[RFC PATCH 13/14] IOMMU: Add dmar_parse_one_drhd()

Yinghai Lu
2012-04-03T02:21:11Z

To parse new hot-added iommu dmar entry table

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
---
drivers/iommu/dmar.c | 51 ++++++++++++++++++++++++++++++++++++++++---------
include/linux/dmar.h | 46 ++++++++++++++++++++++++++++++++++++--------
2 files changed, 78 insertions(+), 19 deletions(-)

diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index cd5eee3..f96b8ce 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -171,8 +171,9 @@ int dmar_parse_dev_scope(void *start, void *end, int *cnt,
* structure which uniquely represent one DMA remapping hardware unit
* present in the platform
*/
-static int __init
-dmar_parse_one_drhd(struct acpi_dmar_header *header)
+static int
+__dmar_parse_one_drhd(struct acpi_dmar_header *header,
+ struct dmar_drhd_unit **pdmaru)
{
struct acpi_dmar_hardware_unit *drhd;
struct dmar_drhd_unit *dmaru;
@@ -194,10 +195,18 @@ dmar_parse_one_drhd(struct acpi_dmar_header *header)
return ret;
}
dmar_register_drhd_unit(dmaru);
+ if (pdmaru)
+ *pdmaru = dmaru;
return 0;
}

-static int __init dmar_parse_dev(struct dmar_drhd_unit *dmaru)
+static int __init
+dmar_parse_one_drhd(struct acpi_dmar_header *header)
+{
+ return __dmar_parse_one_drhd(header, NULL);
+}
+
+static int dmar_parse_dev(struct dmar_drhd_unit *dmaru)
{
struct acpi_dmar_hardware_unit *drhd;
int ret = 0;
@@ -218,10 +227,10 @@ static int __init dmar_parse_dev(struct dmar_drhd_unit *dmaru)
return ret;
}

-#ifdef CONFIG_ACPI_NUMA
-static int __init
+static int
dmar_parse_one_rhsa(struct acpi_dmar_header *header)
{
+#ifdef CONFIG_ACPI_NUMA
struct acpi_dmar_rhsa *rhsa;
struct dmar_drhd_unit *drhd;

@@ -245,12 +254,11 @@ dmar_parse_one_rhsa(struct acpi_dmar_header *header)
dmi_get_system_info(DMI_BIOS_VERSION),
dmi_get_system_info(DMI_PRODUCT_VERSION));

+#endif
return 0;
}
-#endif

-static void __init
-dmar_table_print_dmar_entry(struct acpi_dmar_header *header)
+static void dmar_table_print_dmar_entry(struct acpi_dmar_header *header)
{
struct acpi_dmar_hardware_unit *drhd;
struct acpi_dmar_reserved_memory *rmrr;
@@ -364,9 +372,7 @@ parse_dmar_table(void)
ret = dmar_parse_one_atsr(entry_header);
break;
case ACPI_DMAR_HARDWARE_AFFINITY:
-#ifdef CONFIG_ACPI_NUMA
ret = dmar_parse_one_rhsa(entry_header);
-#endif
break;
default:
printk(KERN_WARNING PREFIX
@@ -545,6 +551,23 @@ void restore_dev_to_drhd(struct pci_dev *dev)
drhd->devices[i] = pci_dev_get(dev);
}

+static void remove_dmaru_from_saved_list(void *drhd,
+ struct list_head *lh)
+{
+ struct dev_dmaru *m, *n;
+
+ list_for_each_entry_safe(m, n, lh, list) {
+ if (m->dmaru == drhd) {
+ list_del(&m->list);
+ kfree(m);
+ }
+ }
+}
+static void remove_dmaru_from_saved_dev_drhd_list(void *drhd)
+{
+ remove_dmaru_from_saved_list(drhd, &saved_dev_drhd_list);
+}
+
#ifdef CONFIG_INTEL_IOMMU
static LIST_HEAD(saved_dev_atsr_list);
void remove_dev_from_atsr(struct pci_dev *dev)
@@ -581,6 +604,14 @@ void restore_dev_to_atsr(struct pci_dev *dev)
if (atsr)
atsr->devices[i] = pci_dev_get(dev);
}
+static void remove_atsru_from_saved_dev_atsru_list(void *atsr)
+{
+ remove_dmaru_from_saved_list(atsr, &saved_dev_atsr_list);
+}
+#else
+static void remove_atsru_from_saved_dev_atsru_list(struct dmar_atsr_unit *atsr)
+{
+}
#endif /* CONFIG_INTEL_IOMMU */

