[dpdk-dev,v8,08/14] eal/linux/pci: Add functions for unmapping igb_uio resources
Commit Message
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
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
> -----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>
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
[...]
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
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
> [...]
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?
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
@@ -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
new file mode 100644
@@ -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_ */
@@ -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.
@@ -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
@@ -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