/* delay is in jiffies to wait for */ staticvoid long_delay(int delay)
{ /* * XXX(hch): if someone is bored please convert all callers * to call msleep_interruptible directly. They really want * to specify timeouts in natural units and spend a lot of * effort converting them to jiffies..
*/
msleep_interruptible(jiffies_to_msecs(delay));
}
/* FIXME: The following line needs to be somewhere else... */ #define WRONG_BUS_FREQUENCY 0x07 static u8 handle_switch_change(u8 change, struct controller *ctrl)
{ int hp_slot;
u8 rc = 0;
u16 temp_word; struct pci_func *func; struct event_info *taskInfo;
for (hp_slot = 0; hp_slot < 6; hp_slot++) { if (change & (0x1L << hp_slot)) { /* * this one changed.
*/
func = cpqhp_slot_find(ctrl->bus,
(hp_slot + ctrl->slot_device_offset), 0);
/* this is the structure that tells the worker thread * what to do
*/
taskInfo = &(ctrl->event_queue[ctrl->next_event]);
ctrl->next_event = (ctrl->next_event + 1) % 10;
taskInfo->hp_slot = hp_slot;
/** * cpqhp_find_slot - find the struct slot of given device * @ctrl: scan lots of this controller * @device: the device id to find
*/ staticstruct slot *cpqhp_find_slot(struct controller *ctrl, u8 device)
{ struct slot *slot = ctrl->slot;
while (slot && (slot->device != device))
slot = slot->next;
/* If the switch closed, must be a button * If not in button mode, nevermind
*/ if (func->switch_save && (ctrl->push_button == 1)) {
temp_word = ctrl->ctrl_int_comp >> 16;
temp_byte = (temp_word >> hp_slot) & 0x01;
temp_byte |= (temp_word >> (hp_slot + 7)) & 0x02;
if (temp_byte != func->presence_save) { /* * button Pressed (doesn't do anything)
*/
dbg("hp_slot %d button pressed\n", hp_slot);
taskInfo->event_type = INT_BUTTON_PRESS;
} else { /* * button Released - TAKE ACTION!!!!
*/
dbg("hp_slot %d button released\n", hp_slot);
taskInfo->event_type = INT_BUTTON_RELEASE;
/* Cancel if we are still blinking */ if ((p_slot->state == BLINKINGON_STATE)
|| (p_slot->state == BLINKINGOFF_STATE)) {
taskInfo->event_type = INT_BUTTON_CANCEL;
dbg("hp_slot %d button cancel\n", hp_slot);
} elseif ((p_slot->state == POWERON_STATE)
|| (p_slot->state == POWEROFF_STATE)) { /* info(msg_button_ignore, p_slot->number); */
taskInfo->event_type = INT_BUTTON_IGNORE;
dbg("hp_slot %d button ignore\n", hp_slot);
}
}
} else { /* Switch is open, assume a presence change * Save the presence state
*/
temp_word = ctrl->ctrl_int_comp >> 16;
func->presence_save = (temp_word >> hp_slot) & 0x01;
func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
if (ctrl->rev < 4) {
amber_LED_on(ctrl, hp_slot);
green_LED_off(ctrl, hp_slot);
set_SOGO(ctrl);
/* this is a fatal condition, we want * to crash the machine to protect from * data corruption. simulated_NMI
* shouldn't ever return */ /* FIXME
simulated_NMI(hp_slot, ctrl); */
/* The following code causes a software * crash just in case simulated_NMI did
* return */ /*FIXME
panic(msg_power_fault); */
} else { /* set power fault status for this board */
func->status = 0xFF;
info("power fault bit %x set\n", hp_slot);
}
}
}
}
return rc;
}
/** * sort_by_size - sort nodes on the list by their length, smallest first. * @head: list to sort
*/ staticint sort_by_size(struct pci_resource **head)
{ struct pci_resource *current_res; struct pci_resource *next_res; int out_of_order = 1;
if (!(*head)) return 1;
if (!((*head)->next)) return 0;
while (out_of_order) {
out_of_order = 0;
/* Special case for swapping list head */ if (((*head)->next) &&
((*head)->length > (*head)->next->length)) {
out_of_order++;
current_res = *head;
*head = (*head)->next;
current_res->next = (*head)->next;
(*head)->next = current_res;
}
current_res = *head;
while (current_res->next && current_res->next->next) { if (current_res->next->length > current_res->next->next->length) {
out_of_order++;
next_res = current_res->next;
current_res->next = current_res->next->next;
current_res = current_res->next;
next_res->next = current_res->next;
current_res->next = next_res;
} else
current_res = current_res->next;
}
} /* End of out_of_order loop */
return 0;
}
/** * sort_by_max_size - sort nodes on the list by their length, largest first. * @head: list to sort
*/ staticint sort_by_max_size(struct pci_resource **head)
{ struct pci_resource *current_res; struct pci_resource *next_res; int out_of_order = 1;
