From patchwork Mon Apr 13 06:11:49 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiang Liu X-Patchwork-Id: 6205941 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 4AC6CBF4A6 for ; Mon, 13 Apr 2015 06:21:37 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 006F1201CD for ; Mon, 13 Apr 2015 06:21:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 82EF3200DF for ; Mon, 13 Apr 2015 06:21:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752676AbbDMGVR (ORCPT ); Mon, 13 Apr 2015 02:21:17 -0400 Received: from mga09.intel.com ([134.134.136.24]:5834 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753954AbbDMGP1 (ORCPT ); Mon, 13 Apr 2015 02:15:27 -0400 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP; 12 Apr 2015 23:15:26 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.11,568,1422950400"; d="scan'208";a="694315739" Received: from gerry-dev.bj.intel.com ([10.238.158.72]) by fmsmga001.fm.intel.com with ESMTP; 12 Apr 2015 23:15:21 -0700 From: Jiang Liu To: Bjorn Helgaas , Benjamin Herrenschmidt , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , "Rafael J. Wysocki" , Randy Dunlap , Yinghai Lu , Borislav Petkov , Dimitri Sivanich , x86@kernel.org, Jiang Liu Cc: Konrad Rzeszutek Wilk , David Cohen , Sander Eikelenboom , David Vrabel , Andrew Morton , Tony Luck , Joerg Roedel , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org Subject: [Patch Part1 v8 27/37] x86/irq: Simplify MSI/DMAR/HPET implementation by using common code Date: Mon, 13 Apr 2015 14:11:49 +0800 Message-Id: <1428905519-23704-28-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1428905519-23704-1-git-send-email-jiang.liu@linux.intel.com> References: <1428905519-23704-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@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=unavailable 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 Use common MSI interfaces to simplify DMAR/HPET driver implementation. Signed-off-by: Jiang Liu Cc: Konrad Rzeszutek Wilk Cc: Tony Luck Cc: Joerg Roedel Cc: Greg Kroah-Hartman Cc: Bjorn Helgaas Cc: Benjamin Herrenschmidt Cc: Rafael J. Wysocki Cc: Randy Dunlap Cc: Yinghai Lu Cc: Borislav Petkov Link: http://lkml.kernel.org/r/1416894816-23245-28-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner --- arch/x86/kernel/apic/msi.c | 192 +++++++++++++------------------------------- 1 file changed, 54 insertions(+), 138 deletions(-) diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c index f5b899514634..da163da5fdee 100644 --- a/arch/x86/kernel/apic/msi.c +++ b/arch/x86/kernel/apic/msi.c @@ -62,10 +62,8 @@ static struct irq_chip pci_msi_controller = { .irq_unmask = pci_msi_unmask_irq, .irq_mask = pci_msi_mask_irq, .irq_ack = irq_chip_ack_parent, - .irq_set_affinity = msi_domain_set_affinity, .irq_retrigger = irq_chip_retrigger_hierarchy, .irq_compose_msi_msg = irq_msi_compose_msg, - .irq_write_msi_msg = pci_msi_domain_write_msg, .flags = IRQCHIP_SKIP_SET_WAKE, }; @@ -153,9 +151,7 @@ static struct irq_chip pci_msi_ir_controller = { .irq_unmask = pci_msi_unmask_irq, .irq_mask = pci_msi_mask_irq, .irq_ack = irq_chip_ack_parent, - .irq_set_affinity = msi_domain_set_affinity, .irq_retrigger = irq_chip_retrigger_hierarchy, - .irq_write_msi_msg = pci_msi_domain_write_msg, .flags = IRQCHIP_SKIP_SET_WAKE, }; @@ -175,23 +171,6 @@ struct irq_domain *arch_create_msi_irq_domain(struct irq_domain *parent) #endif #ifdef CONFIG_DMAR_TABLE -static int -dmar_msi_set_affinity(struct irq_data *data, const struct cpumask *mask, - bool force) -{ - struct irq_data *parent = data->parent_data; - struct msi_msg msg; - int ret; - - ret = parent->chip->irq_set_affinity(parent, mask, force); - if (ret >= 0) { - irq_chip_compose_msi_msg(data, &msg); - dmar_msi_write(data->irq, &msg); - } - - return ret; -} - static