forked from Minki/linux
b918c62e08
Replace the struct pci_bus secondary/subordinate members with the struct resource busn_res. Later we'll build a resource tree of these bus numbers. [bhelgaas: changelog] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
506 lines
12 KiB
C
506 lines
12 KiB
C
#include <linux/pci.h>
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#include <linux/acpi.h>
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#include <linux/init.h>
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#include <linux/irq.h>
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#include <linux/dmi.h>
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#include <linux/slab.h>
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#include <asm/numa.h>
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#include <asm/pci_x86.h>
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struct pci_root_info {
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struct acpi_device *bridge;
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char name[16];
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unsigned int res_num;
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struct resource *res;
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int busnum;
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struct pci_sysdata sd;
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};
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static bool pci_use_crs = true;
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static int __init set_use_crs(const struct dmi_system_id *id)
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{
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pci_use_crs = true;
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return 0;
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}
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static int __init set_nouse_crs(const struct dmi_system_id *id)
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{
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pci_use_crs = false;
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return 0;
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}
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static const struct dmi_system_id pci_use_crs_table[] __initconst = {
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/* http://bugzilla.kernel.org/show_bug.cgi?id=14183 */
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{
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.callback = set_use_crs,
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.ident = "IBM System x3800",
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "IBM"),
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DMI_MATCH(DMI_PRODUCT_NAME, "x3800"),
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},
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},
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/* https://bugzilla.kernel.org/show_bug.cgi?id=16007 */
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/* 2006 AMD HT/VIA system with two host bridges */
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{
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.callback = set_use_crs,
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.ident = "ASRock ALiveSATA2-GLAN",
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.matches = {
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DMI_MATCH(DMI_PRODUCT_NAME, "ALiveSATA2-GLAN"),
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},
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},
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/* https://bugzilla.kernel.org/show_bug.cgi?id=30552 */
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/* 2006 AMD HT/VIA system with two host bridges */
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{
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.callback = set_use_crs,
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.ident = "ASUS M2V-MX SE",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer INC."),
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DMI_MATCH(DMI_BOARD_NAME, "M2V-MX SE"),
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DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
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},
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},
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/* https://bugzilla.kernel.org/show_bug.cgi?id=42619 */
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{
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.callback = set_use_crs,
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.ident = "MSI MS-7253",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "MICRO-STAR INTERNATIONAL CO., LTD"),
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DMI_MATCH(DMI_BOARD_NAME, "MS-7253"),
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DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies, LTD"),
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},
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},
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/* Now for the blacklist.. */
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/* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
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{
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.callback = set_nouse_crs,
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.ident = "Dell Studio 1557",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "Dell Inc."),
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DMI_MATCH(DMI_PRODUCT_NAME, "Studio 1557"),
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DMI_MATCH(DMI_BIOS_VERSION, "A09"),
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},
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},
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/* https://bugzilla.redhat.com/show_bug.cgi?id=769657 */
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{
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.callback = set_nouse_crs,
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.ident = "Thinkpad SL510",
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.matches = {
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DMI_MATCH(DMI_BOARD_VENDOR, "LENOVO"),
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DMI_MATCH(DMI_BOARD_NAME, "2847DFG"),
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DMI_MATCH(DMI_BIOS_VERSION, "6JET85WW (1.43 )"),
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},
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},
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{}
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};
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void __init pci_acpi_crs_quirks(void)
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{
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int year;
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if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008)
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pci_use_crs = false;
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dmi_check_system(pci_use_crs_table);
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/*
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* If the user specifies "pci=use_crs" or "pci=nocrs" explicitly, that
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* takes precedence over anything we figured out above.