if (!(*head)) return 1;
if (!((*head)->next)) return 0;
while (out_of_order) {
out_of_order = 0;
/* Special case for swapping list head */ if (((*head)->next) &&
((*head)->length < (*head)->next->length)) {
out_of_order++;
current_res = *head;
*head = (*head)->next;
current_res->next = (*head)->next;
(*head)->next = current_res;
}
current_res = *head;
while (current_res->next && current_res->next->next) { if (current_res->next->length < current_res->next->next->length) {
out_of_order++;
next_res = current_res->next;
current_res->next = current_res->next->next;
current_res = current_res->next;
next_res->next = current_res->next;
current_res->next = next_res;
} else
current_res = current_res->next;
}
} /* End of out_of_order loop */
return 0;
}
/** * do_pre_bridge_resource_split - find node of resources that are unused * @head: new list head * @orig_head: original list head * @alignment: max node size (?)
*/ staticstruct pci_resource *do_pre_bridge_resource_split(struct pci_resource **head, struct pci_resource **orig_head, u32 alignment)
{ struct pci_resource *prevnode = NULL; struct pci_resource *node; struct pci_resource *split_node;
u32 rc;
u32 temp_dword;
dbg("do_pre_bridge_resource_split\n");
if (!(*head) || !(*orig_head)) return NULL;
rc = cpqhp_resource_sort_and_combine(head);
if (rc) return NULL;
if ((*head)->base != (*orig_head)->base) return NULL;
if ((*head)->length == (*orig_head)->length) return NULL;
/* If we got here, there the bridge requires some of the resource, but * we may be able to split some off of the front
*/
node = *head;
if (node->length & (alignment - 1)) { /* this one isn't an aligned length, so we'll make a new entry * and split it up.
*/
split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
if (node->base & (alignment - 1)) { /* Short circuit if adjusted size is too small */
temp_dword = (node->base | (alignment-1)) + 1; if ((node->length - (temp_dword - node->base)) < alignment) goto error;
if (node->length & (alignment - 1)) /* There's stuff in use after this node */ goto error;
return node;
error:
kfree(node); return NULL;
}
/** * get_io_resource - find first node of given size not in ISA aliasing window. * @head: list to search * @size: size of node to find, must be a power of two. * * Description: This function sorts the resource list by size and then * returns the first node of "size" length that is not in the ISA aliasing * window. If it finds a node larger than "size" it will split it up.
*/ staticstruct pci_resource *get_io_resource(struct pci_resource **head, u32 size)
{ struct pci_resource *prevnode; struct pci_resource *node; struct pci_resource *split_node;
u32 temp_dword;
if (!(*head)) return NULL;
if (cpqhp_resource_sort_and_combine(head)) return NULL;
if (sort_by_size(head)) return NULL;
for (node = *head; node; node = node->next) { if (node->length < size) continue;
if (node->base & (size - 1)) { /* this one isn't base aligned properly * so we'll make a new entry and split it up
*/
temp_dword = (node->base | (size-1)) + 1;
/* Short circuit if adjusted size is too small */ if ((node->length - (temp_dword - node->base)) < size) continue;
/* Put it in the list */
split_node->next = node->next;
node->next = split_node;
} /* End of non-aligned base */
/* Don't need to check if too small since we already did */ if (node->length > size) { /* this one is longer than we need * so we'll make a new entry and split it up
*/
split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
/* Put it in the list */
split_node->next = node->next;
node->next = split_node;
} /* End of too big on top end */
/* For IO make sure it's not in the ISA aliasing space */ if (node->base & 0x300L) continue;
/* If we got here, then it is the right size * Now take it out of the list and break
*/ if (*head == node) {
*head = node->next;
} else {
prevnode = *head; while (prevnode->next != node)
prevnode = prevnode->next;
/** * get_max_resource - get largest node which has at least the given size. * @head: the list to search the node in * @size: the minimum size of the node to find * * Description: Gets the largest node that is at least "size" big from the * list pointed to by head. It aligns the node on top and bottom * to "size" alignment before returning it.
