[PATCH] PCI Hotplug: more CPCI updates
Here is my third attempt at a patch to further update the CompactPCI hotplug driver infrastructure to address the pci_enable_device issue discussed on the list as well as a few other issues I discovered during some more testing. This version addresses a few more issues pointed out by Prarit Bhargava. Changes include: - cpci_enable_device and its recursive calling of pci_enable_device on new devices removed. - Use list_rwsem to avoid slot status change races between disable_slot and check_slots. - Fixed oopsing in cpci_hp_unregister_bus caused by calling list_del on a slot after calling pci_hp_deregister. - Removed kfree calls in cleanup_slots since release_slot will have done it already. - Reworked init_slots a bit to fix latch and adapter file updating on subsequent calls to cpci_hp_start. - Improved sanity checking in cpci_hp_register_controller. - Now shut things down correctly in cpci_hotplug_exit. - Switch to pci_get_slot instead of deprecated pci_find_slot. - A bunch of CodingStyle fixes. Signed-off-by: Scott Murray <scottm@somanetworks.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
parent
af00f9811e
commit
bcc488ab02
2 changed files with 195 additions and 257 deletions
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@ -1,7 +1,7 @@
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/*
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* CompactPCI Hot Plug Driver
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*
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* Copyright (C) 2002 SOMA Networks, Inc.
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* Copyright (C) 2002,2005 SOMA Networks, Inc.
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* Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2001 IBM Corp.
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*
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@ -45,10 +45,10 @@
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#define dbg(format, arg...) \
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do { \
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if(cpci_debug) \
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if (cpci_debug) \
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printk (KERN_DEBUG "%s: " format "\n", \
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MY_NAME , ## arg); \
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} while(0)
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} while (0)
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#define err(format, arg...) printk(KERN_ERR "%s: " format "\n", MY_NAME , ## arg)
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#define info(format, arg...) printk(KERN_INFO "%s: " format "\n", MY_NAME , ## arg)
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#define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME , ## arg)
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@ -111,10 +111,8 @@ enable_slot(struct hotplug_slot *hotplug_slot)
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dbg("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
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if(controller->ops->set_power) {
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if (controller->ops->set_power)
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retval = controller->ops->set_power(slot, 1);
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}
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return retval;
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}
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@ -126,37 +124,41 @@ disable_slot(struct hotplug_slot *hotplug_slot)
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dbg("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
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down_write(&list_rwsem);
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/* Unconfigure device */
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dbg("%s - unconfiguring slot %s",
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__FUNCTION__, slot->hotplug_slot->name);
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if((retval = cpci_unconfigure_slot(slot))) {
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if ((retval = cpci_unconfigure_slot(slot))) {
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err("%s - could not unconfigure slot %s",
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__FUNCTION__, slot->hotplug_slot->name);
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return retval;
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goto disable_error;
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}
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dbg("%s - finished unconfiguring slot %s",
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__FUNCTION__, slot->hotplug_slot->name);
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/* Clear EXT (by setting it) */
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if(cpci_clear_ext(slot)) {
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if (cpci_clear_ext(slot)) {
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err("%s - could not clear EXT for slot %s",
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__FUNCTION__, slot->hotplug_slot->name);
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retval = -ENODEV;
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goto disable_error;
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}
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cpci_led_on(slot);
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if(controller->ops->set_power) {
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retval = controller->ops->set_power(slot, 0);
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}
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if (controller->ops->set_power)
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if ((retval = controller->ops->set_power(slot, 0)))
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goto disable_error;
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if(update_adapter_status(slot->hotplug_slot, 0)) {
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if (update_adapter_status(slot->hotplug_slot, 0))
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warn("failure to update adapter file");
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}
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if(slot->extracting) {
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if (slot->extracting) {
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slot->extracting = 0;
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atomic_dec(&extracting);
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}
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disable_error:
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up_write(&list_rwsem);
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return retval;
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}
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@ -165,9 +167,8 @@ cpci_get_power_status(struct slot *slot)
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{
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u8 power = 1;
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if(controller->ops->get_power) {
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if (controller->ops->get_power)
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power = controller->ops->get_power(slot);
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}
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return power;
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}
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@ -237,9 +238,8 @@ cpci_hp_register_bus(struct pci_bus *bus, u8 first, u8 last)
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int status = -ENOMEM;
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int i;
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if(!(controller && bus)) {
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if (!(controller && bus))
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return -ENODEV;
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}
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/*
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* Create a structure for each slot, and register that slot
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@ -316,32 +316,30 @@ int
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cpci_hp_unregister_bus(struct pci_bus *bus)
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{
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struct slot *slot;
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struct list_head *tmp;
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struct list_head *next;
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int status;
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struct slot *tmp;
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int status = 0;
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down_write(&list_rwsem);
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if(!slots) {
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if (!slots) {
