- up(&p_slot->ctrl->crit_sect);
-
- func = pciehp_slot_find(p_slot->bus, p_slot->device, index++);
-
- /* Make sure there are no video controllers here
- * for all func of p_slot
- */
- while (func && !rc) {
- pci_bus->number = func->bus;
- devfn = PCI_DEVFN(func->device, func->function);
-
- /* Check the Class Code */
- rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
- if (rc)
- return rc;
-
- if (class_code == PCI_BASE_CLASS_DISPLAY) {
- /* Display/Video adapter (not supported) */
- rc = REMOVE_NOT_SUPPORTED;
- } else {
- /* See if it's a bridge */
- rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
- if (rc)
- return rc;
-
- /* If it's a bridge, check the VGA Enable bit */
- if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
- rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR);
- if (rc)
- return rc;
-
- /* If the VGA Enable bit is set, remove isn't supported */
- if (BCR & PCI_BRIDGE_CTL_VGA) {
- rc = REMOVE_NOT_SUPPORTED;
- }
- }
- }
-
- func = pciehp_slot_find(p_slot->bus, p_slot->device, index++);
- }
-
- func = pciehp_slot_find(p_slot->bus, p_slot->device, 0);
- if ((func != NULL) && !rc) {
- rc = remove_board(func, p_slot->ctrl);
- } else if (!rc)
- rc = 1;
-
- if (p_slot)
- update_slot_info(p_slot);
-
- return rc;
-}
-
-
-/**
- * configure_new_device - Configures the PCI header information of one board.
- *
- * @ctrl: pointer to controller structure
- * @func: pointer to function structure
- * @behind_bridge: 1 if this is a recursive call, 0 if not
- * @resources: pointer to set of resource lists
- *
- * Returns 0 if success
- *
- */
-static u32 configure_new_device(struct controller * ctrl, struct pci_func * func,
- u8 behind_bridge, struct resource_lists * resources, u8 bridge_bus, u8 bridge_dev)
-{
- u8 temp_byte, function, max_functions, stop_it;
- int rc;
- u32 ID;
- struct pci_func *new_slot;
- struct pci_bus lpci_bus, *pci_bus;
- int index;
-
- new_slot = func;
-
- dbg("%s\n", __FUNCTION__);
- memcpy(&lpci_bus, ctrl->pci_dev->subordinate, sizeof(lpci_bus));
- pci_bus = &lpci_bus;
- pci_bus->number = func->bus;
-
- /* Check for Multi-function device */
- rc = pci_bus_read_config_byte(pci_bus, PCI_DEVFN(func->device, func->function), 0x0E, &temp_byte);
- if (rc) {
- dbg("%s: rc = %d\n", __FUNCTION__, rc);
- return rc;
- }
-
- if (temp_byte & 0x80) /* Multi-function device */
- max_functions = 8;
- else
- max_functions = 1;
-
- function = 0;
-
- do {
- rc = configure_new_function(ctrl, new_slot, behind_bridge,
- resources, bridge_bus, bridge_dev);
-
- if (rc) {
- dbg("configure_new_function failed: %d\n", rc);
- index = 0;
-
- while (new_slot) {
- new_slot = pciehp_slot_find(new_slot->bus,
- new_slot->device, index++);
-
- if (new_slot)
- pciehp_return_board_resources(new_slot,
- resources);
- }
-
- return rc;
- }
-
- function++;
-
- stop_it = 0;
-
- /* The following loop skips to the next present function
- * and creates a board structure
- */
-
- while ((function < max_functions) && (!stop_it)) {
- pci_bus_read_config_dword(pci_bus, PCI_DEVFN(func->device, function), 0x00, &ID);
-
- if (ID == 0xFFFFFFFF) { /* There's nothing there. */
- function++;
- } else { /* There's something there */
- /* Setup slot structure. */
- new_slot = pciehp_slot_create(func->bus);
-
- if (new_slot == NULL) {
- /* Out of memory */
- return 1;
- }
-
- new_slot->bus = func->bus;
- new_slot->device = func->device;
- new_slot->function = function;
- new_slot->is_a_board = 1;
- new_slot->status = 0;
-
- stop_it++;
- }
- }
-
- } while (function < max_functions);
- dbg("returning from %s\n", __FUNCTION__);
-
- return 0;
-}
-
-/*
- * Configuration logic that involves the hotplug data structures and
- * their bookkeeping
- */
-
-/**
- * configure_bridge: fill bridge's registers, either configure or disable it.
