifdef ENABLE_HOTPLUG

Please avoid using #ifdef if not really necessary.

> +/* unmap a particular resource */
> +void
> +pci_unmap_resource(void *requested_addr, size_t size)
> +{
> +	if (requested_addr == NULL)
> +		return;
> +
> +	/* Unmap the PCI memory resource of device */
> +	if (munmap(requested_addr, size)) {
> +		RTE_LOG(ERR, EAL, "%s(): cannot munmap(%p, 0x%lx): %s\n",
> +			__func__, requested_addr, (unsigned long)size,
> +			strerror(errno));
> +	} else
> +		RTE_LOG(DEBUG, EAL, "  PCI memory unmapped at %p\n",
> +				requested_addr);
> +}
> +#endif /* ENABLE_HOTPLUG */
> +
>  /* parse the "resource" sysfs file */
>  #define IORESOURCE_MEM  0x00000200
[...]
Tetsuya Mukawa Feb. 17, 2015, 5:53 a.m. UTC | #4
On 2015/02/16 21:45, Neil Horman wrote:
> On Mon, Feb 16, 2015 at 01:14:27PM +0900, Tetsuya Mukawa wrote:
>> The patch adds functions for unmapping igb_uio resources. The patch is only
>> for Linux and igb_uio environment. VFIO and BSD are not supported.
>>
>> v8:
>> - Fix typo.
>>   (Thanks to Iremonger, Bernard)
>> v5:
>> - Fix pci_unmap_device() to check pt_driver.
>> v4:
>> - Add parameter checking.
>> - Add header file to determine if hotplug can be enabled.
>>
>> Signed-off-by: Tetsuya Mukawa <mukawa@igel.co.jp>
>> ---
>>  lib/librte_eal/common/Makefile                  |  1 +
>>  lib/librte_eal/common/include/rte_dev_hotplug.h | 44 +++++++++++++++++
>>  lib/librte_eal/linuxapp/eal/eal_pci.c           | 44 +++++++++++++++++
>>  lib/librte_eal/linuxapp/eal/eal_pci_init.h      |  8 +++
>>  lib/librte_eal/linuxapp/eal/eal_pci_uio.c       | 65 +++++++++++++++++++++++++
>>  5 files changed, 162 insertions(+)
>>  create mode 100644 lib/librte_eal/common/include/rte_dev_hotplug.h
>>
>> diff --git a/lib/librte_eal/common/Makefile b/lib/librte_eal/common/Makefile
>> index 52c1a5f..db7cc93 100644
>> --- a/lib/librte_eal/common/Makefile
>> +++ b/lib/librte_eal/common/Makefile
>> @@ -41,6 +41,7 @@ INC += rte_eal_memconfig.h rte_malloc_heap.h
>>  INC += rte_hexdump.h rte_devargs.h rte_dev.h
>>  INC += rte_common_vect.h
>>  INC += rte_pci_dev_feature_defs.h rte_pci_dev_features.h
>> +INC += rte_dev_hotplug.h
>>  
>>  ifeq ($(CONFIG_RTE_INSECURE_FUNCTION_WARNING),y)
>>  INC += rte_warnings.h
>> diff --git a/lib/librte_eal/common/include/rte_dev_hotplug.h b/lib/librte_eal/common/include/rte_dev_hotplug.h
>> new file mode 100644
>> index 0000000..b333e0f
>> --- /dev/null
>> +++ b/lib/librte_eal/common/include/rte_dev_hotplug.h
>> @@ -0,0 +1,44 @@
>> +/*-
>> + *   BSD LICENSE
>> + *
>> + *   Copyright(c) 2015 IGEL Co.,LTd.
>> + *   All rights reserved.
>> + *
>> + *   Redistribution and use in source and binary forms, with or without
>> + *   modification, are permitted provided that the following conditions
>> + *   are met:
>> + *
>> + *     * Redistributions of source code must retain the above copyright
>> + *       notice, this list of conditions and the following disclaimer.
>> + *     * Redistributions in binary form must reproduce the above copyright
>> + *       notice, this list of conditions and the following disclaimer in
>> + *       the documentation and/or other materials provided with the
>> + *       distribution.
>> + *     * Neither the name of IGEL Co.,Ltd. nor the names of its
>> + *       contributors may be used to endorse or promote products derived
>> + *       from this software without specific prior written permission.
>> + *
>> + *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
>> + *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
>> + *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
>> + *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
>> + *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
>> + *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
>> + *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
>> + *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
>> + *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>> + *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
>> + *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>> + */
>> +
>> +#ifndef _RTE_DEV_HOTPLUG_H_
>> +#define _RTE_DEV_HOTPLUG_H_
>> +
>> +/*
>> + * determine if hotplug can be enabled on the system
>> + */
>> +#if defined(RTE_LIBRTE_EAL_HOTPLUG) && defined(RTE_LIBRTE_EAL_LINUXAPP)
>> +#define ENABLE_HOTPLUG
>> +#endif /* RTE_LIBRTE_EAL_HOTPLUG & RTE_LIBRTE_EAL_LINUXAPP */
> I'm not sure why you're doing this.  Why not just test RTE_LIBRTE_EAL_HOTPLUG in
> the various locations where your testing ENABLE_HOTPLUG?  This seems like
> indirection for the sake of indirection.
> Neil
>