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up_write(&list_rwsem);
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return -1;
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}
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list_for_each_safe(tmp, next, &slot_list) {
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slot = list_entry(tmp, struct slot, slot_list);
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if(slot->bus == bus) {
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dbg("deregistering slot %s", slot->hotplug_slot->name);
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status = pci_hp_deregister(slot->hotplug_slot);
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if(status) {
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err("pci_hp_deregister failed with error %d",
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status);
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return status;
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}
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list_for_each_entry_safe(slot, tmp, &slot_list, slot_list) {
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if (slot->bus == bus) {
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list_del(&slot->slot_list);
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slots--;
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dbg("deregistering slot %s", slot->hotplug_slot->name);
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status = pci_hp_deregister(slot->hotplug_slot);
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if (status) {
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err("pci_hp_deregister failed with error %d",
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status);
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break;
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}
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}
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}
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up_write(&list_rwsem);
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return 0;
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return status;
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}
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/* This is the interrupt mode interrupt handler */
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@ -351,7 +349,7 @@ cpci_hp_intr(int irq, void *data, struct pt_regs *regs)
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dbg("entered cpci_hp_intr");
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/* Check to see if it was our interrupt */
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if((controller->irq_flags & SA_SHIRQ) &&
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if ((controller->irq_flags & SA_SHIRQ) &&
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!controller->ops->check_irq(controller->dev_id)) {
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dbg("exited cpci_hp_intr, not our interrupt");
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return IRQ_NONE;
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@ -373,38 +371,30 @@ cpci_hp_intr(int irq, void *data, struct pt_regs *regs)
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* INS bits of the cold-inserted devices.
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*/
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static int
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init_slots(void)
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init_slots(int clear_ins)
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{
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struct slot *slot;
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struct list_head *tmp;
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struct pci_dev* dev;
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dbg("%s - enter", __FUNCTION__);
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down_read(&list_rwsem);
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if(!slots) {
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if (!slots) {
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up_read(&list_rwsem);
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return -1;
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}
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list_for_each(tmp, &slot_list) {
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slot = list_entry(tmp, struct slot, slot_list);
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list_for_each_entry(slot, &slot_list, slot_list) {
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dbg("%s - looking at slot %s",
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__FUNCTION__, slot->hotplug_slot->name);
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if(cpci_check_and_clear_ins(slot)) {
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if (clear_ins && cpci_check_and_clear_ins(slot))
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dbg("%s - cleared INS for slot %s",
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__FUNCTION__, slot->hotplug_slot->name);
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dev = pci_find_slot(slot->bus->number, PCI_DEVFN(slot->number, 0));
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if(dev) {
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if(update_adapter_status(slot->hotplug_slot, 1)) {
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warn("failure to update adapter file");
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}
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if(update_latch_status(slot->hotplug_slot, 1)) {
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warn("failure to update latch file");
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}
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slot->dev = dev;
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} else {
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err("%s - no driver attached to device in slot %s",
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__FUNCTION__, slot->hotplug_slot->name);
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}
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dev = pci_get_slot(slot->bus, PCI_DEVFN(slot->number, 0));
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if (dev) {
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if (update_adapter_status(slot->hotplug_slot, 1))
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warn("failure to update adapter file");
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if (update_latch_status(slot->hotplug_slot, 1))
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warn("failure to update latch file");
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slot->dev = dev;
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}
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}
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up_read(&list_rwsem);
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@ -416,26 +406,28 @@ static int
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check_slots(void)
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{
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struct slot *slot;
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struct list_head *tmp;
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int extracted;
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int inserted;
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u16 hs_csr;
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down_read(&list_rwsem);
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if(!slots) {
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if (!slots) {
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up_read(&list_rwsem);
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err("no slots registered, shutting down");
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return -1;
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}
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extracted = inserted = 0;
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list_for_each(tmp, &slot_list) {
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slot = list_entry(tmp, struct slot, slot_list);
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list_for_each_entry(slot, &slot_list, slot_list) {
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dbg("%s - looking at slot %s",
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__FUNCTION__, slot->hotplug_slot->name);
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if(cpci_check_and_clear_ins(slot)) {
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/* Some broken hardware (e.g. PLX 9054AB) asserts ENUM# twice... */
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if(slot->dev) {
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warn("slot %s already inserted", slot->hotplug_slot->name);
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if (cpci_check_and_clear_ins(slot)) {
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/*
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* Some broken hardware (e.g. PLX 9054AB) asserts
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* ENUM# twice...