*/ staticstruct pci_resource *get_max_resource(struct pci_resource **head, u32 size)
{ struct pci_resource *max; struct pci_resource *temp; struct pci_resource *split_node;
u32 temp_dword;
if (cpqhp_resource_sort_and_combine(head)) return NULL;
if (sort_by_max_size(head)) return NULL;
for (max = *head; max; max = max->next) { /* If not big enough we could probably just bail, * instead we'll continue to the next.
*/ if (max->length < size) continue;
if (max->base & (size - 1)) { /* this one isn't base aligned properly * so we'll make a new entry and split it up
*/
temp_dword = (max->base | (size-1)) + 1;
/* Short circuit if adjusted size is too small */ if ((max->length - (temp_dword - max->base)) < size) continue;
if ((max->base + max->length) & (size - 1)) { /* this one isn't end aligned properly at the top * so we'll make a new entry and split it up
*/
split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
/* Make sure it didn't shrink too much when we aligned it */ if (max->length < size) continue;
/* Now take it out of the list */
temp = *head; if (temp == max) {
*head = max->next;
} else { while (temp && temp->next != max)
temp = temp->next;
if (temp)
temp->next = max->next;
}
max->next = NULL; break;
}
return max;
}
/** * get_resource - find resource of given size and split up larger ones. * @head: the list to search for resources * @size: the size limit to use * * Description: This function sorts the resource list by size and then * returns the first node of "size" length. If it finds a node * larger than "size" it will split it up. * * size must be a power of two.
*/ staticstruct pci_resource *get_resource(struct pci_resource **head, u32 size)
{ struct pci_resource *prevnode; struct pci_resource *node; struct pci_resource *split_node;
u32 temp_dword;
if (cpqhp_resource_sort_and_combine(head)) return NULL;
if (node->base & (size - 1)) {
dbg("%s: not aligned\n", __func__); /* this one isn't base aligned properly * so we'll make a new entry and split it up
*/
temp_dword = (node->base | (size-1)) + 1;
/* Short circuit if adjusted size is too small */ if ((node->length - (temp_dword - node->base)) < size) continue;
split_node->next = node->next;
node->next = split_node;
} /* End of non-aligned base */
/* Don't need to check if too small since we already did */ if (node->length > size) {
dbg("%s: too big\n", __func__); /* this one is longer than we need * so we'll make a new entry and split it up
*/
split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
/* Put it in the list */
split_node->next = node->next;
node->next = split_node;
} /* End of too big on top end */
dbg("%s: got one!!!\n", __func__); /* If we got here, then it is the right size
* Now take it out of the list */ if (*head == node) {
*head = node->next;
} else {
prevnode = *head; while (prevnode->next != node)
prevnode = prevnode->next;
/** * cpqhp_resource_sort_and_combine - sort nodes by base addresses and clean up * @head: the list to sort and clean up * * Description: Sorts all of the nodes in the list in ascending order by * their base addresses. Also does garbage collection by * combining adjacent nodes. * * Returns %0 if success.