Hi Neil,

I will define RTE_LIBRTE_EAL_HOTPLUG=y in only Linux configuration.
And use it other places like you said.

Thanks,
Tetsuya
Tetsuya Mukawa Feb. 17, 2015, 6:15 a.m. UTC | #5
On 2015/02/17 10:11, Thomas Monjalon wrote:
> 2015-02-16 13:14, Tetsuya Mukawa:
>> The patch adds functions for unmapping igb_uio resources. The patch is only
>> for Linux and igb_uio environment. VFIO and BSD are not supported.
>>
>> v8:
>> - Fix typo.
>>   (Thanks to Iremonger, Bernard)
>> v5:
>> - Fix pci_unmap_device() to check pt_driver.
>> v4:
>> - Add parameter checking.
>> - Add header file to determine if hotplug can be enabled.
>>
>> Signed-off-by: Tetsuya Mukawa <mukawa@igel.co.jp>
>> ---
>>  lib/librte_eal/common/Makefile                  |  1 +
>>  lib/librte_eal/common/include/rte_dev_hotplug.h | 44 +++++++++++++++++
>>  lib/librte_eal/linuxapp/eal/eal_pci.c           | 44 +++++++++++++++++
>>  lib/librte_eal/linuxapp/eal/eal_pci_init.h      |  8 +++
>>  lib/librte_eal/linuxapp/eal/eal_pci_uio.c       | 65 +++++++++++++++++++++++++
>>  5 files changed, 162 insertions(+)
>>  create mode 100644 lib/librte_eal/common/include/rte_dev_hotplug.h
>>
>> diff --git a/lib/librte_eal/common/Makefile b/lib/librte_eal/common/Makefile
>> index 52c1a5f..db7cc93 100644
>> --- a/lib/librte_eal/common/Makefile
>> +++ b/lib/librte_eal/common/Makefile
>> @@ -41,6 +41,7 @@ INC += rte_eal_memconfig.h rte_malloc_heap.h
>>  INC += rte_hexdump.h rte_devargs.h rte_dev.h
>>  INC += rte_common_vect.h
>>  INC += rte_pci_dev_feature_defs.h rte_pci_dev_features.h
>> +INC += rte_dev_hotplug.h
>>  
>>  ifeq ($(CONFIG_RTE_INSECURE_FUNCTION_WARNING),y)
>>  INC += rte_warnings.h
>> diff --git a/lib/librte_eal/common/include/rte_dev_hotplug.h b/lib/librte_eal/common/include/rte_dev_hotplug.h
>> new file mode 100644
>> index 0000000..b333e0f
>> --- /dev/null
>> +++ b/lib/librte_eal/common/include/rte_dev_hotplug.h
>> @@ -0,0 +1,44 @@
>> +/*-
>> + *   BSD LICENSE
>> + *
>> + *   Copyright(c) 2015 IGEL Co.,LTd.
>> + *   All rights reserved.
>> + *
>> + *   Redistribution and use in source and binary forms, with or without
>> + *   modification, are permitted provided that the following conditions
>> + *   are met:
>> + *
>> + *     * Redistributions of source code must retain the above copyright
>> + *       notice, this list of conditions and the following disclaimer.
>> + *     * Redistributions in binary form must reproduce the above copyright
>> + *       notice, this list of conditions and the following disclaimer in
>> + *       the documentation and/or other materials provided with the
>> + *       distribution.
>> + *     * Neither the name of IGEL Co.,Ltd. nor the names of its
>> + *       contributors may be used to endorse or promote products derived
>> + *       from this software without specific prior written permission.
>> + *
>> + *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
>> + *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
>> + *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
>> + *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
>> + *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
>> + *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
>> + *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
>> + *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
>> + *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>> + *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
>> + *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>> + */
>> +
>> +#ifndef _RTE_DEV_HOTPLUG_H_
>> +#define _RTE_DEV_HOTPLUG_H_
>> +
>> +/*
>> + * determine if hotplug can be enabled on the system
>> + */
>> +#if defined(RTE_LIBRTE_EAL_HOTPLUG) && defined(RTE_LIBRTE_EAL_LINUXAPP)
>> +#define ENABLE_HOTPLUG
>> +#endif /* RTE_LIBRTE_EAL_HOTPLUG & RTE_LIBRTE_EAL_LINUXAPP */
> Please no.
> You just have to set the build option to no in the default BSD config file
> with a comment explaining it is not supported.