#endif /* CONFIG_HOTPLUG */
diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index 305db55..79c3898 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -143,6 +143,15 @@ static inline void remove_dev_from_atsr(struct pci_dev *dev) { }
static inline void restore_dev_to_atsr(struct pci_dev *dev) { }
#endif

+struct dmar_atsr_unit {
+ struct list_head list; /* list of ATSR units */
+ struct acpi_dmar_header *hdr; /* ACPI header */
+ struct pci_dev **devices; /* target devices */
+ int devices_cnt; /* target device count */
+ u16 segment; /* PCI domain */
+ u8 include_all:1; /* include all ports */
+};
+
#ifdef CONFIG_INTEL_IOMMU
extern int iommu_detected, no_iommu;
extern struct list_head dmar_rmrr_units;
@@ -159,24 +168,19 @@ struct dmar_rmrr_unit {
list_for_each_entry(rmrr, &dmar_rmrr_units, list)

extern struct list_head dmar_atsr_units;
-struct dmar_atsr_unit {
- struct list_head list; /* list of ATSR units */
- struct acpi_dmar_header *hdr; /* ACPI header */
- struct pci_dev **devices; /* target devices */
- int devices_cnt; /* target device count */
- u16 segment; /* PCI domain */
- u8 include_all:1; /* include all ports */
-};
-
#define for_each_atsr_unit(atsr) \
list_for_each_entry(atsr, &dmar_atsr_units, list)

int dmar_parse_rmrr_atsr_dev(void);
extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header);
extern int dmar_parse_one_atsr(struct acpi_dmar_header *header);
+int __dmar_parse_one_atsr(struct acpi_dmar_header *header,
+ struct dmar_atsr_unit **patsru);
+int atsr_parse_dev(struct dmar_atsr_unit *atsru);
extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,
struct pci_dev ***devices, u16 segment);
extern int intel_iommu_init(void);
+int init_dmar_one(struct dmar_drhd_unit *drhd);
#else /* !CONFIG_INTEL_IOMMU: */
static inline int intel_iommu_init(void) { return -ENODEV; }
static inline int dmar_parse_one_rmrr(struct acpi_dmar_header *header)
@@ -187,10 +191,34 @@ static inline int dmar_parse_one_atsr(struct acpi_dmar_header *header)
{
return 0;
}
+static inline int __dmar_parse_one_atsr(struct acpi_dmar_header *header,
+ struct dmar_atsr_unit **patsru)
+{
+ return 0;
+}
+static inline int atsr_parse_dev(struct dmar_atsr_unit *atsru)
+{
+ return 0;
+}
static inline int dmar_parse_rmrr_atsr_dev(void)
{
return 0;
}
+static inline int init_dmar_one(struct dmar_drhd_unit *drhd)
+{
+ return 0;
+}
#endif /* CONFIG_INTEL_IOMMU */

+#ifdef CONFIG_IRQ_REMAP
+void disable_irq_remapping_one(struct dmar_drhd_unit *drhd);
+int intel_enable_irq_remapping_one(struct dmar_drhd_unit *drhd);
+#else
+static inline void disable_irq_remapping_one(struct dmar_drhd_unit *drhd) { }
+static inline int intel_enable_irq_remapping_one(struct dmar_drhd_unit *drhd)
+{
+ return 0;
+}
+#endif
+
#endif /* __DMAR_H__ */
--
1.7.7