*/ int cpqhp_resource_sort_and_combine(struct pci_resource **head)
{ struct pci_resource *node1; struct pci_resource *node2; int out_of_order = 1;
dbg("%s: head = %p, *head = %p\n", __func__, head, *head);
if (!(*head)) return 1;
dbg("*head->next = %p\n", (*head)->next);
if (!(*head)->next) return 0; /* only one item on the list, already sorted! */
/* Special case for swapping list head */ if (((*head)->next) &&
((*head)->base > (*head)->next->base)) {
node1 = *head;
(*head) = (*head)->next;
node1->next = (*head)->next;
(*head)->next = node1;
out_of_order++;
}
node1 = (*head);
while (node1->next && node1->next->next) { if (node1->next->base > node1->next->next->base) {
out_of_order++;
node2 = node1->next;
node1->next = node1->next->next;
node1 = node1->next;
node2->next = node1->next;
node1->next = node2;
} else
node1 = node1->next;
}
} /* End of out_of_order loop */
reset = readb(ctrl->hpc_reg + RESET_FREQ_MODE); if (reset & 0x40) { /* Bus reset has completed */
reset &= 0xCF;
writeb(reset, ctrl->hpc_reg + RESET_FREQ_MODE);
reset = readb(ctrl->hpc_reg + RESET_FREQ_MODE);
wake_up_interruptible(&ctrl->queue);
}
if (schedule_flag) {
wake_up_process(cpqhp_event_thread);
dbg("Waking even thread");
} return IRQ_HANDLED;
}
/** * cpqhp_slot_create - Creates a node and adds it to the proper bus. * @busnumber: bus where new node is to be located * * Returns pointer to the new node or %NULL if unsuccessful.
*/ struct pci_func *cpqhp_slot_create(u8 busnumber)
{ struct pci_func *new_slot; struct pci_func *next;
new_slot = kzalloc(sizeof(*new_slot), GFP_KERNEL); if (new_slot == NULL) return new_slot;
new_slot->next = NULL;
new_slot->configured = 1;
if (cpqhp_slot_list[busnumber] == NULL) {
cpqhp_slot_list[busnumber] = new_slot;
} else {
next = cpqhp_slot_list[busnumber]; while (next->next != NULL)
next = next->next;
next->next = new_slot;
} return new_slot;
}
/** * slot_remove - Removes a node from the linked list of slots. * @old_slot: slot to remove * * Returns %0 if successful, !0 otherwise.
*/ staticint slot_remove(struct pci_func *old_slot)
{ struct pci_func *next;
if (old_slot == NULL) return 1;
next = cpqhp_slot_list[old_slot->bus]; if (next == NULL) return 1;
/** * cpqhp_slot_find - Looks for a node by bus, and device, multiple functions accessed * @bus: bus to find * @device: device to find * @index: is %0 for first function found, %1 for the second... * * Returns pointer to the node if successful, %NULL otherwise.
*/ struct pci_func *cpqhp_slot_find(u8 bus, u8 device, u8 index)
{ int found = -1; struct pci_func *func;
/* DJZ: I don't think is_bridge will work as is.
* FIXME */ staticint is_bridge(struct pci_func *func)
{ /* Check the header type */ if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01) return 1; else return 0;
}
/** * set_controller_speed - set the frequency and/or mode of a specific controller segment. * @ctrl: controller to change frequency/mode for. * @adapter_speed: the speed of the adapter we want to match. * @hp_slot: the slot number where the adapter is installed. * * Returns %0 if we successfully change frequency and/or mode to match the * adapter speed.
*/ static u8 set_controller_speed(struct controller *ctrl, u8 adapter_speed, u8 hp_slot)
{ struct slot *slot; struct pci_bus *bus = ctrl->pci_bus;
u8 reg;
u8 slot_power = readb(ctrl->hpc_reg + SLOT_POWER);
u16 reg16;
u32 leds = readl(ctrl->hpc_reg + LED_CONTROL);
if (bus->cur_bus_speed == adapter_speed) return 0;
/* We don't allow freq/mode changes if we find another adapter running * in another slot on this controller
*/ for (slot = ctrl->slot; slot; slot = slot->next) { if (slot->device == (hp_slot + ctrl->slot_device_offset)) continue; if (get_presence_status(ctrl, slot) == 0) continue; /* If another adapter is running on the same segment but at a * lower speed/mode, we allow the new adapter to function at * this rate if supported
*/ if (bus->cur_bus_speed < adapter_speed) return 0;
return 1;
}
/* If the controller doesn't support freq/mode changes and the * controller is running at a higher mode, we bail
*/ if ((bus->cur_bus_speed > adapter_speed) && (!ctrl->pcix_speed_capability)) return 1;
/* But we allow the adapter to run at a lower rate if possible */ if ((bus->cur_bus_speed < adapter_speed) && (!ctrl->pcix_speed_capability)) return 0;
/* We try to set the max speed supported by both the adapter and * controller
*/ if (bus->max_bus_speed < adapter_speed) { if (bus->cur_bus_speed == bus->max_bus_speed) return 0;
adapter_speed = bus->max_bus_speed;
}
info("Successfully changed frequency/mode for adapter in slot %d\n",
slot->number); return 0;
}
/* the following routines constitute the bulk of the * hotplug controller logic
*/
/** * board_replaced - Called after a board has been replaced in the system. * @func: PCI device/function information * @ctrl: hotplug controller * * This is only used if we don't have resources for hot add. * Turns power on for the board. * Checks to see if board is the same. * If board is same, reconfigures it. * If board isn't same, turns it back off.