OK, I will change like you said.

>> +
>> +#endif /* _RTE_DEV_HOTPLUG_H_ */
>> diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c
>> index 2d5f6a6..72a1362 100644
>> --- a/lib/librte_eal/linuxapp/eal/eal_pci.c
>> +++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
>> @@ -167,6 +167,25 @@ pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size)
>>  	return mapaddr;
>>  }
>>  
>> +#ifdef ENABLE_HOTPLUG
> Please avoid using #ifdef if not really necessary.

I agree with you.
In this case, only hotplug functions call pci_unmap_resource().
So this will be needed.

>> +/* unmap a particular resource */
>> +void
>> +pci_unmap_resource(void *requested_addr, size_t size)
>> +{
>> +	if (requested_addr == NULL)
>> +		return;
>> +
>> +	/* Unmap the PCI memory resource of device */
>> +	if (munmap(requested_addr, size)) {
>> +		RTE_LOG(ERR, EAL, "%s(): cannot munmap(%p, 0x%lx): %s\n",
>> +			__func__, requested_addr, (unsigned long)size,
>> +			strerror(errno));
>> +	} else
>> +		RTE_LOG(DEBUG, EAL, "  PCI memory unmapped at %p\n",
>> +				requested_addr);
>> +}
>> +#endif /* ENABLE_HOTPLUG */
>> +
>>  /* parse the "resource" sysfs file */
>>  #define IORESOURCE_MEM  0x00000200
> [...]
Thomas Monjalon Feb. 18, 2015, 1:09 a.m. UTC | #6
2015-02-17 15:15, Tetsuya Mukawa:
> On 2015/02/17 10:11, Thomas Monjalon wrote:
> > 2015-02-16 13:14, Tetsuya Mukawa:
> >> +#ifdef ENABLE_HOTPLUG
> > Please avoid using #ifdef if not really necessary.
> 
> I agree with you.
> In this case, only hotplug functions call pci_unmap_resource().
> So this will be needed.

