513 lines
14 KiB
C
513 lines
14 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#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 <linux/pci-acpi.h>
|
|
#include <asm/numa.h>
|
|
#include <asm/pci_x86.h>
|
|
|
|
struct pci_root_info {
|
|
struct acpi_pci_root_info common;
|
|
struct pci_sysdata sd;
|
|
#ifdef CONFIG_PCI_MMCONFIG
|
|
bool mcfg_added;
|
|
u8 start_bus;
|
|
u8 end_bus;
|
|
#endif
|
|
};
|
|
|
|
bool pci_use_e820 = true;
|
|
static bool pci_use_crs = true;
|
|
static bool pci_ignore_seg;
|
|
|
|
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 int __init set_no_e820(const struct dmi_system_id *id)
|
|
{
|
|
printk(KERN_INFO "PCI: %s detected: not clipping E820 regions from _CRS\n",
|
|
id->ident);
|
|
pci_use_e820 = false;
|
|
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"),
|
|
},
|
|
},
|
|
/* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/931368 */
|
|
/* https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1033299 */
|
|
{
|
|
.callback = set_use_crs,
|
|
.ident = "Foxconn K8M890-8237A",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_VENDOR, "Foxconn"),
|
|
DMI_MATCH(DMI_BOARD_NAME, "K8M890-8237A"),
|
|
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=42606 */
|
|
{
|
|
.callback = set_nouse_crs,
|
|
.ident = "Supermicro X8DTH",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "X8DTH-i/6/iF/6F"),
|
|
DMI_MATCH(DMI_BIOS_VERSION, "2.0a"),
|
|
},
|
|
},
|
|
|
|
/* 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"),
|
|
},
|
|
},
|
|
|
|
/*
|
|
* Many Lenovo models with "IIL" in their DMI_PRODUCT_VERSION have
|
|
* an E820 reserved region that covers the entire 32-bit host
|
|
* bridge memory window from _CRS. Using the E820 region to clip
|
|
* _CRS means no space is available for hot-added or uninitialized
|
|
* PCI devices. This typically breaks I2C controllers for touchpads
|
|
* and hot-added Thunderbolt devices. See the commit log for
|
|
* models known to require this quirk and related bug reports.
|
|
*/
|
|
{
|
|
.callback = set_no_e820,
|
|
.ident = "Lenovo *IIL* product version",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
|
|
DMI_MATCH(DMI_PRODUCT_VERSION, "IIL"),
|
|
},
|
|
},
|
|
|
|
/*
|
|
* The Acer Spin 5 (SP513-54N) has the same E820 reservation covering
|
|
* the entire _CRS 32-bit window issue as the Lenovo *IIL* models.
|
|
* See https://bugs.launchpad.net/bugs/1884232
|
|
*/
|
|
{
|
|
.callback = set_no_e820,
|
|
.ident = "Acer Spin 5 (SP513-54N)",
|
|
.matches = {
|
|
DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
|
|
DMI_MATCH(DMI_PRODUCT_NAME, "Spin SP513-54N"),
|
|
},
|
|
},
|
|
|
|
/*
|
|
* Clevo X170KM-G barebones have the same E820 reservation covering
|
|
* the entire _CRS 32-bit window issue as the Lenovo *IIL* models.
|
|
* See https://bugzilla.kernel.org/show_bug.cgi?id=214259
|
|
*/
|
|
{
|
|
.callback = set_no_e820,
|
|
.ident = "Clevo X170KM-G Barebone",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BOARD_NAME, "X170KM-G"),
|
|
},
|
|
},
|
|
{}
|
|
};
|
|
|
|
void __init pci_acpi_crs_quirks(void)
|
|
{
|
|
int year = dmi_get_bios_year();
|
|
|
|
if (year >= 0 && year < 2008 && iomem_resource.end <= 0xffffffff)
|
|
pci_use_crs = false;
|
|
|
|
/*
|
|
* Some firmware includes unusable space (host bridge registers,
|
|
* hidden PCI device BARs, etc) in PCI host bridge _CRS. This is a
|
|
* firmware defect, and 4dc2287c1805 ("x86: avoid E820 regions when
|
|
* allocating address space") has clipped out the unusable space in
|
|
* the past.
