diff options
| author | Jan Glauber <jang@linux.vnet.ibm.com> | 2012-11-29 14:35:47 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2012-11-30 17:47:25 +0100 |
| commit | 7441b0627e2251370902305a204e1330a696ca04 (patch) | |
| tree | d3a36466a8517f8b889b6f0037f15280e33302d4 /arch/s390/pci | |
| parent | s390/pci: CHSC PCI support for error and availability events (diff) | |
| download | linux-7441b0627e2251370902305a204e1330a696ca04.tar.xz linux-7441b0627e2251370902305a204e1330a696ca04.zip | |
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/<fid>/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 <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/pci')
| -rw-r--r-- | arch/s390/pci/pci.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c index 5a2ef9e75c97..c523594a6d45 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); |