From patchwork Thu May 7 14:27:19 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Auger X-Patchwork-Id: 6358721 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 2B6779F399 for ; Thu, 7 May 2015 14:30:31 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2C3AF2021F for ; Thu, 7 May 2015 14:30:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2CE8C20225 for ; Thu, 7 May 2015 14:30:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752429AbbEGOaU (ORCPT ); Thu, 7 May 2015 10:30:20 -0400 Received: from mail-wg0-f47.google.com ([74.125.82.47]:34574 "EHLO mail-wg0-f47.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752265AbbEGOaS (ORCPT ); Thu, 7 May 2015 10:30:18 -0400 Received: by wgic8 with SMTP id c8so18939464wgi.1 for ; Thu, 07 May 2015 07:30:16 -0700 (PDT) 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=5UOmV3bsNG7nhpF4INGBuPYitC1AFhkoYYiwHsZn/Ok=; b=kpGkx9L7L30POZOnzTAktsaNYWZsNEG5NiBYfTcEAWiAm+gm2/K3jLjEGaBUa8GwEm K+YRpy+EZQODE+R7SOH++LldYqbushQgfjRD+Reebk5sS5S+CNw7qGmFd/hsc0Sk+o2X PZgJGTQV+u46tM/XCEgCSatYYeviwiMZwOEqyYaJaNvfNyEwFyMxGYOQkYQN4+3mwjNl Xi5lt81M1Wd+XUDJxY71ppXkSnJi73Y9g3vCzkoYQR8rMHD4RkI1sCij/3Ql5XtKKw1M 366XsBjIUEjoGYoQ80ncWN8JIbc9m4f4FN10MADWU+2yhIKJp6pdBdOGiXw83VXKSsj6 uMYw== X-Gm-Message-State: ALoCoQmTE9hh3urkbUjnptaRge5/4uGhyz6C/ptQ8Z1FgVKEfYbaobFzlcWKbZquTuXQjm2FxVN8 X-Received: by 10.180.73.180 with SMTP id m20mr7291437wiv.2.1431009016543; Thu, 07 May 2015 07:30:16 -0700 (PDT) Received: from gnx2579.home (LCaen-156-56-7-90.w80-11.abo.wanadoo.fr. [80.11.198.90]) by mx.google.com with ESMTPSA id z12sm3704874wjw.39.2015.05.07.07.30.14 (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 07 May 2015 07:30:15 -0700 (PDT) From: Eric Auger To: eric.auger@st.com, eric.auger@linaro.org, christoffer.dall@linaro.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, alex.williamson@redhat.com, b.reynal@virtualopensystems.com Cc: linux-kernel@vger.kernel.org, patches@linaro.org, agraf@suse.de, Bharat.Bhushan@freescale.com Subject: [PATCH 1/5] VFIO: platform: add reset_list and register/unregister functions Date: Thu, 7 May 2015 16:27:19 +0200 Message-Id: <1431008843-28411-2-git-send-email-eric.auger@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1431008843-28411-1-git-send-email-eric.auger@linaro.org> References: <1431008843-28411-1-git-send-email-eric.auger@linaro.org> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP vfio_platform_common now stores a lists of available reset functions. Two functions are exposed to register/unregister a reset function. A reset function is paired with a compat string. Signed-off-by: Eric Auger --- drivers/vfio/platform/vfio_platform_common.c | 63 +++++++++++++++++++++++++++ drivers/vfio/platform/vfio_platform_private.h | 13 ++++++ 2 files changed, 76 insertions(+) diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c index abcff7a..edbf24c 100644 --- a/drivers/vfio/platform/vfio_platform_common.c +++ b/drivers/vfio/platform/vfio_platform_common.c @@ -23,6 +23,9 @@ #include "vfio_platform_private.h" +struct list_head reset_list; +LIST_HEAD(reset_list); + static DEFINE_MUTEX(driver_lock); static int vfio_platform_regions_init(struct vfio_platform_device *vdev) @@ -511,6 +514,13 @@ EXPORT_SYMBOL_GPL(vfio_platform_probe_common); struct vfio_platform_device *vfio_platform_remove_common(struct device *dev) { struct vfio_platform_device *vdev; + struct vfio_platform_reset_node *iter, *tmp; + + list_for_each_entry_safe(iter, tmp, &reset_list, link) { + list_del(&iter->link); + kfree(iter->compat); + kfree(iter); + } vdev = vfio_del_group_dev(dev); if (vdev) @@ -519,3 +529,56 @@ struct vfio_platform_device *vfio_platform_remove_common(struct device *dev) return vdev; } EXPORT_SYMBOL_GPL(vfio_platform_remove_common); + +int vfio_platform_register_reset(char *compat, struct module *reset_owner, + vfio_platform_reset_fn_t reset) +{ + struct vfio_platform_reset_node *node, *iter; + bool found = false; + + list_for_each_entry(iter, &reset_list, link) { + if (!strcmp(iter->compat, compat)) { + found = true; + break; + } + } + if (found) + return -EINVAL; + + node = kmalloc(sizeof(*node), GFP_KERNEL); + if (!node) + return -ENOMEM; + + node->compat = kstrdup(compat, GFP_KERNEL); + if (!node->compat) + return -ENOMEM; + + node->owner = reset_owner; + node->reset = reset; + + list_add(&node->link, &reset_list); + return 0; +} +EXPORT_SYMBOL_GPL(vfio_platform_register_reset); + +int vfio_platform_unregister_reset(char *compat) +{ + struct vfio_platform_reset_node *iter; + bool found = false; + + list_for_each_entry(iter, &reset_list, link) { + if (!strcmp(iter->compat, compat)) { + found = true; + break; + } + } + if (!found) + return -EINVAL; + + list_del(&iter->link); + kfree(iter->compat); + kfree(iter); + return 0; +} +EXPORT_SYMBOL_GPL(vfio_platform_unregister_reset); + diff --git a/drivers/vfio/platform/vfio_platform_private.h b/drivers/vfio/platform/vfio_platform_private.h index 5d31e04..da2d60b 100644 --- a/drivers/vfio/platform/vfio_platform_private.h +++ b/drivers/vfio/platform/vfio_platform_private.h @@ -69,6 +69,15 @@ struct vfio_platform_device { int (*get_irq)(struct vfio_platform_device *vdev, int i); }; +typedef int (*vfio_platform_reset_fn_t)(struct vfio_platform_device *vdev); + +struct vfio_platform_reset_node { + struct list_head link; + char *compat; + struct module *owner; + vfio_platform_reset_fn_t reset; +}; + extern int vfio_platform_probe_common(struct vfio_platform_device *vdev, struct device *dev); extern struct vfio_platform_device *vfio_platform_remove_common @@ -82,4 +91,8 @@ extern int vfio_platform_set_irqs_ioctl(struct vfio_platform_device *vdev, unsigned start, unsigned count, void *data); +extern int vfio_platform_register_reset(char *compat, struct module *owner, + vfio_platform_reset_fn_t reset); +extern int vfio_platform_unregister_reset(char *compat); + #endif /* VFIO_PLATFORM_PRIVATE_H */