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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-25 21:54:06 +08:00
linux-next/arch/x86/pci/acpi.c
Linus Torvalds 556f12f602 PCI changes for the v3.9 merge window:
Host bridge hotplug
     - Major overhaul of ACPI host bridge add/start (Rafael Wysocki, Yinghai Lu)
     - Major overhaul of PCI/ACPI binding (Rafael Wysocki, Yinghai Lu)
     - Split out ACPI host bridge and ACPI PCI device hotplug (Yinghai Lu)
     - Stop caching _PRT and make independent of bus numbers (Yinghai Lu)
 
   PCI device hotplug
     - Clean up cpqphp dead code (Sasha Levin)
     - Disable ARI unless device and upstream bridge support it (Yijing Wang)
     - Initialize all hot-added devices (not functions 0-7) (Yijing Wang)
 
   Power management
     - Don't touch ASPM if disabled (Joe Lawrence)
     - Fix ASPM link state management (Myron Stowe)
 
   Miscellaneous
     - Fix PCI_EXP_FLAGS accessor (Alex Williamson)
     - Disable Bus Master in pci_device_shutdown (Konstantin Khlebnikov)
     - Document hotplug resource and MPS parameters (Yijing Wang)
     - Add accessor for PCIe capabilities (Myron Stowe)
     - Drop pciehp suspend/resume messages (Paul Bolle)
     - Make pci_slot built-in only (not a module) (Jiang Liu)
     - Remove unused PCI/ACPI bind ops (Jiang Liu)
     - Removed used pci_root_bus (Bjorn Helgaas)
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Merge tag 'pci-v3.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci

Pull PCI changes from Bjorn Helgaas:
 "Host bridge hotplug
    - Major overhaul of ACPI host bridge add/start (Rafael Wysocki, Yinghai Lu)
    - Major overhaul of PCI/ACPI binding (Rafael Wysocki, Yinghai Lu)
    - Split out ACPI host bridge and ACPI PCI device hotplug (Yinghai Lu)
    - Stop caching _PRT and make independent of bus numbers (Yinghai Lu)

  PCI device hotplug
    - Clean up cpqphp dead code (Sasha Levin)
    - Disable ARI unless device and upstream bridge support it (Yijing Wang)
    - Initialize all hot-added devices (not functions 0-7) (Yijing Wang)

  Power management
    - Don't touch ASPM if disabled (Joe Lawrence)
    - Fix ASPM link state management (Myron Stowe)

  Miscellaneous
    - Fix PCI_EXP_FLAGS accessor (Alex Williamson)
    - Disable Bus Master in pci_device_shutdown (Konstantin Khlebnikov)
    - Document hotplug resource and MPS parameters (Yijing Wang)
    - Add accessor for PCIe capabilities (Myron Stowe)
    - Drop pciehp suspend/resume messages (Paul Bolle)
    - Make pci_slot built-in only (not a module) (Jiang Liu)
    - Remove unused PCI/ACPI bind ops (Jiang Liu)
    - Removed used pci_root_bus (Bjorn Helgaas)"

* tag 'pci-v3.9-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (51 commits)
  PCI/ACPI: Don't cache _PRT, and don't associate them with bus numbers
  PCI: Fix PCI Express Capability accessors for PCI_EXP_FLAGS
  ACPI / PCI: Make pci_slot built-in only, not a module
  PCI/PM: Clear state_saved during suspend
  PCI: Use atomic_inc_return() rather than atomic_add_return()
  PCI: Catch attempts to disable already-disabled devices
  PCI: Disable Bus Master unconditionally in pci_device_shutdown()
  PCI: acpiphp: Remove dead code for PCI host bridge hotplug
  PCI: acpiphp: Create companion ACPI devices before creating PCI devices
  PCI: Remove unused "rc" in virtfn_add_bus()
  PCI: pciehp: Drop suspend/resume ENTRY messages
  PCI/ASPM: Don't touch ASPM if forcibly disabled
  PCI/ASPM: Deallocate upstream link state even if device is not PCIe
  PCI: Document MPS parameters pci=pcie_bus_safe, pci=pcie_bus_perf, etc
  PCI: Document hpiosize= and hpmemsize= resource reservation parameters
  PCI: Use PCI Express Capability accessor
  PCI: Introduce accessor to retrieve PCIe Capabilities Register
  PCI: Put pci_dev in device tree as early as possible
  PCI: Skip attaching driver in device_add()
  PCI: acpiphp: Keep driver loaded even if no slots found
  ...
2013-02-25 21:18:18 -08:00

