mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 17:59:32 +00:00
microblaze/pci: Remove powermac originated cruft
The whole business with re-assigning all bus numbers, creating an OF bus "map" etc... is ancient powermac stuff that you really don't care about on microblaze. Similarly pci_device_from_OF_node() is unused and by getting rid of it we can get rid of a whole lot of code otherwise unused on this architecture Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
parent
98d9f30c82
commit
72bdee79f8
3 changed files with 3 additions and 275 deletions
|
@ -19,9 +19,6 @@ enum {
|
|||
*/
|
||||
PCI_REASSIGN_ALL_RSRC = 0x00000001,
|
||||
|
||||
/* Re-assign all bus numbers */
|
||||
PCI_REASSIGN_ALL_BUS = 0x00000002,
|
||||
|
||||
/* Do not try to assign, just use existing setup */
|
||||
PCI_PROBE_ONLY = 0x00000004,
|
||||
|
||||
|
|
|
@ -40,8 +40,7 @@ struct pci_dev;
|
|||
* Set this to 1 if you want the kernel to re-assign all PCI
|
||||
* bus numbers (don't do that on ppc64 yet !)
|
||||
*/
|
||||
#define pcibios_assign_all_busses() \
|
||||
(pci_has_flag(PCI_REASSIGN_ALL_BUS))
|
||||
#define pcibios_assign_all_busses() 0
|
||||
|
||||
static inline void pcibios_set_master(struct pci_dev *dev)
|
||||
{
|
||||
|
|
|
@ -28,261 +28,8 @@
|
|||
|
||||
unsigned long isa_io_base;
|
||||
unsigned long pci_dram_offset;
|
||||
int pcibios_assign_bus_offset = 1;
|
||||
|
||||
static u8 *pci_to_OF_bus_map;
|
||||
|
||||
/* By default, we don't re-assign bus numbers. We do this only on
|
||||
* some pmacs
|
||||
*/
|
||||
static int pci_assign_all_buses;
|
||||
|
||||
static int pci_bus_count;
|
||||
|
||||
/*
|
||||
* Functions below are used on OpenFirmware machines.
|
||||
*/
|
||||
static void
|
||||
make_one_node_map(struct device_node *node, u8 pci_bus)
|
||||
{
|
||||
const int *bus_range;
|
||||
int len;
|
||||
|
||||
if (pci_bus >= pci_bus_count)
|
||||
return;
|
||||
bus_range = of_get_property(node, "bus-range", &len);
|
||||
if (bus_range == NULL || len < 2 * sizeof(int)) {
|
||||
printk(KERN_WARNING "Can't get bus-range for %s, "
|
||||
"assuming it starts at 0\n", node->full_name);
|
||||
pci_to_OF_bus_map[pci_bus] = 0;
|
||||
} else
|
||||
pci_to_OF_bus_map[pci_bus] = bus_range[0];
|
||||
|
||||
for_each_child_of_node(node, node) {
|
||||
struct pci_dev *dev;
|
||||
const unsigned int *class_code, *reg;
|
||||
|
||||
class_code = of_get_property(node, "class-code", NULL);
|
||||
if (!class_code ||
|
||||
((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
|
||||
(*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS))
|
||||
continue;
|
||||
reg = of_get_property(node, "reg", NULL);
|
||||
if (!reg)
|
||||
continue;
|
||||
dev = pci_get_bus_and_slot(pci_bus, ((reg[0] >> 8) & 0xff));
|
||||
if (!dev || !dev->subordinate) {
|
||||
pci_dev_put(dev);
|
||||
continue;
|
||||
}
|
||||
make_one_node_map(node, dev->subordinate->number);
|
||||
pci_dev_put(dev);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
pcibios_make_OF_bus_map(void)
|
||||
{
|
||||
int i;
|
||||
struct pci_controller *hose, *tmp;
|
||||
struct property *map_prop;
|
||||
struct device_node *dn;
|
||||
|
||||
pci_to_OF_bus_map = kmalloc(pci_bus_count, GFP_KERNEL);
|
||||
if (!pci_to_OF_bus_map) {
|
||||
printk(KERN_ERR "Can't allocate OF bus map !\n");
|
||||
return;
|
||||
}
|
||||
|
||||
/* We fill the bus map with invalid values, that helps
|
||||
* debugging.
