From 7441b0627e2251370902305a204e1330a696ca04 Mon Sep 17 00:00:00 2001 From: Jan Glauber Date: Thu, 29 Nov 2012 14:35:47 +0100 Subject: s390/pci: PCI hotplug support via SCLP Add SCLP PCI configure/deconfigure and implement a PCI hotplug controller (s390_pci_hpc). The hotplug controller creates a slot for every PCI function in stand-by or configured state. The PCI functions are named after the PCI function ID (fid). By writing to the power attribute in /sys/bus/pci/slots//power the PCI function is moved to stand-by or configured state. If moved to the configured state the device is automatically scanned by the s390 PCI layer. Signed-off-by: Jan Glauber Signed-off-by: Martin Schwidefsky --- arch/s390/pci/pci.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'arch/s390/pci/pci.c') diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index 5a2ef9e75c9..c523594a6d4 100644 --- a/arch/s390/pci/pci.c +++ b/arch/s390/pci/pci.c @@ -47,7 +47,12 @@ /* list of all detected zpci devices */ LIST_HEAD(zpci_list); +EXPORT_SYMBOL_GPL(zpci_list); DEFINE_MUTEX(zpci_list_lock); +EXPORT_SYMBOL_GPL(zpci_list_lock); + +struct pci_hp_callback_ops hotplug_ops; +EXPORT_SYMBOL_GPL(hotplug_ops); static DECLARE_BITMAP(zpci_domain, ZPCI_NR_DEVICES); static DEFINE_SPINLOCK(zpci_domain_lock); @@ -935,6 +940,8 @@ int zpci_create_device(struct zpci_dev *zdev) mutex_lock(&zpci_list_lock); list_add_tail(&zdev->entry, &zpci_list); + if (hotplug_ops.create_slot) + hotplug_ops.create_slot(zdev); mutex_unlock(&zpci_list_lock); if (zdev->state == ZPCI_FN_STATE_STANDBY) @@ -948,6 +955,8 @@ int zpci_create_device(struct zpci_dev *zdev) out_start: mutex_lock(&zpci_list_lock); list_del(&zdev->entry); + if (hotplug_ops.remove_slot) + hotplug_ops.remove_slot(zdev); mutex_unlock(&zpci_list_lock); out_bus: zpci_free_domain(zdev); -- cgit v1.2.3-70-g09d2