mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 14:16:39 +07:00
58b6e55384
This reverts commit 809d9a8f93
.
This one isn't quite ready for prime time. It needs more testing and
additional feedback from the ACPI guys.
260 lines
5.8 KiB
C
260 lines
5.8 KiB
C
#include <linux/pci.h>
|
|
#include <linux/acpi.h>
|
|
#include <linux/init.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/dmi.h>
|
|
#include <asm/numa.h>
|
|
#include "pci.h"
|
|
|
|
struct pci_root_info {
|
|
char *name;
|
|
unsigned int res_num;
|
|
struct resource *res;
|
|
struct pci_bus *bus;
|
|
int busnum;
|
|
};
|
|
|
|
static acpi_status
|
|
resource_to_addr(struct acpi_resource *resource,
|
|
struct acpi_resource_address64 *addr)
|
|
{
|
|
acpi_status status;
|
|
|
|
status = acpi_resource_to_address64(resource, addr);
|
|
if (ACPI_SUCCESS(status) &&
|
|
(addr->resource_type == ACPI_MEMORY_RANGE ||
|
|
addr->resource_type == ACPI_IO_RANGE) &&
|
|
addr->address_length > 0 &&
|
|
addr->producer_consumer == ACPI_PRODUCER) {
|
|
return AE_OK;
|
|
}
|
|
return AE_ERROR;
|
|
}
|
|
|
|
static acpi_status
|
|
count_resource(struct acpi_resource *acpi_res, void *data)
|
|
{
|
|
struct pci_root_info *info = data;
|
|
struct acpi_resource_address64 addr;
|
|
acpi_status status;
|
|
|
|
if (info->res_num >= PCI_BUS_NUM_RESOURCES)
|
|
return AE_OK;
|
|
|
|
status = resource_to_addr(acpi_res, &addr);
|
|
if (ACPI_SUCCESS(status))
|
|
info->res_num++;
|
|
return AE_OK;
|
|
}
|
|
|
|
static acpi_status
|
|
setup_resource(struct acpi_resource *acpi_res, void *data)
|
|
{
|
|
struct pci_root_info *info = data;
|
|
struct resource *res;
|
|
struct acpi_resource_address64 addr;
|
|
acpi_status status;
|
|
unsigned long flags;
|
|
struct resource *root;
|
|
|
|
if (info->res_num >= PCI_BUS_NUM_RESOURCES)
|
|
return AE_OK;
|
|
|
|
status = resource_to_addr(acpi_res, &addr);
|
|
if (!ACPI_SUCCESS(status))
|
|
return AE_OK;
|
|
|
|
if (addr.resource_type == ACPI_MEMORY_RANGE) {
|
|
root = &iomem_resource;
|
|
flags = IORESOURCE_MEM;
|
|
if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
|
|
flags |= IORESOURCE_PREFETCH;
|
|
} else if (addr.resource_type == ACPI_IO_RANGE) {
|
|
root = &ioport_resource;
|
|
flags = IORESOURCE_IO;
|
|
} else
|
|
return AE_OK;
|
|
|
|
res = &info->res[info->res_num];
|
|
res->name = info->name;
|
|
res->flags = flags;
|
|
res->start = addr.minimum + addr.translation_offset;
|
|
res->end = res->start + addr.address_length - 1;
|
|
res->child = NULL;
|
|
|
|
if (insert_resource(root, res)) {
|
|
printk(KERN_ERR "PCI: Failed to allocate 0x%lx-0x%lx "
|
|
"from %s for %s\n", (unsigned long) res->start,
|
|
(unsigned long) res->end, root->name, info->name);
|
|
} else {
|
|
info->bus->resource[info->res_num] = res;
|
|
info->res_num++;
|
|
}
|
|
return AE_OK;
|
|
}
|
|
|
|
static void
|
|
adjust_transparent_bridge_resources(struct pci_bus *bus)
|
|
{
|
|
struct pci_dev *dev;
|
|
|
|
list_for_each_entry(dev, &bus->devices, bus_list) {
|
|
int i;
|
|
u16 class = dev->class >> 8;
|
|
|
|
if (class == PCI_CLASS_BRIDGE_PCI && dev->transparent) {
|
|
for(i = 3; i < PCI_BUS_NUM_RESOURCES; i++)
|
|
dev->subordinate->resource[i] =
|
|
dev->bus->resource[i - 3];
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
get_current_resources(struct acpi_device *device, int busnum,
|
|
int domain, struct pci_bus *bus)
|
|
{
|
|
struct pci_root_info info;
|
|
size_t size;
|
|
|
|
info.bus = bus;
|
|
info.res_num = 0;