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*/
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if (slot->dev) {
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warn("slot %s already inserted",
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slot->hotplug_slot->name);
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inserted++;
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continue;
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}
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/* Configure device */
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dbg("%s - configuring slot %s",
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__FUNCTION__, slot->hotplug_slot->name);
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if(cpci_configure_slot(slot)) {
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if (cpci_configure_slot(slot)) {
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err("%s - could not configure slot %s",
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__FUNCTION__, slot->hotplug_slot->name);
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continue;
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dbg("%s - slot %s HS_CSR (2) = %04x",
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__FUNCTION__, slot->hotplug_slot->name, hs_csr);
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if(update_latch_status(slot->hotplug_slot, 1)) {
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if (update_latch_status(slot->hotplug_slot, 1))
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warn("failure to update latch file");
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}
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if(update_adapter_status(slot->hotplug_slot, 1)) {
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if (update_adapter_status(slot->hotplug_slot, 1))
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warn("failure to update adapter file");
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}
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cpci_led_off(slot);
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__FUNCTION__, slot->hotplug_slot->name, hs_csr);
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inserted++;
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} else if(cpci_check_ext(slot)) {
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} else if (cpci_check_ext(slot)) {
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/* Process extraction request */
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dbg("%s - slot %s extracted",
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__FUNCTION__, slot->hotplug_slot->name);
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dbg("%s - slot %s HS_CSR = %04x",
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__FUNCTION__, slot->hotplug_slot->name, hs_csr);
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if(!slot->extracting) {
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if(update_latch_status(slot->hotplug_slot, 0)) {
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if (!slot->extracting) {
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if (update_latch_status(slot->hotplug_slot, 0)) {
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warn("failure to update latch file");
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}
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atomic_inc(&extracting);
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slot->extracting = 1;
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atomic_inc(&extracting);
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}
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extracted++;
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} else if(slot->extracting) {
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} else if (slot->extracting) {
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hs_csr = cpci_get_hs_csr(slot);
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if(hs_csr == 0xffff) {
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if (hs_csr == 0xffff) {
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/*
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* Hmmm, we're likely hosed at this point, should we
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* bother trying to tell the driver or not?
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*/
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err("card in slot %s was improperly removed",
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slot->hotplug_slot->name);
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if(update_adapter_status(slot->hotplug_slot, 0)) {
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if (update_adapter_status(slot->hotplug_slot, 0))
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warn("failure to update adapter file");
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}
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slot->extracting = 0;
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atomic_dec(&extracting);
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}
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@ -520,10 +508,9 @@ check_slots(void)
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up_read(&list_rwsem);
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dbg("inserted=%d, extracted=%d, extracting=%d",
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inserted, extracted, atomic_read(&extracting));
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if(inserted || extracted) {
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if (inserted || extracted)
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return extracted;
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}
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else if(!atomic_read(&extracting)) {
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else if (!atomic_read(&extracting)) {
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err("cannot find ENUM# source, shutting down");
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return -1;
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}
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@ -541,12 +528,12 @@ event_thread(void *data)
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unlock_kernel();
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dbg("%s - event thread started", __FUNCTION__);
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while(1) {
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while (1) {
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dbg("event thread sleeping");
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down_interruptible(&event_semaphore);
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dbg("event thread woken, thread_finished = %d",
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thread_finished);
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if(thread_finished || signal_pending(current))
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if (thread_finished || signal_pending(current))
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break;
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do {
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rc = check_slots();
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@ -558,7 +545,9 @@ event_thread(void *data)
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thread_finished = 1;
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break;
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}
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} while(atomic_read(&extracting) != 0);
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} while (atomic_read(&extracting) && !thread_finished);
