From patchwork Wed Feb 17 03:44:21 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gavin Shan X-Patchwork-Id: 8334331 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 65B43C02AE for ; Wed, 17 Feb 2016 03:46:55 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9F17C202FF for ; Wed, 17 Feb 2016 03:46:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7308C20320 for ; Wed, 17 Feb 2016 03:46:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965177AbcBQDqU (ORCPT ); Tue, 16 Feb 2016 22:46:20 -0500 Received: from e23smtp03.au.ibm.com ([202.81.31.145]:60689 "EHLO e23smtp03.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965168AbcBQDqB (ORCPT ); Tue, 16 Feb 2016 22:46:01 -0500 Received: from localhost by e23smtp03.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Wed, 17 Feb 2016 13:45:57 +1000 X-IBM-Helo: d23dlp02.au.ibm.com X-IBM-MailFrom: gwshan@linux.vnet.ibm.com X-IBM-RcptTo: devicetree@vger.kernel.org;linux-pci@vger.kernel.org Received: from d23relay10.au.ibm.com (d23relay10.au.ibm.com [9.190.26.77]) by d23dlp02.au.ibm.com (Postfix) with ESMTP id 071872BB005B; Wed, 17 Feb 2016 14:45:57 +1100 (EST) Received: from d23av01.au.ibm.com (d23av01.au.ibm.com [9.190.234.96]) by d23relay10.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u1H3jnp563701104; Wed, 17 Feb 2016 14:45:57 +1100 Received: from d23av01.au.ibm.com (localhost [127.0.0.1]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u1H3jId0013151; Wed, 17 Feb 2016 14:45:24 +1100 Received: from ozlabs.au.ibm.com (ozlabs.au.ibm.com [9.192.253.14]) by d23av01.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u1H3jH2V011976; Wed, 17 Feb 2016 14:45:18 +1100 Received: from bran.ozlabs.ibm.com (haven.au.ibm.com [9.192.254.114]) by ozlabs.au.ibm.com (Postfix) with ESMTP id B9A3CA03F2; Wed, 17 Feb 2016 14:44:44 +1100 (AEDT) Received: from gwshan (shangw.ozlabs.ibm.com [10.61.2.199]) by bran.ozlabs.ibm.com (Postfix) with ESMTP id B2672E39C0; Wed, 17 Feb 2016 14:44:44 +1100 (AEDT) Received: by gwshan (Postfix, from userid 1000) id 9A28A941E93; Wed, 17 Feb 2016 14:44:44 +1100 (AEDT) From: Gavin Shan To: linuxppc-dev@lists.ozlabs.org Cc: linux-pci@vger.kernel.org, devicetree@vger.kernel.org, benh@kernel.crashing.org, mpe@ellerman.id.au, aik@ozlabs.ru, dja@axtens.net, bhelgaas@google.com, robherring2@gmail.com, grant.likely@linaro.org, Gavin Shan Subject: [PATCH v8 38/45] powerpc/powernv: Functions to get/set PCI slot status Date: Wed, 17 Feb 2016 14:44:21 +1100 Message-Id: <1455680668-23298-39-git-send-email-gwshan@linux.vnet.ibm.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1455680668-23298-1-git-send-email-gwshan@linux.vnet.ibm.com> References: <1455680668-23298-1-git-send-email-gwshan@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16021703-0009-0000-0000-000002FF06D2 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, 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 This exports 4 functins, which base on the corresponding OPAL APIs to get/set PCI slot status. Those functions are going to be