diff options
Diffstat (limited to 'drivers/iommu/intel_irq_remapping.c')
| -rw-r--r-- | drivers/iommu/intel_irq_remapping.c | 109 |
1 files changed, 47 insertions, 62 deletions
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index bab10b1002fb..ef5f65dbafe9 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -6,11 +6,11 @@ #include <linux/hpet.h> #include <linux/pci.h> #include <linux/irq.h> +#include <linux/intel-iommu.h> +#include <linux/acpi.h> #include <asm/io_apic.h> #include <asm/smp.h> #include <asm/cpu.h> -#include <linux/intel-iommu.h> -#include <acpi/acpi.h> #include <asm/irq_remapping.h> #include <asm/pci-direct.h> #include <asm/msidef.h> @@ -40,13 +40,15 @@ static int ir_ioapic_num, ir_hpet_num; static DEFINE_RAW_SPINLOCK(irq_2_ir_lock); +static int __init parse_ioapics_under_ir(void); + static struct irq_2_iommu *irq_2_iommu(unsigned int irq) { struct irq_cfg *cfg = irq_get_chip_data(irq); return cfg ? &cfg->irq_2_iommu : NULL; } -int get_irte(int irq, struct irte *entry) +static int get_irte(int irq, struct irte *entry) { struct irq_2_iommu *irq_iommu = irq_2_iommu(irq); unsigned long flags; @@ -69,19 +71,13 @@ static int alloc_irte(struct intel_iommu *iommu, int irq, u16 count) struct ir_table *table = iommu->ir_table; struct irq_2_iommu *irq_iommu = irq_2_iommu(irq); struct irq_cfg *cfg = irq_get_chip_data(irq); - u16 index, start_index; unsigned int mask = 0; unsigned long flags; - int i; + int index; if (!count || !irq_iommu) return -1; - /* - * start the IRTE search from index 0. - */ - index = start_index = 0; - if (count > 1) { count = __roundup_pow_of_two(count); mask = ilog2(count); @@ -96,32 +92,17 @@ static int alloc_irte(struct intel_iommu *iommu, int irq, u16 count) } raw_spin_lock_irqsave(&irq_2_ir_lock, flags); - do { - for (i = index; i < index + count; i++) - if (table->base[i].present) - break; - /* empty index found */ - if (i == index + count) - break; - - index = (index + count) % INTR_REMAP_TABLE_ENTRIES; - - if (index == start_index) { - raw_spin_unlock_irqrestore(&irq_2_ir_lock, flags); - printk(KERN_ERR "can't allocate an IRTE\n"); - return -1; - } - } while (1); - - for (i = index; i < index + count; i++) - table->base[i].present = 1; - - cfg->remapped = 1; - irq_iommu->iommu = iommu; - irq_iommu->irte_index = index; - irq_iommu->sub_handle = 0; - irq_iommu->irte_mask = mask; - + index = bitmap_find_free_region(table->bitmap, + INTR_REMAP_TABLE_ENTRIES, mask); + if (index < 0) { + pr_warn("IR%d: can't allocate an IRTE\n", iommu->seq_id); + } else { + cfg->remapped = 1; + irq_iommu->iommu = iommu; + irq_iommu->irte_index = index; + irq_iommu->sub_handle = 0; + irq_iommu->irte_mask = mask; + } raw_spin_unlock_irqrestore(&irq_2_ir_lock, flags); return index; @@ -254,6 +235,8 @@ static int clear_entries(struct irq_2_iommu *irq_iommu) set_64bit(&entry->low, 0); set_64bit(&entry->high, 0); } + bitmap_release_region(iommu->ir_table->bitmap, index, + irq_iommu->irte_mask); return qi_flush_iec(iommu, index, irq_iommu->irte_mask); } @@ -336,7 +319,7 @@ static int set_ioapic_sid(struct irte *irte, int apic) return -1; } - set_irte_sid(irte, 1, 0, sid); + set_irte_sid(irte, SVT_VERIFY_SID_SQ, SQ_ALL_16, sid); return 0; } @@ -453,6 +436,7 @@ static int intel_setup_irq_remapping(struct intel_iommu *iommu, int mode) { struct ir_table *ir_table; struct page *pages; + unsigned long *bitmap; ir_table = iommu->ir_table = kzalloc(sizeof(struct ir_table), GFP_ATOMIC); @@ -464,13 +448,23 @@ static int intel_setup_irq_remapping(struct intel_iommu *iommu, int mode) INTR_REMAP_PAGE_ORDER); if (!pages) { - printk(KERN_ERR "failed