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if (thread_finished)
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break;
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/* Re-enable ENUM# interrupt */
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dbg("%s - re-enabling irq", __FUNCTION__);
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@ -579,21 +568,21 @@ poll_thread(void *data)
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daemonize("cpci_hp_polld");
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unlock_kernel();
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while(1) {
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if(thread_finished || signal_pending(current))
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while (1) {
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if (thread_finished || signal_pending(current))
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break;
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if(controller->ops->query_enum()) {
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if (controller->ops->query_enum()) {
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do {
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rc = check_slots();
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if(rc > 0) {
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if (rc > 0) {
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/* Give userspace a chance to handle extraction */
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msleep(500);
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} else if(rc < 0) {
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} else if (rc < 0) {
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dbg("%s - error checking slots", __FUNCTION__);
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thread_finished = 1;
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break;
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}
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} while(atomic_read(&extracting) != 0);
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} while (atomic_read(&extracting) && !thread_finished);
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}
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msleep(100);
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}
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@ -612,12 +601,11 @@ cpci_start_thread(void)
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init_MUTEX_LOCKED(&thread_exit);
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thread_finished = 0;
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if(controller->irq) {
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if (controller->irq)
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pid = kernel_thread(event_thread, NULL, 0);
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} else {
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else
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pid = kernel_thread(poll_thread, NULL, 0);
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}
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if(pid < 0) {
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if (pid < 0) {
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err("Can't start up our thread");
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return -1;
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}
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@ -630,9 +618,8 @@ cpci_stop_thread(void)
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{
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thread_finished = 1;
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dbg("thread finish command given");
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if(controller->irq) {
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if (controller->irq)
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up(&event_semaphore);
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}
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dbg("wait for thread to exit");
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down(&thread_exit);
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}
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@ -642,45 +629,67 @@ cpci_hp_register_controller(struct cpci_hp_controller *new_controller)
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{
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int status = 0;
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if(!controller) {
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controller = new_controller;
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if(controller->irq) {
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if(request_irq(controller->irq,
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cpci_hp_intr,
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controller->irq_flags,
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MY_NAME, controller->dev_id)) {
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err("Can't get irq %d for the hotplug cPCI controller", controller->irq);
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status = -ENODEV;
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}
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dbg("%s - acquired controller irq %d", __FUNCTION__,
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controller->irq);
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if (controller)
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return -1;
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if (!(new_controller && new_controller->ops))
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return -EINVAL;
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if (new_controller->irq) {
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if (!(new_controller->ops->enable_irq &&
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new_controller->ops->disable_irq))
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status = -EINVAL;
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if (request_irq(new_controller->irq,
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cpci_hp_intr,
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new_controller->irq_flags,
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MY_NAME,
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new_controller->dev_id)) {
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err("Can't get irq %d for the hotplug cPCI controller",
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new_controller->irq);
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status = -ENODEV;
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}
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} else {
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err("cPCI hotplug controller already registered");
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status = -1;
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dbg("%s - acquired controller irq %d",
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__FUNCTION__, new_controller->irq);
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}
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if (!status)
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controller = new_controller;
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return status;
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}
|
||||
|
||||
static void
|
||||
cleanup_slots(void)
|
||||
{
|
||||
struct slot *slot;
|
||||
struct slot *tmp;
|
||||
|
||||
/*
|
||||
* Unregister all of our slots with the pci_hotplug subsystem,
|
||||
* and free up all memory that we had allocated.