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*/
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if (pci_probe & PCI_ROOT_NO_CRS)
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pci_use_crs = false;
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else if (pci_probe & PCI_USE__CRS)
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pci_use_crs = true;
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printk(KERN_INFO "PCI: %s host bridge windows from ACPI; "
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"if necessary, use \"pci=%s\" and report a bug\n",
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pci_use_crs ? "Using" : "Ignoring",
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pci_use_crs ? "nocrs" : "use_crs");
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}
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static acpi_status
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resource_to_addr(struct acpi_resource *resource,
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struct acpi_resource_address64 *addr)
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{
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acpi_status status;
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struct acpi_resource_memory24 *memory24;
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struct acpi_resource_memory32 *memory32;
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struct acpi_resource_fixed_memory32 *fixed_memory32;
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memset(addr, 0, sizeof(*addr));
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switch (resource->type) {
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case ACPI_RESOURCE_TYPE_MEMORY24:
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memory24 = &resource->data.memory24;
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addr->resource_type = ACPI_MEMORY_RANGE;
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addr->minimum = memory24->minimum;
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addr->address_length = memory24->address_length;
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addr->maximum = addr->minimum + addr->address_length - 1;
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return AE_OK;
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case ACPI_RESOURCE_TYPE_MEMORY32:
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memory32 = &resource->data.memory32;
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addr->resource_type = ACPI_MEMORY_RANGE;
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addr->minimum = memory32->minimum;
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addr->address_length = memory32->address_length;
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addr->maximum = addr->minimum + addr->address_length - 1;
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return AE_OK;
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case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
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fixed_memory32 = &resource->data.fixed_memory32;
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addr->resource_type = ACPI_MEMORY_RANGE;
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addr->minimum = fixed_memory32->address;
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addr->address_length = fixed_memory32->address_length;
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addr->maximum = addr->minimum + addr->address_length - 1;
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return AE_OK;
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case ACPI_RESOURCE_TYPE_ADDRESS16:
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case ACPI_RESOURCE_TYPE_ADDRESS32:
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case ACPI_RESOURCE_TYPE_ADDRESS64:
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status = acpi_resource_to_address64(resource, addr);
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if (ACPI_SUCCESS(status) &&
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(addr->resource_type == ACPI_MEMORY_RANGE ||
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addr->resource_type == ACPI_IO_RANGE) &&
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addr->address_length > 0) {
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return AE_OK;
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}
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break;
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}
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return AE_ERROR;
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}
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static acpi_status
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count_resource(struct acpi_resource *acpi_res, void *data)
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{
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struct pci_root_info *info = data;
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struct acpi_resource_address64 addr;
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acpi_status status;
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status = resource_to_addr(acpi_res, &addr);
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if (ACPI_SUCCESS(status))
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info->res_num++;
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return AE_OK;
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}
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static acpi_status
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setup_resource(struct acpi_resource *acpi_res, void *data)
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{
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struct pci_root_info *info = data;
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struct resource *res;
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struct acpi_resource_address64 addr;
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acpi_status status;
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unsigned long flags;
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u64 start, orig_end, end;
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status = resource_to_addr(acpi_res, &addr);
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if (!ACPI_SUCCESS(status))
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return AE_OK;
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if (addr.resource_type == ACPI_MEMORY_RANGE) {
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flags = IORESOURCE_MEM;
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if (addr.info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
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flags |= IORESOURCE_PREFETCH;
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} else if (addr.resource_type == ACPI_IO_RANGE) {
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flags = IORESOURCE_IO;
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} else
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return AE_OK;
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start = addr.minimum + addr.translation_offset;
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orig_end = end = addr.maximum + addr.translation_offset;
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/* Exclude non-addressable range or non-addressable portion of range */
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end = min(end, (u64)iomem_resource.end);
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if (end <= start) {
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dev_info(&info->bridge->dev,
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"host bridge window [%#llx-%#llx] "
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"(ignored, not CPU addressable)\n", start, orig_end);
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return AE_OK;
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} else if (orig_end != end) {
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dev_info(&info->bridge->dev,
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"host bridge window [%#llx-%#llx] "
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"([%#llx-%#llx] ignored, not CPU addressable)\n",
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start, orig_end, end + 1, orig_end);
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}
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res = &info->res[info->res_num];
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res->name = info->name;
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res->flags = flags;
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res->start = start;
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res->end = end;
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res->child = NULL;
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if (!pci_use_crs) {
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dev_printk(KERN_DEBUG, &info->bridge->dev,
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"host bridge window %pR (ignored)\n", res);
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return AE_OK;
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}
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info->res_num++;
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if (addr.translation_offset)
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dev_info(&info->bridge->dev, "host bridge window %pR "
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"(PCI address [%#llx-%#llx])\n",
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res, res->start - addr.translation_offset,
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res->end - addr.translation_offset);
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else
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dev_info(&info->bridge->dev, "host bridge window %pR\n", res);
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return AE_OK;
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}
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static void coalesce_windows(struct pci_root_info *info, unsigned long type)
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{
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int i, j;
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struct resource *res1, *res2;
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for (i = 0; i < info->res_num; i++) {
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res1 = &info->res[i];
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if (!(res1->flags & type))
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continue;
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for (j = i + 1; j < info->res_num; j++) {
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res2 = &info->res[j];
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if (!(res2->flags & type))
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continue;
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/*
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* I don't like throwing away windows because then
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* our resources no longer match the ACPI _CRS, but
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* the kernel resource tree doesn't allow overlaps.
