[PATCH] pciehp: remove redundant data structures
State information is currently stored in per-slot as well as
per-pci-function data structures in pciehp. There's a lot of
overlap in the information kept, and some of it is never used.
This patch consolidates the state information to per-slot and
eliminates unused data structures. The biggest change is to
eliminate the pci_func structure and the code around managing
its lists.
Signed-off-by: Rajesh Shah <rajesh.shah@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/pci/hotplug/pciehp.h b/drivers/pci/hotplug/pciehp.h
index e9c0956..3e17e3d 100644
--- a/drivers/pci/hotplug/pciehp.h
+++ b/drivers/pci/hotplug/pciehp.h
@@ -56,25 +56,11 @@
u8 enable_perr;
};
-struct pci_func {
- struct pci_func *next;
- u8 bus;
- u8 device;
- u8 function;
- u8 is_a_board;
- u16 status;
- u8 configured;
- u8 switch_save;
- u8 presence_save;
- u16 reserved2;
- u32 config_space[0x20];
- struct pci_dev* pci_dev;
-};
-
struct slot {
struct slot *next;
u8 bus;
u8 device;
+ u16 status;
u32 number;
u8 is_a_board;
u8 configured;
@@ -177,9 +163,6 @@
* error Messages
*/
#define msg_initialization_err "Initialization failure, error=%d\n"
-#define msg_HPC_rev_error "Unsupported revision of the PCI hot plug controller found.\n"
-#define msg_HPC_non_pcie "The PCI hot plug controller is not supported by this driver.\n"
-#define msg_HPC_not_supported "This system is not supported by this version of pciephd module. Upgrade to a newer version of pciehpd\n"
#define msg_button_on "PCI slot #%d - powering on due to button press.\n"
#define msg_button_off "PCI slot #%d - powering off due to button press.\n"
#define msg_button_cancel "PCI slot #%d - action canceled due to button press.\n"
@@ -188,8 +171,6 @@
/* controller functions */
extern int pciehp_event_start_thread (void);
extern void pciehp_event_stop_thread (void);
-extern struct pci_func *pciehp_slot_create (unsigned char busnumber);
-extern struct pci_func *pciehp_slot_find (unsigned char bus, unsigned char device, unsigned char index);
extern int pciehp_enable_slot (struct slot *slot);
extern int pciehp_disable_slot (struct slot *slot);
@@ -200,12 +181,8 @@
/* extern void long_delay (int delay); */
/* pci functions */
-extern int pciehp_set_irq (u8 bus_num, u8 dev_num, u8 int_pin, u8 irq_num);
-/*extern int pciehp_get_bus_dev (struct controller *ctrl, u8 *bus_num, u8 *dev_num, struct slot *slot);*/
-extern int pciehp_save_config (struct controller *ctrl, int busnumber, int num_ctlr_slots, int first_device_num);
-extern int pciehp_save_slot_config (struct controller *ctrl, struct pci_func * new_slot);
-extern int pciehp_configure_device (struct slot *ctrl);
-extern int pciehp_unconfigure_device (struct pci_func* func);
+extern int pciehp_configure_device (struct slot *p_slot);
+extern int pciehp_unconfigure_device (struct slot *p_slot);
extern int get_hp_hw_control_from_firmware(struct pci_dev *dev);
extern void get_hp_params_from_firmware(struct pci_dev *dev,
struct hotplug_params *hpp);
@@ -214,7 +191,6 @@
/* Global variables */
extern struct controller *pciehp_ctrl_list;
-extern struct pci_func *pciehp_slot_list[256];
/* Inline functions */
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
index e20cf8e..be60856 100644
--- a/drivers/pci/hotplug/pciehp_core.c
+++ b/drivers/pci/hotplug/pciehp_core.c
@@ -46,7 +46,6 @@
int pciehp_poll_mode;
int pciehp_poll_time;
struct controller *pciehp_ctrl_list;
-struct pci_func *pciehp_slot_list[256];
#define DRIVER_VERSION "0.4"