|
||||
*/
|
||||
down_write(&list_rwsem);
|
||||
if (!slots)
|
||||
goto cleanup_null;
|
||||
list_for_each_entry_safe(slot, tmp, &slot_list, slot_list) {
|
||||
list_del(&slot->slot_list);
|
||||
pci_hp_deregister(slot->hotplug_slot);
|
||||
}
|
||||
cleanup_null:
|
||||
up_write(&list_rwsem);
|
||||
return;
|
||||
}
|
||||
|
||||
int
|
||||
cpci_hp_unregister_controller(struct cpci_hp_controller *old_controller)
|
||||
{
|
||||
int status = 0;
|
||||
|
||||
if(controller) {
|
||||
if(atomic_read(&extracting) != 0) {
|
||||
return -EBUSY;
|
||||
}
|
||||
if(!thread_finished) {
|
||||
if (controller) {
|
||||
if (!thread_finished)
|
||||
cpci_stop_thread();
|
||||
}
|
||||
if(controller->irq) {
|
||||
if (controller->irq)
|
||||
free_irq(controller->irq, controller->dev_id);
|
||||
}
|
||||
controller = NULL;
|
||||
} else {
|
||||
cleanup_slots();
|
||||
} else
|
||||
status = -ENODEV;
|
||||
}
|
||||
return status;
|
||||
}
|
||||
|
||||
|
@ -691,32 +700,28 @@ cpci_hp_start(void)
|
|||
int status;
|
||||
|
||||
dbg("%s - enter", __FUNCTION__);
|
||||
if(!controller) {
|
||||
if (!controller)
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
down_read(&list_rwsem);
|
||||
if(list_empty(&slot_list)) {
|
||||
if (list_empty(&slot_list)) {
|
||||
up_read(&list_rwsem);
|
||||
return -ENODEV;
|
||||
}
|
||||
up_read(&list_rwsem);
|
||||
|
||||
if(first) {
|
||||
status = init_slots();
|
||||
if(status) {
|
||||
return status;
|
||||
}
|
||||
status = init_slots(first);
|
||||
if (first)
|
||||
first = 0;
|
||||
}
|
||||
if (status)
|
||||
return status;
|
||||
|
||||
status = cpci_start_thread();
|
||||
if(status) {
|
||||
if (status)
|
||||
return status;
|
||||
}
|
||||
dbg("%s - thread started", __FUNCTION__);
|
||||
|
||||
if(controller->irq) {
|
||||
if (controller->irq) {
|
||||
/* Start enum interrupt processing */
|
||||
dbg("%s - enabling irq", __FUNCTION__);
|
||||
controller->ops->enable_irq();
|
||||
|
@ -728,13 +733,9 @@ cpci_hp_start(void)
|
|||
int
|
||||
cpci_hp_stop(void)
|
||||
{
|
||||
if(!controller) {
|
||||
if (!controller)
|
||||
return -ENODEV;
|
||||
}
|
||||
if(atomic_read(&extracting) != 0) {
|
||||
return -EBUSY;
|
||||
}
|
||||
if(controller->irq) {
|
||||
if (controller->irq) {
|
||||
/* Stop enum interrupt processing */
|
||||
dbg("%s - disabling irq", __FUNCTION__);
|
||||
controller->ops->disable_irq();
|
||||
|
@ -743,34 +744,6 @@ cpci_hp_stop(void)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static void __exit
|
||||
cleanup_slots(void)
|
||||
{
|
||||
struct list_head *tmp;
|
||||
struct slot *slot;
|
||||
|
||||
/*
|
||||
* Unregister all of our slots with the pci_hotplug subsystem,
|
||||
* and free up all memory that we had allocated.
|
||||
*/
|
||||
down_write(&list_rwsem);
|
||||
if(!slots) {
|
||||
goto null_cleanup;
|
||||
}
|
||||
list_for_each(tmp, &slot_list) {
|
||||
slot = list_entry(tmp, struct slot, slot_list);
|
||||
list_del(&slot->slot_list);
|
||||
pci_hp_deregister(slot->hotplug_slot);
|
||||
kfree(slot->hotplug_slot->info);
|
||||
kfree(slot->hotplug_slot->name);
|
||||
kfree(slot->hotplug_slot);
|
||||
kfree(slot);
|
||||
}
|
||||
null_cleanup:
|
||||
up_write(&list_rwsem);
|
||||
return;
|
||||
}
|
||||
|
||||
int __init
|
||||
cpci_hotplug_init(int debug)
|
||||
{
|
||||
|
@ -784,7 +757,8 @@ cpci_hotplug_exit(void)
|
|||
/*
|
||||
* Clean everything up.
|
||||
*/
|
||||
cleanup_slots();
|
||||
cpci_hp_stop();
|
||||
cpci_hp_unregister_controller(controller);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL_GPL(cpci_hp_register_controller);
|
||||
|
|
|
@ -1,7 +1,7 @@
|
|||
/*
|
||||
* CompactPCI Hot Plug Driver PCI functions
|
||||
*
|
||||
* Copyright (C) 2002 by SOMA Networks, Inc.
|
||||
* Copyright (C) 2002,2005 by SOMA Networks, Inc.
|
||||
*
|
||||
* All rights reserved.