used by PowerNV PCI hotplug driver: pnv_pci_get_device_tree() opal_get_device_tree() pnv_pci_get_presence_state() opal_pci_get_presence_state() pnv_pci_get_power_state() opal_pci_get_power_state() pnv_pci_set_power_state() opal_pci_set_power_state() Besides, the patch also exports pnv_pci_hotplug_notifier_{register, unregister}() to allow registration and unregistration of PCI hotplug notifier, which will be used to receive PCI hotplug message from skiboot firmware in PowerNV PCI hotplug driver. Signed-off-by: Gavin Shan Reviewed-by: Alexey Kardashevskiy --- arch/powerpc/include/asm/opal-api.h | 17 ++++++- arch/powerpc/include/asm/opal.h | 4 ++ arch/powerpc/include/asm/pnv-pci.h | 7 +++ arch/powerpc/platforms/powernv/opal-wrappers.S | 4 ++ arch/powerpc/platforms/powernv/pci.c | 66 ++++++++++++++++++++++++++ 5 files changed, 97 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/opal-api.h b/arch/powerpc/include/asm/opal-api.h index f8faaae..a6af338 100644 --- a/arch/powerpc/include/asm/opal-api.h +++ b/arch/powerpc/include/asm/opal-api.h @@ -158,7 +158,11 @@ #define OPAL_LEDS_SET_INDICATOR 115 #define OPAL_CEC_REBOOT2 116 #define OPAL_CONSOLE_FLUSH 117 -#define OPAL_LAST 117 +#define OPAL_GET_DEVICE_TREE 118 +#define OPAL_PCI_GET_PRESENCE_STATE 119 +#define OPAL_PCI_GET_POWER_STATE 120 +#define OPAL_PCI_SET_POWER_STATE 121 +#define OPAL_LAST 121 /* Device tree flags */ @@ -344,6 +348,16 @@ enum OpalPciResetState { OPAL_ASSERT_RESET = 1 }; +enum OpalPciSlotPresentenceState { + OPAL_PCI_SLOT_EMPTY = 0, + OPAL_PCI_SLOT_PRESENT = 1 +}; + +enum OpalPciSlotPowerState { + OPAL_PCI_SLOT_POWER_OFF = 0, + OPAL_PCI_SLOT_POWER_ON = 1 +}; + enum OpalSlotLedType { OPAL_SLOT_LED_TYPE_ID = 0, /* IDENTIFY LED */ OPAL_SLOT_LED_TYPE_FAULT = 1, /* FAULT LED */ @@ -378,6 +392,7 @@ enum opal_msg_type { OPAL_MSG_DPO, OPAL_MSG_PRD, OPAL_MSG_OCC, + OPAL_MSG_PCI_HOTPLUG, OPAL_MSG_TYPE_MAX, }; diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h index 9e0039f..899bcb941 100644 --- a/arch/powerpc/include/asm/opal.h +++ b/arch/powerpc/include/asm/opal.h @@ -209,6 +209,10 @@ int64_t opal_flash_write(uint64_t id, uint64_t offset, uint64_t buf, uint64_t size, uint64_t token); int64_t opal_flash_erase(uint64_t id, uint64_t offset, uint64_t size, uint64_t token); +int64_t opal_get_device_tree(uint32_t phandle, uint64_t buf, uint64_t len); +int64_t opal_pci_get_presence_state(uint64_t id, uint8_t *state); +int64_t opal_pci_get_power_state(uint64_t id, uint8_t *state); +int64_t opal_pci_set_power_state(uint64_t id, uint8_t state); /* Internal functions */ extern int early_init_dt_scan_opal(unsigned long node, const char *uname, diff --git a/arch/powerpc/include/asm/pnv-pci.h b/arch/powerpc/include/asm/pnv-pci.h index 6f77f71..d9d095b 100644 --- a/arch/powerpc/include/asm/pnv-pci.h +++ b/arch/powerpc/include/asm/pnv-pci.h @@ -13,6 +13,13 @@ #include #include +extern int pnv_pci_get_device_tree(uint32_t phandle, void *buf, uint64_t len); +extern int pnv_pci_get_presence_state(uint64_t id, uint8_t *state); +extern int