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Merge branches 'amd/fixes', 'debug/dma-api', 'arm/omap', 'arm/msm', 'core', 'iommu/fault-reporting' and 'api/iommu-ops-per-bus' into next

Browse Source 
Conflicts:
	drivers/iommu/amd_iommu.c
	drivers/iommu/iommu.c
This commit is contained in:
Joerg Roedel 2011-10-21 14:38:55 +02:00
commit 1abb4ba596
28 changed files with 869 additions and 647 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
arch/arm/mach-omap2/iommu2.c
View File

@ -66,7 +66,7 @@
((pgsz) == MMU_CAM_PGSZ_4K) ? 0xfffff000 : 0)
static void __iommu_set_twl(struct iommu *obj, bool on)
static void __iommu_set_twl(struct omap_iommu *obj, bool on)
{
u32 l = iommu_read_reg(obj, MMU_CNTL);
@ -85,7 +85,7 @@ static void __iommu_set_twl(struct iommu *obj, bool on)
}
static int omap2_iommu_enable(struct iommu *obj)
static int omap2_iommu_enable(struct omap_iommu *obj)
{
u32 l, pa;
unsigned long timeout;
@ -127,7 +127,7 @@ static int omap2_iommu_enable(struct iommu *obj)
return 0;
}
static void omap2_iommu_disable(struct iommu *obj)
static void omap2_iommu_disable(struct omap_iommu *obj)
{
u32 l = iommu_read_reg(obj, MMU_CNTL);
@ -138,12 +138,12 @@ static void omap2_iommu_disable(struct iommu *obj)
dev_dbg(obj->dev, "%s is shutting down\n", obj->name);
}
static void omap2_iommu_set_twl(struct iommu *obj, bool on)
static void omap2_iommu_set_twl(struct omap_iommu *obj, bool on)
{
__iommu_set_twl(obj, false);
}
static u32 omap2_iommu_fault_isr(struct iommu *obj, u32 *ra)
static u32 omap2_iommu_fault_isr(struct omap_iommu *obj, u32 *ra)
{
u32 stat, da;
u32 errs = 0;
@ -173,13 +173,13 @@ static u32 omap2_iommu_fault_isr(struct iommu *obj, u32 *ra)
return errs;
}
static void omap2_tlb_read_cr(struct iommu *obj, struct cr_regs *cr)
static void omap2_tlb_read_cr(struct omap_iommu *obj, struct cr_regs *cr)
{
cr->cam = iommu_read_reg(obj, MMU_READ_CAM);
cr->ram = iommu_read_reg(obj, MMU_READ_RAM);
}
static void omap2_tlb_load_cr(struct iommu *obj, struct cr_regs *cr)
static void omap2_tlb_load_cr(struct omap_iommu *obj, struct cr_regs *cr)
{
iommu_write_reg(obj, cr->cam | MMU_CAM_V, MMU_CAM);
iommu_write_reg(obj, cr->ram, MMU_RAM);
@ -193,7 +193,8 @@ static u32 omap2_cr_to_virt(struct cr_regs *cr)
return cr->cam & mask;
}
static struct cr_regs *omap2_alloc_cr(struct iommu *obj, struct iotlb_entry *e)
static struct cr_regs *omap2_alloc_cr(struct omap_iommu *obj,
struct iotlb_entry *e)
{
struct cr_regs *cr;
@ -230,7 +231,8 @@ static u32 omap2_get_pte_attr(struct iotlb_entry *e)
return attr;
}
static ssize_t omap2_dump_cr(struct iommu *obj, struct cr_regs *cr, char *buf)
static ssize_t
omap2_dump_cr(struct omap_iommu *obj, struct cr_regs *cr, char *buf)
{
char *p = buf;
@ -254,7 +256,8 @@ static ssize_t omap2_dump_cr(struct iommu *obj, struct cr_regs *cr, char *buf)
goto out; \
} while (0)
static ssize_t omap2_iommu_dump_ctx(struct iommu *obj, char *buf, ssize_t len)
static ssize_t
omap2_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len)
{
char *p = buf;
@ -280,7 +283,7 @@ out:
return p - buf;
}
static void omap2_iommu_save_ctx(struct iommu *obj)
static void omap2_iommu_save_ctx(struct omap_iommu *obj)
{
int i;
u32 *p = obj->ctx;
@ -293,7 +296,7 @@ static void omap2_iommu_save_ctx(struct iommu *obj)
BUG_ON(p[0] != IOMMU_ARCH_VERSION);
}
static void omap2_iommu_restore_ctx(struct iommu *obj)
static void omap2_iommu_restore_ctx(struct omap_iommu *obj)
{
int i;
u32 *p = obj->ctx;
@ -343,13 +346,13 @@ static const struct iommu_functions omap2_iommu_ops = {
static int __init omap2_iommu_init(void)
{
return install_iommu_arch(&omap2_iommu_ops);
return omap_install_iommu_arch(&omap2_iommu_ops);
}
module_init(omap2_iommu_init);
static void __exit omap2_iommu_exit(void)
{
uninstall_iommu_arch(&omap2_iommu_ops);
omap_uninstall_iommu_arch(&omap2_iommu_ops);
}
module_exit(omap2_iommu_exit);

12
arch/arm/plat-omap/Kconfig
View File

@ -132,18 +132,6 @@ config OMAP_MBOX_KFIFO_SIZE
This can also be changed at runtime (via the mbox_kfifo_size
module parameter).
config OMAP_IOMMU
tristate
config OMAP_IOMMU_DEBUG
tristate "Export OMAP IOMMU internals in DebugFS"
depends on OMAP_IOMMU && DEBUG_FS
help
Select this to see extensive information about
the internal state of OMAP IOMMU in debugfs.
Say N unless you know you need this.
config OMAP_IOMMU_IVA2
bool

2
arch/arm/plat-omap/Makefile
View File

@ -18,8 +18,6 @@ obj-$(CONFIG_ARCH_OMAP3) += omap_device.o
obj-$(CONFIG_ARCH_OMAP4) += omap_device.o
obj-$(CONFIG_OMAP_MCBSP) += mcbsp.o
obj-$(CONFIG_OMAP_IOMMU) += iommu.o iovmm.o
obj-$(CONFIG_OMAP_IOMMU_DEBUG) += iommu-debug.o
obj-$(CONFIG_CPU_FREQ) += cpu-omap.o
obj-$(CONFIG_OMAP_DM_TIMER) += dmtimer.o

