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author | Suresh Siddha <suresh.b.siddha@intel.com> | 2011-08-24 00:05:20 (GMT) |
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committer | Ingo Molnar <mingo@elte.hu> | 2011-09-21 08:21:54 (GMT) |
commit | 318fe7df9d8456f778451b01913b5d0dc0a25854 (patch) | |
tree | b134ae443ed05996f98660469590034ff19f76b5 /drivers/iommu/intel-iommu.c | |
parent | c2c7286ac6d996a8ffc8d391d782ba35570b1236 (diff) | |
download | linux-318fe7df9d8456f778451b01913b5d0dc0a25854.tar.xz |
iommu: Move IOMMU specific code to intel-iommu.c
Move the IOMMU specific routines to intel-iommu.c leaving the
dmar.c to the common ACPI dmar code shared between DMA-remapping
and Interrupt-remapping.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: yinghai@kernel.org
Cc: youquan.song@intel.com
Cc: joerg.roedel@amd.com
Cc: tony.luck@intel.com
Cc: dwmw2@infradead.org
Link: http://lkml.kernel.org/r/20110824001456.282401285@sbsiddha-desk.sc.intel.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/iommu/intel-iommu.c')
-rw-r--r-- | drivers/iommu/intel-iommu.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index df69618..e8eb4c5 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3390,6 +3390,151 @@ static void __init init_iommu_pm_ops(void) static inline void init_iommu_pm_ops(void) {} #endif /* CONFIG_PM */ +LIST_HEAD(dmar_rmrr_units); + +static void __init dmar_register_rmrr_unit(struct dmar_rmrr_unit *rmrr) +{ + list_add(&rmrr->list, &dmar_rmrr_units); +} + + +int __init dmar_parse_one_rmrr(struct acpi_dmar_header *header) +{ + struct acpi_dmar_reserved_memory *rmrr; + struct dmar_rmrr_unit *rmrru; + + rmrru = kzalloc(sizeof(*rmrru), GFP_KERNEL); + if (!rmrru) + return -ENOMEM; + + rmrru->hdr = header; + rmrr = (struct acpi_dmar_reserved_memory *)header; + rmrru->base_address = rmrr->base_address; + rmrru->end_address = rmrr->end_address; + + dmar_register_rmrr_unit(rmrru); + return 0; +} + +static int __init +rmrr_parse_dev(struct dmar_rmrr_unit *rmrru) +{ + struct acpi_dmar_reserved_memory *rmrr; + int ret; + + rmrr = (struct acpi_dmar_reserved_memory *) rmrru->hdr; + ret = dmar_parse_dev_scope((void *)(rmrr + 1), + ((void *)rmrr) + rmrr->header.length, + &rmrru->devices_cnt, &rmrru->devices, rmrr->segment); + + if (ret || (rmrru->devices_cnt == 0)) { + list_del(&rmrru->list); + kfree(rmrru); + } + return ret; +} + +static LIST_HEAD(dmar_atsr_units); + +int __init dmar_parse_one_atsr(struct acpi_dmar_header *hdr) +{ + struct acpi_dmar_atsr *atsr; + struct dmar_atsr_unit *atsru; + + atsr = container_of(hdr, struct acpi_dmar_atsr, header); + atsru = kzalloc(sizeof(*atsru), GFP_KERNEL); + if (!atsru) + return -ENOMEM; + + atsru->hdr = hdr; + atsru->include_all = atsr->flags & 0x1; + + list_add(&atsru->list, &dmar_atsr_units); + + return 0; +} + +static int __init atsr_parse_dev(struct dmar_atsr_unit *atsru) +{ + int rc; + struct acpi_dmar_atsr *atsr; + + if (atsru->include_all) + return 0; + + atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header); + rc = dmar_parse_dev_scope((void *)(atsr + 1), + (void *)atsr + atsr->header.length, + &atsru->devices_cnt, &atsru->devices, + atsr->segment); + if (rc || !atsru->devices_cnt) { + list_del(&atsru->list); + kfree(atsru); + } + + return rc; +} + +int dmar_find_matched_atsr_unit(struct pci_dev *dev) +{ + int i; + struct pci_bus *bus; + struct acpi_dmar_atsr *atsr; + struct dmar_atsr_unit *atsru; + + dev = pci_physfn(dev); + + list_for_each_entry(atsru, &dmar_atsr_units, list) { + atsr = container_of(atsru->hdr, struct acpi_dmar_atsr, header); + if (atsr->segment == pci_domain_nr(dev->bus)) + goto found; + } + + return 0; + +found: + for (bus = dev->bus; bus; bus = bus->parent) { + struct pci_dev *bridge = bus->self; + + if (!bridge || !pci_is_pcie(bridge) || + bridge->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE) + return 0; + + if (bridge->pcie_type == PCI_EXP_TYPE_ROOT_PORT) { + for (i = 0; i < atsru->devices_cnt; i++) + if (atsru->devices[i] == bridge) + return 1; + break; + } + } + + if (atsru->include_all) + return 1; + + return 0; +} + +int dmar_parse_rmrr_atsr_dev(void) +{ + struct dmar_rmrr_unit *rmrr, *rmrr_n; + struct dmar_atsr_unit *atsr, *atsr_n; + int ret = 0; + + list_for_each_entry_safe(rmrr, rmrr_n, &dmar_rmrr_units, list) { + ret = rmrr_parse_dev(rmrr); + if (ret) + return ret; + } + + list_for_each_entry_safe(atsr, atsr_n, &dmar_atsr_units, list) { + ret = atsr_parse_dev(atsr); + if (ret) + return ret; + } + + return ret; +} + /* * Here we only respond to action of unbound device from driver. * @@ -3454,6 +3599,12 @@ int __init intel_iommu_init(void) return -ENODEV; } + if (list_empty(&dmar_rmrr_units)) + printk(KERN_INFO "DMAR: No RMRR found\n"); + + if (list_empty(&dmar_atsr_units)) + printk(KERN_INFO "DMAR: No ATSR found\n"); + if (dmar_init_reserved_ranges()) { if (force_on) panic("tboot: Failed to reserve iommu ranges\n"); |