|
||||
*
|
||||
|
@ -38,10 +38,10 @@ extern int cpci_debug;
|
|||
|
||||
#define dbg(format, arg...) \
|
||||
do { \
|
||||
if(cpci_debug) \
|
||||
if (cpci_debug) \
|
||||
printk (KERN_DEBUG "%s: " format "\n", \
|
||||
MY_NAME , ## arg); \
|
||||
} while(0)
|
||||
} while (0)
|
||||
#define err(format, arg...) printk(KERN_ERR "%s: " format "\n", MY_NAME , ## arg)
|
||||
#define info(format, arg...) printk(KERN_INFO "%s: " format "\n", MY_NAME , ## arg)
|
||||
#define warn(format, arg...) printk(KERN_WARNING "%s: " format "\n", MY_NAME , ## arg)
|
||||
|
@ -57,16 +57,15 @@ u8 cpci_get_attention_status(struct slot* slot)
|
|||
hs_cap = pci_bus_find_capability(slot->bus,
|
||||
slot->devfn,
|
||||
PCI_CAP_ID_CHSWP);
|
||||
if(!hs_cap) {
|
||||
if (!hs_cap)
|
||||
return 0;
|
||||
}
|
||||
|
||||
if(pci_bus_read_config_word(slot->bus,
|
||||
if (pci_bus_read_config_word(slot->bus,
|
||||
slot->devfn,
|
||||
hs_cap + 2,
|
||||
&hs_csr)) {
|
||||
&hs_csr))
|
||||
return 0;
|
||||
}
|
||||
|
||||
return hs_csr & 0x0008 ? 1 : 0;
|
||||
}
|
||||
|
||||
|
@ -78,27 +77,22 @@ int cpci_set_attention_status(struct slot* slot, int status)
|
|||
hs_cap = pci_bus_find_capability(slot->bus,
|
||||
slot->devfn,
|
||||
PCI_CAP_ID_CHSWP);
|
||||
if(!hs_cap) {
|
||||
if (!hs_cap)
|
||||
return 0;
|
||||
}
|
||||
|
||||
if(pci_bus_read_config_word(slot->bus,
|
||||
if (pci_bus_read_config_word(slot->bus,
|
||||
slot->devfn,
|
||||
hs_cap + 2,
|
||||
&hs_csr)) {
|
||||
&hs_csr))
|
||||
return 0;
|
||||
}
|
||||
if(status) {
|
||||
if (status)
|
||||
hs_csr |= HS_CSR_LOO;
|
||||
} else {
|
||||
else
|
||||
hs_csr &= ~HS_CSR_LOO;
|
||||
}
|
||||
if(pci_bus_write_config_word(slot->bus,
|
||||
if (pci_bus_write_config_word(slot->bus,
|
||||
slot->devfn,
|
||||
hs_cap + 2,
|
||||
hs_csr)) {
|
||||
hs_csr))
|
||||
return 0;
|
||||
}
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
@ -110,16 +104,13 @@ u16 cpci_get_hs_csr(struct slot* slot)
|
|||
hs_cap = pci_bus_find_capability(slot->bus,
|
||||
slot->devfn,
|
||||
PCI_CAP_ID_CHSWP);
|
||||
if(!hs_cap) {
|
||||
if (!hs_cap)
|
||||
return 0xFFFF;
|
||||
}
|
||||
|
||||
if(pci_bus_read_config_word(slot->bus,
|
||||
if (pci_bus_read_config_word(slot->bus,
|
||||
slot->devfn,
|
||||
hs_cap + 2,
|
||||
&hs_csr)) {
|
||||
&hs_csr))
|
||||
return 0xFFFF;
|
||||
}
|
||||
return hs_csr;
|
||||
}
|
||||
|
||||
|
@ -132,24 +123,22 @@ int cpci_check_and_clear_ins(struct slot* slot)
|
|||
hs_cap = pci_bus_find_capability(slot->bus,
|
||||
slot->devfn,
|
||||
PCI_CAP_ID_CHSWP);
|
||||
if(!hs_cap) {
|
||||
if (!hs_cap)
|
||||
return 0;
|
||||
}
|
||||
if(pci_bus_read_config_word(slot->bus,
|
||||
if (pci_bus_read_config_word(slot->bus,
|
||||
slot->devfn,
|
||||
hs_cap + 2,
|
||||
&hs_csr)) {
|
||||
&hs_csr))
|
||||
return 0;
|
||||
}
|
||||
if(hs_csr & HS_CSR_INS) {
|