72
arch/arm/plat-omap/include/plat/iommu.h
View File

@ -25,16 +25,17 @@ struct iotlb_entry {
};
};
struct iommu {
struct omap_iommu {
const char *name;
struct module *owner;
struct clk *clk;
void __iomem *regbase;
struct device *dev;
void *isr_priv;
struct iommu_domain *domain;
unsigned int refcount;
struct mutex iommu_lock; /* global for this whole object */
spinlock_t iommu_lock; /* global for this whole object */
/*
* We don't change iopgd for a situation like pgd for a task,
@ -48,8 +49,6 @@ struct iommu {
struct list_head mmap;
struct mutex mmap_lock; /* protect mmap */
int (*isr)(struct iommu *obj, u32 da, u32 iommu_errs, void *priv);
void *ctx; /* iommu context: registres saved area */
u32 da_start;
u32 da_end;
@ -81,25 +80,27 @@ struct iotlb_lock {
struct iommu_functions {
unsigned long version;
int (*enable)(struct iommu *obj);
void (*disable)(struct iommu *obj);
void (*set_twl)(struct iommu *obj, bool on);
u32 (*fault_isr)(struct iommu *obj, u32 *ra);
int (*enable)(struct omap_iommu *obj);
void (*disable)(struct omap_iommu *obj);
void (*set_twl)(struct omap_iommu *obj, bool on);
u32 (*fault_isr)(struct omap_iommu *obj, u32 *ra);
void (*tlb_read_cr)(struct iommu *obj, struct cr_regs *cr);
void (*tlb_load_cr)(struct iommu *obj, struct cr_regs *cr);
void (*tlb_read_cr)(struct omap_iommu *obj, struct cr_regs *cr);
void (*tlb_load_cr)(struct omap_iommu *obj, struct cr_regs *cr);
struct cr_regs *(*alloc_cr)(struct iommu *obj, struct iotlb_entry *e);
struct cr_regs *(*alloc_cr)(struct omap_iommu *obj,
struct iotlb_entry *e);
int (*cr_valid)(struct cr_regs *cr);
u32 (*cr_to_virt)(struct cr_regs *cr);
void (*cr_to_e)(struct cr_regs *cr, struct iotlb_entry *e);
ssize_t (*dump_cr)(struct iommu *obj, struct cr_regs *cr, char *buf);
ssize_t (*dump_cr)(struct omap_iommu *obj, struct cr_regs *cr,
char *buf);
u32 (*get_pte_attr)(struct iotlb_entry *e);
void (*save_ctx)(struct iommu *obj);
void (*restore_ctx)(struct iommu *obj);
ssize_t (*dump_ctx)(struct iommu *obj, char *buf, ssize_t len);
void (*save_ctx)(struct omap_iommu *obj);
void (*restore_ctx)(struct omap_iommu *obj);
ssize_t (*dump_ctx)(struct omap_iommu *obj, char *buf, ssize_t len);
};
struct iommu_platform_data {
@ -150,40 +151,31 @@ struct iommu_platform_data {
/*
* global functions
*/
extern u32 iommu_arch_version(void);
extern u32 omap_iommu_arch_version(void);
extern void iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
extern u32 iotlb_cr_to_virt(struct cr_regs *cr);
extern void omap_iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
extern int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e);
extern void iommu_set_twl(struct iommu *obj, bool on);
extern void flush_iotlb_page(struct iommu *obj, u32 da);
extern void flush_iotlb_range(struct iommu *obj, u32 start, u32 end);
extern void flush_iotlb_all(struct iommu *obj);
extern int
omap_iopgtable_store_entry(struct omap_iommu *obj, struct iotlb_entry *e);
extern int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e);
extern void iopgtable_lookup_entry(struct iommu *obj, u32 da, u32 **ppgd,
u32 **ppte);
extern size_t iopgtable_clear_entry(struct iommu *obj, u32 iova);
extern int iommu_set_da_range(struct iommu *obj, u32 start, u32 end);
extern struct iommu *iommu_get(const char *name);
extern void iommu_put(struct iommu *obj);
extern int iommu_set_isr(const char *name,
int (*isr)(struct iommu *obj, u32 da, u32 iommu_errs,
extern int omap_iommu_set_isr(const char *name,
int (*isr)(struct omap_iommu *obj, u32 da, u32 iommu_errs,
void *priv),
void *isr_priv);
extern void iommu_save_ctx(struct iommu *obj);
extern void iommu_restore_ctx(struct iommu *obj);
extern void omap_iommu_save_ctx(struct omap_iommu *obj);
extern void omap_iommu_restore_ctx(struct omap_iommu *obj);
extern int install_iommu_arch(const struct iommu_functions *ops);
extern void uninstall_iommu_arch(const struct iommu_functions *ops);
extern int omap_install_iommu_arch(const struct iommu_functions *ops);
extern void omap_uninstall_iommu_arch(const struct iommu_functions *ops);
extern int foreach_iommu_device(void *data,
extern int omap_foreach_iommu_device(void *data,
int (*fn)(struct device *, void *));
extern ssize_t iommu_dump_ctx(struct iommu *obj, char *buf, ssize_t len);
extern size_t dump_tlb_entries(struct iommu *obj, char *buf, ssize_t len);
extern ssize_t
omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t len);
extern size_t
omap_dump_tlb_entries(struct omap_iommu *obj, char *buf, ssize_t len);
struct device *omap_find_iommu_device(const char *name);
#endif /* __MACH_IOMMU_H */

4
arch/arm/plat-omap/include/plat/iommu2.h
View File

@ -83,12 +83,12 @@
/*
* register accessors
*/
static inline u32 iommu_read_reg(struct iommu *obj, size_t offs)
static inline u32 iommu_read_reg(struct omap_iommu *obj, size_t offs)
{
return __raw_readl(obj->regbase + offs);
}
static inline void iommu_write_reg(struct iommu *obj, u32 val, size_t offs)
static inline void iommu_write_reg(struct omap_iommu *obj, u32 val, size_t offs)
{
__raw_writel(val, obj->regbase + offs);
}

20
arch/arm/plat-omap/iopgtable.h → arch/arm/plat-omap/include/plat/iopgtable.h
View File

@ -56,6 +56,19 @@
#define IOPAGE_MASK IOPTE_MASK
/**
* omap_iommu_translate() - va to pa translation
* @d: omap iommu descriptor
* @va: virtual address
* @mask: omap iommu descriptor mask
*
* va to pa translation
*/
static inline phys_addr_t omap_iommu_translate(u32 d, u32 va, u32 mask)
{
return (d & mask) | (va & (~mask));
}
/*
* some descriptor attributes.
*/
@ -64,10 +77,15 @@
#define IOPGD_SUPER (1 << 18 | 2 << 0)
#define iopgd_is_table(x) (((x) & 3) == IOPGD_TABLE)
#define iopgd_is_section(x) (((x) & (1 << 18 | 3)) == IOPGD_SECTION)
#define iopgd_is_super(x) (((x) & (1 << 18 | 3)) == IOPGD_SUPER)
#define IOPTE_SMALL (2 << 0)
#define IOPTE_LARGE (1 << 0)
#define iopte_is_small(x) (((x) & 2) == IOPTE_SMALL)
#define iopte_is_large(x) (((x) & 3) == IOPTE_LARGE)
/* to find an entry in a page-table-directory */
#define iopgd_index(da) (((da) >> IOPGD_SHIFT) & (PTRS_PER_IOPGD - 1))
#define iopgd_offset(obj, da) ((obj)->iopgd + iopgd_index(da))
@ -97,6 +115,6 @@ static inline u32 iotlb_init_entry(struct iotlb_entry *e, u32 da, u32 pa,
}
#define to_iommu(dev) \
(struct iommu *)platform_get_drvdata(to_platform_device(dev))
(struct omap_iommu *)platform_get_drvdata(to_platform_device(dev))
#endif /* __PLAT_OMAP_IOMMU_H */

30
arch/arm/plat-omap/include/plat/iovmm.h
View File

@ -13,8 +13,10 @@
#ifndef __IOMMU_MMAP_H
#define __IOMMU_MMAP_H
#include <linux/iommu.h>
struct iovm_struct {
struct iommu *iommu; /* iommu object which this belongs to */
struct omap_iommu *iommu; /* iommu object which this belongs to */
u32 da_start; /* area definition */
u32 da_end;
u32 flags; /* IOVMF_: see below */
@ -70,20 +72,18 @@ struct iovm_struct {
#define IOVMF_DA_FIXED (1 << (4 + IOVMF_SW_SHIFT))
extern struct iovm_struct *find_iovm_area(struct iommu *obj, u32 da);
extern u32 iommu_vmap(struct iommu *obj, u32 da,
extern struct iovm_struct *omap_find_iovm_area(struct omap_iommu *obj, u32 da);
extern u32
omap_iommu_vmap(struct iommu_domain *domain, struct omap_iommu *obj, u32 da,
const struct sg_table *sgt, u32 flags);
extern struct sg_table *iommu_vunmap(struct iommu *obj, u32 da);
extern u32 iommu_vmalloc(struct iommu *obj, u32 da, size_t bytes,
u32 flags);
extern void iommu_vfree(struct iommu *obj, const u32 da);
extern u32 iommu_kmap(struct iommu *obj, u32 da, u32 pa, size_t bytes,
u32 flags);
extern void iommu_kunmap(struct iommu *obj, u32 da);
extern u32 iommu_kmalloc(struct iommu *obj, u32 da, size_t bytes,
u32 flags);
extern void iommu_kfree(struct iommu *obj, u32 da);
extern void *da_to_va(struct iommu *obj, u32 da);
extern struct sg_table *omap_iommu_vunmap(struct iommu_domain *domain,
struct omap_iommu *obj, u32 da);
extern u32
omap_iommu_vmalloc(struct iommu_domain *domain, struct omap_iommu *obj,
u32 da, size_t bytes, u32 flags);
extern void
omap_iommu_vfree(struct iommu_domain *domain, struct omap_iommu *obj,
const u32 da);
extern void *omap_da_to_va(struct omap_iommu *obj, u32 da);
#endif /* __IOMMU_MMAP_H */

3
arch/ia64/kvm/kvm-ia64.c
View File

@ -33,6 +33,7 @@
#include <linux/uaccess.h>
#include <linux/iommu.h>
#include <linux/intel-iommu.h>
#include <linux/pci.h>
#include <asm/pgtable.h>
#include <asm/gcc_intrin.h>
@ -204,7 +205,7 @@ int kvm_dev_ioctl_check_extension(long ext)
r = KVM_COALESCED_MMIO_PAGE_OFFSET;
break;
case KVM_CAP_IOMMU:
r = iommu_found();
r = iommu_present(&pci_bus_type);
break;
default:
r = 0;

3
arch/x86/kvm/x86.c
View File

@ -44,6 +44,7 @@
#include <linux/perf_event.h>
#include <linux/uaccess.h>
#include <linux/hash.h>
#include <linux/pci.h>
#include <trace/events/kvm.h>
#define CREATE_TRACE_POINTS
@ -2095,7 +2096,7 @@ int kvm_dev_ioctl_check_extension(long ext)
r = 0;
break;
case KVM_CAP_IOMMU:
r = iommu_found();
r = iommu_present(&pci_bus_type);
break;
case KVM_CAP_MCE:
r = KVM_MAX_MCE_BANKS;

19
drivers/iommu/Kconfig
View File

@ -107,4 +107,23 @@ config INTR_REMAP
To use x2apic mode in the CPU's which support x2APIC enhancements or
to support platforms with CPU's having > 8 bit APIC ID, say Y.
# OMAP IOMMU support
config OMAP_IOMMU
bool "OMAP IOMMU Support"
depends on ARCH_OMAP
select IOMMU_API
config OMAP_IOVMM
tristate "OMAP IO Virtual Memory Manager Support"
depends on OMAP_IOMMU
config OMAP_IOMMU_DEBUG
tristate "Export OMAP IOMMU/IOVMM internals in DebugFS"
depends on OMAP_IOVMM && DEBUG_FS
help
Select this to see extensive information about
the internal state of OMAP IOMMU/IOVMM in debugfs.
Say N unless you know you need this.
endif # IOMMU_SUPPORT

3
drivers/iommu/Makefile
View File

@ -3,3 +3,6 @@ obj-$(CONFIG_MSM_IOMMU) += msm_iommu.o msm_iommu_dev.o
obj-$(CONFIG_AMD_IOMMU) += amd_iommu.o amd_iommu_init.o
obj-$(CONFIG_DMAR) += dmar.o iova.o intel-iommu.o
obj-$(CONFIG_INTR_REMAP) += dmar.o intr_remapping.o
obj-$(CONFIG_OMAP_IOMMU) += omap-iommu.o
obj-$(CONFIG_OMAP_IOVMM) += omap-iovmm.o
obj-$(CONFIG_OMAP_IOMMU_DEBUG) += omap-iommu-debug.o

4
drivers/iommu/amd_iommu.c
View File

@ -1283,7 +1283,7 @@ static int alloc_new_range(struct dma_ops_domain *dma_dom,
if (!pte || !IOMMU_PTE_PRESENT(*pte))
continue;
dma_ops_reserve_addresses(dma_dom, i << PAGE_SHIFT, 1);
dma_ops_reserve_addresses(dma_dom, i >> PAGE_SHIFT, 1);
}
update_domain(&dma_dom->domain);
@ -2495,7 +2495,7 @@ static unsigned device_dma_ops_init(void)
void __init amd_iommu_init_api(void)
{
register_iommu(&amd_iommu_ops);
bus_set_iommu(&pci_bus_type, &amd_iommu_ops);
}
int __init amd_iommu_init_dma_ops(void)

2
drivers/iommu/intel-iommu.c
View File

@ -3486,7 +3486,7 @@ int __init intel_iommu_init(void)
init_iommu_pm_ops();
register_iommu(&intel_iommu_ops);
bus_set_iommu(&pci_bus_type, &intel_iommu_ops);
bus_register_notifier(&pci_bus_type, &device_nb);

120
drivers/iommu/iommu.c
View File

@ -16,6 +16,8 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/bug.h>
#include <linux/types.h>
#include <linux/module.h>
@ -23,32 +25,78 @@
#include <linux/errno.h>
#include <linux/iommu.h>
static struct iommu_ops *iommu_ops;
void register_iommu(struct iommu_ops *ops)
static void iommu_bus_init(struct bus_type *bus, struct iommu_ops *ops)
{
if (iommu_ops)
BUG();
iommu_ops = ops;
}
bool iommu_found(void)
/**
* bus_set_iommu - set iommu-callbacks for the bus
* @bus: bus.
* @ops: the callbacks provided by the iommu-driver
*
* This function is called by an iommu driver to set the iommu methods
* used for a particular bus. Drivers for devices on that bus can use
* the iommu-api after these ops are registered.
* This special function is needed because IOMMUs are usually devices on
* the bus itself, so the iommu drivers are not initialized when the bus
* is set up. With this function the iommu-driver can set the iommu-ops
* afterwards.
*/
int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops)
{
return iommu_ops != NULL;
}
EXPORT_SYMBOL_GPL(iommu_found);
if (bus->iommu_ops != NULL)
return -EBUSY;
struct iommu_domain *iommu_domain_alloc(void)
bus->iommu_ops = ops;
/* Do IOMMU specific setup for this bus-type */
iommu_bus_init(bus, ops);
return 0;
}
EXPORT_SYMBOL_GPL(bus_set_iommu);
bool iommu_present(struct bus_type *bus)
{
return bus->iommu_ops != NULL;
}
EXPORT_SYMBOL_GPL(iommu_present);
/**
* iommu_set_fault_handler() - set a fault handler for an iommu domain
* @domain: iommu domain
* @handler: fault handler
*
* This function should be used by IOMMU users which want to be notified
* whenever an IOMMU fault happens.
*
* The fault handler itself should return 0 on success, and an appropriate
* error code otherwise.
*/
void iommu_set_fault_handler(struct iommu_domain *domain,
iommu_fault_handler_t handler)
{
BUG_ON(!domain);
domain->handler = handler;
}
EXPORT_SYMBOL_GPL(iommu_set_fault_handler);
struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
{
struct iommu_domain *domain;
int ret;
if (bus == NULL || bus->iommu_ops == NULL)
return NULL;
domain = kmalloc(sizeof(*domain), GFP_KERNEL);
if (!domain)
return NULL;
ret = iommu_ops->domain_init(domain);
domain->ops = bus->iommu_ops;
ret = domain->ops->domain_init(domain);
if (ret)
goto out_free;
@ -63,62 +111,78 @@ EXPORT_SYMBOL_GPL(iommu_domain_alloc);
void iommu_domain_free(struct iommu_domain *domain)
{
iommu_ops->domain_destroy(domain);
if (likely(domain->ops->domain_destroy != NULL))
domain->ops->domain_destroy(domain);
kfree(domain);
}
EXPORT_SYMBOL_GPL(iommu_domain_free);
int iommu_attach_device(struct iommu_domain *domain, struct device *dev)
{
return iommu_ops->attach_dev(domain, dev);
if (unlikely(domain->ops->attach_dev == NULL))
return -ENODEV;
return domain->ops->attach_dev(domain, dev);
}
EXPORT_SYMBOL_GPL(iommu_attach_device);
void iommu_detach_device(struct iommu_domain *domain, struct device *dev)
{
iommu_ops->detach_dev(domain, dev);
if (unlikely(domain->ops->detach_dev == NULL))
return;
domain->ops->detach_dev(domain, dev);
}
EXPORT_SYMBOL_GPL(iommu_detach_device);
phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
unsigned long iova)
{
return iommu_ops->iova_to_phys(domain, iova);
if (unlikely(domain->ops->iova_to_phys == NULL))
return 0;
return domain->ops->iova_to_phys(domain, iova);
}
EXPORT_SYMBOL_GPL(iommu_iova_to_phys);
int iommu_domain_has_cap(struct iommu_domain *domain,
unsigned long cap)
{
return iommu_ops->domain_has_cap(domain, cap);
if (unlikely(domain->ops->domain_has_cap == NULL))
return 0;
return domain->ops->domain_has_cap(domain, cap);
}
EXPORT_SYMBOL_GPL(iommu_domain_has_cap);
int iommu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, int gfp_order, int prot)
{
unsigned long invalid_mask;
size_t size;
size = 0x1000UL << gfp_order;
invalid_mask = size - 1;
if (unlikely(domain->ops->map == NULL))
return -ENODEV;
BUG_ON((iova | paddr) & invalid_mask);
size = PAGE_SIZE << gfp_order;
return iommu_ops->map(domain, iova, paddr, gfp_order, prot);
BUG_ON(!IS_ALIGNED(iova | paddr, size));
return domain->ops->map(domain, iova, paddr, gfp_order, prot);
}
EXPORT_SYMBOL_GPL(iommu_map);
int iommu_unmap(struct iommu_domain *domain, unsigned long iova, int gfp_order)
{
unsigned long invalid_mask;
size_t size;
size = 0x1000UL << gfp_order;
invalid_mask = size - 1;
if (unlikely(domain->ops->unmap == NULL))
return -ENODEV;
BUG_ON(iova & invalid_mask);
size = PAGE_SIZE << gfp_order;
return iommu_ops->unmap(domain, iova, gfp_order);
BUG_ON(!IS_ALIGNED(iova, size));
return domain->ops->unmap(domain, iova, gfp_order);
}
EXPORT_SYMBOL_GPL(iommu_unmap);

9
drivers/iommu/msm_iommu.c
View File

@ -543,6 +543,13 @@ static int msm_iommu_unmap(struct iommu_domain *domain, unsigned long va,
}
ret = __flush_iotlb(domain);
/*
* the IOMMU API requires us to return the order of the unmapped
* page (on success).
*/
if (!ret)
ret = order;
fail:
spin_unlock_irqrestore(&msm_iommu_lock, flags);
return ret;
@ -721,7 +728,7 @@ static void __init setup_iommu_tex_classes(void)
static int __init msm_iommu_init(void)
{
setup_iommu_tex_classes();
register_iommu(&msm_iommu_ops);
bus_set_iommu(&platform_bus_type, &msm_iommu_ops);
return 0;
}

36
arch/arm/plat-omap/iommu-debug.c → drivers/iommu/omap-iommu-debug.c
View File

@ -21,7 +21,7 @@
#include <plat/iommu.h>
#include <plat/iovmm.h>
#include "iopgtable.h"
#include <plat/iopgtable.h>
#define MAXCOLUMN 100 /* for short messages */
@ -32,7 +32,7 @@ static struct dentry *iommu_debug_root;
static ssize_t debug_read_ver(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
u32 ver = iommu_arch_version();
u32 ver = omap_iommu_arch_version();
char buf[MAXCOLUMN], *p = buf;
p += sprintf(p, "H/W version: %d.%d\n", (ver >> 4) & 0xf , ver & 0xf);
@ -43,7 +43,7 @@ static ssize_t debug_read_ver(struct file *file, char __user *userbuf,
static ssize_t debug_read_regs(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
struct iommu *obj = file->private_data;
struct omap_iommu *obj = file->private_data;
char *p, *buf;
ssize_t bytes;
@ -54,7 +54,7 @@ static ssize_t debug_read_regs(struct file *file, char __user *userbuf,
mutex_lock(&iommu_debug_lock);
bytes = iommu_dump_ctx(obj, p, count);
bytes = omap_iommu_dump_ctx(obj, p, count);
bytes = simple_read_from_buffer(userbuf, count, ppos, buf, bytes);
mutex_unlock(&iommu_debug_lock);
@ -66,7 +66,7 @@ static ssize_t debug_read_regs(struct file *file, char __user *userbuf,
static ssize_t debug_read_tlb(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
struct iommu *obj = file->private_data;
struct omap_iommu *obj = file->private_data;
char *p, *buf;
ssize_t bytes, rest;
@ -80,7 +80,7 @@ static ssize_t debug_read_tlb(struct file *file, char __user *userbuf,
p += sprintf(p, "%8s %8s\n", "cam:", "ram:");
p += sprintf(p, "-----------------------------------------\n");
rest = count - (p - buf);
p += dump_tlb_entries(obj, p, rest);
p += omap_dump_tlb_entries(obj, p, rest);
bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
@ -96,7 +96,7 @@ static ssize_t debug_write_pagetable(struct file *file,
struct iotlb_entry e;
struct cr_regs cr;
int err;
struct iommu *obj = file->private_data;
struct omap_iommu *obj = file->private_data;
char buf[MAXCOLUMN], *p = buf;
count = min(count, sizeof(buf));
@ -113,8 +113,8 @@ static ssize_t debug_write_pagetable(struct file *file,
return -EINVAL;
}
iotlb_cr_to_e(&cr, &e);
err = iopgtable_store_entry(obj, &e);
omap_iotlb_cr_to_e(&cr, &e);
err = omap_iopgtable_store_entry(obj, &e);
if (err)
dev_err(obj->dev, "%s: fail to store cr\n", __func__);
@ -136,7 +136,7 @@ static ssize_t debug_write_pagetable(struct file *file,
__err; \
})
static ssize_t dump_ioptable(struct iommu *obj, char *buf, ssize_t len)
static ssize_t dump_ioptable(struct omap_iommu *obj, char *buf, ssize_t len)
{
int i;
u32 *iopgd;
@ -183,7 +183,7 @@ out:
static ssize_t debug_read_pagetable(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
struct iommu *obj = file->private_data;
struct omap_iommu *obj = file->private_data;
char *p, *buf;
size_t bytes;
@ -211,7 +211,7 @@ static ssize_t debug_read_pagetable(struct file *file, char __user *userbuf,
static ssize_t debug_read_mmap(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
struct iommu *obj = file->private_data;
struct omap_iommu *obj = file->private_data;
char *p, *buf;
struct iovm_struct *tmp;
int uninitialized_var(i);
@ -253,7 +253,7 @@ static ssize_t debug_read_mmap(struct file *file, char __user *userbuf,
static ssize_t debug_read_mem(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
{
struct iommu *obj = file->private_data;
struct omap_iommu *obj = file->private_data;
char *p, *buf;
struct iovm_struct *area;
ssize_t bytes;
@ -267,7 +267,7 @@ static ssize_t debug_read_mem(struct file *file, char __user *userbuf,
mutex_lock(&iommu_debug_lock);
area = find_iovm_area(obj, (u32)ppos);
area = omap_find_iovm_area(obj, (u32)ppos);
if (IS_ERR(area)) {
bytes = -EINVAL;
goto err_out;
@ -286,7 +286,7 @@ err_out:
static ssize_t debug_write_mem(struct file *file, const char __user *userbuf,
size_t count, loff_t *ppos)
{
struct iommu *obj = file->private_data;
struct omap_iommu *obj = file->private_data;
struct iovm_struct *area;
char *p, *buf;
@ -304,7 +304,7 @@ static ssize_t debug_write_mem(struct file *file, const char __user *userbuf,
goto err_out;
}
area = find_iovm_area(obj, (u32)ppos);
area = omap_find_iovm_area(obj, (u32)ppos);
if (IS_ERR(area)) {
count = -EINVAL;
goto err_out;
@ -360,7 +360,7 @@ DEBUG_FOPS(mem);
static int iommu_debug_register(struct device *dev, void *data)
{
struct platform_device *pdev = to_platform_device(dev);
struct iommu *obj = platform_get_drvdata(pdev);
struct omap_iommu *obj = platform_get_drvdata(pdev);
struct dentry *d, *parent;
if (!obj || !obj->dev)
@ -396,7 +396,7 @@ static int __init iommu_debug_init(void)
return -ENOMEM;
iommu_debug_root = d;
err = foreach_iommu_device(d, iommu_debug_register);
err = omap_foreach_iommu_device(d, iommu_debug_register);
if (err)
goto err_out;
return 0;

529
arch/arm/plat-omap/iommu.c → drivers/iommu/omap-iommu.c
View File

@ -18,18 +18,34 @@
#include <linux/ioport.h>
#include <linux/clk.h>
#include <linux/platform_device.h>
#include <linux/iommu.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <asm/cacheflush.h>
#include <plat/iommu.h>
#include "iopgtable.h"
#include <plat/iopgtable.h>
#define for_each_iotlb_cr(obj, n, __i, cr) \
for (__i = 0; \
(__i < (n)) && (cr = __iotlb_read_cr((obj), __i), true); \
__i++)
/**
* struct omap_iommu_domain - omap iommu domain
* @pgtable: the page table
* @iommu_dev: an omap iommu device attached to this domain. only a single
* iommu device can be attached for now.
* @lock: domain lock, should be taken when attaching/detaching
*/
struct omap_iommu_domain {
u32 *pgtable;
struct omap_iommu *iommu_dev;
spinlock_t lock;
};
/* accommodate the difference between omap1 and omap2/3 */
static const struct iommu_functions *arch_iommu;
@ -37,13 +53,13 @@ static struct platform_driver omap_iommu_driver;
static struct kmem_cache *iopte_cachep;
/**
* install_iommu_arch - Install archtecure specific iommu functions
* omap_install_iommu_arch - Install archtecure specific iommu functions
* @ops: a pointer to architecture specific iommu functions
*
* There are several kind of iommu algorithm(tlb, pagetable) among
* omap series. This interface installs such an iommu algorighm.
**/
int install_iommu_arch(const struct iommu_functions *ops)
int omap_install_iommu_arch(const struct iommu_functions *ops)
{
if (arch_iommu)
return -EBUSY;
@ -51,53 +67,53 @@ int install_iommu_arch(const struct iommu_functions *ops)
arch_iommu = ops;
return 0;
}
EXPORT_SYMBOL_GPL(install_iommu_arch);
EXPORT_SYMBOL_GPL(omap_install_iommu_arch);
/**
* uninstall_iommu_arch - Uninstall archtecure specific iommu functions
* omap_uninstall_iommu_arch - Uninstall archtecure specific iommu functions
* @ops: a pointer to architecture specific iommu functions
*
* This interface uninstalls the iommu algorighm installed previously.
**/
void uninstall_iommu_arch(const struct iommu_functions *ops)
void omap_uninstall_iommu_arch(const struct iommu_functions *ops)
{
if (arch_iommu != ops)
pr_err("%s: not your arch\n", __func__);
arch_iommu = NULL;
}
EXPORT_SYMBOL_GPL(uninstall_iommu_arch);
EXPORT_SYMBOL_GPL(omap_uninstall_iommu_arch);
/**
* iommu_save_ctx - Save registers for pm off-mode support
* omap_iommu_save_ctx - Save registers for pm off-mode support
* @obj: target iommu
**/
void iommu_save_ctx(struct iommu *obj)
void omap_iommu_save_ctx(struct omap_iommu *obj)
{
arch_iommu->save_ctx(obj);
}
EXPORT_SYMBOL_GPL(iommu_save_ctx);
EXPORT_SYMBOL_GPL(omap_iommu_save_ctx);
/**
* iommu_restore_ctx - Restore registers for pm off-mode support
* omap_iommu_restore_ctx - Restore registers for pm off-mode support
* @obj: target iommu
**/
void iommu_restore_ctx(struct iommu *obj)
void omap_iommu_restore_ctx(struct omap_iommu *obj)
{
arch_iommu->restore_ctx(obj);
}
EXPORT_SYMBOL_GPL(iommu_restore_ctx);
EXPORT_SYMBOL_GPL(omap_iommu_restore_ctx);
/**
* iommu_arch_version - Return running iommu arch version
* omap_iommu_arch_version - Return running iommu arch version
**/
u32 iommu_arch_version(void)
u32 omap_iommu_arch_version(void)
{
return arch_iommu->version;
}
EXPORT_SYMBOL_GPL(iommu_arch_version);
EXPORT_SYMBOL_GPL(omap_iommu_arch_version);
static int iommu_enable(struct iommu *obj)
static int iommu_enable(struct omap_iommu *obj)
{
int err;
@ -115,7 +131,7 @@ static int iommu_enable(struct iommu *obj)
return err;
}
static void iommu_disable(struct iommu *obj)
static void iommu_disable(struct omap_iommu *obj)
{
if (!obj)
return;
@ -130,13 +146,13 @@ static void iommu_disable(struct iommu *obj)
/*
* TLB operations
*/
void iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e)
void omap_iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e)
{
BUG_ON(!cr || !e);
arch_iommu->cr_to_e(cr, e);
}
EXPORT_SYMBOL_GPL(iotlb_cr_to_e);
EXPORT_SYMBOL_GPL(omap_iotlb_cr_to_e);
static inline int iotlb_cr_valid(struct cr_regs *cr)
{
@ -146,7 +162,7 @@ static inline int iotlb_cr_valid(struct cr_regs *cr)
return arch_iommu->cr_valid(cr);
}
static inline struct cr_regs *iotlb_alloc_cr(struct iommu *obj,
static inline struct cr_regs *iotlb_alloc_cr(struct omap_iommu *obj,
struct iotlb_entry *e)
{
if (!e)
@ -155,23 +171,22 @@ static inline struct cr_regs *iotlb_alloc_cr(struct iommu *obj,
return arch_iommu->alloc_cr(obj, e);
}
u32 iotlb_cr_to_virt(struct cr_regs *cr)
static u32 iotlb_cr_to_virt(struct cr_regs *cr)
{
return arch_iommu->cr_to_virt(cr);
}
EXPORT_SYMBOL_GPL(iotlb_cr_to_virt);
static u32 get_iopte_attr(struct iotlb_entry *e)
{
return arch_iommu->get_pte_attr(e);
}
static u32 iommu_report_fault(struct iommu *obj, u32 *da)
static u32 iommu_report_fault(struct omap_iommu *obj, u32 *da)
{
return arch_iommu->fault_isr(obj, da);
}
static void iotlb_lock_get(struct iommu *obj, struct iotlb_lock *l)
static void iotlb_lock_get(struct omap_iommu *obj, struct iotlb_lock *l)
{
u32 val;
@ -182,7 +197,7 @@ static void iotlb_lock_get(struct iommu *obj, struct iotlb_lock *l)
}
static void iotlb_lock_set(struct iommu *obj, struct iotlb_lock *l)
static void iotlb_lock_set(struct omap_iommu *obj, struct iotlb_lock *l)
{
u32 val;
@ -192,12 +207,12 @@ static void iotlb_lock_set(struct iommu *obj, struct iotlb_lock *l)
iommu_write_reg(obj, val, MMU_LOCK);
}
static void iotlb_read_cr(struct iommu *obj, struct cr_regs *cr)
static void iotlb_read_cr(struct omap_iommu *obj, struct cr_regs *cr)
{
arch_iommu->tlb_read_cr(obj, cr);
}
static void iotlb_load_cr(struct iommu *obj, struct cr_regs *cr)
static void iotlb_load_cr(struct omap_iommu *obj, struct cr_regs *cr)
{
arch_iommu->tlb_load_cr(obj, cr);
@ -211,7 +226,7 @@ static void iotlb_load_cr(struct iommu *obj, struct cr_regs *cr)
* @cr: contents of cam and ram register
* @buf: output buffer
**/
static inline ssize_t iotlb_dump_cr(struct iommu *obj, struct cr_regs *cr,
static inline ssize_t iotlb_dump_cr(struct omap_iommu *obj, struct cr_regs *cr,
char *buf)
{
BUG_ON(!cr || !buf);
@ -220,7 +235,7 @@ static inline ssize_t iotlb_dump_cr(struct iommu *obj, struct cr_regs *cr,
}
/* only used in iotlb iteration for-loop */
static struct cr_regs __iotlb_read_cr(struct iommu *obj, int n)
static struct cr_regs __iotlb_read_cr(struct omap_iommu *obj, int n)
{
struct cr_regs cr;
struct iotlb_lock l;
@ -238,7 +253,8 @@ static struct cr_regs __iotlb_read_cr(struct iommu *obj, int n)
* @obj: target iommu
* @e: an iommu tlb entry info
**/
int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e)
#ifdef PREFETCH_IOTLB
static int load_iotlb_entry(struct omap_iommu *obj, struct iotlb_entry *e)
{
int err = 0;
struct iotlb_lock l;
@ -294,7 +310,20 @@ out:
clk_disable(obj->clk);
return err;
}
EXPORT_SYMBOL_GPL(load_iotlb_entry);
#else /* !PREFETCH_IOTLB */
static int load_iotlb_entry(struct omap_iommu *obj, struct iotlb_entry *e)
{
return 0;
}
#endif /* !PREFETCH_IOTLB */
static int prefetch_iotlb_entry(struct omap_iommu *obj, struct iotlb_entry *e)
{
return load_iotlb_entry(obj, e);
}
/**
* flush_iotlb_page - Clear an iommu tlb entry
@ -303,7 +332,7 @@ EXPORT_SYMBOL_GPL(load_iotlb_entry);
*
* Clear an iommu tlb entry which includes 'da' address.
**/
void flush_iotlb_page(struct iommu *obj, u32 da)
static void flush_iotlb_page(struct omap_iommu *obj, u32 da)
{
int i;
struct cr_regs cr;
@ -332,33 +361,12 @@ void flush_iotlb_page(struct iommu *obj, u32 da)
if (i == obj->nr_tlb_entries)
dev_dbg(obj->dev, "%s: no page for %08x\n", __func__, da);
}
EXPORT_SYMBOL_GPL(flush_iotlb_page);
/**
* flush_iotlb_range - Clear an iommu tlb entries
* @obj: target iommu
* @start: iommu device virtual address(start)
* @end: iommu device virtual address(end)
*
* Clear an iommu tlb entry which includes 'da' address.
**/
void flush_iotlb_range(struct iommu *obj, u32 start, u32 end)
{
u32 da = start;
while (da < end) {
flush_iotlb_page(obj, da);
/* FIXME: Optimize for multiple page size */
da += IOPTE_SIZE;
}
}
EXPORT_SYMBOL_GPL(flush_iotlb_range);
/**
* flush_iotlb_all - Clear all iommu tlb entries
* @obj: target iommu
**/
void flush_iotlb_all(struct iommu *obj)
static void flush_iotlb_all(struct omap_iommu *obj)
{
struct iotlb_lock l;
@ -372,28 +380,10 @@ void flush_iotlb_all(struct iommu *obj)
clk_disable(obj->clk);
}
EXPORT_SYMBOL_GPL(flush_iotlb_all);
/**
* iommu_set_twl - enable/disable table walking logic
* @obj: target iommu
* @on: enable/disable
*
* Function used to enable/disable TWL. If one wants to work
* exclusively with locked TLB entries and receive notifications
* for TLB miss then call this function to disable TWL.
*/
void iommu_set_twl(struct iommu *obj, bool on)
{
clk_enable(obj->clk);
arch_iommu->set_twl(obj, on);
clk_disable(obj->clk);
}
EXPORT_SYMBOL_GPL(iommu_set_twl);
#if defined(CONFIG_OMAP_IOMMU_DEBUG) || defined(CONFIG_OMAP_IOMMU_DEBUG_MODULE)
#if defined(CONFIG_OMAP_IOMMU_DEBUG_MODULE)
ssize_t iommu_dump_ctx(struct iommu *obj, char *buf, ssize_t bytes)
ssize_t omap_iommu_dump_ctx(struct omap_iommu *obj, char *buf, ssize_t bytes)
{
if (!obj || !buf)
return -EINVAL;
@ -406,9 +396,10 @@ ssize_t iommu_dump_ctx(struct iommu *obj, char *buf, ssize_t bytes)
return bytes;
}
EXPORT_SYMBOL_GPL(iommu_dump_ctx);
EXPORT_SYMBOL_GPL(omap_iommu_dump_ctx);
static int __dump_tlb_entries(struct iommu *obj, struct cr_regs *crs, int num)
static int
__dump_tlb_entries(struct omap_iommu *obj, struct cr_regs *crs, int num)
{
int i;
struct iotlb_lock saved;
@ -431,11 +422,11 @@ static int __dump_tlb_entries(struct iommu *obj, struct cr_regs *crs, int num)
}
/**
* dump_tlb_entries - dump cr arrays to given buffer
* omap_dump_tlb_entries - dump cr arrays to given buffer
* @obj: target iommu
* @buf: output buffer
**/
size_t dump_tlb_entries(struct iommu *obj, char *buf, ssize_t bytes)
size_t omap_dump_tlb_entries(struct omap_iommu *obj, char *buf, ssize_t bytes)
{
int i, num;
struct cr_regs *cr;
@ -455,14 +446,14 @@ size_t dump_tlb_entries(struct iommu *obj, char *buf, ssize_t bytes)
return p - buf;
}
EXPORT_SYMBOL_GPL(dump_tlb_entries);
EXPORT_SYMBOL_GPL(omap_dump_tlb_entries);
int foreach_iommu_device(void *data, int (*fn)(struct device *, void *))
int omap_foreach_iommu_device(void *data, int (*fn)(struct device *, void *))
{
return driver_for_each_device(&omap_iommu_driver.driver,
NULL, data, fn);
}
EXPORT_SYMBOL_GPL(foreach_iommu_device);
EXPORT_SYMBOL_GPL(omap_foreach_iommu_device);
#endif /* CONFIG_OMAP_IOMMU_DEBUG_MODULE */
@ -495,7 +486,7 @@ static void iopte_free(u32 *iopte)
kmem_cache_free(iopte_cachep, iopte);
}
static u32 *iopte_alloc(struct iommu *obj, u32 *iopgd, u32 da)
static u32 *iopte_alloc(struct omap_iommu *obj, u32 *iopgd, u32 da)
{
u32 *iopte;
@ -533,7 +524,7 @@ pte_ready:
return iopte;
}
static int iopgd_alloc_section(struct iommu *obj, u32 da, u32 pa, u32 prot)
static int iopgd_alloc_section(struct omap_iommu *obj, u32 da, u32 pa, u32 prot)
{
u32 *iopgd = iopgd_offset(obj, da);
@ -548,7 +539,7 @@ static int iopgd_alloc_section(struct iommu *obj, u32 da, u32 pa, u32 prot)
return 0;
}
static int iopgd_alloc_super(struct iommu *obj, u32 da, u32 pa, u32 prot)
static int iopgd_alloc_super(struct omap_iommu *obj, u32 da, u32 pa, u32 prot)
{
u32 *iopgd = iopgd_offset(obj, da);
int i;
@ -565,7 +556,7 @@ static int iopgd_alloc_super(struct iommu *obj, u32 da, u32 pa, u32 prot)
return 0;
}
static int iopte_alloc_page(struct iommu *obj, u32 da, u32 pa, u32 prot)
static int iopte_alloc_page(struct omap_iommu *obj, u32 da, u32 pa, u32 prot)
{
u32 *iopgd = iopgd_offset(obj, da);
u32 *iopte = iopte_alloc(obj, iopgd, da);
@ -582,7 +573,7 @@ static int iopte_alloc_page(struct iommu *obj, u32 da, u32 pa, u32 prot)
return 0;
}
static int iopte_alloc_large(struct iommu *obj, u32 da, u32 pa, u32 prot)
static int iopte_alloc_large(struct omap_iommu *obj, u32 da, u32 pa, u32 prot)
{
u32 *iopgd = iopgd_offset(obj, da);
u32 *iopte = iopte_alloc(obj, iopgd, da);
@ -603,9 +594,10 @@ static int iopte_alloc_large(struct iommu *obj, u32 da, u32 pa, u32 prot)
return 0;
}
static int iopgtable_store_entry_core(struct iommu *obj, struct iotlb_entry *e)
static int
iopgtable_store_entry_core(struct omap_iommu *obj, struct iotlb_entry *e)
{
int (*fn)(struct iommu *, u32, u32, u32);
int (*fn)(struct omap_iommu *, u32, u32, u32);
u32 prot;
int err;
@ -641,23 +633,21 @@ static int iopgtable_store_entry_core(struct iommu *obj, struct iotlb_entry *e)
}
/**
* iopgtable_store_entry - Make an iommu pte entry
* omap_iopgtable_store_entry - Make an iommu pte entry
* @obj: target iommu
* @e: an iommu tlb entry info
**/
int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e)
int omap_iopgtable_store_entry(struct omap_iommu *obj, struct iotlb_entry *e)
{
int err;
flush_iotlb_page(obj, e->da);
err = iopgtable_store_entry_core(obj, e);
#ifdef PREFETCH_IOTLB
if (!err)
load_iotlb_entry(obj, e);
#endif
prefetch_iotlb_entry(obj, e);
return err;
}
EXPORT_SYMBOL_GPL(iopgtable_store_entry);
EXPORT_SYMBOL_GPL(omap_iopgtable_store_entry);
/**
* iopgtable_lookup_entry - Lookup an iommu pte entry
@ -666,7 +656,8 @@ EXPORT_SYMBOL_GPL(iopgtable_store_entry);
* @ppgd: iommu pgd entry pointer to be returned
* @ppte: iommu pte entry pointer to be returned
**/
void iopgtable_lookup_entry(struct iommu *obj, u32 da, u32 **ppgd, u32 **ppte)
static void
iopgtable_lookup_entry(struct omap_iommu *obj, u32 da, u32 **ppgd, u32 **ppte)
{
u32 *iopgd, *iopte = NULL;
@ -680,9 +671,8 @@ out:
*ppgd = iopgd;
*ppte = iopte;
}
EXPORT_SYMBOL_GPL(iopgtable_lookup_entry);
static size_t iopgtable_clear_entry_core(struct iommu *obj, u32 da)
static size_t iopgtable_clear_entry_core(struct omap_iommu *obj, u32 da)
{
size_t bytes;
u32 *iopgd = iopgd_offset(obj, da);
@ -735,7 +725,7 @@ out:
* @obj: target iommu
* @da: iommu device virtual address
**/
size_t iopgtable_clear_entry(struct iommu *obj, u32 da)
static size_t iopgtable_clear_entry(struct omap_iommu *obj, u32 da)
{
size_t bytes;
@ -748,9 +738,8 @@ size_t iopgtable_clear_entry(struct iommu *obj, u32 da)
return bytes;
}
EXPORT_SYMBOL_GPL(iopgtable_clear_entry);
static void iopgtable_clear_entry_all(struct iommu *obj)
static void iopgtable_clear_entry_all(struct omap_iommu *obj)
{
int i;
@ -785,7 +774,8 @@ static irqreturn_t iommu_fault_handler(int irq, void *data)
{
u32 da, errs;
u32 *iopgd, *iopte;
struct iommu *obj = data;
struct omap_iommu *obj = data;
struct iommu_domain *domain = obj->domain;
if (!obj->refcount)
return IRQ_NONE;
@ -797,7 +787,7 @@ static irqreturn_t iommu_fault_handler(int irq, void *data)
return IRQ_HANDLED;
/* Fault callback or TLB/PTE Dynamic loading */
if (obj->isr && !obj->isr(obj, da, errs, obj->isr_priv))
if (!report_iommu_fault(domain, obj->dev, da, 0))
return IRQ_HANDLED;
iommu_disable(obj);
@ -821,7 +811,7 @@ static irqreturn_t iommu_fault_handler(int irq, void *data)
static int device_match_by_alias(struct device *dev, void *data)
{
struct iommu *obj = to_iommu(dev);
struct omap_iommu *obj = to_iommu(dev);
const char *name = data;
pr_debug("%s: %s %s\n", __func__, obj->name, name);
@ -830,57 +820,55 @@ static int device_match_by_alias(struct device *dev, void *data)
}
/**
* iommu_set_da_range - Set a valid device address range
* @obj: target iommu
* @start Start of valid range
* @end End of valid range
**/
int iommu_set_da_range(struct iommu *obj, u32 start, u32 end)
* omap_find_iommu_device() - find an omap iommu device by name
* @name: name of the iommu device
*
* The generic iommu API requires the caller to provide the device
* he wishes to attach to a certain iommu domain.
*
* Drivers generally should not bother with this as it should just
* be taken care of by the DMA-API using dev_archdata.
*
* This function is provided as an interim solution until the latter
* materializes, and omap3isp is fully migrated to the DMA-API.
*/
struct device *omap_find_iommu_device(const char *name)
{
if (!obj)
return -EFAULT;
if (end < start || !PAGE_ALIGN(start | end))
return -EINVAL;
obj->da_start = start;
obj->da_end = end;
return 0;
return driver_find_device(&omap_iommu_driver.driver, NULL,
(void *)name,
device_match_by_alias);
}
EXPORT_SYMBOL_GPL(iommu_set_da_range);
EXPORT_SYMBOL_GPL(omap_find_iommu_device);
/**
* iommu_get - Get iommu handler
* @name: target iommu name
* omap_iommu_attach() - attach iommu device to an iommu domain
* @dev: target omap iommu device
* @iopgd: page table
**/
struct iommu *iommu_get(const char *name)
static struct omap_iommu *omap_iommu_attach(struct device *dev, u32 *iopgd)
{
int err = -ENOMEM;
struct device *dev;
struct iommu *obj;
struct omap_iommu *obj = to_iommu(dev);
dev = driver_find_device(&omap_iommu_driver.driver, NULL, (void *)name,
device_match_by_alias);
if (!dev)
return ERR_PTR(-ENODEV);
spin_lock(&obj->iommu_lock);
obj = to_iommu(dev);
mutex_lock(&obj->iommu_lock);
if (obj->refcount++ == 0) {
err = iommu_enable(obj);
if (err)
goto err_enable;
flush_iotlb_all(obj);
/* an iommu device can only be attached once */
if (++obj->refcount > 1) {
dev_err(dev, "%s: already attached!\n", obj->name);
err = -EBUSY;
goto err_enable;
}
obj->iopgd = iopgd;
err = iommu_enable(obj);
if (err)
goto err_enable;
flush_iotlb_all(obj);
if (!try_module_get(obj->owner))
goto err_module;
mutex_unlock(&obj->iommu_lock);
spin_unlock(&obj->iommu_lock);
dev_dbg(obj->dev, "%s: %s\n", __func__, obj->name);
return obj;
@ -890,59 +878,32 @@ err_module:
iommu_disable(obj);
err_enable:
obj->refcount--;
mutex_unlock(&obj->iommu_lock);
spin_unlock(&obj->iommu_lock);
return ERR_PTR(err);
}
EXPORT_SYMBOL_GPL(iommu_get);
/**
* iommu_put - Put back iommu handler
* omap_iommu_detach - release iommu device
* @obj: target iommu
**/
void iommu_put(struct iommu *obj)
static void omap_iommu_detach(struct omap_iommu *obj)
{
if (!obj || IS_ERR(obj))
return;
mutex_lock(&obj->iommu_lock);
spin_lock(&obj->iommu_lock);
if (--obj->refcount == 0)
iommu_disable(obj);
module_put(obj->owner);
mutex_unlock(&obj->iommu_lock);
obj->iopgd = NULL;
spin_unlock(&obj->iommu_lock);
dev_dbg(obj->dev, "%s: %s\n", __func__, obj->name);
}
EXPORT_SYMBOL_GPL(iommu_put);
int iommu_set_isr(const char *name,
int (*isr)(struct iommu *obj, u32 da, u32 iommu_errs,
void *priv),
void *isr_priv)
{
struct device *dev;
struct iommu *obj;
dev = driver_find_device(&omap_iommu_driver.driver, NULL, (void *)name,
device_match_by_alias);
if (!dev)
return -ENODEV;
obj = to_iommu(dev);
mutex_lock(&obj->iommu_lock);
if (obj->refcount != 0) {
mutex_unlock(&obj->iommu_lock);
return -EBUSY;
}
obj->isr = isr;
obj->isr_priv = isr_priv;
mutex_unlock(&obj->iommu_lock);
return 0;
}
EXPORT_SYMBOL_GPL(iommu_set_isr);
/*
* OMAP Device MMU(IOMMU) detection
@ -950,9 +911,8 @@ EXPORT_SYMBOL_GPL(iommu_set_isr);
static int __devinit omap_iommu_probe(struct platform_device *pdev)
{
int err = -ENODEV;
void *p;
int irq;
struct iommu *obj;
struct omap_iommu *obj;
struct resource *res;
struct iommu_platform_data *pdata = pdev->dev.platform_data;
@ -974,7 +934,7 @@ static int __devinit omap_iommu_probe(struct platform_device *pdev)
obj->da_start = pdata->da_start;
obj->da_end = pdata->da_end;
mutex_init(&obj->iommu_lock);
spin_lock_init(&obj->iommu_lock);
mutex_init(&obj->mmap_lock);
spin_lock_init(&obj->page_table_lock);
INIT_LIST_HEAD(&obj->mmap);
@ -1009,22 +969,9 @@ static int __devinit omap_iommu_probe(struct platform_device *pdev)
goto err_irq;
platform_set_drvdata(pdev, obj);
p = (void *)__get_free_pages(GFP_KERNEL, get_order(IOPGD_TABLE_SIZE));
if (!p) {
err = -ENOMEM;
goto err_pgd;
}
memset(p, 0, IOPGD_TABLE_SIZE);
clean_dcache_area(p, IOPGD_TABLE_SIZE);
obj->iopgd = p;
BUG_ON(!IS_ALIGNED((unsigned long)obj->iopgd, IOPGD_TABLE_SIZE));
dev_info(&pdev->dev, "%s registered\n", obj->name);
return 0;
err_pgd:
free_irq(irq, obj);
err_irq:
iounmap(obj->regbase);
err_ioremap:
@ -1040,12 +987,11 @@ static int __devexit omap_iommu_remove(struct platform_device *pdev)
{
int irq;
struct resource *res;
struct iommu *obj = platform_get_drvdata(pdev);
struct omap_iommu *obj = platform_get_drvdata(pdev);
platform_set_drvdata(pdev, NULL);
iopgtable_clear_entry_all(obj);
free_pages((unsigned long)obj->iopgd, get_order(IOPGD_TABLE_SIZE));
irq = platform_get_irq(pdev, 0);
free_irq(irq, obj);
@ -1072,6 +1018,201 @@ static void iopte_cachep_ctor(void *iopte)
clean_dcache_area(iopte, IOPTE_TABLE_SIZE);
}
static int omap_iommu_map(struct iommu_domain *domain, unsigned long da,
phys_addr_t pa, int order, int prot)
{
struct omap_iommu_domain *omap_domain = domain->priv;
struct omap_iommu *oiommu = omap_domain->iommu_dev;
struct device *dev = oiommu->dev;
size_t bytes = PAGE_SIZE << order;
struct iotlb_entry e;
int omap_pgsz;
u32 ret, flags;
/* we only support mapping a single iommu page for now */
omap_pgsz = bytes_to_iopgsz(bytes);
if (omap_pgsz < 0) {
dev_err(dev, "invalid size to map: %d\n", bytes);
return -EINVAL;
}
dev_dbg(dev, "mapping da 0x%lx to pa 0x%x size 0x%x\n", da, pa, bytes);
flags = omap_pgsz | prot;
iotlb_init_entry(&e, da, pa, flags);
ret = omap_iopgtable_store_entry(oiommu, &e);
if (ret)
dev_err(dev, "omap_iopgtable_store_entry failed: %d\n", ret);
return ret;
}
static int omap_iommu_unmap(struct iommu_domain *domain, unsigned long da,
int order)
{
struct omap_iommu_domain *omap_domain = domain->priv;
struct omap_iommu *oiommu = omap_domain->iommu_dev;
struct device *dev = oiommu->dev;
size_t unmap_size;
dev_dbg(dev, "unmapping da 0x%lx order %d\n", da, order);
unmap_size = iopgtable_clear_entry(oiommu, da);
return unmap_size ? get_order(unmap_size) : -EINVAL;
}
static int
omap_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
{
struct omap_iommu_domain *omap_domain = domain->priv;
struct omap_iommu *oiommu;
int ret = 0;
spin_lock(&omap_domain->lock);
/* only a single device is supported per domain for now */
if (omap_domain->iommu_dev) {
dev_err(dev, "iommu domain is already attached\n");
ret = -EBUSY;
goto out;
}
/* get a handle to and enable the omap iommu */
oiommu = omap_iommu_attach(dev, omap_domain->pgtable);
if (IS_ERR(oiommu)) {
ret = PTR_ERR(oiommu);
dev_err(dev, "can't get omap iommu: %d\n", ret);
goto out;
}
omap_domain->iommu_dev = oiommu;
oiommu->domain = domain;
out:
spin_unlock(&omap_domain->lock);
return ret;
}
static void omap_iommu_detach_dev(struct iommu_domain *domain,
struct device *dev)
{
struct omap_iommu_domain *omap_domain = domain->priv;
struct omap_iommu *oiommu = to_iommu(dev);
spin_lock(&omap_domain->lock);
/* only a single device is supported per domain for now */
if (omap_domain->iommu_dev != oiommu) {
dev_err(dev, "invalid iommu device\n");
goto out;
}
iopgtable_clear_entry_all(oiommu);
omap_iommu_detach(oiommu);
omap_domain->iommu_dev = NULL;
out:
spin_unlock(&omap_domain->lock);
}
static int omap_iommu_domain_init(struct iommu_domain *domain)
{
struct omap_iommu_domain *omap_domain;
omap_domain = kzalloc(sizeof(*omap_domain), GFP_KERNEL);
if (!omap_domain) {
pr_err("kzalloc failed\n");
goto out;
}
omap_domain->pgtable = kzalloc(IOPGD_TABLE_SIZE, GFP_KERNEL);
if (!omap_domain->pgtable) {
pr_err("kzalloc failed\n");
goto fail_nomem;
}
/*
* should never fail, but please keep this around to ensure
* we keep the hardware happy
*/
BUG_ON(!IS_ALIGNED((long)omap_domain->pgtable, IOPGD_TABLE_SIZE));
clean_dcache_area(omap_domain->pgtable, IOPGD_TABLE_SIZE);
spin_lock_init(&omap_domain->lock);
domain->priv = omap_domain;
return 0;
fail_nomem:
kfree(omap_domain);
out:
return -ENOMEM;
}
/* assume device was already detached */
static void omap_iommu_domain_destroy(struct iommu_domain *domain)
{
struct omap_iommu_domain *omap_domain = domain->priv;
domain->priv = NULL;
kfree(omap_domain->pgtable);
kfree(omap_domain);
}
static phys_addr_t omap_iommu_iova_to_phys(struct iommu_domain *domain,
unsigned long da)
{
struct omap_iommu_domain *omap_domain = domain->priv;
struct omap_iommu *oiommu = omap_domain->iommu_dev;
struct device *dev = oiommu->dev;
u32 *pgd, *pte;
phys_addr_t ret = 0;
iopgtable_lookup_entry(oiommu, da, &pgd, &pte);
if (pte) {
if (iopte_is_small(*pte))
ret = omap_iommu_translate(*pte, da, IOPTE_MASK);
else if (iopte_is_large(*pte))
ret = omap_iommu_translate(*pte, da, IOLARGE_MASK);
else
dev_err(dev, "bogus pte 0x%x", *pte);
} else {
if (iopgd_is_section(*pgd))
ret = omap_iommu_translate(*pgd, da, IOSECTION_MASK);
else if (iopgd_is_super(*pgd))
ret = omap_iommu_translate(*pgd, da, IOSUPER_MASK);
else
dev_err(dev, "bogus pgd 0x%x", *pgd);
}
return ret;
}
static int omap_iommu_domain_has_cap(struct iommu_domain *domain,
unsigned long cap)
{
return 0;
}
static struct iommu_ops omap_iommu_ops = {
.domain_init = omap_iommu_domain_init,
.domain_destroy = omap_iommu_domain_destroy,
.attach_dev = omap_iommu_attach_dev,
.detach_dev = omap_iommu_detach_dev,
.map = omap_iommu_map,
.unmap = omap_iommu_unmap,
.iova_to_phys = omap_iommu_iova_to_phys,
.domain_has_cap = omap_iommu_domain_has_cap,
};
static int __init omap_iommu_init(void)
{
struct kmem_cache *p;
@ -1084,6 +1225,8 @@ static int __init omap_iommu_init(void)
return -ENOMEM;
iopte_cachep = p;
bus_set_iommu(&platform_bus_type, &omap_iommu_ops);
return platform_driver_register(&omap_iommu_driver);
}
module_init(omap_iommu_init);