630 lines
15 KiB
C

#include <linux/pci.h>
#include <linux/acpi.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/dmi.h>
#include <linux/slab.h>
#include <asm/numa.h>
#include <asm/pci_x86.h>
struct pci_root_info {
struct acpi_device *bridge;
char name[16];
unsigned int res_num;
struct resource *res;
resource_size_t *res_offset;
struct pci_sysdata sd;
#ifdef CONFIG_PCI_MMCONFIG
bool mcfg_added;
u16 segment;
u8 start_bus;
u8 end_bus;
#endif
};
static bool pci_use_crs = true;
static bool pci_ignore_seg = false;
static int __init set_use_crs(const struct dmi_system_id *id)
{
pci_use_crs = true;
return 0;
}
static int __init set_nouse_crs(const struct dmi_system_id *id)
{
pci_use_crs = false;
return 0;
}
static int __init set_ignore_seg(const struct dmi_system_id *id)
{
printk(KERN_INFO "PCI: %s detected: ignoring ACPI _SEG\n", id->ident);
pci_ignore_seg = true;
return 0;
}
static const struct dmi_system_id pci_crs_quirks[] __initconst = {
/* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
{
.callback = set_use_crs,
.ident = "IBM System x3800",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
},
},
/* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */
/* 2006 AMD HT/VIA system with two host bridges */
{
.callback = set_use_crs,
.ident = "ASRock ALiveSATA2-GLAN",
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
},
},
/* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */
/* 2006 AMD HT/VIA system with two host bridges */
{
.callback = set_use_crs,
.ident = "ASUS M2V-MX SE",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
},
},
/* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */
{
.callback = set_use_crs,
.ident = "MSI MS-7253",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
},
},
/* Now for the blacklist.. */
/* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
{
.callback = set_nouse_crs,
.ident = "Dell Studio 1557",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."),
DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"),
DMI_MATCH(DMI_BIOS_VERSION, "A09"),
},
},
/* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
{
.callback = set_nouse_crs,
.ident = "Thinkpad SL510",
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
DMI_MATCH(DMI_BOARD_NAME, "2847DFG"),
DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"),
},
},
/* https://bugzilla.kernel.org/show_bug.cgi?id=15362 */
{
.callback = set_ignore_seg,
.ident = "HP xw9300",
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
DMI_MATCH(DMI_PRODUCT_NAME, "HP xw9300 Workstation"),
},
},
{}
};
void __init pci_acpi_crs_quirks(void)
{
int year;
if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008)
pci_use_crs = false;
dmi_check_system(pci_crs_quirks);
/*
* If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
* takes precedence over anything we figured out above.
*/
if (pci_probe & PCI_ROOT_NO_CRS)
pci_use_crs = false;
else if (pci_probe & PCI_USE__CRS)
pci_use_crs = true;
printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
"if necessary, use \"pci=%s\" and report a bug\n",
pci_use_crs ? "Using" : "Ignoring",
pci_use_crs ? "nocrs" : "use_crs");
}
#ifdef CONFIG_PCI_MMCONFIG
static int check_segment(u16 seg, struct device *dev, char *estr)
{
if (seg) {
dev_err(dev,
"%s can't access PCI configuration "
"space under this host bridge.\n",
estr);
return -EIO;
}
/*
* Failure in adding MMCFG information is not fatal,
* just can't access extended configuration space of
* devices under this host bridge.
*/
dev_warn(dev,
"%s can't access extended PCI configuration "
"space under this bridge.\n",
estr);
return 0;
}
static int setup_mcfg_map(struct pci_root_info *info, u16 seg, u8 start,
u8 end, phys_addr_t addr)
{
int result;
struct device *dev = &info->bridge->dev;
info->start_bus = start;
info->end_bus = end;
info->mcfg_added = false;
/* return success if MMCFG is not in use */
if (raw_pci_ext_ops && raw_pci_ext_ops != &pci_mmcfg)
return 0;
if (!(pci_probe & PCI_PROBE_MMCONF))
return check_segment(seg, dev, "MMCONFIG is disabled,");
result = pci_mmconfig_insert(dev, seg, start, end, addr);
if (result == 0) {
/* enable MMCFG if it hasn't been enabled yet */
if (raw_pci_ext_ops == NULL)
raw_pci_ext_ops = &pci_mmcfg;
info->mcfg_added = true;
} else if (result != -EEXIST)