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*/
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if (resource_overlaps(res1, res2)) {
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res1->start = min(res1->start, res2->start);
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res1->end = max(res1->end, res2->end);
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dev_info(&info->bridge->dev,
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"host bridge window expanded to %pR; %pR ignored\n",
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res1, res2);
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res2->flags = 0;
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}
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}
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}
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}
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static void add_resources(struct pci_root_info *info,
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struct list_head *resources)
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{
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int i;
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struct resource *res, *root, *conflict;
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coalesce_windows(info, IORESOURCE_MEM);
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coalesce_windows(info, IORESOURCE_IO);
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for (i = 0; i < info->res_num; i++) {
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res = &info->res[i];
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if (res->flags & IORESOURCE_MEM)
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root = &iomem_resource;
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else if (res->flags & IORESOURCE_IO)
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root = &ioport_resource;
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else
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continue;
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conflict = insert_resource_conflict(root, res);
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if (conflict)
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dev_info(&info->bridge->dev,
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"ignoring host bridge window %pR (conflicts with %s %pR)\n",
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res, conflict->name, conflict);
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else
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pci_add_resource(resources, res);
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}
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}
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static void free_pci_root_info_res(struct pci_root_info *info)
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{
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kfree(info->res);
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info->res = NULL;
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info->res_num = 0;
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}
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static void __release_pci_root_info(struct pci_root_info *info)
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{
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int i;
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struct resource *res;
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for (i = 0; i < info->res_num; i++) {
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res = &info->res[i];
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if (!res->parent)
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continue;
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if (!(res->flags & (IORESOURCE_MEM | IORESOURCE_IO)))
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continue;
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release_resource(res);
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}
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free_pci_root_info_res(info);
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kfree(info);
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}
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static void release_pci_root_info(struct pci_host_bridge *bridge)
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{
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struct pci_root_info *info = bridge->release_data;
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__release_pci_root_info(info);
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}
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static void
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probe_pci_root_info(struct pci_root_info *info, struct acpi_device *device,
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int busnum, int domain)
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{
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size_t size;
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info->bridge = device;
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info->res_num = 0;
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acpi_walk_resources(device->handle, METHOD_NAME__CRS, count_resource,
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info);
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if (!info->res_num)
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return;
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size = sizeof(*info->res) * info->res_num;
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info->res_num = 0;
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info->res = kmalloc(size, GFP_KERNEL);
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if (!info->res)
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return;
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sprintf(info->name, "PCI Bus %04x:%02x", domain, busnum);
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acpi_walk_resources(device->handle, METHOD_NAME__CRS, setup_resource,
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info);
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}
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struct pci_bus * __devinit pci_acpi_scan_root(struct acpi_pci_root *root)
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{
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struct acpi_device *device = root->device;
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struct pci_root_info *info = NULL;
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int domain = root->segment;
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int busnum = root->secondary.start;
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LIST_HEAD(resources);
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struct pci_bus *bus;
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struct pci_sysdata *sd;
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int node;
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#ifdef CONFIG_ACPI_NUMA
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int pxm;
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#endif
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if (domain && !pci_domains_supported) {
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printk(KERN_WARNING "pci_bus %04x:%02x: "
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"ignored (multiple domains not supported)\n",
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domain, busnum);
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return NULL;
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}
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node = -1;