||||
if (hs_csr & HS_CSR_INS) {
|
||||
/* Clear INS (by setting it) */
|
||||
if(pci_bus_write_config_word(slot->bus,
|
||||
if (pci_bus_write_config_word(slot->bus,
|
||||
slot->devfn,
|
||||
hs_cap + 2,
|
||||
hs_csr)) {
|
||||
hs_csr))
|
||||
ins = 0;
|
||||
}
|
||||
ins = 1;
|
||||
else
|
||||
ins = 1;
|
||||
}
|
||||
return ins;
|
||||
}
|
||||
|
@ -163,18 +152,15 @@ int cpci_check_ext(struct slot* slot)
|
|||
hs_cap = pci_bus_find_capability(slot->bus,
|
||||
slot->devfn,
|
||||
PCI_CAP_ID_CHSWP);
|
||||
if(!hs_cap) {
|
||||
if (!hs_cap)
|
||||
return 0;
|
||||
}
|
||||
if(pci_bus_read_config_word(slot->bus,
|
||||
if (pci_bus_read_config_word(slot->bus,
|
||||
slot->devfn,
|
||||
hs_cap + 2,
|
||||
&hs_csr)) {
|
||||
&hs_csr))
|
||||
return 0;
|
||||
}
|
||||
if(hs_csr & HS_CSR_EXT) {
|
||||
if (hs_csr & HS_CSR_EXT)
|
||||
ext = 1;
|
||||
}
|
||||
return ext;
|
||||
}
|
||||
|
||||
|
@ -186,23 +172,20 @@ int cpci_clear_ext(struct slot* slot)
|
|||
hs_cap = pci_bus_find_capability(slot->bus,
|
||||
slot->devfn,
|
||||
PCI_CAP_ID_CHSWP);
|
||||
if(!hs_cap) {
|
||||
if (!hs_cap)
|
||||
return -ENODEV;
|
||||
}
|
||||
if(pci_bus_read_config_word(slot->bus,
|
||||
if (pci_bus_read_config_word(slot->bus,
|
||||
slot->devfn,
|
||||
hs_cap + 2,
|
||||
&hs_csr)) {
|
||||
&hs_csr))
|
||||
return -ENODEV;
|
||||
}
|
||||
if(hs_csr & HS_CSR_EXT) {
|
||||
if (hs_csr & HS_CSR_EXT) {
|
||||
/* Clear EXT (by setting it) */
|
||||
if(pci_bus_write_config_word(slot->bus,
|
||||
if (pci_bus_write_config_word(slot->bus,
|
||||
slot->devfn,
|
||||
hs_cap + 2,
|
||||
hs_csr)) {
|
||||
hs_csr))
|
||||
return -ENODEV;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
@ -215,18 +198,16 @@ int cpci_led_on(struct slot* slot)
|
|||
hs_cap = pci_bus_find_capability(slot->bus,
|
||||
slot->devfn,
|
||||
PCI_CAP_ID_CHSWP);
|
||||
if(!hs_cap) {
|
||||
if (!hs_cap)
|
||||
return -ENODEV;
|
||||
}
|
||||
if(pci_bus_read_config_word(slot->bus,
|
||||
if (pci_bus_read_config_word(slot->bus,
|
||||
slot->devfn,
|
||||
hs_cap + 2,
|
||||
&hs_csr)) {
|
||||
&hs_csr))
|
||||
return -ENODEV;
|
||||
}
|
||||
if((hs_csr & HS_CSR_LOO) != HS_CSR_LOO) {
|
||||
if ((hs_csr & HS_CSR_LOO) != HS_CSR_LOO) {
|
||||
hs_csr |= HS_CSR_LOO;
|
||||
if(pci_bus_write_config_word(slot->bus,
|
||||
if (pci_bus_write_config_word(slot->bus,
|
||||
slot->devfn,
|
||||
hs_cap + 2,
|
||||
hs_csr)) {
|
||||
|
@ -246,18 +227,16 @@ int cpci_led_off(struct slot* slot)
|
|||
hs_cap = pci_bus_find_capability(slot->bus,
|
||||
slot->devfn,
|
||||
PCI_CAP_ID_CHSWP);
|
||||
if(!hs_cap) {
|
||||
if (!hs_cap)
|
||||
return -ENODEV;
|
||||
}
|
||||
if(pci_bus_read_config_word(slot->bus,
|
||||
if (pci_bus_read_config_word(slot->bus,
|
||||
slot->devfn,
|
||||
hs_cap + 2,
|
||||
&hs_csr)) {
|
||||
&hs_csr))
|
||||
return -ENODEV;
|
||||
}
|
||||