to allocate pages of order %d\n", - INTR_REMAP_PAGE_ORDER); + pr_err("IR%d: failed to allocate pages of order %d\n", + iommu->seq_id, INTR_REMAP_PAGE_ORDER); kfree(iommu->ir_table); return -ENOMEM; } + bitmap = kcalloc(BITS_TO_LONGS(INTR_REMAP_TABLE_ENTRIES), + sizeof(long), GFP_ATOMIC); + if (bitmap == NULL) { + pr_err("IR%d: failed to allocate bitmap\n", iommu->seq_id); + __free_pages(pages, INTR_REMAP_PAGE_ORDER); + kfree(ir_table); + return -ENOMEM; + } + ir_table->base = page_address(pages); + ir_table->bitmap = bitmap; iommu_set_irq_remapping(iommu, mode); return 0; @@ -521,6 +515,7 @@ static int __init dmar_x2apic_optout(void) static int __init intel_irq_remapping_supported(void) { struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; if (disable_irq_remap) return 0; @@ -539,12 +534,9 @@ static int __init intel_irq_remapping_supported(void) if (!dmar_ir_support()) return 0; - for_each_drhd_unit(drhd) { - struct intel_iommu *iommu = drhd->iommu; - + for_each_iommu(iommu, drhd) if (!ecap_ir_support(iommu->ecap)) return 0; - } return 1; } @@ -552,6 +544,7 @@ static int __init intel_irq_remapping_supported(void) static int __init intel_enable_irq_remapping(void) { struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; bool x2apic_present; int setup = 0; int eim = 0; @@ -564,6 +557,8 @@ static int __init intel_enable_irq_remapping(void) } if (x2apic_present) { + pr_info("Queued invalidation will be enabled to support x2apic and Intr-remapping.\n"); + eim = !dmar_x2apic_optout(); if (!eim) printk(KERN_WARNING @@ -572,9 +567,7 @@ static int __init intel_enable_irq_remapping(void) "Use 'intremap=no_x2apic_optout' to override BIOS request.\n"); } - for_each_drhd_unit(drhd) { - struct intel_iommu *iommu = drhd->iommu; - + for_each_iommu(iommu, drhd) { /* * If the queued invalidation is already initialized, * shouldn't disable it. @@ -599,9 +592,7 @@ static int __init intel_enable_irq_remapping(void) /* * check for the Interrupt-remapping support */ - for_each_drhd_unit(drhd) { - struct intel_iommu *iommu = drhd->iommu; - + for_each_iommu(iommu, drhd) { if (!ecap_ir_support(iommu->ecap)) continue; @@ -615,10 +606,8 @@ static int __init intel_enable_irq_remapping(void) /* * Enable queued invalidation for all the DRHD's. */ - for_each_drhd_unit(drhd) { - int ret; - struct intel_iommu *iommu = drhd->iommu; - ret = dmar_enable_qi(iommu); + for_each_iommu(iommu, drhd) { + int ret = dmar_enable_qi(iommu); if (ret) { printk(KERN_ERR "DRHD %Lx: failed to enable queued, " @@ -631,9 +620,7 @@ static int __init intel_enable_irq_remapping(void) /* * Setup Interrupt-remapping for all the DRHD's now. */ - for_each_drhd_unit(drhd) { - struct intel_iommu *iommu = drhd->iommu; - + for_each_iommu(iommu, drhd) { if (!ecap_ir_support(iommu->ecap)) continue; @@ -774,22 +761,20 @@ static int ir_parse_ioapic_hpet_scope(struct acpi_dmar_header *header, * Finds the assocaition between IOAPIC's and its Interrupt-remapping * hardware unit. */ -int __init parse_ioapics_under_ir(void) +static int __init parse_ioapics_under_ir(void) { struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; int ir_supported = 0; int ioapic_idx; - for_each_drhd_unit(drhd) { - struct intel_iommu *iommu = drhd->iommu; - + for_each_iommu(iommu, drhd) if (ecap_ir_support(iommu->ecap)) { if (ir_parse_ioapic_hpet_scope(drhd->hdr, iommu)) return -1; ir_supported = 1; } - } if (!ir_supported) return 0; @@ -807,7 +792,7 @@ int __init parse_ioapics_under_ir(void) return 1; } -int __init ir_dev_scope_init(void) +static int __init ir_dev_scope_init(void) { if (!irq_remapping_enabled) return 0; |