void dmar_msi_write_msg(struct irq_data *data, struct msi_msg *msg) { dmar_msi_write(data->irq, msg); @@ -202,67 +181,37 @@ static struct irq_chip dmar_msi_controller = { .irq_unmask = dmar_msi_unmask, .irq_mask = dmar_msi_mask, .irq_ack = irq_chip_ack_parent, - .irq_set_affinity = dmar_msi_set_affinity, + .irq_set_affinity = msi_domain_set_affinity, .irq_retrigger = irq_chip_retrigger_hierarchy, .irq_compose_msi_msg = irq_msi_compose_msg, .irq_write_msi_msg = dmar_msi_write_msg, .flags = IRQCHIP_SKIP_SET_WAKE, }; -static int dmar_domain_alloc(struct irq_domain *domain, unsigned int virq, - unsigned int nr_irqs, void *arg) +static irq_hw_number_t dmar_msi_get_hwirq(struct msi_domain_info *info, + msi_alloc_info_t *arg) { - struct irq_alloc_info *info = arg; - int ret; - - if (nr_irqs > 1 || !info || info->type != X86_IRQ_ALLOC_TYPE_DMAR) - return -EINVAL; - if (irq_find_mapping(domain, info->dmar_id)) { - pr_warn("IRQ for DMAR%d already exists.\n", info->dmar_id); - return -EEXIST; - } - - ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg); - if (ret >= 0) { - irq_domain_set_hwirq_and_chip(domain, virq, info->dmar_id, - &dmar_msi_controller, NULL); - irq_set_handler_data(virq, info->dmar_data); - __irq_set_handler(virq, handle_edge_irq, 0, "edge"); - } - - return ret; + return arg->dmar_id; } -static void dmar_domain_free(struct irq_domain *domain, unsigned int virq, - unsigned int nr_irqs) +static int dmar_msi_init(struct irq_domain *domain, + struct msi_domain_info *info, unsigned int virq, + irq_hw_number_t hwirq, msi_alloc_info_t *arg) { - BUG_ON(nr_irqs > 1); - irq_domain_free_irqs_top(domain, virq, nr_irqs); -} + irq_domain_set_info(domain, virq, arg->dmar_id, info->chip, NULL, + handle_edge_irq, arg->dmar_data, "edge"); -static void dmar_domain_activate(struct irq_domain *domain, - struct irq_data *irq_data) -{ - struct msi_msg msg; - - BUG_ON(irq_chip_compose_msi_msg(irq_data, &msg)); - dmar_msi_write(irq_data->irq, &msg); + return 0; } -static void dmar_domain_deactivate(struct irq_domain *domain, - struct irq_data *irq_data) -{ - struct msi_msg msg; - - memset(&msg, 0, sizeof(msg)); - dmar_msi_write(irq_data->irq, &msg); -} +static struct msi_domain_ops dmar_msi_domain_ops = { + .get_hwirq = dmar_msi_get_hwirq, + .msi_init = dmar_msi_init, +}; -static struct irq_domain_ops dmar_domain_ops = { - .alloc = dmar_domain_alloc, - .free = dmar_domain_free, - .activate = dmar_domain_activate, - .deactivate = dmar_domain_deactivate, +static struct msi_domain_info dmar_msi_domain_info = { + .ops = &dmar_msi_domain_ops, + .chip = &dmar_msi_controller, }; static struct irq_domain *dmar_get_irq_domain(void) @@ -271,11 +220,9 @@ static struct irq_domain *dmar_get_irq_domain(void) static DEFINE_MUTEX(dmar_lock); mutex_lock(&dmar_lock); - if (dmar_domain == NULL) { - dmar_domain = irq_domain_add_tree(NULL, &dmar_domain_ops, NULL); - if (dmar_domain) - dmar_domain->parent = x86_vector_domain; - } + if (dmar_domain == NULL) + dmar_domain = msi_create_irq_domain(NULL, &dmar_msi_domain_info, + x86_vector_domain); mutex_unlock(&dmar_lock); return dmar_domain; @@ -309,23 +256,9 @@ void dmar_free_hwirq(int irq) #ifdef CONFIG_HPET_TIMER static inline int hpet_dev_id(struct irq_domain *domain) { - return (int)(long)domain->host_data; -} + struct msi_domain_info *info = msi_get_domain_info(domain); -static int hpet_msi_set_affinity(struct irq_data *data, - const struct cpumask *mask, bool force) -{ - struct irq_data *parent = data->parent_data; - struct msi_msg msg; - int ret; - - ret = parent->chip->irq_set_affinity(parent, mask, force); - if (ret >= 0 && ret != IRQ_SET_MASK_OK_DONE) { - irq_chip_compose_msi_msg(data, &msg); - hpet_msi_write(data->handler_data, &msg); - } - - return ret; + return (int)(long)info->data; } static