- */
-static int
-configure_bridge(struct pci_bus *pci_bus, unsigned int devfn,
- struct pci_resource *mem_node,
- struct pci_resource **hold_mem_node,
- int base_addr, int limit_addr)
-{
- u16 temp_word;
- u32 rc;
-
- if (mem_node) {
- memcpy(*hold_mem_node, mem_node, sizeof(struct pci_resource));
- mem_node->next = NULL;
-
- /* set Mem base and Limit registers */
- RES_CHECK(mem_node->base, 16);
- temp_word = (u16)(mem_node->base >> 16);
- rc = pci_bus_write_config_word(pci_bus, devfn, base_addr, temp_word);
-
- RES_CHECK(mem_node->base + mem_node->length - 1, 16);
- temp_word = (u16)((mem_node->base + mem_node->length - 1) >> 16);
- rc = pci_bus_write_config_word(pci_bus, devfn, limit_addr, temp_word);
- } else {
- temp_word = 0xFFFF;
- rc = pci_bus_write_config_word(pci_bus, devfn, base_addr, temp_word);
-
- temp_word = 0x0000;
- rc = pci_bus_write_config_word(pci_bus, devfn, limit_addr, temp_word);
-
- kfree(*hold_mem_node);
- *hold_mem_node = NULL;
- }
- return rc;
-}
-
-static int
-configure_new_bridge(struct controller *ctrl, struct pci_func *func,
- u8 behind_bridge, struct resource_lists *resources,
- struct pci_bus *pci_bus)
-{
- int cloop;
- u8 temp_byte;
- u8 device;
- u16 temp_word;
- u32 rc;
- u32 ID;
- unsigned int devfn;
- struct pci_resource *mem_node;
- struct pci_resource *p_mem_node;
- struct pci_resource *io_node;
- struct pci_resource *bus_node;
- struct pci_resource *hold_mem_node;
- struct pci_resource *hold_p_mem_node;
- struct pci_resource *hold_IO_node;
- struct pci_resource *hold_bus_node;
- struct irq_mapping irqs;
- struct pci_func *new_slot;
- struct resource_lists temp_resources;
-
- devfn = PCI_DEVFN(func->device, func->function);
-
- /* set Primary bus */
- dbg("set Primary bus = 0x%x\n", func->bus);
- rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_PRIMARY_BUS, func->bus);
- if (rc)
- return rc;
-
- /* find range of busses to use */
- bus_node = get_max_resource(&resources->bus_head, 1L);
-
- /* If we don't have any busses to allocate, we can't continue */
- if (!bus_node) {
- err("Got NO bus resource to use\n");
- return -ENOMEM;
- }
- dbg("Got ranges of buses to use: base:len=0x%x:%x\n", bus_node->base, bus_node->length);
-
- /* set Secondary bus */
- temp_byte = (u8)bus_node->base;
- dbg("set Secondary bus = 0x%x\n", temp_byte);
- rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, temp_byte);
- if (rc)
- return rc;
-
- /* set subordinate bus */
- temp_byte = (u8)(bus_node->base + bus_node->length - 1);
- dbg("set subordinate bus = 0x%x\n", temp_byte);
- rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
- if (rc)
- return rc;
-
- /* Set HP parameters (Cache Line Size, Latency Timer) */
- rc = pciehprm_set_hpp(ctrl, func, PCI_HEADER_TYPE_BRIDGE);
- if (rc)
- return rc;
-
- /* Setup the IO, memory, and prefetchable windows */
-
- io_node = get_max_resource(&(resources->io_head), 0x1000L);
- if (io_node) {
- dbg("io_node(base, len, next) (%x, %x, %p)\n", io_node->base,
- io_node->length, io_node->next);
- }
-
- mem_node = get_max_resource(&(resources->mem_head), 0x100000L);
- if (mem_node) {
- dbg("mem_node(base, len, next) (%x, %x, %p)\n", mem_node->base,
- mem_node->length, mem_node->next);
- }
-
- if (resources->p_mem_head)
- p_mem_node = get_max_resource(&(resources->p_mem_head), 0x100000L);
- else {
- /*
- * In some platform implementation, MEM and PMEM are not
- * distinguished, and hence ACPI _CRS has only MEM entries
- * for both MEM and PMEM.
