/**
* bridge_slot_remove - Removes a node from the linked list of slots.
* @bridge: bridge to remove
+ * @secondaryBus: secondary PCI bus number for bridge being removed
+ * @subordinateBus: subordinate PCI bus number for bridge being removed
*
* Returns 0 if successful, !0 otherwise.
*/
-static int bridge_slot_remove(struct pci_func *bridge)
+static int bridge_slot_remove(struct pci_func *bridge, u8 secondaryBus,
+ u8 subordinateBus)
{
- u8 subordinateBus, secondaryBus;
u8 tempBus;
struct pci_func *next;
if (bridge == NULL)
return(1);
- secondaryBus = (bridge->config_space[0x06] >> 8) & 0xFF;
- subordinateBus = (bridge->config_space[0x06] >> 16) & 0xFF;
-
for (tempBus = secondaryBus; tempBus <= subordinateBus; tempBus++) {
next = shpchp_slot_list[tempBus];
return(NULL);
}
-static int is_bridge(struct pci_func * func)
+static int is_bridge(struct pci_func *func, struct controller *ctrl)
{
- /* Check the header type */
- if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01)
+ u8 hdr_type;
+ struct pci_bus *bus = ctrl->pci_dev->subordinate;
+
+ /*
+ * Note: device may have just been hot-added and not yet scanned
+ * by the pci core, so its pci_dev structure may not exist yet
+ */
+ pci_bus_read_config_byte(bus, PCI_DEVFN(func->device, func->function),
+ PCI_HEADER_TYPE, &hdr_type);
+ if ((hdr_type & 0x7f) == PCI_HEADER_TYPE_BRIDGE)
return 1;
else
return 0;
}
-
/* The following routines constitute the bulk of the
hotplug controller logic
*/
goto err_exit;
}
- shpchp_save_slot_config(ctrl, func);
-
func->status = 0;
func->switch_save = 0x10;
func->is_a_board = 0x01;
u8 hp_slot;
u32 rc;
struct slot *p_slot;
+ u8 secondary = 0, subordinate = 0;
+ int remove_bridge;
if (func == NULL)
return(1);
+ if ((remove_bridge = is_bridge(func, ctrl))) {
+ /* Stash away bus information before we destroy it */
+ secondary = func->pci_dev->subordinate->secondary;
+ subordinate = func->pci_dev->subordinate->subordinate;
+ }
+
if (shpchp_unconfigure_device(func))
return(1);
if (ctrl->add_support) {
while (func) {
- if (is_bridge(func)) {
+ if (remove_bridge) {
dbg("PCI Bridge Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg, func->bus,
func->device, func->function);
- bridge_slot_remove(func);
+ bridge_slot_remove(func, secondary,
+ subordinate);
} else
dbg("PCI Function Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg, func->bus,
func->device, func->function);
rc = board_added(func, p_slot->ctrl);
if (rc) {
- if (is_bridge(func))
- bridge_slot_remove(func);
- else
+ if (is_bridge(func, p_slot->ctrl)) {
+ u8 secondary = func->pci_dev->subordinate->secondary;
+ u8 subordinate =
+ func->pci_dev->subordinate->subordinate;
+ bridge_slot_remove(func, secondary, subordinate);
+ } else
slot_remove(func);
/* Setup slot structure with entry for empty slot */
return rc;
}
-/* More PCI configuration routines; this time centered around hotplug controller */
-
-
-/*
- * shpchp_save_config
- *
- * Reads configuration for all slots in a PCI bus and saves info.
