From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/powerpc/kernel/eeh_dev.c | 80 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 arch/powerpc/kernel/eeh_dev.c (limited to 'arch/powerpc/kernel/eeh_dev.c') diff --git a/arch/powerpc/kernel/eeh_dev.c b/arch/powerpc/kernel/eeh_dev.c new file mode 100644 index 000000000..a34e6912c --- /dev/null +++ b/arch/powerpc/kernel/eeh_dev.c @@ -0,0 +1,80 @@ +/* + * The file intends to implement dynamic creation of EEH device, which will + * be bound with OF node and PCI device simutaneously. The EEH devices would + * be foundamental information for EEH core components to work proerly. Besides, + * We have to support multiple situations where dynamic creation of EEH device + * is required: + * + * 1) Before PCI emunation starts, we need create EEH devices according to the + * PCI sensitive OF nodes. + * 2) When PCI emunation is done, we need do the binding between PCI device and + * the associated EEH device. + * 3) DR (Dynamic Reconfiguration) would create PCI sensitive OF node. EEH device + * will be created while PCI sensitive OF node is detected from DR. + * 4) PCI hotplug needs redoing the binding between PCI device and EEH device. If + * PHB is newly inserted, we also need create EEH devices accordingly. + * + * Copyright Benjamin Herrenschmidt & Gavin Shan, IBM Corporation 2012. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include +#include +#include +#include +#include +#include + +#include +#include + +/** + * eeh_dev_init - Create EEH device according to OF node + * @pdn: PCI device node + * + * It will create EEH device according to the given OF node. The function + * might be called by PCI emunation, DR, PHB hotplug. + */ +struct eeh_dev *eeh_dev_init(struct pci_dn *pdn) +{ + struct eeh_dev *edev; + + /* Allocate EEH device */ + edev = kzalloc(sizeof(*edev), GFP_KERNEL); + if (!edev) + return NULL; + + /* Associate EEH device with OF node */ + pdn->edev = edev; + edev->pdn = pdn; + INIT_LIST_HEAD(&edev->list); + INIT_LIST_HEAD(&edev->rmv_list); + + return edev; +} + +/** + * eeh_dev_phb_init_dynamic - Create EEH devices for devices included in PHB + * @phb: PHB + * + * Scan the PHB OF node and its child association, then create the + * EEH devices accordingly + */ +void eeh_dev_phb_init_dynamic(struct pci_controller *phb) +{ + /* EEH PE for PHB */ + eeh_phb_pe_create(phb); +} -- cgit v1.2.3