- */
- dbg("using MEM for PMEM\n");
- p_mem_node = get_max_resource(&(resources->mem_head), 0x100000L);
- }
- if (p_mem_node) {
- dbg("p_mem_node(base, len, next) (%x, %x, %p)\n", p_mem_node->base,
- p_mem_node->length, p_mem_node->next);
- }
-
- /* set up the IRQ info */
- if (!resources->irqs) {
- irqs.barber_pole = 0;
- irqs.interrupt[0] = 0;
- irqs.interrupt[1] = 0;
- irqs.interrupt[2] = 0;
- irqs.interrupt[3] = 0;
- irqs.valid_INT = 0;
- } else {
- irqs.barber_pole = resources->irqs->barber_pole;
- irqs.interrupt[0] = resources->irqs->interrupt[0];
- irqs.interrupt[1] = resources->irqs->interrupt[1];
- irqs.interrupt[2] = resources->irqs->interrupt[2];
- irqs.interrupt[3] = resources->irqs->interrupt[3];
- irqs.valid_INT = resources->irqs->valid_INT;
- }
-
- /* set up resource lists that are now aligned on top and bottom
- * for anything behind the bridge.
- */
- temp_resources.bus_head = bus_node;
- temp_resources.io_head = io_node;
- temp_resources.mem_head = mem_node;
- temp_resources.p_mem_head = p_mem_node;
- temp_resources.irqs = &irqs;
-
- /* Make copies of the nodes we are going to pass down so that
- * if there is a problem,we can just use these to free resources
- */
- hold_bus_node = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
- hold_IO_node = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
- hold_mem_node = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
- hold_p_mem_node = kmalloc(sizeof(struct pci_resource), GFP_KERNEL);
-
- if (!hold_bus_node || !hold_IO_node || !hold_mem_node || !hold_p_mem_node) {
- kfree(hold_bus_node);
- kfree(hold_IO_node);
- kfree(hold_mem_node);
- kfree(hold_p_mem_node);
-
- return 1;
- }
-
- memcpy(hold_bus_node, bus_node, sizeof(struct pci_resource));
-
- bus_node->base += 1;
- bus_node->length -= 1;
- bus_node->next = NULL;
-
- /* If we have IO resources copy them and fill in the bridge's
- * IO range registers
- */
- if (io_node) {
- memcpy(hold_IO_node, io_node, sizeof(struct pci_resource));
- io_node->next = NULL;
-
- /* set IO base and Limit registers */
- RES_CHECK(io_node->base, 8);
- temp_byte = (u8)(io_node->base >> 8);
- rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_BASE, temp_byte);
-
- RES_CHECK(io_node->base + io_node->length - 1, 8);
- temp_byte = (u8)((io_node->base + io_node->length - 1) >> 8);
- rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
- } else {
- kfree(hold_IO_node);
- hold_IO_node = NULL;
- }
-
- /* If we have memory resources copy them and fill in the bridge's
- * memory range registers. Otherwise, fill in the range
- * registers with values that disable them.
- */
- rc = configure_bridge(pci_bus, devfn, mem_node, &hold_mem_node,
- PCI_MEMORY_BASE, PCI_MEMORY_LIMIT);
-
- /* If we have prefetchable memory resources copy them and
- * fill in the bridge's memory range registers. Otherwise,
- * fill in the range registers with values that disable them.