#define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>"
@@ -422,15 +421,6 @@
first_device_num = ctrl->slot_device_offset;
num_ctlr_slots = ctrl->num_slots;
- /* Store PCI Config Space for all devices on this bus */
- dbg("%s: Before calling pciehp_save_config, ctrl->bus %x,ctrl->slot_bus %x\n",
- __FUNCTION__,ctrl->bus, ctrl->slot_bus);
- rc = pciehp_save_config(ctrl, ctrl->slot_bus, num_ctlr_slots, first_device_num);
- if (rc) {
- err("%s: unable to save PCI configuration data, error %d\n", __FUNCTION__, rc);
- goto err_out_free_ctrl_bus;
- }
-
ctrl->add_support = 1;
/* Setup the slot information structures */
@@ -491,7 +481,6 @@
static int pcie_start_thread(void)
{
- int loop;
int retval = 0;
dbg("Initialize + Start the notification/polling mechanism \n");
@@ -502,20 +491,11 @@
return retval;
}
- dbg("Initialize slot lists\n");
- /* One slot list for each bus in the system */
- for (loop = 0; loop < 256; loop++) {
- pciehp_slot_list[loop] = NULL;
- }
-
return retval;
}
static void __exit unload_pciehpd(void)
{
- struct pci_func *next;
- struct pci_func *TempSlot;
- int loop;
struct controller *ctrl;
struct controller *tctrl;
@@ -534,15 +514,6 @@
kfree(tctrl);
}
- for (loop = 0; loop < 256; loop++) {
- next = pciehp_slot_list[loop];
- while (next != NULL) {
- TempSlot = next;
- next = next->next;
- kfree(TempSlot);
- }
- }
-
/* Stop the notification mechanism */
pciehp_event_stop_thread();
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index d07d419..b60e497 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -55,19 +55,16 @@
struct slot *p_slot;
u8 rc = 0;
u8 getstatus;
- struct pci_func *func;
struct event_info *taskInfo;
/* Attention Button Change */
dbg("pciehp: Attention button interrupt received.\n");
- func = pciehp_slot_find(ctrl->slot_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]);
p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
- p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
+ p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
ctrl->next_event = (ctrl->next_event + 1) % 10;
@@ -112,14 +109,11 @@
struct slot *p_slot;
u8 rc = 0;
u8 getstatus;
- struct pci_func *func;
struct event_info *taskInfo;
/* Switch Change */
dbg("pciehp: Switch interrupt received.\n");
- func = pciehp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
-
/* This is the structure that tells the worker thread
* what to do
*/
@@ -129,7 +123,7 @@
rc++;
p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
- p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
+ p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
if (getstatus) {
@@ -137,14 +131,14 @@
* Switch opened
*/
info("Latch open on Slot(%d)\n", ctrl->first_slot + hp_slot);
- func->switch_save = 0;
+ p_slot->switch_save = 0;
taskInfo->event_type = INT_SWITCH_OPEN;
} else {
/*
* Switch closed
*/
info("Latch close on Slot(%d)\n", ctrl->first_slot + hp_slot);
- func->switch_save = 0x10;
+ p_slot->switch_save = 0x10;
taskInfo->event_type = INT_SWITCH_CLOSE;
}
@@ -159,14 +153,11 @@
struct controller *ctrl = (struct controller *) inst_id;
struct slot *p_slot;
u8 rc = 0;
- struct pci_func *func;
struct event_info *taskInfo;
/* Presence Change */
dbg("pciehp: Presence/Notify input change.\n");
- func = pciehp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
-
/* This is the structure that tells the worker thread
* what to do
*/
@@ -180,8 +171,8 @@
/* Switch is open, assume a presence change
* Save the presence state
*/
- p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