pnv_pci_get_power_state(uint64_t id, uint8_t *state); +extern int pnv_pci_set_power_state(uint64_t id, uint8_t state); +extern int pnv_pci_hotplug_notifier_register(struct notifier_block *nb); +extern int pnv_pci_hotplug_notifier_unregister(struct notifier_block *nb); + int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode); int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq, unsigned int virq); diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S index e45b88a..3ea1a855 100644 --- a/arch/powerpc/platforms/powernv/opal-wrappers.S +++ b/arch/powerpc/platforms/powernv/opal-wrappers.S @@ -302,3 +302,7 @@ OPAL_CALL(opal_prd_msg, OPAL_PRD_MSG); OPAL_CALL(opal_leds_get_ind, OPAL_LEDS_GET_INDICATOR); OPAL_CALL(opal_leds_set_ind, OPAL_LEDS_SET_INDICATOR); OPAL_CALL(opal_console_flush, OPAL_CONSOLE_FLUSH); +OPAL_CALL(opal_get_device_tree, OPAL_GET_DEVICE_TREE); +OPAL_CALL(opal_pci_get_presence_state, OPAL_PCI_GET_PRESENCE_STATE); +OPAL_CALL(opal_pci_get_power_state, OPAL_PCI_GET_POWER_STATE); +OPAL_CALL(opal_pci_set_power_state, OPAL_PCI_SET_POWER_STATE); diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c index a458703..206385f 100644 --- a/arch/powerpc/platforms/powernv/pci.c +++ b/arch/powerpc/platforms/powernv/pci.c @@ -63,6 +63,72 @@ int pnv_pci_poll(uint64_t id, int64_t rval, uint8_t *state) return (rval == OPAL_SUCCESS) ? 0 : -EIO; } +int pnv_pci_get_device_tree(uint32_t phandle, void *buf, uint64_t len) +{ + int64_t rc; + + if (!opal_check_token(OPAL_GET_DEVICE_TREE)) + return -ENXIO; + + rc = opal_get_device_tree(phandle, (uint64_t)buf, len); + if (rc != OPAL_SUCCESS) + return -EIO; + + return 0; +} +EXPORT_SYMBOL_GPL(pnv_pci_get_device_tree); + +int pnv_pci_get_presence_state(uint64_t id, uint8_t *state) +{ + int64_t rc; + + if (!opal_check_token(OPAL_PCI_GET_PRESENCE_STATE)) + return -ENXIO; + + rc = opal_pci_get_presence_state(id, state); + if (rc != OPAL_SUCCESS) + return -EIO; + + return 0; +} +EXPORT_SYMBOL_GPL(pnv_pci_get_presence_state); + +int pnv_pci_get_power_state(uint64_t id, uint8_t *state) +{ + int64_t rc; + + if (!opal_check_token(OPAL_PCI_GET_POWER_STATE)) + return -ENXIO; + + rc = opal_pci_get_power_state(id, state); + return pnv_pci_poll(id, rc, state); +} +EXPORT_SYMBOL_GPL(pnv_pci_get_power_state); + +int pnv_pci_set_power_state(uint64_t id, uint8_t state) +{ + int64_t rc; + + if (!opal_check_token(OPAL_PCI_SET_POWER_STATE)) + return -ENXIO; + + rc = opal_pci_set_power_state(id, state); + return pnv_pci_poll(id, rc, NULL); +} +EXPORT_SYMBOL_GPL(pnv_pci_set_power_state); + +int pnv_pci_hotplug_notifier_register(struct notifier_block *nb) +{ + return opal_message_notifier_register(OPAL_MSG_PCI_HOTPLUG, nb); +} +EXPORT_SYMBOL_GPL(pnv_pci_hotplug_notifier_register); + +int pnv_pci_hotplug_notifier_unregister(struct notifier_block *nb) +{ + return opal_message_notifier_unregister(OPAL_MSG_PCI_HOTPLUG, nb); +} +EXPORT_SYMBOL_GPL(pnv_pci_hotplug_notifier_unregister); + #ifdef CONFIG_PCI_MSI int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type) {