return check_segment(seg, dev,
"fail to add MMCONFIG information,");
return 0;
}
static void teardown_mcfg_map(struct pci_root_info *info)
{
if (info->mcfg_added) {
pci_mmconfig_delete(info->segment, info->start_bus,
info->end_bus);
info->mcfg_added = false;
}
}
#else
static int setup_mcfg_map(struct pci_root_info *info,
u16 seg, u8 start, u8 end,
phys_addr_t addr)
{
return 0;
}
static void teardown_mcfg_map(struct pci_root_info *info)
{
}
#endif
static acpi_status
resource_to_addr(struct acpi_resource *resource,
struct acpi_resource_address64 *addr)
{
acpi_status status;
struct acpi_resource_memory24 *memory24;
struct acpi_resource_memory32 *memory32;
struct acpi_resource_fixed_memory32 *fixed_memory32;
memset(addr, 0, sizeof(*addr));
switch (resource->type) {
case ACPI_RESOURCE_TYPE_MEMORY24:
memory24 = &resource->data.memory24;
addr->resource_type = ACPI_MEMORY_RANGE;
addr->minimum = memory24->minimum;
addr->address_length = memory24->address_length;
addr->maximum = addr->minimum + addr->address_length - 1;
return AE_OK;
case ACPI_RESOURCE_TYPE_MEMORY32:
memory32 = &resource->data.memory32;
addr->resource_type = ACPI_MEMORY_RANGE;
addr->minimum = memory32->minimum;
addr->address_length = memory32->address_length;
addr->maximum = addr->minimum + addr->address_length - 1;
return AE_OK;
case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
fixed_memory32 = &resource->data.fixed_memory32;
addr->resource_type = ACPI_MEMORY_RANGE;
addr->minimum = fixed_memory32->address;
addr->address_length = fixed_memory32->address_length;
addr->maximum = addr->minimum + addr->address_length - 1;
return AE_OK;
case ACPI_RESOURCE_TYPE_ADDRESS16:
case ACPI_RESOURCE_TYPE_ADDRESS32:
case ACPI_RESOURCE_TYPE_ADDRESS64:
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) {
return AE_OK;
}
break;
}
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;
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;
u64 start, orig_end, end;
status = resource_to_addr(acpi_res, &addr);
if (!ACPI_SUCCESS(status))
return AE_OK;
if (addr.resource_type == ACPI_MEMORY_RANGE) {
flags = IORESOURCE_MEM;
if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
flags |= IORESOURCE_PREFETCH;
} else if (addr.resource_type == ACPI_IO_RANGE) {
flags = IORESOURCE_IO;
} else
return AE_OK;
start = addr.minimum + addr.translation_offset;
orig_end = end = addr.maximum + addr.translation_offset;
/* Exclude non-addressable range or non-addressable portion of range */
end = min(end, (u64)iomem_resource.end);
if (end <= start) {
dev_info(&info->bridge->dev,
"host bridge window [%#llx-%#llx] "
"(ignored, not CPU addressable)\n", start, orig_end);
return AE_OK;
} else if (orig_end != end) {
dev_info(&info->bridge->dev,
"host bridge window [%#llx-%#llx] "
"([%#llx-%#llx] ignored, not CPU addressable)\n",
start, orig_end, end + 1, orig_end);
}
res = &info->res[info->res_num];
res->name = info->name;
res->flags = flags;
res->start = start;
res->end = end;
info->res_offset[info->res_num] = addr.translation_offset;
if (!pci_use_crs) {
dev_printk(KERN_DEBUG, &info->bridge->dev,
"host bridge window %pR (ignored)\n", res);
return AE_OK;
}
info->res_num++;
return AE_OK;
}
static void coalesce_windows(struct pci_root_info *info, unsigned long type)
{
int i, j;
struct resource *res1, *res2;
for (i = 0; i < info->res_num; i++) {
res1 = &info->res[i];
if (!(res1->flags & type))
continue;
for (j = i + 1; j < info->res_num; j++) {
res2 = &info->res[j];
if (!(res2->flags & type))
continue;
/*
* I don't like throwing away windows because then
* our resources no longer match the ACPI _CRS, but
* the kernel resource tree doesn't allow overlaps.
*/
if (resource_overlaps(res1, res2)) {
res1->start = min(res1->start, res2->start);
res1->end = max(res1->end, res2->end);
dev_info(&info->bridge->dev,
"host bridge window expanded to %pR; %pR ignored\n",
res1, res2);
res2->flags = 0;
}
}
}
}
static void add_resources(struct pci_root_info *info,
struct list_head *resources)
{
int i;
struct resource *res, *root, *conflict;
coalesce_windows(info, IORESOURCE_MEM);
coalesce_windows(info, IORESOURCE_IO);
for (i = 0; i < info->res_num; i++) {
res = &info->res[i];
if (res->flags & IORESOURCE_MEM)
root = &iomem_resource;
else if (res->flags & IORESOURCE_IO)