void hpet_msi_write_msg(struct irq_data *data, struct msi_msg *msg) @@ -338,79 +271,63 @@ static struct irq_chip hpet_msi_controller = { .irq_unmask = hpet_msi_unmask, .irq_mask = hpet_msi_mask, .irq_ack = irq_chip_ack_parent, - .irq_set_affinity = hpet_msi_set_affinity, + .irq_set_affinity = msi_domain_set_affinity, .irq_retrigger = irq_chip_retrigger_hierarchy, .irq_compose_msi_msg = irq_msi_compose_msg, .irq_write_msi_msg = hpet_msi_write_msg, .flags = IRQCHIP_SKIP_SET_WAKE, }; -static int hpet_domain_alloc(struct irq_domain *domain, unsigned int virq, - unsigned int nr_irqs, void *arg) -{ - struct irq_alloc_info *info = arg; - int ret; - - if (nr_irqs > 1 || !info || info->type != X86_IRQ_ALLOC_TYPE_HPET) - return -EINVAL; - if (irq_find_mapping(domain, info->hpet_index)) { - pr_warn("IRQ for HPET%d already exists.\n", info->hpet_index); - return -EEXIST; - } - - ret = irq_domain_alloc_irqs_parent(domain, virq, nr_irqs, arg); - if (ret >= 0) { - irq_set_status_flags(virq, IRQ_MOVE_PCNTXT); - irq_domain_set_hwirq_and_chip(domain, virq, info->hpet_index, - &hpet_msi_controller, NULL); - irq_set_handler_data(virq, info->hpet_data); - __irq_set_handler(virq, handle_edge_irq, 0, "edge"); - } - - return ret; -} - -static void hpet_domain_free(struct irq_domain *domain, unsigned int virq, - unsigned int nr_irqs) +static irq_hw_number_t hpet_msi_get_hwirq(struct msi_domain_info *info, + msi_alloc_info_t *arg) { - BUG_ON(nr_irqs > 1); - irq_clear_status_flags(virq, IRQ_MOVE_PCNTXT); - irq_domain_free_irqs_top(domain, virq, nr_irqs); + return arg->hpet_index; } -static void hpet_domain_activate(struct irq_domain *domain, - struct irq_data *irq_data) +static int hpet_msi_init(struct irq_domain *domain, + struct msi_domain_info *info, unsigned int virq, + irq_hw_number_t hwirq, msi_alloc_info_t *arg) { - struct msi_msg msg; + irq_set_status_flags(virq, IRQ_MOVE_PCNTXT); + irq_domain_set_info(domain, virq, arg->hpet_index, info->chip, NULL, + handle_edge_irq, arg->hpet_data, "edge"); - BUG_ON(irq_chip_compose_msi_msg(irq_data, &msg)); - hpet_msi_write(irq_get_handler_data(irq_data->irq), &msg); + return 0; } -static void hpet_domain_deactivate(struct irq_domain *domain, - struct irq_data *irq_data) +static void hpet_msi_free(struct irq_domain *domain, + struct msi_domain_info *info, unsigned int virq) { - struct msi_msg msg; - - memset(&msg, 0, sizeof(msg)); - hpet_msi_write(irq_get_handler_data(irq_data->irq), &msg); + irq_clear_status_flags(virq, IRQ_MOVE_PCNTXT); } -static struct irq_domain_ops hpet_domain_ops = { - .alloc = hpet_domain_alloc, - .free = hpet_domain_free, - .activate = hpet_domain_activate, - .deactivate = hpet_domain_deactivate, +static struct msi_domain_ops hpet_msi_domain_ops = { + .get_hwirq = hpet_msi_get_hwirq, + .msi_init = hpet_msi_init, + .msi_free = hpet_msi_free, +}; + +static struct msi_domain_info hpet_msi_domain_info = { + .ops = &hpet_msi_domain_ops, + .chip = &hpet_msi_controller, }; struct irq_domain *hpet_create_irq_domain(int hpet_id) { struct irq_domain *parent; struct irq_alloc_info info; + struct msi_domain_info *domain_info; if (x86_vector_domain == NULL) return NULL; + domain_info = kzalloc(sizeof(*domain_info), GFP_KERNEL); + if (!domain_info) + return NULL; + + *domain_info = hpet_msi_domain_info; + domain_info->data = (void *)(long)hpet_id; + init_irq_alloc_info(&info, NULL); info.type = X86_IRQ_ALLOC_TYPE_HPET; info.hpet_id = hpet_id; @@ -420,8 +337,7 @@ struct irq_domain *hpet_create_irq_domain(int hpet_id) else hpet_msi_controller.name = "IR-HPET-MSI"; - return irq_domain_add_hierarchy(parent, 0, 0, NULL, &hpet_domain_ops, - (void *)(long)hpet_id); + return msi_create_irq_domain(NULL, domain_info, parent); } int hpet_assign_irq(struct irq_domain *domain, struct hpet_dev *dev,