- if (func->presence_save) {
+ p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
+ if (p_slot->presence_save) {
/*
* Card Present
*/
@@ -206,14 +197,11 @@
struct controller *ctrl = (struct controller *) inst_id;
struct slot *p_slot;
u8 rc = 0;
- struct pci_func *func;
struct event_info *taskInfo;
/* power fault */
dbg("pciehp: Power fault interrupt received.\n");
- func = pciehp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
-
/* this is the structure that tells the worker thread
* what to do
*/
@@ -229,7 +217,7 @@
* power fault Cleared
*/
info("Power fault cleared on Slot(%d)\n", ctrl->first_slot + hp_slot);
- func->status = 0x00;
+ p_slot->status = 0x00;
taskInfo->event_type = INT_POWER_FAULT_CLEAR;
} else {
/*
@@ -238,7 +226,7 @@
info("Power fault on Slot(%d)\n", ctrl->first_slot + hp_slot);
taskInfo->event_type = INT_POWER_FAULT;
/* set power fault status for this board */
- func->status = 0xFF;
+ p_slot->status = 0xFF;
info("power fault bit %x set\n", hp_slot);
}
if (rc)
@@ -247,187 +235,6 @@
return rc;
}
-/**
- * pciehp_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 *pciehp_slot_create(u8 busnumber)
-{
- struct pci_func *new_slot;
- struct pci_func *next;
- dbg("%s: busnumber %x\n", __FUNCTION__, busnumber);
- new_slot = kmalloc(sizeof(struct pci_func), GFP_KERNEL);
-
- if (new_slot == NULL)
- return new_slot;
-
- memset(new_slot, 0, sizeof(struct pci_func));
-
- new_slot->next = NULL;
- new_slot->configured = 1;
-
- if (pciehp_slot_list[busnumber] == NULL) {
- pciehp_slot_list[busnumber] = new_slot;
- } else {
- next = pciehp_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.
- */
-static int slot_remove(struct pci_func * old_slot)
-{
- struct pci_func *next;
-
- if (old_slot == NULL)
- return 1;
-
- next = pciehp_slot_list[old_slot->bus];
-
- if (next == NULL)
- return 1;
-
- if (next == old_slot) {
- pciehp_slot_list[old_slot->bus] = old_slot->next;
- kfree(old_slot);
- return 0;
- }
-
- while ((next->next != old_slot) && (next->next != NULL)) {
- next = next->next;
- }
-
- if (next->next == old_slot) {
- next->next = old_slot->next;
- kfree(old_slot);
- return 0;
- } else
- return 2;
-}
-
-
-/**
- * bridge_slot_remove - Removes a node from the linked list of slots.
- * @bridge: bridge to remove
- *
- * Returns 0 if successful, !0 otherwise.
- */
-static int bridge_slot_remove(struct pci_func *bridge)
-{
- 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 = pciehp_slot_list[tempBus];
-
- while (!slot_remove(next)) {
- next = pciehp_slot_list[tempBus];
- }
- }
-
- next = pciehp_slot_list[bridge->bus];
-
- if (next == NULL) {
- return 1;
- }
-
- if (next == bridge) {
- pciehp_slot_list[bridge->bus] = bridge->next;
- kfree(bridge);
- return 0;
- }
-
- while ((next->next != bridge) && (next->next != NULL)) {
- next = next->next;
- }
-
- if (next->next == bridge) {
- next->next = bridge->next;
- kfree(bridge);
- return 0;
- } else
- return 2;
-}
-
-
-/**
- * pciehp_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 *pciehp_slot_find(u8 bus, u8 device, u8 index)
-{
- int found = -1;
- struct pci_func *func;
-
- func = pciehp_slot_list[bus];
- dbg("%s: bus %x device %x index %x\n",
- __FUNCTION__, bus, device, index);
- if (func != NULL) {
- dbg("%s: func-> bus %x device %x function %x pci_dev %p\n",
- __FUNCTION__, func->bus, func->device, func->function,
- func->pci_dev);
- } else
- dbg("%s: func == NULL\n", __FUNCTION__);
-
- if ((func == NULL) || ((func->device == device) && (index == 0)))
- return func;
-
