From patchwork Mon Feb 23 12:45:58 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tetsuya Mukawa X-Patchwork-Id: 3613 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id BA2EEB417; Mon, 23 Feb 2015 13:47:07 +0100 (CET) Received: from mail-pd0-f170.google.com (mail-pd0-f170.google.com [209.85.192.170]) by dpdk.org (Postfix) with ESMTP id 0AB05ADE8 for ; Mon, 23 Feb 2015 13:46:57 +0100 (CET) Received: by pdjg10 with SMTP id g10so25274480pdj.1 for ; Mon, 23 Feb 2015 04:46:56 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=GBrSz68W0aJeIRNkfhXlx6B7C1fKC4Iq0VhvnjvHxUE=; b=b1y1DHWFr9Ov0IXv21YMzNeF2EBcKYIxf4cjdXip+dyD4YXszJ8prWkgPQopxTwmym 6zrtWIKPc6fybKy5lIGJvlFw1wx2RwWWzqt0LwsR+5al9t8joCp6J3OlXilJqQ0kRBbD qHe5rsYSDsrjd+XrnfxzPX8qJa8WrRuCCTVhrEbc+QXY+jkeICdU1ab37CWoIt2MrD7J LwMMQ79IRXsQDxeZSPPEfbobTsS52hC1doPaAMIGUWGKl2nb1MrucgPXK5fc63gQ+hxb kBj1mHEU6BkLxTXbOz2JicuPxwYNVHY6CKNTwYYCQG4oXCosz/zLnE/UxDJG9jI7NCI6 Wvzg== X-Gm-Message-State: ALoCoQk52JQV3VvWop2bOEu9+IV4PFeZH0gE5dsUuZtv4FobkUbbN9J56/yasGaoUCQhF5ej07v1 X-Received: by 10.66.219.233 with SMTP id pr9mr19259567pac.8.1424695616475; Mon, 23 Feb 2015 04:46:56 -0800 (PST) Received: from localhost.localdomain (napt.igel.co.jp. [219.106.231.132]) by mx.google.com with ESMTPSA id cf12sm10491641pdb.43.2015.02.23.04.46.54 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 23 Feb 2015 04:46:55 -0800 (PST) From: Tetsuya Mukawa To: dev@dpdk.org Date: Mon, 23 Feb 2015 21:45:58 +0900 Message-Id: <1424695564-3913-10-git-send-email-mukawa@igel.co.jp> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1424695564-3913-1-git-send-email-mukawa@igel.co.jp> References: <1424060073-23484-2-git-send-email-mukawa@igel.co.jp> <1424695564-3913-1-git-send-email-mukawa@igel.co.jp> Subject: [dpdk-dev] [PATCH v12 09/13] eal/linux/pci: Add functions for unmapping igb_uio resources X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 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. v9: - Remove "rte_dev_hotplug.h". - Remove needless "#ifdef". (Thanks to Thomas Monjalon and Neil Horman) - Remove pci_unmap_device(). It will be implemented in later patch. 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 --- lib/librte_eal/linuxapp/eal/eal_pci.c | 17 ++++++++ lib/librte_eal/linuxapp/eal/eal_pci_init.h | 7 ++++ lib/librte_eal/linuxapp/eal/eal_pci_uio.c | 65 ++++++++++++++++++++++++++++++ 3 files changed, 89 insertions(+) diff --git a/lib/librte_eal/linuxapp/eal/eal_pci.c b/lib/librte_eal/linuxapp/eal/eal_pci.c index e6cead1..17f32c0 100644 --- a/lib/librte_eal/linuxapp/eal/eal_pci.c +++ b/lib/librte_eal/linuxapp/eal/eal_pci.c @@ -167,6 +167,23 @@ pci_map_resource(void *requested_addr, int fd, off_t offset, size_t size) return mapaddr; } +/* 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); +} + /* parse the "resource" sysfs file */ static int pci_parse_sysfs_resource(const char *filename, struct rte_pci_device *dev) diff --git a/lib/librte_eal/linuxapp/eal/eal_pci_init.h b/lib/librte_eal/linuxapp/eal/eal_pci_init.h index 1070eb8..e2dd8a5 100644 --- a/lib/librte_eal/linuxapp/eal/eal_pci_init.h +++ b/lib/librte_eal/linuxapp/eal/eal_pci_init.h @@ -71,6 +71,13 @@ 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); +void pci_unmap_resource(void *requested_addr, size_t size); + +#ifdef RTE_LIBRTE_EAL_HOTPLUG +/* unmap IGB_UIO resource prototype */ +void pci_uio_unmap_resource(struct rte_pci_device *dev); +#endif /* RTE_LIBRTE_EAL_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 f7acc55..ff4d0e8 100644 --- a/lib/librte_eal/linuxapp/eal/eal_pci_uio.c +++ b/lib/librte_eal/linuxapp/eal/eal_pci_uio.c @@ -433,3 +433,68 @@ pci_uio_map_resource(struct rte_pci_device *dev) return 0; } + +#ifdef RTE_LIBRTE_EAL_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 (!rte_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 /* RTE_LIBRTE_EAL_HOTPLUG */