|
|
*
|
|
* But other firmware supplies E820 reserved regions that cover
|
|
* entire _CRS windows, so clipping throws away the entire window,
|
|
* leaving none for hot-added or uninitialized devices. These E820
|
|
* entries are probably *not* a firmware defect, so disable the
|
|
* clipping by default for post-2022 machines.
|
|
*
|
|
* We already have quirks to disable clipping for pre-2023
|
|
* machines, and we'll likely need quirks to *enable* clipping for
|
|
* post-2022 machines that incorrectly include unusable space in
|
|
* _CRS.
|
|
*/
|
|
if (year >= 2023)
|
|
pci_use_e820 = 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");
|
|
|
|
/* "pci=use_e820"/"pci=no_e820" on the kernel cmdline takes precedence */
|
|
if (pci_probe & PCI_NO_E820)
|
|
pci_use_e820 = false;
|
|
else if (pci_probe & PCI_USE_E820)
|
|
pci_use_e820 = true;
|
|
|
|
printk(KERN_INFO "PCI: %s E820 reservations for host bridge windows\n",
|
|
pci_use_e820 ? "Using" : "Ignoring");
|
|
if (pci_probe & (PCI_NO_E820 | PCI_USE_E820))
|
|
printk(KERN_INFO "PCI: Please notify linux-pci@vger.kernel.org so future kernels can this automatically\n");
|
|
}
|
|
|
|
#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 acpi_pci_root_info *ci)
|
|
{
|
|
int result, seg;
|
|
struct pci_root_info *info;
|
|
struct acpi_pci_root *root = ci->root;
|
|
struct device *dev = &ci->bridge->dev;
|
|
|
|
info = container_of(ci, struct pci_root_info, common);
|
|
info->start_bus = (u8)root->secondary.start;
|
|
info->end_bus = (u8)root->secondary.end;
|
|
info->mcfg_added = false;
|
|
seg = info->sd.domain;
|
|
|
|
/* 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, info->start_bus, info->end_bus,
|
|
root->mcfg_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 acpi_pci_root_info *ci)
|
|
{
|
|
struct pci_root_info *info;
|
|
|
|
info = container_of(ci, struct pci_root_info, common);
|
|
if (info->mcfg_added) {
|
|
pci_mmconfig_delete(info->sd.domain,
|
|
info->start_bus, info->end_bus);
|
|
info->mcfg_added = false;
|
|
}
|
|
}
|
|
#else
|
|
static int setup_mcfg_map(struct acpi_pci_root_info *ci)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void teardown_mcfg_map(struct acpi_pci_root_info *ci)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static int pci_acpi_root_get_node(struct acpi_pci_root *root)
|
|
{
|
|
int busnum = root->secondary.start;
|
|
struct acpi_device *device = root->device;
|
|
int node = acpi_get_node(device->handle);
|
|
|
|
if (node == NUMA_NO_NODE) {
|
|
node = x86_pci_root_bus_node(busnum);
|
|
if (node != 0 && node != NUMA_NO_NODE)
|
|
dev_info(&device->dev, FW_BUG "no _PXM; falling back to node %d from hardware (may be inconsistent with ACPI node numbers)\n",
|
|
node);
|
|
}
|
|
if (node != NUMA_NO_NODE && !node_online(node))
|
|
node = NUMA_NO_NODE;
|
|
|
|
return node;
|
|
}
|
|
|
|
static int pci_acpi_root_init_info(struct acpi_pci_root_info *ci)
|
|
{
|
|
return setup_mcfg_map(ci);
|
|
}
|
|
|
|
static void pci_acpi_root_release_info(struct acpi_pci_root_info *ci)
|
|
{
|
|
teardown_mcfg_map(ci);
|
|
kfree(container_of(ci, struct pci_root_info, common));
|
|
}
|
|
|
|
/*
|
|
* An IO port or MMIO resource assigned to a PCI host bridge may be
|
|
* consumed by the host bridge itself or available to its child
|
|
* bus/devices. The ACPI specification defines a bit (Producer/Consumer)
|
|
* to tell whether the resource is consumed by the host bridge itself,
|
|
* but firmware hasn't used that bit consistently, so we can't rely on it.
|
|
*
|
|
* On x86 and IA64 platforms, all IO port and MMIO resources are assumed
|
|
* to be available to child bus/devices except one special case:
|
|
* IO port [0xCF8-0xCFF] is consumed by the host bridge itself
|
|
* to access PCI configuration space.