if(hs_csr & HS_CSR_LOO) {
|
||||
if (hs_csr & HS_CSR_LOO) {
|
||||
hs_csr &= ~HS_CSR_LOO;
|
||||
if(pci_bus_write_config_word(slot->bus,
|
||||
if (pci_bus_write_config_word(slot->bus,
|
||||
slot->devfn,
|
||||
hs_cap + 2,
|
||||
hs_csr)) {
|
||||
|
@ -274,19 +253,6 @@ int cpci_led_off(struct slot* slot)
|
|||
* Device configuration functions
|
||||
*/
|
||||
|
||||
static void cpci_enable_device(struct pci_dev *dev)
|
||||
{
|
||||
struct pci_bus *bus;
|
||||
|
||||
pci_enable_device(dev);
|
||||
if(dev->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
|
||||
bus = dev->subordinate;
|
||||
list_for_each_entry(dev, &bus->devices, bus_list) {
|
||||
cpci_enable_device(dev);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
int cpci_configure_slot(struct slot* slot)
|
||||
{
|
||||
unsigned char busnr;
|
||||
|
@ -294,14 +260,14 @@ int cpci_configure_slot(struct slot* slot)
|
|||
|
||||
dbg("%s - enter", __FUNCTION__);
|
||||
|
||||
if(slot->dev == NULL) {
|
||||
if (slot->dev == NULL) {
|
||||
dbg("pci_dev null, finding %02x:%02x:%x",
|
||||
slot->bus->number, PCI_SLOT(slot->devfn), PCI_FUNC(slot->devfn));
|
||||
slot->dev = pci_find_slot(slot->bus->number, slot->devfn);
|
||||
slot->dev = pci_get_slot(slot->bus, slot->devfn);
|
||||
}
|
||||
|
||||
/* Still NULL? Well then scan for it! */
|
||||
if(slot->dev == NULL) {
|
||||
if (slot->dev == NULL) {
|
||||
int n;
|
||||
dbg("pci_dev still null");
|
||||
|
||||
|
@ -311,10 +277,10 @@ int cpci_configure_slot(struct slot* slot)
|
|||
*/
|
||||
n = pci_scan_slot(slot->bus, slot->devfn);
|
||||
dbg("%s: pci_scan_slot returned %d", __FUNCTION__, n);
|
||||
if(n > 0)
|
||||
if (n > 0)
|
||||
pci_bus_add_devices(slot->bus);
|
||||
slot->dev = pci_find_slot(slot->bus->number, slot->devfn);
|
||||
if(slot->dev == NULL) {
|
||||
slot->dev = pci_get_slot(slot->bus, slot->devfn);
|
||||
if (slot->dev == NULL) {
|
||||
err("Could not find PCI device for slot %02x", slot->number);
|
||||
return 1;
|
||||
}
|
||||
|
@ -329,8 +295,6 @@ int cpci_configure_slot(struct slot* slot)
|
|||
|
||||
pci_bus_assign_resources(slot->dev->bus);
|
||||
|
||||
cpci_enable_device(slot->dev);
|
||||
|
||||
dbg("%s - exit", __FUNCTION__);
|
||||
return 0;
|
||||
}
|
||||
|
@ -341,15 +305,15 @@ int cpci_unconfigure_slot(struct slot* slot)
|
|||
struct pci_dev *dev;
|
||||
|
||||
dbg("%s - enter", __FUNCTION__);
|
||||
if(!slot->dev) {
|
||||
if (!slot->dev) {
|
||||
err("No device for slot %02x\n", slot->number);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
for (i = 0; i < 8; i++) {
|
||||
dev = pci_find_slot(slot->bus->number,
|
||||
dev = pci_get_slot(slot->bus,
|
||||
PCI_DEVFN(PCI_SLOT(slot->devfn), i));
|
||||
if(dev) {
|
||||
if (dev) {
|
||||
pci_remove_bus_device(dev);
|
||||
slot->dev = NULL;
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue