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IOMMU Upates for Linux v3.15

Browse source 
This time a few more updates queued up.
 
 	* Rework VT-d code to support ACPI devices
 
 	* Improvements for memory and PCI hotplug support
 	  in the VT-d driver
 
 	* Device-tree support for OMAP IOMMU
 
 	* Convert OMAP IOMMU to use devm_* interfaces
 
 	* Fixed PASID support for AMD IOMMU
 
 	* Other random cleanups and fixes for OMAP, ARM-SMMU
 	  and SHMOBILE IOMMU
 
 Most of the changes are in the VT-d driver because some rework was
 necessary for better hotplug and ACPI device support.
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Merge tag 'iommu-updates-v3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU upates from Joerg Roedel:
 "This time a few more updates queued up.

   - Rework VT-d code to support ACPI devices

   - Improvements for memory and PCI hotplug support in the VT-d driver

   - Device-tree support for OMAP IOMMU

   - Convert OMAP IOMMU to use devm_* interfaces

   - Fixed PASID support for AMD IOMMU

   - Other random cleanups and fixes for OMAP, ARM-SMMU and SHMOBILE
     IOMMU

  Most of the changes are in the VT-d driver because some rework was
  necessary for better hotplug and ACPI device support"

* tag 'iommu-updates-v3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (75 commits)
  iommu/vt-d: Fix error handling in ANDD processing
  iommu/vt-d: returning free pointer in get_domain_for_dev()
  iommu/vt-d: Only call dmar_acpi_dev_scope_init() if DRHD units present
  iommu/vt-d: Check for NULL pointer in dmar_acpi_dev_scope_init()
  iommu/amd: Fix logic to determine and checking max PASID
  iommu/vt-d: Include ACPI devices in iommu=pt
  iommu/vt-d: Finally enable translation for non-PCI devices
  iommu/vt-d: Remove to_pci_dev() in intel_map_page()
  iommu/vt-d: Remove pdev from intel_iommu_attach_device()
  iommu/vt-d: Remove pdev from iommu_no_mapping()
  iommu/vt-d: Make domain_add_dev_info() take struct device
  iommu/vt-d: Make domain_remove_one_dev_info() take struct device
  iommu/vt-d: Rename 'hwdev' variables to 'dev' now that that's the norm
  iommu/vt-d: Remove some pointless to_pci_dev() calls
  iommu/vt-d: Make get_valid_domain_for_dev() take struct device
  iommu/vt-d: Make iommu_should_identity_map() take struct device
  iommu/vt-d: Handle RMRRs for non-PCI devices
  iommu/vt-d: Make get_domain_for_dev() take struct device
  iommu/vt-d: Make domain_context_mapp{ed,ing}() take struct device
  iommu/vt-d: Make device_to_iommu() cope with non-PCI devices
  ...
This commit is contained in:
Linus Torvalds 2014-04-05 18:46:26 -07:00
commit 3f583bc219
19 changed files with 1754 additions and 990 deletions
Download patch file Download diff file Expand all files Collapse all files

82
include/linux/dmar.h
View file

@ -25,6 +25,8 @@
#include <linux/types.h>
#include <linux/msi.h>
#include <linux/irqreturn.h>
#include <linux/rwsem.h>
#include <linux/rcupdate.h>
struct acpi_dmar_header;
@ -34,13 +36,19 @@ struct acpi_dmar_header;
struct intel_iommu;
struct dmar_dev_scope {
struct device __rcu *dev;
u8 bus;
u8 devfn;
};
#ifdef CONFIG_DMAR_TABLE
extern struct acpi_table_header *dmar_tbl;
struct dmar_drhd_unit {
struct list_head list; /* list of drhd units */
struct acpi_dmar_header *hdr; /* ACPI header */
u64 reg_base_addr; /* register base address*/
struct pci_dev **devices; /* target device array */
struct dmar_dev_scope *devices;/* target device array */
int devices_cnt; /* target device count */
u16 segment; /* PCI domain */
u8 ignored:1; /* ignore drhd */
@ -48,33 +56,66 @@ struct dmar_drhd_unit {
struct intel_iommu *iommu;
};
struct dmar_pci_notify_info {
struct pci_dev *dev;
unsigned long event;
int bus;
u16 seg;
u16 level;
struct acpi_dmar_pci_path path[];
} __attribute__((packed));
extern struct rw_semaphore dmar_global_lock;
extern struct list_head dmar_drhd_units;
#define for_each_drhd_unit(drhd) \
list_for_each_entry(drhd, &dmar_drhd_units, list)
list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)
#define for_each_active_drhd_unit(drhd) \
list_for_each_entry(drhd, &dmar_drhd_units, list) \
list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
if (drhd->ignored) {} else
#define for_each_active_iommu(i, drhd) \
list_for_each_entry(drhd, &dmar_drhd_units, list) \
list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
if (i=drhd->iommu, drhd->ignored) {} else
#define for_each_iommu(i, drhd) \
list_for_each_entry(drhd, &dmar_drhd_units, list) \
list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
if (i=drhd->iommu, 0) {} else
static inline bool dmar_rcu_check(void)
{
return rwsem_is_locked(&dmar_global_lock) ||
system_state == SYSTEM_BOOTING;
}
#define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check())
#define for_each_dev_scope(a, c, p, d) \
for ((p) = 0; ((d) = (p) < (c) ? dmar_rcu_dereference((a)[(p)].dev) : \
NULL, (p) < (c)); (p)++)
#define for_each_active_dev_scope(a, c, p, d) \
for_each_dev_scope((a), (c), (p), (d)) if (!(d)) { continue; } else
extern int dmar_table_init(void);
extern int dmar_dev_scope_init(void);
extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,
struct pci_dev ***devices, u16 segment);
extern void dmar_free_dev_scope(struct pci_dev ***devices, int *cnt);
struct dmar_dev_scope **devices, u16 segment);
extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt);
extern void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt);
extern int dmar_insert_dev_scope(struct dmar_pci_notify_info *info,
void *start, void*end, u16 segment,
struct dmar_dev_scope *devices,
int devices_cnt);
extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info,
u16 segment, struct dmar_dev_scope *devices,
int count);
/* Intel IOMMU detection */
extern int detect_intel_iommu(void);
extern int enable_drhd_fault_handling(void);
#else
struct dmar_pci_notify_info;
static inline int detect_intel_iommu(void)
{
return -ENODEV;
@ -138,30 +179,9 @@ extern int arch_setup_dmar_msi(unsigned int irq);
#ifdef CONFIG_INTEL_IOMMU
extern int iommu_detected, no_iommu;
extern struct list_head dmar_rmrr_units;
struct dmar_rmrr_unit {
struct list_head list; /* list of rmrr units */
struct acpi_dmar_header *hdr; /* ACPI header */
u64 base_address; /* reserved base address*/
u64 end_address; /* reserved end address */
struct pci_dev **devices; /* target devices */
int devices_cnt; /* target device count */
};
#define for_each_rmrr_units(rmrr) \
list_for_each_entry(rmrr, &dmar_rmrr_units, list)
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 */
u8 include_all:1; /* include all ports */
};
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);
extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
extern int intel_iommu_init(void);
#else /* !CONFIG_INTEL_IOMMU: */
static inline int intel_iommu_init(void) { return -ENODEV; }
@ -173,7 +193,7 @@ static inline int dmar_parse_one_atsr(struct acpi_dmar_header *header)
{
return 0;
}
static inline int dmar_parse_rmrr_atsr_dev(void)
static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
{
return 0;
}

1
include/linux/intel-iommu.h
View file

@ -319,6 +319,7 @@ struct intel_iommu {
int agaw; /* agaw of this iommu */
int msagaw; /* max sagaw of this iommu */
unsigned int irq;
u16 segment; /* PCI segment# */
unsigned char name[13]; /* Device Name */
#ifdef CONFIG_INTEL_IOMMU

2
include/linux/iova.h
View file

@ -47,5 +47,7 @@ void copy_reserved_iova(struct iova_domain *from, struct iova_domain *to);
void init_iova_domain(struct iova_domain *iovad, unsigned long pfn_32bit);
struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn);
void put_iova_domain(struct iova_domain *iovad);
struct iova *split_and_remove_iova(struct iova_domain *iovad,
struct iova *iova, unsigned long pfn_lo, unsigned long pfn_hi);
#endif