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[SPARC64]: Add dummy host controller to root of all PCI domains.

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We fake up a dummy one in all cases because that is the simplest
thing to do and it happens to be necessary for hypervisor systems.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2007-03-11 16:42:53 -07:00
parent c6e87566ea
commit 97b3cf050b
6 changed files with 128 additions and 29 deletions
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79
arch/sparc64/kernel/pci.c
View File

@ -368,7 +368,8 @@ static void pci_parse_of_addrs(struct of_device *op,
struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
struct device_node *node,
struct pci_bus *bus, int devfn)
struct pci_bus *bus, int devfn,
int host_controller)
{
struct dev_archdata *sd;
struct pci_dev *dev;
@ -400,6 +401,13 @@ struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
dev->devfn = devfn;
dev->multifunction = 0; /* maybe a lie? */
if (host_controller) {
dev->vendor = 0x108e;
dev->device = 0x8000;
dev->subsystem_vendor = 0x0000;
dev->subsystem_device = 0x0000;
dev->cfg_size = 256;
} else {
dev->vendor = of_getintprop_default(node, "vendor-id", 0xffff);
dev->device = of_getintprop_default(node, "device-id", 0xffff);
dev->subsystem_vendor =
@ -408,24 +416,32 @@ struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
of_getintprop_default(node, "subsystem-id", 0);
dev->cfg_size = pci_cfg_space_size(dev);
}
sprintf(pci_name(dev), "%04x:%02x:%02x.%d", pci_domain_nr(bus),
dev->bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn));
/* dev->class = of_getintprop_default(node, "class-code", 0); */
/* We can't actually use the firmware value, we have to read what
* is in the register right now. One reason is that in the case
* of IDE interfaces the firmware can sample the value before the
* the IDE interface is programmed into native mode.
if (host_controller) {
dev->class = PCI_CLASS_BRIDGE_HOST << 8;
} else {
/* We can't actually use the firmware value, we have
* to read what is in the register right now. One
* reason is that in the case of IDE interfaces the
* firmware can sample the value before the the IDE
* interface is programmed into native mode.
*/
pci_read_config_dword(dev, PCI_CLASS_REVISION, &class);
dev->class = class >> 8;
}
printk(" class: 0x%x\n", dev->class);
dev->current_state = 4; /* unknown power state */
dev->error_state = pci_channel_io_normal;
if (host_controller) {
dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
dev->rom_base_reg = PCI_ROM_ADDRESS1;
dev->irq = PCI_IRQ_NONE;
} else {
if (!strcmp(type, "pci") || !strcmp(type, "pciex")) {
/* a PCI-PCI bridge */
dev->hdr_type = PCI_HEADER_TYPE_BRIDGE;
@ -440,7 +456,7 @@ struct pci_dev *of_create_pci_dev(struct pci_pbm_info *pbm,
if (dev->irq == 0xffffffff)
dev->irq = PCI_IRQ_NONE;
}
}
pci_parse_of_addrs(sd->op, node, dev);
printk(" adding to system ...\n");
@ -632,7 +648,7 @@ static void __init pci_of_scan_bus(struct pci_pbm_info *pbm,
devfn = (reg[0] >> 8) & 0xff;
/* create a new pci_dev for this device */
dev = of_create_pci_dev(pbm, child, bus, devfn);
dev = of_create_pci_dev(pbm, child, bus, devfn, 0);
if (!dev)
continue;
printk("PCI: dev header type: %x\n", dev->hdr_type);
@ -677,10 +693,49 @@ static void __devinit pci_bus_register_of_sysfs(struct pci_bus *bus)
pci_bus_register_of_sysfs(child_bus);
}
int pci_host_bridge_read_pci_cfg(struct pci_bus *bus_dev,
unsigned int devfn,
int where, int size,
u32 *value)
{
static u8 fake_pci_config[] = {
0x8e, 0x10, /* Vendor: 0x108e (Sun) */
0x00, 0x80, /* Device: 0x8000 (PBM) */
0x46, 0x01, /* Command: 0x0146 (SERR, PARITY, MASTER, MEM) */
0xa0, 0x22, /* Status: 0x02a0 (DEVSEL_MED, FB2B, 66MHZ) */
0x00, 0x00, 0x00, 0x06, /* Class: 0x06000000 host bridge */
0x00, /* Cacheline: 0x00 */
0x40, /* Latency: 0x40 */
0x00, /* Header-Type: 0x00 normal */
};
*value = 0;
if (where >= 0 && where < sizeof(fake_pci_config) &&
(where + size) >= 0 &&
(where + size) < sizeof(fake_pci_config) &&
size <= sizeof(u32)) {
while (size--) {
*value <<= 8;
*value |= fake_pci_config[where + size];
}
}
return PCIBIOS_SUCCESSFUL;
}
int pci_host_bridge_write_pci_cfg(struct pci_bus *bus_dev,
unsigned int devfn,
int where, int size,
u32 value)
{
return PCIBIOS_SUCCESSFUL;
}
struct pci_bus * __init pci_scan_one_pbm(struct pci_pbm_info *pbm)
{
struct pci_controller_info *p = pbm->parent;
struct device_node *node = pbm->prom_node;
struct pci_dev *host_pdev;
struct pci_bus *bus;
printk("PCI: Scanning PBM %s\n", node->full_name);
@ -698,6 +753,10 @@ struct pci_bus * __init pci_scan_one_pbm(struct pci_pbm_info *pbm)
bus->resource[0] = &pbm->io_space;
bus->resource[1] = &pbm->mem_space;
/* Create the dummy host bridge and link it in. */
host_pdev = of_create_pci_dev(pbm, node, bus, 0x00, 1);
bus->self = host_pdev;
pci_of_scan_bus(pbm, node, bus);
pci_bus_add_devices(bus);
pci_bus_register_of_sysfs(bus);

9
arch/sparc64/kernel/pci_impl.h
View File

@ -20,6 +20,15 @@ extern int pci_num_controllers;
extern struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm);
extern void pci_determine_mem_io_space(struct pci_pbm_info *pbm);
extern int pci_host_bridge_read_pci_cfg(struct pci_bus *bus_dev,
unsigned int devfn,
int where, int size,
u32 *value);
extern int pci_host_bridge_write_pci_cfg(struct pci_bus *bus_dev,
unsigned int devfn,
int where, int size,
u32 value);
/* Error reporting support. */
extern void pci_scan_for_target_abort(struct pci_controller_info *, struct pci_pbm_info *, struct pci_bus *);
extern void pci_scan_for_master_abort(struct pci_controller_info *, struct pci_pbm_info *, struct pci_bus *);

7
arch/sparc64/kernel/pci_psycho.c
View File

@ -118,6 +118,10 @@ static int psycho_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
u16 tmp16;
u8 tmp8;
if (bus_dev == pbm->pci_bus && devfn == 0x00)
return pci_host_bridge_read_pci_cfg(bus_dev, devfn, where,
size, value);
switch (size) {
case 1:
*value = 0xff;
@ -171,6 +175,9 @@ static int psycho_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
unsigned char bus = bus_dev->number;
u32 *addr;
if (bus_dev == pbm->pci_bus && devfn == 0x00)
return pci_host_bridge_write_pci_cfg(bus_dev, devfn, where,
size, value);
addr = psycho_pci_config_mkaddr(pbm, bus, devfn, where);
if (!addr)
return PCIBIOS_SUCCESSFUL;

12
arch/sparc64/kernel/pci_sabre.c
View File

@ -319,6 +319,12 @@ static int __sabre_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
static int sabre_read_pci_cfg(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *value)
{
struct pci_pbm_info *pbm = bus->sysdata;
if (bus == pbm->pci_bus && devfn == 0x00)
return pci_host_bridge_read_pci_cfg(bus, devfn, where,
size, value);
if (!bus->number && sabre_out_of_range(devfn)) {
switch (size) {
case 1:
@ -435,6 +441,12 @@ static int __sabre_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
static int sabre_write_pci_cfg(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 value)
{
struct pci_pbm_info *pbm = bus->sysdata;
if (bus == pbm->pci_bus && devfn == 0x00)
return pci_host_bridge_write_pci_cfg(bus, devfn, where,
size, value);
if (bus->number)
return __sabre_write_pci_cfg(bus, devfn, where, size, value);

6
arch/sparc64/kernel/pci_schizo.c
View File

@ -125,6 +125,9 @@ static int schizo_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
u16 tmp16;
u8 tmp8;
if (bus_dev == pbm->pci_bus && devfn == 0x00)
return pci_host_bridge_read_pci_cfg(bus_dev, devfn, where,
size, value);
switch (size) {
case 1:
*value = 0xff;
@ -178,6 +181,9 @@ static int schizo_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
unsigned char bus = bus_dev->number;
u32 *addr;
if (bus_dev == pbm->pci_bus && devfn == 0x00)
return pci_host_bridge_write_pci_cfg(bus_dev, devfn, where,
size, value);
addr = schizo_pci_config_mkaddr(pbm, bus, devfn, where);
if (!addr)
return PCIBIOS_SUCCESSFUL;

6
arch/sparc64/kernel/pci_sun4v.c
View File

@ -612,6 +612,9 @@ static int pci_sun4v_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
unsigned int func = PCI_FUNC(devfn);
unsigned long ret;
if (bus_dev == pbm->pci_bus && devfn == 0x00)
return pci_host_bridge_read_pci_cfg(bus_dev, devfn, where,
size, value);
if (pci_sun4v_out_of_range(pbm, bus, device, func)) {
ret = ~0UL;
} else {
@ -650,6 +653,9 @@ static int pci_sun4v_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn,
unsigned int func = PCI_FUNC(devfn);
unsigned long ret;
if (bus_dev == pbm->pci_bus && devfn == 0x00)
return pci_host_bridge_write_pci_cfg(bus_dev, devfn, where,
size, value);
if (pci_sun4v_out_of_range(pbm, bus, device, func)) {
/* Do nothing. */
} else {