Why is it needed?
Tetsuya Mukawa Feb. 18, 2015, 9:37 a.m. UTC | #7
On 2015/02/18 10:09, Thomas Monjalon wrote:
> 2015-02-17 15:15, Tetsuya Mukawa:
>> On 2015/02/17 10:11, Thomas Monjalon wrote:
>>> 2015-02-16 13:14, Tetsuya Mukawa:
>>>> +#ifdef ENABLE_HOTPLUG
>>> Please avoid using #ifdef if not really necessary.
>> I agree with you.
>> In this case, only hotplug functions call pci_unmap_resource().
>> So this will be needed.
> Why is it needed?

It was my misunderstanding. Yes, we can remove it.
I will fix it.

Thanks,
Tetsuya
diff mbox

Patch

diff --git a/lib/librte_eal/common/Makefile b/lib/librte_eal/common/Makefile
index 52c1a5f..db7cc93 100644
--- a/lib/librte_eal/common/Makefile
+++ b/lib/librte_eal/common/Makefile
@@ -41,6 +41,7 @@  INC += rte_eal_memconfig.h rte_malloc_heap.h
 INC += rte_hexdump.h rte_devargs.h rte_dev.h
 INC += rte_common_vect.h
 INC += rte_pci_dev_feature_defs.h rte_pci_dev_features.h
+INC += rte_dev_hotplug.h
 
 ifeq ($(CONFIG_RTE_INSECURE_FUNCTION_WARNING),y)
 INC += rte_warnings.h
diff --git a/lib/librte_eal/common/include/rte_dev_hotplug.h b/lib/librte_eal/common/include/rte_dev_hotplug.h
new file mode 100644
index 0000000..b333e0f
--- /dev/null
+++ b/lib/librte_eal/common/include/rte_dev_hotplug.h
@@ -0,0 +1,44 @@ 
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2015 IGEL Co.,LTd.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of IGEL Co.,Ltd. nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RTE_DEV_HOTPLUG_H_
+#define _RTE_DEV_HOTPLUG_H_
+
+/*
+ * determine if hotplug can be enabled on the system
+ */
+#if defined(RTE_LIBRTE_EAL_HOTPLUG) && defined(RTE_LIBRTE_EAL_LINUXAPP)
+#define ENABLE_HOTPLUG
+#endif /* RTE_LIBRTE_EAL_HOTPLUG & RTE_LIBRTE_EAL_LINUXAPP */
+
+#endif /* _RTE_DEV_HOTPLUG_H_ */
diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c
index 2d5f6a6..72a1362 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
@@ -167,6 +167,25 @@  pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size)
 	return mapaddr;
 }
 
+#ifdef ENABLE_HOTPLUG
+/* unmap a particular resource */
+void
+pci_unmap_resource(void *requested_addr, size_t size)
+{
+	if (requested_addr == NULL)
+		return;
+
+	/* Unmap the PCI memory resource of device */
+	if (munmap(requested_addr, size)) {
+		RTE_LOG(ERR, EAL, "%s(): cannot munmap(%p, 0x%lx): %s\n",
+			__func__, requested_addr, (unsigned long)size,
+			strerror(errno));
+	} else
+		RTE_LOG(DEBUG, EAL, "  PCI memory unmapped at %p\n",
+				requested_addr);
+}
+#endif /* ENABLE_HOTPLUG */
+
 /* parse the "resource" sysfs file */
 #define IORESOURCE_MEM  0x00000200
 
@@ -579,6 +598,31 @@  pci_map_device(struct rte_pci_device *dev)
 	return ret;
 }
 
