> -----Original Message-----
> From: Tetsuya Mukawa [mailto:mukawa at igel.co.jp]
> Sent: Monday, February 9, 2015 8:31 AM
> To: dev at dpdk.org
> Cc: Iremonger, Bernard; Qiu, Michael; Tetsuya Mukawa
> Subject: [PATCH v7 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.
>
> 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 at 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 */
> +
> +#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 d847102..c3b7917 100644
> --- a/lib/librte_eal/linuxapp/eal/eal_pci.c
> +++ b/lib/librte_eal/linuxapp/eal/eal_pci.c
> @@ -166,6 +166,25 @@ 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 mapped at %p\n",
Hi Tetsuya,
" PCI memory mapped" should be "PCI memory unmapped"
Regards,
Bernard
> + requested_addr);
> +}
> +#endif /* ENABLE_HOTPLUG */
> +
> /* parse the "resource" sysfs file */
> #define IORESOURCE_MEM 0x00000200
>
> @@ -567,6 +586,31 @@ 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
> --
> 1.9.1