- if (func->device == device)
- found++;
-
- while (func->next != NULL) {
- func = func->next;
-
- dbg("%s: In while loop, func-> bus %x device %x function %x pci_dev %p\n",
- __FUNCTION__, func->bus, func->device, func->function,
- func->pci_dev);
- if (func->device == device)
- found++;
- dbg("%s: while loop, found %d, index %d\n", __FUNCTION__,
- found, index);
-
- if ((found == index) || (func->function == index)) {
- dbg("%s: Found bus %x dev %x func %x\n", __FUNCTION__,
- func->bus, func->device, func->function);
- return func;
- }
- }
-
- return NULL;
-}
-
-static int is_bridge(struct pci_func * func)
-{
- /* Check the header type */
- if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01)
- return 1;
- else
- return 0;
-}
-
-
/* The following routines constitute the bulk of the
hotplug controller logic
*/
@@ -472,17 +279,16 @@
* Configures board
*
*/
-static u32 board_added(struct pci_func * func, struct controller * ctrl)
+static u32 board_added(struct slot *p_slot)
{
u8 hp_slot;
u32 temp_register = 0xFFFFFFFF;
u32 rc = 0;
- struct slot *p_slot;
+ struct controller *ctrl = p_slot->ctrl;
- p_slot = pciehp_find_slot(ctrl, func->device);
- hp_slot = func->device - ctrl->slot_device_offset;
+ hp_slot = p_slot->device - ctrl->slot_device_offset;
- dbg("%s: func->device, slot_offset, hp_slot = %d, %d ,%d\n", __FUNCTION__, func->device, ctrl->slot_device_offset, hp_slot);
+ dbg("%s: p_slot->device, slot_offset, hp_slot = %d, %d ,%d\n", __FUNCTION__, p_slot->device, ctrl->slot_device_offset, hp_slot);
/* Wait for exclusive access to hardware */
down(&ctrl->crit_sect);
@@ -522,15 +328,15 @@
return rc;
}
- dbg("%s: func status = %x\n", __FUNCTION__, func->status);
+ dbg("%s: slot status = %x\n", __FUNCTION__, p_slot->status);
/* Check for a power fault */
- if (func->status == 0xFF) {
+ if (p_slot->status == 0xFF) {
/* power fault occurred, but it was benign */
temp_register = 0xFFFFFFFF;
dbg("%s: temp register set to %x by power fault\n", __FUNCTION__, temp_register);
rc = POWER_FAILURE;
- func->status = 0;
+ p_slot->status = 0;
goto err_exit;
}
@@ -541,10 +347,9 @@
goto err_exit;
}
- pciehp_save_slot_config(ctrl, func);
- func->status = 0;
- func->switch_save = 0x10;
- func->is_a_board = 0x01;
+ p_slot->status = 0;
+ p_slot->switch_save = 0x10;
+ p_slot->is_a_board = 0x01;
/*
* Some PCI Express root ports require fixup after hot-plug operation.
@@ -575,30 +380,27 @@
* remove_board - Turns off slot and LED's
*
*/
-static u32 remove_board(struct pci_func *func, struct controller *ctrl)
+static u32 remove_board(struct slot *p_slot)
{
u8 device;
u8 hp_slot;
u32 rc;
- struct slot *p_slot;
+ struct controller *ctrl = p_slot->ctrl;
- if (func == NULL)
+ if (pciehp_unconfigure_device(p_slot))
return 1;
- if (pciehp_unconfigure_device(func))
- return 1;
+ device = p_slot->device;
- device = func->device;
-
- hp_slot = func->device - ctrl->slot_device_offset;
+ hp_slot = p_slot->device - ctrl->slot_device_offset;
p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot);
/* Change status to shutdown */
- if (func->is_a_board)
- func->status = 0x01;
- func->configured = 0;
+ if (p_slot->is_a_board)
+ p_slot->status = 0x01;
+ p_slot->configured = 0;
/* Wait for exclusive access to hardware */
down(&ctrl->crit_sect);
@@ -626,35 +428,8 @@
/* Done with exclusive hardware access */
up(&ctrl->crit_sect);
- if (ctrl->add_support) {
- while (func) {
- if (is_bridge(func)) {
- 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);
- } else {