|
|
acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
|
|
&info);
|
|
if (!info.res_num)
|
|
return;
|
|
|
|
size = sizeof(*info.res) * info.res_num;
|
|
info.res = kmalloc(size, GFP_KERNEL);
|
|
if (!info.res)
|
|
goto res_alloc_fail;
|
|
|
|
info.name = kmalloc(16, GFP_KERNEL);
|
|
if (!info.name)
|
|
goto name_alloc_fail;
|
|
sprintf(info.name, "PCI Bus %04x:%02x", domain, busnum);
|
|
|
|
info.res_num = 0;
|
|
acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
|
|
&info);
|
|
if (info.res_num)
|
|
adjust_transparent_bridge_resources(bus);
|
|
|
|
return;
|
|
|
|
name_alloc_fail:
|
|
kfree(info.res);
|
|
res_alloc_fail:
|
|
return;
|
|
}
|
|
|
|
struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_device *device, int domain, int busnum)
|
|
{
|
|
struct pci_bus *bus;
|
|
struct pci_sysdata *sd;
|
|
int node;
|
|
#ifdef CONFIG_ACPI_NUMA
|
|
int pxm;
|
|
#endif
|
|
|
|
if (domain && !pci_domains_supported) {
|
|
printk(KERN_WARNING "PCI: Multiple domains not supported "
|
|
"(dom %d, bus %d)\n", domain, busnum);
|
|
return NULL;
|
|
}
|
|
|
|
node = -1;
|
|
#ifdef CONFIG_ACPI_NUMA
|
|
pxm = acpi_get_pxm(device->handle);
|
|
if (pxm >= 0)
|
|
node = pxm_to_node(pxm);
|
|
if (node != -1)
|
|
set_mp_bus_to_node(busnum, node);
|
|
else
|
|
#endif
|
|
node = get_mp_bus_to_node(busnum);
|
|
|
|
if (node != -1 && !node_online(node))
|
|
node = -1;
|
|
|
|
/* Allocate per-root-bus (not per bus) arch-specific data.
|
|
* TODO: leak; this memory is never freed.
|
|
* It's arguable whether it's worth the trouble to care.
|
|
*/
|
|
sd = kzalloc(sizeof(*sd), GFP_KERNEL);
|
|
if (!sd) {
|
|
printk(KERN_ERR "PCI: OOM, not probing PCI bus %02x\n", busnum);
|
|
return NULL;
|
|
}
|
|
|
|
sd->domain = domain;
|
|
sd->node = node;
|
|
/*
|
|
* Maybe the desired pci bus has been already scanned. In such case
|
|
* it is unnecessary to scan the pci bus with the given domain,busnum.
|
|
*/
|
|
bus = pci_find_bus(domain, busnum);
|
|
if (bus) {
|
|
/*
|
|
* If the desired bus exits, the content of bus->sysdata will
|
|
* be replaced by sd.
|
|
*/
|
|
memcpy(bus->sysdata, sd, sizeof(*sd));
|
|
kfree(sd);
|
|
} else
|
|
bus = pci_scan_bus_parented(NULL, busnum, &pci_root_ops, sd);
|
|
|
|
if (!bus)
|
|
kfree(sd);
|
|
|
|
if (bus && node != -1) {
|
|
#ifdef CONFIG_ACPI_NUMA
|
|
if (pxm >= 0)
|
|
printk(KERN_DEBUG "bus %02x -> pxm %d -> node %d\n",
|
|
busnum, pxm, node);
|
|
#else
|
|
printk(KERN_DEBUG "bus %02x -> node %d\n",
|
|
busnum, node);
|
|
#endif
|
|
}
|
|
|
|
if (bus && (pci_probe & PCI_USE__CRS))
|
|
get_current_resources(device, busnum, domain, bus);
|
|
return bus;
|
|
}
|
|
|
|
int __init pci_acpi_init(void)
|
|
{
|
|
struct pci_dev *dev = NULL;
|
|
|
|
if (pcibios_scanned)
|
|
return 0;
|
|
|
|
if (acpi_noirq)
|
|
return 0;
|
|
|
|
printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
|
|
acpi_irq_penalty_init();
|
|
pcibios_scanned++;
|
|
pcibios_enable_irq = acpi_pci_irq_enable;
|
|
pcibios_disable_irq = acpi_pci_irq_disable;
|
|
|
|
if (pci_routeirq) {
|
|
/*
|
|
* PCI IRQ routing is set up by pci_enable_device(), but we
|
|
* also do it here in case there are still broken drivers that
|
|
* don't use pci_enable_device().
|
|
*/
|
|
printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
|
|
for_each_pci_dev(dev)
|
|
acpi_pci_irq_enable(dev);
|
|
}
|
|
|
|
#ifdef CONFIG_X86_IO_APIC
|
|
if (acpi_ioapic)
|
|
print_IO_APIC();
|
|
#endif
|
|
|
|
return 0;
|
|
}
|