- */
- rc = configure_bridge(pci_bus, devfn, p_mem_node, &hold_p_mem_node,
- PCI_PREF_MEMORY_BASE, PCI_PREF_MEMORY_LIMIT);
-
- /* Adjust this to compensate for extra adjustment in first loop */
- irqs.barber_pole--;
-
- rc = 0;
-
- /* Here we actually find the devices and configure them */
- for (device = 0; (device <= 0x1F) && !rc; device++) {
- irqs.barber_pole = (irqs.barber_pole + 1) & 0x03;
-
- ID = 0xFFFFFFFF;
- pci_bus->number = hold_bus_node->base;
- pci_bus_read_config_dword (pci_bus, PCI_DEVFN(device, 0), PCI_VENDOR_ID, &ID);
- pci_bus->number = func->bus;
-
- if (ID != 0xFFFFFFFF) { /* device Present */
- /* Setup slot structure. */
- new_slot = pciehp_slot_create(hold_bus_node->base);
-
- if (new_slot == NULL) {
- /* Out of memory */
- rc = -ENOMEM;
- continue;
- }
-
- new_slot->bus = hold_bus_node->base;
- new_slot->device = device;
- new_slot->function = 0;
- new_slot->is_a_board = 1;
- new_slot->status = 0;
-
- rc = configure_new_device(ctrl, new_slot, 1,
- &temp_resources, func->bus,
- func->device);
- dbg("configure_new_device rc=0x%x\n",rc);
- } /* End of IF (device in slot?) */
- } /* End of FOR loop */
-
- if (rc) {
- pciehp_destroy_resource_list(&temp_resources);
-
- return_resource(&(resources->bus_head), hold_bus_node);
- return_resource(&(resources->io_head), hold_IO_node);
- return_resource(&(resources->mem_head), hold_mem_node);
- return_resource(&(resources->p_mem_head), hold_p_mem_node);
- return(rc);
- }
-
- /* save the interrupt routing information */
- if (resources->irqs) {
- resources->irqs->interrupt[0] = irqs.interrupt[0];
- resources->irqs->interrupt[1] = irqs.interrupt[1];
- resources->irqs->interrupt[2] = irqs.interrupt[2];
- resources->irqs->interrupt[3] = irqs.interrupt[3];
- resources->irqs->valid_INT = irqs.valid_INT;
- } else if (!behind_bridge) {
- /* We need to hook up the interrupts here */
- for (cloop = 0; cloop < 4; cloop++) {
- if (irqs.valid_INT & (0x01 << cloop)) {
- rc = pciehp_set_irq(func->bus, func->device,
- 0x0A + cloop, irqs.interrupt[cloop]);
- if (rc) {
- pciehp_destroy_resource_list (&temp_resources);
- return_resource(&(resources->bus_head), hold_bus_node);
- return_resource(&(resources->io_head), hold_IO_node);
- return_resource(&(resources->mem_head), hold_mem_node);
- return_resource(&(resources->p_mem_head), hold_p_mem_node);
- return rc;
- }
- }
- } /* end of for loop */
- }
-
- /* Return unused bus resources
- * First use the temporary node to store information for the board
- */
- if (hold_bus_node && bus_node && temp_resources.bus_head) {
- hold_bus_node->length = bus_node->base - hold_bus_node->base;
-
- hold_bus_node->next = func->bus_head;
- func->bus_head = hold_bus_node;
-
- temp_byte = (u8)(temp_resources.bus_head->base - 1);
-
- /* set subordinate bus */
- dbg("re-set subordinate bus = 0x%x\n", temp_byte);
- rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
-
- if (temp_resources.bus_head->length == 0) {
- kfree(temp_resources.bus_head);
- temp_resources.bus_head = NULL;
- } else {
- dbg("return bus res of b:d(0x%x:%x) base:len(0x%x:%x)\n",
- func->bus, func->device, temp_resources.bus_head->base, temp_resources.bus_head->length);
- return_resource(&(resources->bus_head), temp_resources.bus_head);
- }
- }
-
- /* If we have IO space available and there is some left,
- * return the unused portion
- */
- if (hold_IO_node && temp_resources.io_head) {
- io_node = do_pre_bridge_resource_split(&(temp_resources.io_head),
- &hold_IO_node, 0x1000);
-
- /* Check if we were able to split something off */
- if (io_node) {
- hold_IO_node->base = io_node->base + io_node->length;
-
- RES_CHECK(hold_IO_node->base, 8);
- temp_byte = (u8)((hold_IO_node->base) >> 8);
- rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_BASE, temp_byte);
-
- return_resource(&(resources->io_head), io_node);
- }
-
- io_node = do_bridge_resource_split(&(temp_resources.io_head), 0x1000);
-
- /* Check if we were able to split something off */
- if (io_node) {
- /* First use the temporary node to store information for the board */
- hold_IO_node->length = io_node->base - hold_IO_node->base;
-
- /* If we used any, add it to the board's list */
- if (hold_IO_node->length) {
- hold_IO_node->next = func->io_head;
- func->io_head = hold_IO_node;
-
- RES_CHECK(io_node->base - 1, 8);
- temp_byte = (u8)((io_node->base - 1) >> 8);
- rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