- dbg("PCI Function Hot-Remove s:b:d:f(%02x:%02x:%02x:%02x)\n",
- ctrl->seg, func->bus, func->device, func->function);
- slot_remove(func);
- }
-
- func = pciehp_slot_find(ctrl->slot_bus, device, 0);
- }
-
- /* Setup slot structure with entry for empty slot */
- func = pciehp_slot_create(ctrl->slot_bus);
-
- if (func == NULL) {
- return 1;
- }
-
- func->bus = ctrl->slot_bus;
- func->device = device;
- func->function = 0;
- func->configured = 0;
- func->switch_save = 0x10;
- func->is_a_board = 0;
- }
+ p_slot->switch_save = 0x10;
+ p_slot->is_a_board = 0;
return 0;
}
@@ -851,7 +626,6 @@
{
int loop = 0;
int change = 1;
- struct pci_func *func;
u8 hp_slot;
u8 getstatus;
struct slot *p_slot;
@@ -863,11 +637,9 @@
if (ctrl->event_queue[loop].event_type != 0) {
hp_slot = ctrl->event_queue[loop].hp_slot;
- func = pciehp_slot_find(ctrl->slot_bus, (hp_slot + ctrl->slot_device_offset), 0);
-
p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
- dbg("hp_slot %d, func %p, p_slot %p\n", hp_slot, func, p_slot);
+ dbg("hp_slot %d, p_slot %p\n", hp_slot, p_slot);
if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) {
dbg("button cancel\n");
@@ -1015,13 +787,6 @@
{
u8 getstatus = 0;
int rc;
- struct pci_func *func;
-
- func = pciehp_slot_find(p_slot->bus, p_slot->device, 0);
- if (!func) {
- dbg("%s: Error! slot NULL\n", __FUNCTION__);
- return 1;
- }
/* Check to see if (latch closed, card present, power off) */
down(&p_slot->ctrl->crit_sect);
@@ -1051,45 +816,21 @@
}
up(&p_slot->ctrl->crit_sect);
- slot_remove(func);
-
- func = pciehp_slot_create(p_slot->bus);
- if (func == NULL)
- return 1;
-
- func->bus = p_slot->bus;
- func->device = p_slot->device;
- func->function = 0;
- func->configured = 0;
- func->is_a_board = 1;
+ p_slot->configured = 0;
+ p_slot->is_a_board = 1;
/* We have to save the presence info for these slots */
- p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
+ p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
- func->switch_save = !getstatus? 0x10:0;
+ p_slot->switch_save = !getstatus? 0x10:0;
- rc = board_added(func, p_slot->ctrl);
+ rc = board_added(p_slot);
if (rc) {
- if (is_bridge(func))
- bridge_slot_remove(func);
- else
- slot_remove(func);
-
- /* Setup slot structure with entry for empty slot */
- func = pciehp_slot_create(p_slot->bus);
- if (func == NULL)
- return 1; /* Out of memory */
-
- func->bus = p_slot->bus;
- func->device = p_slot->device;
- func->function = 0;
- func->configured = 0;
- func->is_a_board = 1;
-
/* We have to save the presence info for these slots */
- p_slot->hpc_ops->get_adapter_status(p_slot, &(func->presence_save));
+ p_slot->hpc_ops->get_adapter_status(p_slot,
+ &(p_slot->presence_save));
p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
- func->switch_save = !getstatus? 0x10:0;
+ p_slot->switch_save = !getstatus? 0x10:0;
}
if (p_slot)
@@ -1101,14 +842,8 @@
int pciehp_disable_slot(struct slot *p_slot)
{
- u8 class_code, header_type, BCR;
- u8 index = 0;
u8 getstatus = 0;
- u32 rc = 0;
int ret = 0;
- unsigned int devfn;
- struct pci_bus *pci_bus = p_slot->ctrl->pci_dev->subordinate;
- struct pci_func *func;
if (!p_slot->ctrl)
return 1;
@@ -1145,54 +880,8 @@
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;
+ ret = remove_board(p_slot);
+ update_slot_info(p_slot);
+ return ret;
}
diff --git a/drivers/pci/hotplug/pciehp_pci.c b/drivers/pci/hotplug/pciehp_pci.c
index db59a06..1d185c1 100644
--- a/drivers/pci/hotplug/pciehp_pci.c
+++ b/drivers/pci/hotplug/pciehp_pci.c
@@ -101,346 +101,41 @@
return 0;
}