|
||||
*/
|
||||
for (i = 0; i < pci_bus_count; i++)
|
||||
pci_to_OF_bus_map[i] = 0xff;
|
||||
|
||||
/* For each hose, we begin searching bridges */
|
||||
list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
|
||||
struct device_node *node = hose->dn;
|
||||
|
||||
if (!node)
|
||||
continue;
|
||||
make_one_node_map(node, hose->first_busno);
|
||||
}
|
||||
dn = of_find_node_by_path("/");
|
||||
map_prop = of_find_property(dn, "pci-OF-bus-map", NULL);
|
||||
if (map_prop) {
|
||||
BUG_ON(pci_bus_count > map_prop->length);
|
||||
memcpy(map_prop->value, pci_to_OF_bus_map, pci_bus_count);
|
||||
}
|
||||
of_node_put(dn);
|
||||
#ifdef DEBUG
|
||||
printk(KERN_INFO "PCI->OF bus map:\n");
|
||||
for (i = 0; i < pci_bus_count; i++) {
|
||||
if (pci_to_OF_bus_map[i] == 0xff)
|
||||
continue;
|
||||
printk(KERN_INFO "%d -> %d\n", i, pci_to_OF_bus_map[i]);
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
typedef int (*pci_OF_scan_iterator)(struct device_node *node, void *data);
|
||||
|
||||
static struct device_node *scan_OF_pci_childs(struct device_node *parent,
|
||||
pci_OF_scan_iterator filter, void *data)
|
||||
{
|
||||
struct device_node *node;
|
||||
struct device_node *sub_node;
|
||||
|
||||
for_each_child_of_node(parent, node) {
|
||||
const unsigned int *class_code;
|
||||
|
||||
if (filter(node, data)) {
|
||||
of_node_put(node);
|
||||
return node;
|
||||
}
|
||||
|
||||
/* For PCI<->PCI bridges or CardBus bridges, we go down
|
||||
* Note: some OFs create a parent node "multifunc-device" as
|
||||
* a fake root for all functions of a multi-function device,
|
||||
* we go down them as well.
|
||||
*/
|
||||
class_code = of_get_property(node, "class-code", NULL);
|
||||
if ((!class_code ||
|
||||
((*class_code >> 8) != PCI_CLASS_BRIDGE_PCI &&
|
||||
(*class_code >> 8) != PCI_CLASS_BRIDGE_CARDBUS)) &&
|
||||
strcmp(node->name, "multifunc-device"))
|
||||
continue;
|
||||
sub_node = scan_OF_pci_childs(node, filter, data);
|
||||
if (sub_node) {
|
||||
of_node_put(node);
|
||||
return sub_node;
|
||||
}
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static struct device_node *scan_OF_for_pci_dev(struct device_node *parent,
|
||||
unsigned int devfn)
|
||||
{
|
||||
struct device_node *np, *cnp;
|
||||
const u32 *reg;
|
||||
unsigned int psize;
|
||||
|
||||
for_each_child_of_node(parent, np) {
|
||||
reg = of_get_property(np, "reg", &psize);
|
||||
if (reg && psize >= 4 && ((reg[0] >> 8) & 0xff) == devfn)
|
||||
return np;
|
||||
|
||||
/* Note: some OFs create a parent node "multifunc-device" as
|
||||
* a fake root for all functions of a multi-function device,
|
||||
* we go down them as well. */
|
||||
if (!strcmp(np->name, "multifunc-device")) {
|
||||
cnp = scan_OF_for_pci_dev(np, devfn);
|
||||
if (cnp)
|
||||
return cnp;
|
||||
}
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
static struct device_node *scan_OF_for_pci_bus(struct pci_bus *bus)
|
||||
{
|
||||
struct device_node *parent, *np;
|
||||
|
||||
/* Are we a root bus ? */
|
||||
if (bus->self == NULL || bus->parent == NULL) {
|
||||
struct pci_controller *hose = pci_bus_to_host(bus);
|
||||
if (hose == NULL)
|
||||
return NULL;
|
||||
return of_node_get(hose->dn);
|
||||
}
|
||||
|
||||
/* not a root bus, we need to get our parent */
|
||||
parent = scan_OF_for_pci_bus(bus->parent);
|
||||
if (parent == NULL)
|
||||
return NULL;
|
||||
|
||||
/* now iterate for children for a match */
|
||||
np = scan_OF_for_pci_dev(parent, bus->self->devfn);
|
||||
of_node_put(parent);
|
||||
|
||||
return np;
|
||||
}
|
||||
|
||||
static int
|
||||
find_OF_pci_device_filter(struct device_node *node, void *data)
|
||||
{
|
||||
return ((void *)node == data);
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns the PCI device matching a given OF node
|
||||
*/
|
||||
int
|
||||
pci_device_from_OF_node(struct device_node *node, u8 *bus, u8 *devfn)
|
||||
{
|
||||
const unsigned int *reg;
|
||||
struct pci_controller *hose;
|
||||
struct pci_dev *dev = NULL;
|
||||
|
||||
/* Make sure it's really a PCI device */
|
||||
hose = pci_find_hose_for_OF_device(node);
|
||||
if (!hose || !hose->dn)
|
||||
return -ENODEV;
|
||||
if (!scan_OF_pci_childs(hose->dn,
|
||||
find_OF_pci_device_filter, (void *)node))
|
||||
return -ENODEV;
|
||||
reg = of_get_property(node, "reg", NULL);
|
||||
if (!reg)
|
||||
return -ENODEV;
|
||||
*bus = (reg[0] >> 16) & 0xff;
|
||||
*devfn = ((reg[0] >> 8) & 0xff);
|
||||
|
||||
/* Ok, here we need some tweak. If we have already renumbered
|
||||
* all busses, we can't rely on the OF bus number any more.