-
- return_resource(&(resources->io_head), io_node);
- } else {
- /* it doesn't need any IO */
- temp_byte = 0x00;
- rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
-
- return_resource(&(resources->io_head), io_node);
- kfree(hold_IO_node);
- }
- } else {
- /* it used most of the range */
- hold_IO_node->next = func->io_head;
- func->io_head = hold_IO_node;
- }
- } else if (hold_IO_node) {
- /* it used the whole range */
- hold_IO_node->next = func->io_head;
- func->io_head = hold_IO_node;
- }
-
- /* If we have memory space available and there is some left,
- * return the unused portion
- */
- if (hold_mem_node && temp_resources.mem_head) {
- mem_node = do_pre_bridge_resource_split(&(temp_resources.mem_head), &hold_mem_node, 0x100000L);
-
- /* Check if we were able to split something off */
- if (mem_node) {
- hold_mem_node->base = mem_node->base + mem_node->length;
-
- RES_CHECK(hold_mem_node->base, 16);
- temp_word = (u16)((hold_mem_node->base) >> 16);
- rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
-
- return_resource(&(resources->mem_head), mem_node);
- }
-
- mem_node = do_bridge_resource_split(&(temp_resources.mem_head), 0x100000L);
-
- /* Check if we were able to split something off */
- if (mem_node) {
- /* First use the temporary node to store information for the board */
- hold_mem_node->length = mem_node->base - hold_mem_node->base;
-
- if (hold_mem_node->length) {
- hold_mem_node->next = func->mem_head;
- func->mem_head = hold_mem_node;
-
- /* configure end address */
- RES_CHECK(mem_node->base - 1, 16);
- temp_word = (u16)((mem_node->base - 1) >> 16);
- rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
-
- /* Return unused resources to the pool */
- return_resource(&(resources->mem_head), mem_node);
- } else {
- /* it doesn't need any Mem */
- temp_word = 0x0000;
- rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
-
- return_resource(&(resources->mem_head), mem_node);
- kfree(hold_mem_node);
- }
- } else {
- /* it used most of the range */
- hold_mem_node->next = func->mem_head;
- func->mem_head = hold_mem_node;
- }
- } else if (hold_mem_node) {
- /* it used the whole range */
- hold_mem_node->next = func->mem_head;
- func->mem_head = hold_mem_node;
- }
-
- /* If we have prefetchable memory space available and there is some
- * left at the end, return the unused portion
- */
- if (hold_p_mem_node && temp_resources.p_mem_head) {
- p_mem_node = do_pre_bridge_resource_split(&(temp_resources.p_mem_head),
- &hold_p_mem_node, 0x100000L);
-
- /* Check if we were able to split something off */
- if (p_mem_node) {
- hold_p_mem_node->base = p_mem_node->base + p_mem_node->length;
-
- RES_CHECK(hold_p_mem_node->base, 16);
- temp_word = (u16)((hold_p_mem_node->base) >> 16);
- rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
-
- return_resource(&(resources->p_mem_head), p_mem_node);
- }
-
- p_mem_node = do_bridge_resource_split(&(temp_resources.p_mem_head), 0x100000L);
-
- /* Check if we were able to split something off */
- if (p_mem_node) {
- /* First use the temporary node to store information for the board */
- hold_p_mem_node->length = p_mem_node->base - hold_p_mem_node->base;
-
- /* If we used any, add it to the board's list */
- if (hold_p_mem_node->length) {
- hold_p_mem_node->next = func->p_mem_head;
- func->p_mem_head = hold_p_mem_node;
-
- RES_CHECK(p_mem_node->base - 1, 16);
- temp_word = (u16)((p_mem_node->base - 1) >> 16);
- rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
-
- return_resource(&(resources->p_mem_head), p_mem_node);
- } else {
- /* it doesn't need any PMem */
- temp_word = 0x0000;
- rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
-
- return_resource(&(resources->p_mem_head), p_mem_node);
- kfree(hold_p_mem_node);
- }
- } else {
- /* it used the most of the range */
- hold_p_mem_node->next = func->p_mem_head;
- func->p_mem_head = hold_p_mem_node;
- }
- } else if (hold_p_mem_node) {
- /* it used the whole range */
- hold_p_mem_node->next = func->p_mem_head;
- func->p_mem_head = hold_p_mem_node;
- }
-
- /* We should be configuring an IRQ and the bridge's base address
- * registers if it needs them. Although we have never seen such
- * a device
- */
-
- pciehprm_enable_card(ctrl, func, PCI_HEADER_TYPE_BRIDGE);
-
- dbg("PCI Bridge Hot-Added s:b:d:f(%02x:%02x:%02x:%02x)\n", ctrl->seg, func->bus, func->device, func->function);