+#ifdef ENABLE_HOTPLUG
+static void
+pci_unmap_device(struct rte_pci_device *dev)
+{
+	if (dev == NULL)
+		return;
+
+	/* try unmapping the NIC resources using VFIO if it exists */
+	switch (dev->pt_driver) {
+	case RTE_PT_VFIO:
+		RTE_LOG(ERR, EAL, "Hotplug doesn't support vfio yet\n");
+		break;
+	case RTE_PT_IGB_UIO:
+	case RTE_PT_UIO_GENERIC:
+		/* unmap resources for devices that use uio */
+		pci_uio_unmap_resource(dev);
+		break;
+	default:
+		RTE_LOG(DEBUG, EAL, "  Not managed by known pt driver,"
+			" skipped\n");
+		break;
+	}
+}
+#endif /* ENABLE_HOTPLUG */
+
 /*
  * If vendor/device ID match, call the devinit() function of the
  * driver.
diff --git a/lib/librte_eal/linuxapp/eal/eal_pci_init.h b/lib/librte_eal/linuxapp/eal/eal_pci_init.h
index 1070eb8..5152a0b 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci_init.h
+++ b/lib/librte_eal/linuxapp/eal/eal_pci_init.h
@@ -34,6 +34,7 @@ 
 #ifndef EAL_PCI_INIT_H_
 #define EAL_PCI_INIT_H_
 
+#include <rte_dev_hotplug.h>
 #include "eal_vfio.h"
 
 struct pci_map {
@@ -71,6 +72,13 @@  void *pci_map_resource(void *requested_addr, int fd, off_t offset,
 /* map IGB_UIO resource prototype */
 int pci_uio_map_resource(struct rte_pci_device *dev);
 
+#ifdef ENABLE_HOTPLUG
+void pci_unmap_resource(void *requested_addr, size_t size);
+
+/* unmap IGB_UIO resource prototype */
+void pci_uio_unmap_resource(struct rte_pci_device *dev);
+#endif /* ENABLE_HOTPLUG */
+
 #ifdef VFIO_PRESENT
 
 #define VFIO_MAX_GROUPS 64
diff --git a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
index 1da3507..81830d1 100644
--- a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
+++ b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c
@@ -404,6 +404,71 @@  pci_uio_map_resource(struct rte_pci_device *dev)
 	return 0;
 }
 
+#ifdef ENABLE_HOTPLUG
+static void
+pci_uio_unmap(struct mapped_pci_resource *uio_res)
+{
+	int i;
+
+	if (uio_res == NULL)
+		return;
+
+	for (i = 0; i != uio_res->nb_maps; i++)
+		pci_unmap_resource(uio_res->maps[i].addr,
+				(size_t)uio_res->maps[i].size);
+}
+
+static struct mapped_pci_resource *
+pci_uio_find_resource(struct rte_pci_device *dev)
+{
+	struct mapped_pci_resource *uio_res;
+
+	if (dev == NULL)
+		return NULL;
+
+	TAILQ_FOREACH(uio_res, pci_res_list, next) {
+
+		/* skip this element if it doesn't match our PCI address */
+		if (!eal_compare_pci_addr(&uio_res->pci_addr, &dev->addr))
+			return uio_res;
+	}
+	return NULL;
+}
+
+/* unmap the PCI resource of a PCI device in virtual memory */
+void
+pci_uio_unmap_resource(struct rte_pci_device *dev)
+{
+	struct mapped_pci_resource *uio_res;
+
+	if (dev == NULL)
+		return;
+
+	/* find an entry for the device */
+	uio_res = pci_uio_find_resource(dev);
+	if (uio_res == NULL)
+		return;
+
+	/* secondary processes - just free maps */
+	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+		return pci_uio_unmap(uio_res);
+
+	TAILQ_REMOVE(pci_res_list, uio_res, next);
+
+	/* unmap all resources */
+	pci_uio_unmap(uio_res);
+
+	/* free uio resource */
+	rte_free(uio_res);
+
+	/* close fd if in primary process */
+	close(dev->intr_handle.fd);
+
+	dev->intr_handle.fd = -1;
+	dev->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
+}
+#endif /* ENABLE_HOTPLUG */
+
 /*
  * parse a sysfs file containing one integer value
  * different to the eal version, as it needs to work with 64-bit values