*/ static u32 board_replaced(struct pci_func *func, struct controller *ctrl)
{ struct pci_bus *bus = ctrl->pci_bus;
u8 hp_slot;
u8 temp_byte;
u8 adapter_speed;
u32 rc = 0;
/* * The switch is open.
*/ if (readl(ctrl->hpc_reg + INT_INPUT_CLEAR) & (0x01L << hp_slot))
rc = INTERLOCK_OPEN; /* * The board is already on
*/ elseif (is_slot_enabled(ctrl, hp_slot))
rc = CARD_FUNCTIONING; else {
mutex_lock(&ctrl->crit_sect);
/* turn on board without attaching to the bus */
enable_slot_power(ctrl, hp_slot);
set_SOGO(ctrl);
/* Wait for SOBS to be unset */
wait_for_ctrl_irq(ctrl);
/* Change bits in slot power register to force another shift out
* NOTE: this is to work around the timer bug */
temp_byte = readb(ctrl->hpc_reg + SLOT_POWER);
writeb(0x00, ctrl->hpc_reg + SLOT_POWER);
writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER);
set_SOGO(ctrl);
/* Wait for SOBS to be unset */
wait_for_ctrl_irq(ctrl);
adapter_speed = get_adapter_speed(ctrl, hp_slot); if (bus->cur_bus_speed != adapter_speed) if (set_controller_speed(ctrl, adapter_speed, hp_slot))
rc = WRONG_BUS_FREQUENCY;
/* turn off board without attaching to the bus */
disable_slot_power(ctrl, hp_slot);
set_SOGO(ctrl);
/* Wait for SOBS to be unset */
wait_for_ctrl_irq(ctrl);
/* Wait for SOBS to be unset */
wait_for_ctrl_irq(ctrl);
mutex_unlock(&ctrl->crit_sect);
/* Wait for ~1 second because of hot plug spec */
long_delay(1*HZ);
/* Check for a power fault */ if (func->status == 0xFF) { /* power fault occurred, but it was benign */
rc = POWER_FAILURE;
func->status = 0;
} else
rc = cpqhp_valid_replace(ctrl, func);
if (!rc) { /* It must be the same board */
rc = cpqhp_configure_board(ctrl, func);
/* If configuration fails, turn it off * Get slot won't work for devices behind * bridges, but in this case it will always be * called for the "base" bus/dev/func of an * adapter.