root = &ioport_resource;
else
continue;
conflict = insert_resource_conflict(root, res);
if (conflict)
dev_info(&info->bridge->dev,
"ignoring host bridge window %pR (conflicts with %s %pR)\n",
res, conflict->name, conflict);
else
pci_add_resource_offset(resources, res,
info->res_offset[i]);
}
}
static void free_pci_root_info_res(struct pci_root_info *info)
{
kfree(info->res);
info->res = NULL;
kfree(info->res_offset);
info->res_offset = NULL;
info->res_num = 0;
}
static void __release_pci_root_info(struct pci_root_info *info)
{
int i;
struct resource *res;
for (i = 0; i < info->res_num; i++) {
res = &info->res[i];
if (!res->parent)
continue;
if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
continue;
release_resource(res);
}
free_pci_root_info_res(info);
teardown_mcfg_map(info);
kfree(info);
}
static void release_pci_root_info(struct pci_host_bridge *bridge)
{
struct pci_root_info *info = bridge->release_data;
__release_pci_root_info(info);
}
static void
probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
int busnum, int domain)
{
size_t size;
sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
info->bridge = device;
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 = kzalloc(size, GFP_KERNEL);
if (!info->res) {
info->res_num = 0;
return;
}
size = sizeof(*info->res_offset) * info->res_num;
info->res_num = 0;
info->res_offset = kzalloc(size, GFP_KERNEL);
if (!info->res_offset) {
kfree(info->res);
info->res = NULL;
return;
}
acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
info);
}
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
{
struct acpi_device *device = root->device;
struct pci_root_info *info = NULL;
int domain = root->segment;
int busnum = root->secondary.start;
LIST_HEAD(resources);
struct pci_bus *bus = NULL;
struct pci_sysdata *sd;
int node;
#ifdef CONFIG_ACPI_NUMA
int pxm;
#endif
if (pci_ignore_seg)
domain = 0;
if (domain && !pci_domains_supported) {
printk(KERN_WARNING "pci_bus %04x:%02x: "
"ignored (multiple domains not supported)\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;
info = kzalloc(sizeof(*info), GFP_KERNEL);
if (!info) {
printk(KERN_WARNING "pci_bus %04x:%02x: "
"ignored (out of memory)\n", domain, busnum);
return NULL;
}
sd = &info->sd;
sd->domain = domain;
sd->node = node;
sd->acpi = device->handle;
/*
* 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(info);
} else {
probe_pci_root_info(info, device, busnum, domain);
/* insert busn res at first */
pci_add_resource(&resources, &root->secondary);
/*
* _CRS with no apertures is normal, so only fall back to
* defaults or native bridge info if we're ignoring _CRS.
*/
if (pci_use_crs)
add_resources(info, &resources);
else {
free_pci_root_info_res(info);
x86_pci_root_bus_resources(busnum, &resources);
}
if (!setup_mcfg_map(info, domain, (u8)root->secondary.start,
(u8)root->secondary.end, root->mcfg_addr))
bus = pci_create_root_bus(NULL, busnum, &pci_root_ops,
sd, &resources);
if (bus) {
pci_scan_child_bus(bus);
pci_set_host_bridge_release(
to_pci_host_bridge(bus->bridge),
release_pci_root_info, info);
} else {
pci_free_resource_list(&resources);
__release_pci_root_info(info);
}
}
/* After the PCI-E bus has been walked and all devices discovered,
* configure any settings of the fabric that might be necessary.
*/
if (bus) {
struct pci_bus *child;
list_for_each_entry(child, &bus->children, node) {
struct pci_dev *self = child->self;
if (!self)
continue;
pcie_bus_configure_settings(child, self->pcie_mpss);
}
}
if (bus && node != -1) {
#ifdef CONFIG_ACPI_NUMA
if (pxm >= 0)
dev_printk(KERN_DEBUG, &bus->dev,
"on NUMA node %d (pxm %d)\n", node, pxm);
#else
dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
#endif
}
return bus;
}
int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
{
struct pci_sysdata *sd = bridge->bus->sysdata;
ACPI_HANDLE_SET(&bridge->dev, sd->acpi);
return 0;
}
int __init pci_acpi_init(void)
{
struct pci_dev *dev = NULL;
if (acpi_noirq)
return -ENODEV;
printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
acpi_irq_penalty_init();
pcibios_enable_irq = acpi_pci_irq_enable;
pcibios_disable_irq = acpi_pci_irq_disable;
x86_init.pci.init_irq = x86_init_noop;
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);
}
return 0;
}