-int pciehp_unconfigure_device(struct pci_func* func)
+int pciehp_unconfigure_device(struct slot *p_slot)
{
int rc = 0;
int j;
- struct pci_bus *pbus;
+ u8 bctl = 0;
- dbg("%s: bus/dev/func = %x/%x/%x\n", __FUNCTION__, func->bus,
- func->device, func->function);
- pbus = func->pci_dev->bus;
+ dbg("%s: bus/dev = %x/%x\n", __FUNCTION__, p_slot->bus,
+ p_slot->device);
for (j=0; j<8 ; j++) {
- struct pci_dev* temp = pci_find_slot(func->bus,
- (func->device << 3) | j);
- if (temp) {
- pci_remove_bus_device(temp);
+ struct pci_dev* temp = pci_find_slot(p_slot->bus,
+ (p_slot->device << 3) | j);
+ if (!temp)
+ continue;
+ if ((temp->class >> 16) == PCI_BASE_CLASS_DISPLAY) {
+ err("Cannot remove display device %s\n",
+ pci_name(temp));
+ continue;
}
+ if (temp->hdr_type == PCI_HEADER_TYPE_BRIDGE) {
+ pci_read_config_byte(temp, PCI_BRIDGE_CONTROL, &bctl);
+ if (bctl & PCI_BRIDGE_CTL_VGA) {
+ err("Cannot remove display device %s\n",
+ pci_name(temp));
+ continue;
+ }
+ }
+ pci_remove_bus_device(temp);
}
/*
* Some PCI Express root ports require fixup after hot-plug operation.
*/
if (pcie_mch_quirk)
- pci_fixup_device(pci_fixup_final, pbus->self);
+ pci_fixup_device(pci_fixup_final, p_slot->ctrl->pci_dev);
return rc;
}
-/*
- * pciehp_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 pciehp_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 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;
- int FirstSupported, LastSupported;
-
- dbg("%s: Enter\n", __FUNCTION__);
-
- 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 */
- dbg("%s: pci_bus->number = %x\n", __FUNCTION__, pci_bus->number);
- pci_bus->number = busnumber;
- dbg("%s: bus = %x, dev = %x\n", __FUNCTION__, busnumber, device);
- 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 */
- dbg("%s: ID = %x\n", __FUNCTION__, ID);
- 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;
- dbg("%s: In do loop\n", __FUNCTION__);
-
- 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 = pciehp_save_config(ctrl, sub_bus, 0, 0);
- if (rc)
- return rc;
- }
- }
-
- index = 0;
- new_slot = pciehp_slot_find(busnumber, device, index++);
-
- dbg("%s: new_slot = %p bus %x dev %x fun %x\n",
- __FUNCTION__, new_slot, busnumber, device, index-1);
-
- while (new_slot && (new_slot->function != (u8) function)) {
- new_slot = pciehp_slot_find(busnumber, device, index++);
- dbg("%s: while loop, new_slot = %p bus %x dev %x fun %x\n",
- __FUNCTION__, new_slot, busnumber, device, index-1);
- }
- if (!new_slot) {
- /* Setup slot structure. */
- new_slot = pciehp_slot_create(busnumber);
- dbg("%s: if, new_slot = %p bus %x dev %x fun %x\n",
- __FUNCTION__, new_slot, busnumber, device, function);
-
- 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;
- /* 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)) {
- dbg("%s: In while loop \n", __FUNCTION__);
- 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 = pciehp_slot_create(busnumber);
-
- if (new_slot == NULL) {
- return(1);
- }
- dbg("new_slot = %p, bus = %x, dev = %x, fun = %x\n", new_slot,
- new_slot->bus, new_slot->device, new_slot->function);
-
- 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 */
-
- dbg("%s: Exit\n", __FUNCTION__);
- return(0);
-}
-
-
-/*
- * pciehp_save_slot_config
- *
- * Saves configuration info for all PCI devices in a given slot
- * including subordinate busses.
- *
- * returns 0 if success
- */
-int pciehp_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 = pciehp_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;
-}
-