*/
/* turn on board without attaching to the bus */
enable_slot_power(ctrl, hp_slot);
set_SOGO(ctrl);
/* Wait for SOBS to be unset */
wait_for_ctrl_irq(ctrl);
/* Change bits in slot power register to force another shift out * NOTE: this is to work around the timer bug
*/
temp_byte = readb(ctrl->hpc_reg + SLOT_POWER);
writeb(0x00, ctrl->hpc_reg + SLOT_POWER);
writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER);
set_SOGO(ctrl);
/* Wait for SOBS to be unset */
wait_for_ctrl_irq(ctrl);
adapter_speed = get_adapter_speed(ctrl, hp_slot); if (bus->cur_bus_speed != adapter_speed) if (set_controller_speed(ctrl, adapter_speed, hp_slot))
rc = WRONG_BUS_FREQUENCY;
/* turn off board without attaching to the bus */
disable_slot_power(ctrl, hp_slot);
set_SOGO(ctrl);
/* Wait for SOBS to be unset */
wait_for_ctrl_irq(ctrl);
dbg("%s: before down\n", __func__);
mutex_lock(&ctrl->crit_sect);
dbg("%s: after down\n", __func__);
dbg("%s: before slot_enable\n", __func__);
slot_enable(ctrl, hp_slot);
dbg("%s: before green_LED_blink\n", __func__);
green_LED_blink(ctrl, hp_slot);
dbg("%s: before amber_LED_blink\n", __func__);
amber_LED_off(ctrl, hp_slot);
dbg("%s: before set_SOGO\n", __func__);
set_SOGO(ctrl);
/* Wait for SOBS to be unset */
dbg("%s: before wait_for_ctrl_irq\n", __func__);
wait_for_ctrl_irq(ctrl);
dbg("%s: after wait_for_ctrl_irq\n", __func__);
dbg("%s: before up\n", __func__);
mutex_unlock(&ctrl->crit_sect);
dbg("%s: after up\n", __func__);
/* Wait for ~1 second because of hot plug spec */
dbg("%s: before long_delay\n", __func__);
long_delay(1*HZ);
dbg("%s: after long_delay\n", __func__);
dbg("%s: func status = %x\n", __func__, func->status); /* Check for a power fault */ if (func->status == 0xFF) { /* power fault occurred, but it was benign */
temp_register = 0xFFFFFFFF;
dbg("%s: temp register set to %x by power fault\n", __func__, temp_register);
rc = POWER_FAILURE;
func->status = 0;
} else { /* Get vendor/device ID u32 */
ctrl->pci_bus->number = func->bus;
rc = pci_bus_read_config_dword(ctrl->pci_bus, PCI_DEVFN(func->device, func->function), PCI_VENDOR_ID, &temp_register);
dbg("%s: pci_read_config_dword returns %d\n", __func__, rc);
dbg("%s: temp_register is %x\n", __func__, temp_register);
if (rc != 0) { /* Something's wrong here */
temp_register = 0xFFFFFFFF;
dbg("%s: temp register set to %x by error\n", __func__, temp_register);
} /* Preset return code. It will be changed later if things go okay. */
rc = NO_ADAPTER_PRESENT;
}
/* All F's is an empty slot or an invalid board */ if (temp_register != 0xFFFFFFFF) {
res_lists.io_head = ctrl->io_head;
res_lists.mem_head = ctrl->mem_head;
res_lists.p_mem_head = ctrl->p_mem_head;
res_lists.bus_head = ctrl->bus_head;
res_lists.irqs = NULL;
/* next, we will instantiate the linux pci_dev structures (with
* appropriate driver notification, if already present) */
dbg("%s: configure linux pci_dev structure\n", __func__);
index = 0; do {
new_slot = cpqhp_slot_find(ctrl->bus, func->device, index++); if (new_slot && !new_slot->pci_dev)
cpqhp_configure_device(ctrl, new_slot);
} while (new_slot);
mutex_lock(&ctrl->crit_sect);
green_LED_on(ctrl, hp_slot);
set_SOGO(ctrl);
/* Wait for SOBS to be unset */
wait_for_ctrl_irq(ctrl);
/* When we get here, it is safe to change base address registers.
