diff options
author | Pierre Morel <pmorel@linux.ibm.com> | 2020-02-10 17:53:25 +0100 |
---|---|---|
committer | Vasily Gorbik <gor@linux.ibm.com> | 2020-03-10 15:16:25 +0100 |
commit | 035f212fa7f21035537cf6dea620fe5653191eb6 (patch) | |
tree | 451929dd5f1885a437d587572a31b7b48cddc1d3 /drivers/pci | |
parent | s390/qdio: export SSQD via debugfs (diff) | |
download | linux-035f212fa7f21035537cf6dea620fe5653191eb6.tar.xz linux-035f212fa7f21035537cf6dea620fe5653191eb6.zip |
s390/pci: embedding hotplug_slot in zdev
Embedding the hotplug_slot in zdev structure allows to
greatly simplify the hotplug handling by eliminating
the handling of the slot_list.
Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'drivers/pci')
-rw-r--r-- | drivers/pci/hotplug/s390_pci_hpc.c | 99 |
1 files changed, 29 insertions, 70 deletions
diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c index 30ee72268790..39295d88f670 100644 --- a/drivers/pci/hotplug/s390_pci_hpc.c +++ b/drivers/pci/hotplug/s390_pci_hpc.c @@ -19,7 +19,6 @@ #include <asm/sclp.h> #define SLOT_NAME_SIZE 10 -static LIST_HEAD(s390_hotplug_slot_list); static int zpci_fn_configured(enum zpci_state state) { @@ -27,97 +26,86 @@ static int zpci_fn_configured(enum zpci_state state) state == ZPCI_FN_STATE_ONLINE; } -/* - * struct slot - slot information for each *physical* slot - */ -struct slot { - struct list_head slot_list; - struct hotplug_slot hotplug_slot; - struct zpci_dev *zdev; -}; - -static inline struct slot *to_slot(struct hotplug_slot *hotplug_slot) +static inline int zdev_configure(struct zpci_dev *zdev) { - return container_of(hotplug_slot, struct slot, hotplug_slot); -} - -static inline int slot_configure(struct slot *slot) -{ - int ret = sclp_pci_configure(slot->zdev->fid); + int ret = sclp_pci_configure(zdev->fid); - zpci_dbg(3, "conf fid:%x, rc:%d\n", slot->zdev->fid, ret); + zpci_dbg(3, "conf fid:%x, rc:%d\n", zdev->fid, ret); if (!ret) - slot->zdev->state = ZPCI_FN_STATE_CONFIGURED; + zdev->state = ZPCI_FN_STATE_CONFIGURED; return ret; } -static inline int slot_deconfigure(struct slot *slot) +static inline int zdev_deconfigure(struct zpci_dev *zdev) { - int ret = sclp_pci_deconfigure(slot->zdev->fid); + int ret = sclp_pci_deconfigure(zdev->fid); - zpci_dbg(3, "deconf fid:%x, rc:%d\n", slot->zdev->fid, ret); + zpci_dbg(3, "deconf fid:%x, rc:%d\n", zdev->fid, ret); if (!ret) - slot->zdev->state = ZPCI_FN_STATE_STANDBY; + zdev->state = ZPCI_FN_STATE_STANDBY; return ret; } static int enable_slot(struct hotplug_slot *hotplug_slot) { - struct slot *slot = to_slot(hotplug_slot); + struct zpci_dev *zdev = container_of(hotplug_slot, struct zpci_dev, + hotplug_slot); int rc; - if (slot->zdev->state != ZPCI_FN_STATE_STANDBY) + if (zdev->state != ZPCI_FN_STATE_STANDBY) return -EIO; - rc = slot_configure(slot); + rc = zdev_configure(zdev); if (rc) return rc; - rc = zpci_enable_device(slot->zdev); + rc = zpci_enable_device(zdev); if (rc) goto out_deconfigure; - pci_scan_slot(slot->zdev->bus, ZPCI_DEVFN); + pci_scan_slot(zdev->bus, ZPCI_DEVFN); pci_lock_rescan_remove(); - pci_bus_add_devices(slot->zdev->bus); + pci_bus_add_devices(zdev->bus); pci_unlock_rescan_remove(); return rc; out_deconfigure: - slot_deconfigure(slot); + zdev_deconfigure(zdev); return rc; } static int disable_slot(struct hotplug_slot *hotplug_slot) { - struct slot *slot = to_slot(hotplug_slot); + struct zpci_dev *zdev = container_of(hotplug_slot, struct zpci_dev, + hotplug_slot); struct pci_dev *pdev; int rc; - if (!zpci_fn_configured(slot->zdev->state)) + if (!zpci_fn_configured(zdev->state)) return -EIO; - pdev = pci_get_slot(slot->zdev->bus, ZPCI_DEVFN); + pdev = pci_get_slot(zdev->bus, ZPCI_DEVFN); if (pdev) { pci_stop_and_remove_bus_device_locked(pdev); pci_dev_put(pdev); } - rc = zpci_disable_device(slot->zdev); + rc = zpci_disable_device(zdev); if (rc) return rc; - return slot_deconfigure(slot); + return zdev_deconfigure(zdev); } static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) { - struct slot *slot = to_slot(hotplug_slot); + struct zpci_dev *zdev = container_of(hotplug_slot, struct zpci_dev, + hotplug_slot); - switch (slot->zdev->state) { + switch (zdev->state) { case ZPCI_FN_STATE_STANDBY: *value = 0; break; @@ -145,44 +133,15 @@ static const struct hotplug_slot_ops s390_hotplug_slot_ops = { int zpci_init_slot(struct zpci_dev *zdev) { char name[SLOT_NAME_SIZE]; - struct slot *slot; - int rc; - if (!zdev) - return 0; - - slot = kzalloc(sizeof(*slot), GFP_KERNEL); - if (!slot) - goto error; - - slot->zdev = zdev; - slot->hotplug_slot.ops = &s390_hotplug_slot_ops; + zdev->hotplug_slot.ops = &s390_hotplug_slot_ops; snprintf(name, SLOT_NAME_SIZE, "%08x", zdev->fid); - rc = pci_hp_register(&slot->hotplug_slot, zdev->bus, - ZPCI_DEVFN, name); - if (rc) - goto error_reg; - - list_add(&slot->slot_list, &s390_hotplug_slot_list); - return 0; - -error_reg: - kfree(slot); -error: - return -ENOMEM; + return pci_hp_register(&zdev->hotplug_slot, zdev->bus, + ZPCI_DEVFN, name); } void zpci_exit_slot(struct zpci_dev *zdev) { - struct slot *slot, *next; - - list_for_each_entry_safe(slot, next, &s390_hotplug_slot_list, - slot_list) { - if (slot->zdev != zdev) - continue; - list_del(&slot->slot_list); - pci_hp_deregister(&slot->hotplug_slot); - kfree(slot); - } + pci_hp_deregister(&zdev->hotplug_slot); } |