- *
- * Note: For non-hot plug busses, the slot # saved is the device #
- *
- * returns 0 if success
- */
-int shpchp_save_config(struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num)
-{
- int rc;
- u8 class_code;
- u8 header_type;
- u32 ID;
- u8 secondary_bus;
- struct pci_func *new_slot;
- int sub_bus;
- int FirstSupported;
- int LastSupported;
- int max_functions;
- int function;
- u8 DevError;
- int device = 0;
- int cloop = 0;
- int stop_it;
- int index;
- int is_hot_plug = num_ctlr_slots || first_device_num;
- struct pci_bus lpci_bus, *pci_bus;
-
- dbg("%s: num_ctlr_slots = %d, first_device_num = %d\n", __FUNCTION__,
- num_ctlr_slots, first_device_num);
-
- memcpy(&lpci_bus, ctrl->pci_dev->subordinate, sizeof(lpci_bus));
- pci_bus = &lpci_bus;
-
- dbg("%s: num_ctlr_slots = %d, first_device_num = %d\n", __FUNCTION__,
- num_ctlr_slots, first_device_num);
-
- /* Decide which slots are supported */
- if (is_hot_plug) {
- /*********************************
- * is_hot_plug is the slot mask
- *********************************/
- FirstSupported = first_device_num;
- LastSupported = FirstSupported + num_ctlr_slots - 1;
- } else {
- FirstSupported = 0;
- LastSupported = 0x1F;
- }
-
- dbg("FirstSupported = %d, LastSupported = %d\n", FirstSupported,
- LastSupported);
-
- /* Save PCI configuration space for all devices in supported slots */
- pci_bus->number = busnumber;
- for (device = FirstSupported; device <= LastSupported; device++) {
- ID = 0xFFFFFFFF;
- rc = pci_bus_read_config_dword(pci_bus, PCI_DEVFN(device, 0),
- PCI_VENDOR_ID, &ID);
-
- if (ID != 0xFFFFFFFF) { /* device in slot */
- rc = pci_bus_read_config_byte(pci_bus, PCI_DEVFN(device, 0),
- 0x0B, &class_code);
- if (rc)
- return rc;
-
- rc = pci_bus_read_config_byte(pci_bus, PCI_DEVFN(device, 0),
- PCI_HEADER_TYPE, &header_type);
- if (rc)
- return rc;
-
- dbg("class_code = %x, header_type = %x\n", class_code, header_type);
-
- /* If multi-function device, set max_functions to 8 */
- if (header_type & 0x80)
- max_functions = 8;
- else
- max_functions = 1;
-
- function = 0;
-
- do {
- DevError = 0;
-
- if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { /* P-P Bridge */
- /* Recurse the subordinate bus
- * get the subordinate bus number
- */
- rc = pci_bus_read_config_byte(pci_bus,
- PCI_DEVFN(device, function),
- PCI_SECONDARY_BUS, &secondary_bus);
- if (rc) {
- return rc;
- } else {
- sub_bus = (int) secondary_bus;
-
- /* Save secondary bus cfg spc with this recursive call. */
- rc = shpchp_save_config(ctrl, sub_bus, 0, 0);
- if (rc)
- return rc;
- }
- }
-
- index = 0;
- new_slot = shpchp_slot_find(busnumber, device, index++);
-
- dbg("new_slot = %p\n", new_slot);
-
- while (new_slot && (new_slot->function != (u8) function)) {
- new_slot = shpchp_slot_find(busnumber, device, index++);
- dbg("new_slot = %p\n", new_slot);
- }
- if (!new_slot) {
- /* Setup slot structure. */
- new_slot = shpchp_slot_create(busnumber);
- dbg("new_slot = %p\n", new_slot);
-
- if (new_slot == NULL)
- return(1);
- }
-
- new_slot->bus = (u8) busnumber;
- new_slot->device = (u8) device;
- new_slot->function = (u8) function;
- new_slot->is_a_board = 1;
- new_slot->switch_save = 0x10;
- new_slot->pwr_save = 1;
- /* In case of unsupported board */
- new_slot->status = DevError;
- new_slot->pci_dev = pci_find_slot(new_slot->bus,
- (new_slot->device << 3) | new_slot->function);
- dbg("new_slot->pci_dev = %p\n", new_slot->pci_dev);
-
- for (cloop = 0; cloop < 0x20; cloop++) {
- rc = pci_bus_read_config_dword(pci_bus,
- PCI_DEVFN(device, function),
- cloop << 2,
- (u32 *) &(new_slot->config_space [cloop]));
- /* dbg("new_slot->config_space[%x] = %x\n",
- cloop, new_slot->config_space[cloop]); */
- if (rc)
- return rc;
- }
-
- function++;
-
- stop_it = 0;
-
- /* this loop skips to the next present function
- * reading in Class Code and Header type.