|
|
*
|
|
* So explicitly filter out PCI CFG IO ports[0xCF8-0xCFF].
|
|
*/
|
|
static bool resource_is_pcicfg_ioport(struct resource *res)
|
|
{
|
|
return (res->flags & IORESOURCE_IO) &&
|
|
res->start == 0xCF8 && res->end == 0xCFF;
|
|
}
|
|
|
|
static int pci_acpi_root_prepare_resources(struct acpi_pci_root_info *ci)
|
|
{
|
|
struct acpi_device *device = ci->bridge;
|
|
int busnum = ci->root->secondary.start;
|
|
struct resource_entry *entry, *tmp;
|
|
int status;
|
|
|
|
status = acpi_pci_probe_root_resources(ci);
|
|
|
|
if (pci_use_crs) {
|
|
resource_list_for_each_entry_safe(entry, tmp, &ci->resources)
|
|
if (resource_is_pcicfg_ioport(entry->res))
|
|
resource_list_destroy_entry(entry);
|
|
return status;
|
|
}
|
|
|
|
resource_list_for_each_entry_safe(entry, tmp, &ci->resources) {
|
|
dev_printk(KERN_DEBUG, &device->dev,
|
|
"host bridge window %pR (ignored)\n", entry->res);
|
|
resource_list_destroy_entry(entry);
|
|
}
|
|
x86_pci_root_bus_resources(busnum, &ci->resources);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct acpi_pci_root_ops acpi_pci_root_ops = {
|
|
.pci_ops = &pci_root_ops,
|
|
.init_info = pci_acpi_root_init_info,
|
|
.release_info = pci_acpi_root_release_info,
|
|
.prepare_resources = pci_acpi_root_prepare_resources,
|
|
};
|
|
|
|
struct pci_bus *pci_acpi_scan_root(struct acpi_pci_root *root)
|
|
{
|
|
int domain = root->segment;
|
|
int busnum = root->secondary.start;
|
|
int node = pci_acpi_root_get_node(root);
|
|
struct pci_bus *bus;
|
|
|
|
if (pci_ignore_seg)
|
|
root->segment = domain = 0;
|
|
|
|
if (domain && !pci_domains_supported) {
|
|
printk(KERN_WARNING "pci_bus %04x:%02x: "
|
|
"ignored (multiple domains not supported)\n",
|
|
domain, busnum);
|
|
return NULL;
|
|
}
|
|
|
|
bus = pci_find_bus(domain, busnum);
|
|
if (bus) {
|
|
/*
|
|
* If the desired bus has been scanned already, replace
|
|
* its bus->sysdata.
|
|
*/
|
|
struct pci_sysdata sd = {
|
|
.domain = domain,
|
|
.node = node,
|
|
.companion = root->device
|
|
};
|
|
|
|
memcpy(bus->sysdata, &sd, sizeof(sd));
|
|
} else {
|
|
struct pci_root_info *info;
|
|
|
|
info = kzalloc(sizeof(*info), GFP_KERNEL);
|
|
if (!info)
|
|
dev_err(&root->device->dev,
|
|
"pci_bus %04x:%02x: ignored (out of memory)\n",
|
|
domain, busnum);
|
|
else {
|
|
info->sd.domain = domain;
|
|
info->sd.node = node;
|
|
info->sd.companion = root->device;
|
|
bus = acpi_pci_root_create(root, &acpi_pci_root_ops,
|
|
&info->common, &info->sd);
|
|
}
|
|
}
|
|
|
|
/* 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)
|
|
pcie_bus_configure_settings(child);
|
|
}
|
|
|
|
return bus;
|
|
}
|
|
|
|
int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge)
|
|
{
|
|
/*
|
|
* We pass NULL as parent to pci_create_root_bus(), so if it is not NULL
|
|
* here, pci_create_root_bus() has been called by someone else and
|
|
* sysdata is likely to be different from what we expect. Let it go in
|
|
* that case.
|
|
*/
|
|
if (!bridge->dev.parent) {
|
|
struct pci_sysdata *sd = bridge->bus->sysdata;
|
|
ACPI_COMPANION_SET(&bridge->dev, sd->companion);
|
|
}
|
|
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;
|
|
}
|