|
||||
* the pci_to_OF_bus_map is not enough as several PCI busses
|
||||
* may match the same OF bus number.
|
||||
*/
|
||||
if (!pci_to_OF_bus_map)
|
||||
return 0;
|
||||
|
||||
for_each_pci_dev(dev)
|
||||
if (pci_to_OF_bus_map[dev->bus->number] == *bus &&
|
||||
dev->devfn == *devfn) {
|
||||
*bus = dev->bus->number;
|
||||
pci_dev_put(dev);
|
||||
return 0;
|
||||
}
|
||||
|
||||
return -ENODEV;
|
||||
}
|
||||
EXPORT_SYMBOL(pci_device_from_OF_node);
|
||||
|
||||
/* We create the "pci-OF-bus-map" property now so it appears in the
|
||||
* /proc device tree
|
||||
*/
|
||||
void __init
|
||||
pci_create_OF_bus_map(void)
|
||||
{
|
||||
struct property *of_prop;
|
||||
struct device_node *dn;
|
||||
|
||||
of_prop = (struct property *) alloc_bootmem(sizeof(struct property) + \
|
||||
256);
|
||||
if (!of_prop)
|
||||
return;
|
||||
dn = of_find_node_by_path("/");
|
||||
if (dn) {
|
||||
memset(of_prop, -1, sizeof(struct property) + 256);
|
||||
of_prop->name = "pci-OF-bus-map";
|
||||
of_prop->length = 256;
|
||||
of_prop->value = &of_prop[1];
|
||||
prom_add_property(dn, of_prop);
|
||||
of_node_put(dn);
|
||||
}
|
||||
}
|
||||
|
||||
struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus)
|
||||
{
|
||||
struct pci_controller *hose = bus->sysdata;
|
||||
|
@ -329,32 +76,17 @@ static int __init pcibios_init(void)
|
|||
|
||||
printk(KERN_INFO "PCI: Probing PCI hardware\n");
|
||||
|
||||
if (pci_flags & PCI_REASSIGN_ALL_BUS) {
|
||||
printk(KERN_INFO "setting pci_asign_all_busses\n");
|
||||
pci_assign_all_buses = 1;
|
||||
}
|
||||
|
||||
/* Scan all of the recorded PCI controllers. */
|
||||
list_for_each_entry_safe(hose, tmp, &hose_list, list_node) {
|
||||
if (pci_assign_all_buses)
|
||||
hose->first_busno = next_busno;
|
||||
hose->last_busno = 0xff;
|
||||
pcibios_scan_phb(hose);
|
||||
printk(KERN_INFO "calling pci_bus_add_devices()\n");
|
||||
pci_bus_add_devices(hose->bus);
|
||||
if (pci_assign_all_buses || next_busno <= hose->last_busno)
|
||||
next_busno = hose->last_busno + \
|
||||
pcibios_assign_bus_offset;
|
||||
if (next_busno <= hose->last_busno)
|
||||
next_busno = hose->last_busno + 1;
|
||||
}
|
||||
pci_bus_count = next_busno;
|
||||
|
||||
/* OpenFirmware based machines need a map of OF bus
|
||||
* numbers vs. kernel bus numbers since we may have to
|
||||
* remap them.
|
||||
*/
|
||||
if (pci_assign_all_buses)
|
||||
pcibios_make_OF_bus_map();
|
||||
|
||||
/* Call common code to handle resource allocation */
|
||||
pcibios_resource_survey();
|
||||
|
||||
|
|
Loading…
Reference in a new issue