- */
-
- while ((function < max_functions)&&(!stop_it)) {
- rc = pci_bus_read_config_dword(pci_bus,
- PCI_DEVFN(device, function),
- PCI_VENDOR_ID, &ID);
-
- if (ID == 0xFFFFFFFF) { /* nothing there. */
- function++;
- dbg("Nothing there\n");
- } else { /* Something there */
- rc = pci_bus_read_config_byte(pci_bus,
- PCI_DEVFN(device, function),
- 0x0B, &class_code);
- if (rc)
- return rc;
-
- rc = pci_bus_read_config_byte(pci_bus,
- PCI_DEVFN(device, function),
- PCI_HEADER_TYPE, &header_type);
- if (rc)
- return rc;
-
- dbg("class_code = %x, header_type = %x\n",
- class_code, header_type);
- stop_it++;
- }
- }
-
- } while (function < max_functions);
- /* End of IF (device in slot?) */
- } else if (is_hot_plug) {
- /* Setup slot structure with entry for empty slot */
- new_slot = shpchp_slot_create(busnumber);
-
- if (new_slot == NULL) {
- return(1);
- }
- dbg("new_slot = %p\n", new_slot);
-
- new_slot->bus = (u8) busnumber;
- new_slot->device = (u8) device;
- new_slot->function = 0;
- new_slot->is_a_board = 0;
- new_slot->presence_save = 0;
- new_slot->switch_save = 0;
- }
- } /* End of FOR loop */
-
- return(0);
-}
-
-
-/*
- * shpchp_save_slot_config
- *
- * Saves configuration info for all PCI devices in a given slot
- * including subordinate busses.
- *
- * returns 0 if success
- */
-int shpchp_save_slot_config(struct controller *ctrl, struct pci_func * new_slot)
-{
- int rc;
- u8 class_code;
- u8 header_type;
- u32 ID;
- u8 secondary_bus;
- int sub_bus;
- int max_functions;
- int function;
- int cloop = 0;
- int stop_it;
- struct pci_bus lpci_bus, *pci_bus;
- memcpy(&lpci_bus, ctrl->pci_dev->subordinate, sizeof(lpci_bus));
- pci_bus = &lpci_bus;
- pci_bus->number = new_slot->bus;
-
- ID = 0xFFFFFFFF;
-
- pci_bus_read_config_dword(pci_bus, PCI_DEVFN(new_slot->device, 0),
- PCI_VENDOR_ID, &ID);
-
- if (ID != 0xFFFFFFFF) { /* device in slot */
- pci_bus_read_config_byte(pci_bus, PCI_DEVFN(new_slot->device, 0),
- 0x0B, &class_code);
-
- pci_bus_read_config_byte(pci_bus, PCI_DEVFN(new_slot->device, 0),
- PCI_HEADER_TYPE, &header_type);
-
- if (header_type & 0x80) /* Multi-function device */
- max_functions = 8;
- else
- max_functions = 1;
-
- function = 0;
-
- do {
- if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) { /* PCI-PCI Bridge */
- /* Recurse the subordinate bus */
- pci_bus_read_config_byte(pci_bus,
- PCI_DEVFN(new_slot->device, function),
- PCI_SECONDARY_BUS, &secondary_bus);
-
- sub_bus = (int) secondary_bus;
-
- /* Save the config headers for the secondary bus. */
- rc = shpchp_save_config(ctrl, sub_bus, 0, 0);
-
- if (rc)
- return rc;
-
- } /* End of IF */
-
- new_slot->status = 0;
-
- for (cloop = 0; cloop < 0x20; cloop++) {
- pci_bus_read_config_dword(pci_bus,
- PCI_DEVFN(new_slot->device, function),
- cloop << 2,
- (u32 *) &(new_slot->config_space [cloop]));
- }
-
- function++;
-
- stop_it = 0;
-
- /* this loop skips to the next present function
- * reading in the Class Code and the Header type.
- */
-
- while ((function < max_functions) && (!stop_it)) {
- pci_bus_read_config_dword(pci_bus,
- PCI_DEVFN(new_slot->device, function),
- PCI_VENDOR_ID, &ID);
-
- if (ID == 0xFFFFFFFF) { /* nothing there. */
- function++;
- } else { /* Something there */
- pci_bus_read_config_byte(pci_bus,
- PCI_DEVFN(new_slot->device, function),
- 0x0B, &class_code);
-
- pci_bus_read_config_byte(pci_bus,
- PCI_DEVFN(new_slot->device, function),
- PCI_HEADER_TYPE, &header_type);
-
- stop_it++;
- }
- }
-
- } while (function < max_functions);
- } /* End of IF (device in slot?) */
- else {
- return 2;
- }
-
- return 0;
-}
-
projects / openwrt / staging / blogic.git / commitdiff