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#ifdef CONFIG_ACPI_NUMA
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pxm = acpi_get_pxm(device->handle);
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if (pxm >= 0)
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node = pxm_to_node(pxm);
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if (node != -1)
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set_mp_bus_to_node(busnum, node);
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else
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#endif
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node = get_mp_bus_to_node(busnum);
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if (node != -1 && !node_online(node))
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node = -1;
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info = kzalloc(sizeof(*info), GFP_KERNEL);
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if (!info) {
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printk(KERN_WARNING "pci_bus %04x:%02x: "
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"ignored (out of memory)\n", domain, busnum);
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return NULL;
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}
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sd = &info->sd;
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sd->domain = domain;
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sd->node = node;
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/*
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* Maybe the desired pci bus has been already scanned. In such case
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* it is unnecessary to scan the pci bus with the given domain,busnum.
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*/
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bus = pci_find_bus(domain, busnum);
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if (bus) {
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/*
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* If the desired bus exits, the content of bus->sysdata will
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* be replaced by sd.
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*/
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memcpy(bus->sysdata, sd, sizeof(*sd));
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kfree(info);
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} else {
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probe_pci_root_info(info, device, busnum, domain);
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/*
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* _CRS with no apertures is normal, so only fall back to
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* defaults or native bridge info if we're ignoring _CRS.
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*/
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if (pci_use_crs)
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add_resources(info, &resources);
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else {
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free_pci_root_info_res(info);
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x86_pci_root_bus_resources(busnum, &resources);
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}
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bus = pci_create_root_bus(NULL, busnum, &pci_root_ops, sd,
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&resources);
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if (bus) {
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bus->busn_res.end = pci_scan_child_bus(bus);
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pci_set_host_bridge_release(
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to_pci_host_bridge(bus->bridge),
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release_pci_root_info, info);
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} else {
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pci_free_resource_list(&resources);
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__release_pci_root_info(info);
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}
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}
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/* After the PCI-E bus has been walked and all devices discovered,
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* configure any settings of the fabric that might be necessary.
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*/
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if (bus) {
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struct pci_bus *child;
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list_for_each_entry(child, &bus->children, node) {
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struct pci_dev *self = child->self;
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if (!self)
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continue;
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pcie_bus_configure_settings(child, self->pcie_mpss);
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}
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}
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if (bus && node != -1) {
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#ifdef CONFIG_ACPI_NUMA
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if (pxm >= 0)
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dev_printk(KERN_DEBUG, &bus->dev,
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"on NUMA node %d (pxm %d)\n", node, pxm);
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#else
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dev_printk(KERN_DEBUG, &bus->dev, "on NUMA node %d\n", node);
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#endif
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}
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return bus;
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}
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int __init pci_acpi_init(void)
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{
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struct pci_dev *dev = NULL;
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if (acpi_noirq)
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return -ENODEV;
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printk(KERN_INFO "PCI: Using ACPI for IRQ routing\n");
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acpi_irq_penalty_init();
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pcibios_enable_irq = acpi_pci_irq_enable;
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pcibios_disable_irq = acpi_pci_irq_disable;
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x86_init.pci.init_irq = x86_init_noop;
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if (pci_routeirq) {
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/*
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* PCI IRQ routing is set up by pci_enable_device(), but we
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* also do it here in case there are still broken drivers that
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* don't use pci_enable_device().
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*/
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printk(KERN_INFO "PCI: Routing PCI interrupts for all devices because \"pci=routeirq\" specified\n");
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for_each_pci_dev(dev)
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acpi_pci_irq_enable(dev);
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}
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return 0;
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}
|