* We will attempt to save the base address register lengths */ if (replace_flag || !ctrl->add_support)
cpqhp_save_base_addr_length(ctrl, func); elseif (!func->bus_head && !func->mem_head &&
!func->p_mem_head && !func->io_head) { /* Here we check to see if we've saved any of the board's * resources already. If so, we'll skip the attempt to
* determine what's being used. */
index = 0;
temp_func = cpqhp_slot_find(func->bus, func->device, index++); while (temp_func) { if (temp_func->bus_head || temp_func->mem_head
|| temp_func->p_mem_head || temp_func->io_head) {
skip = 1; break;
}
temp_func = cpqhp_slot_find(temp_func->bus, temp_func->device, index++);
}
if (!skip)
cpqhp_save_used_resources(ctrl, func);
} /* Change status to shutdown */ if (func->is_a_board)
func->status = 0x01;
func->configured = 0;
if (p_slot->state == BLINKINGOFF_STATE) { /* slot is on */
dbg("turn on green LED\n");
green_LED_on(ctrl, hp_slot);
} elseif (p_slot->state == BLINKINGON_STATE) { /* slot is off */
dbg("turn off green LED\n");
green_LED_off(ctrl, hp_slot);
}
info(msg_button_cancel, p_slot->number);
p_slot->state = STATIC_STATE;
amber_LED_off(ctrl, hp_slot);
set_SOGO(ctrl);
/* Wait for SOBS to be unset */
wait_for_ctrl_irq(ctrl);
mutex_unlock(&ctrl->crit_sect);
} /*** button Released (No action on press...) */ elseif (ctrl->event_queue[loop].event_type == INT_BUTTON_RELEASE) {
dbg("button release\n");
if (is_slot_enabled(ctrl, hp_slot)) {
dbg("slot is on\n");
p_slot->state = BLINKINGOFF_STATE;
info(msg_button_off, p_slot->number);
} else {
dbg("slot is off\n");
p_slot->state = BLINKINGON_STATE;
info(msg_button_on, p_slot->number);
}
mutex_lock(&ctrl->crit_sect);
/* We have to save the presence info for these slots */
temp_word = ctrl->ctrl_int_comp >> 16;
func->presence_save = (temp_word >> hp_slot) & 0x01;
func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
/* We have to save the presence info for these slots */
temp_word = ctrl->ctrl_int_comp >> 16;
func->presence_save = (temp_word >> hp_slot) & 0x01;
func->presence_save |=
(temp_word >> (hp_slot + 7)) & 0x02;
/* Make sure there are no video controllers here */ 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 & PCI_HEADER_TYPE_MASK) == 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 = cpqhp_slot_find(ctrl->bus, device, 0); if ((func != NULL) && !rc) { /* FIXME: Replace flag should be passed into process_SS */
replace_flag = !(ctrl->add_support);
rc = remove_board(func, replace_flag, ctrl);
} elseif (!rc) {
rc = 1;
}
return rc;
}
/** * switch_leds - switch the leds, go from one site to the other. * @ctrl: controller to use * @num_of_slots: number of slots to use * @work_LED: LED control value * @direction: 1 to start from the left side, 0 to start right.
*/ staticvoid switch_leds(struct controller *ctrl, constint num_of_slots,
u32 *work_LED, constint direction)
{ int loop;
/* Wait for SOGO interrupt */
wait_for_ctrl_irq(ctrl);
/* Get ready for next iteration */
long_delay((2*HZ)/10);
}
}
/** * cpqhp_hardware_test - runs hardware tests * @ctrl: target controller * @test_num: the number written to the "test" file in sysfs. * * For hot plug ctrl folks to play with.
*/ int cpqhp_hardware_test(struct controller *ctrl, int test_num)
{
u32 save_LED;
u32 work_LED; int loop; int num_of_slots;
/* Do that funky LED thing */ /* so we can restore them later */
save_LED = readl(ctrl->hpc_reg + LED_CONTROL);
work_LED = 0x01010101;
switch_leds(ctrl, num_of_slots, &work_LED, 0);
switch_leds(ctrl, num_of_slots, &work_LED, 1);
switch_leds(ctrl, num_of_slots, &work_LED, 0);
switch_leds(ctrl, num_of_slots, &work_LED, 1);
/* Wait for SOGO interrupt */
wait_for_ctrl_irq(ctrl);
/* Get ready for next iteration */
long_delay((3*HZ)/10);
work_LED = work_LED >> 16;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
set_SOGO(ctrl);
/* Wait for SOGO interrupt */
wait_for_ctrl_irq(ctrl);
/* Get ready for next iteration */
long_delay((3*HZ)/10);
work_LED = work_LED << 16;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
work_LED = work_LED << 1;
writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
}
/* put it back the way it was */
writel(save_LED, ctrl->hpc_reg + LED_CONTROL);
set_SOGO(ctrl);
/* Wait for SOBS to be unset */
wait_for_ctrl_irq(ctrl); break; case 2: /* Do other stuff here! */ break; case 3: /* and more... */ break;
} return 0;
}
/** * 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 temp_byte, function, max_functions, stop_it; int rc;
u32 ID; struct pci_func *new_slot; int index;
/* Check for Bridge */
rc = pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &temp_byte); if (rc) return rc;
if ((temp_byte & PCI_HEADER_TYPE_MASK) == PCI_HEADER_TYPE_BRIDGE) { /* set Primary bus */
dbg("set Primary bus = %d\n", func->bus);
rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_PRIMARY_BUS, func->bus); if (rc) return rc;
/* find range of buses to use */
dbg("find ranges of buses to use\n");
bus_node = get_max_resource(&(resources->bus_head), 1);
/* If we don't have any buses to allocate, we can't continue */ if (!bus_node) return -ENOMEM;
/* set Secondary bus */
temp_byte = bus_node->base;
dbg("set Secondary bus = %d\n", bus_node->base);
rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, temp_byte); if (rc) return rc;
/* set subordinate bus */
temp_byte = bus_node->base + bus_node->length - 1;
dbg("set subordinate bus = %d\n", bus_node->base + bus_node->length - 1);
rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte); if (rc) return rc;
/* set subordinate Latency Timer and base Latency Timer */
temp_byte = 0x40;
rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte); if (rc) return rc;
rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte); if (rc) return rc;
/* set Cache Line size */
temp_byte = 0x08;
rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte); if (rc) return rc;
/* Setup the IO, memory, and prefetchable windows */
io_node = get_max_resource(&(resources->io_head), 0x1000); if (!io_node) return -ENOMEM;
mem_node = get_max_resource(&(resources->mem_head), 0x100000); if (!mem_node) return -ENOMEM;
p_mem_node = get_max_resource(&(resources->p_mem_head), 0x100000); if (!p_mem_node) return -ENOMEM;
dbg("Setup the IO, memory, and prefetchable windows\n");
dbg("io_node\n");
dbg("(base, len, next) (%x, %x, %p)\n", io_node->base,
io_node->length, io_node->next);
dbg("mem_node\n");
dbg("(base, len, next) (%x, %x, %p)\n", mem_node->base,
mem_node->length, mem_node->next);
dbg("p_mem_node\n");
dbg("(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(*hold_bus_node), GFP_KERNEL);
hold_IO_node = kmalloc(sizeof(*hold_IO_node), GFP_KERNEL);
hold_mem_node = kmalloc(sizeof(*hold_mem_node), GFP_KERNEL);
hold_p_mem_node = kmalloc(sizeof(*hold_p_mem_node), GFP_KERNEL);
/* If we have IO resources copy them and fill in the bridge's
* IO range registers */
memcpy(hold_IO_node, io_node, sizeof(struct pci_resource));
io_node->next = NULL;
/* set IO base and Limit registers */
temp_byte = io_node->base >> 8;
rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_BASE, temp_byte);
/* Copy the memory resources and fill in the bridge's memory * range registers.
*/
memcpy(hold_mem_node, mem_node, sizeof(struct pci_resource));
mem_node->next = NULL;
/* set Mem base and Limit registers */
temp_word = mem_node->base >> 16;
rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
/* set Pre Mem base and Limit registers */
temp_word = p_mem_node->base >> 16;
rc = pci_bus_write_config_word(pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
/* 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;
rc = configure_new_device(ctrl, new_slot, 1, &temp_resources);
dbg("configure_new_device rc=0x%x\n", rc);
} /* End of IF (device in slot?) */
} /* End of FOR loop */
if (rc) goto free_and_out; /* 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;
} elseif (!behind_bridge) { /* We need to hook up the interrupts here */ for (cloop = 0; cloop < 4; cloop++) { if (irqs.valid_INT & (0x01 << cloop)) {
rc = cpqhp_set_irq(func->bus, func->device,
cloop + 1, irqs.interrupt[cloop]); if (rc) goto free_and_out;
}
} /* end of for loop */
} /* Return unused bus resources * First use the temporary node to store information for
* the board */ if (bus_node && temp_resources.bus_head) {
hold_bus_node->length = bus_node->base - hold_bus_node->base;
/* 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;
/* 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;
return_resource(&(resources->io_head), io_node);
} else { /* it doesn't need any IO */
temp_word = 0x0000;
rc = pci_bus_write_config_word(pci_bus, devfn, PCI_IO_LIMIT, temp_word);
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;
}
} elseif (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 */
--> --------------------
--> maximum size reached
--> --------------------
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