370
arch/arm/plat-omap/iovmm.c → drivers/iommu/omap-iovmm.c
View File

@ -15,6 +15,7 @@
#include <linux/vmalloc.h>
#include <linux/device.h>
#include <linux/scatterlist.h>
#include <linux/iommu.h>
#include <asm/cacheflush.h>
#include <asm/mach/map.h>
@ -22,44 +23,19 @@
#include <plat/iommu.h>
#include <plat/iovmm.h>
#include "iopgtable.h"
/*
* A device driver needs to create address mappings between:
*
* - iommu/device address
* - physical address
* - mpu virtual address
*
* There are 4 possible patterns for them:
*
* |iova/ mapping iommu_ page
* | da pa va (d)-(p)-(v) function type
* ---------------------------------------------------------------------------
* 1 | c c c 1 - 1 - 1 _kmap() / _kunmap() s
* 2 | c c,a c 1 - 1 - 1 _kmalloc()/ _kfree() s
* 3 | c d c 1 - n - 1 _vmap() / _vunmap() s
* 4 | c d,a c 1 - n - 1 _vmalloc()/ _vfree() n*
*
*
* 'iova': device iommu virtual address
* 'da': alias of 'iova'
* 'pa': physical address
* 'va': mpu virtual address
*
* 'c': contiguous memory area
* 'd': discontiguous memory area
* 'a': anonymous memory allocation
* '()': optional feature
*
* 'n': a normal page(4KB) size is used.
* 's': multiple iommu superpage(16MB, 1MB, 64KB, 4KB) size is used.
*
* '*': not yet, but feasible.
*/
#include <plat/iopgtable.h>
static struct kmem_cache *iovm_area_cachep;
/* return the offset of the first scatterlist entry in a sg table */
static unsigned int sgtable_offset(const struct sg_table *sgt)
{
if (!sgt || !sgt->nents)
return 0;
return sgt->sgl->offset;
}
/* return total bytes of sg buffers */
static size_t sgtable_len(const struct sg_table *sgt)
{
@ -72,11 +48,17 @@ static size_t sgtable_len(const struct sg_table *sgt)
for_each_sg(sgt->sgl, sg, sgt->nents, i) {
size_t bytes;
bytes = sg->length;
bytes = sg->length + sg->offset;
if (!iopgsz_ok(bytes)) {
pr_err("%s: sg[%d] not iommu pagesize(%x)\n",
__func__, i, bytes);
pr_err("%s: sg[%d] not iommu pagesize(%u %u)\n",
__func__, i, bytes, sg->offset);
return 0;
}
if (i && sg->offset) {
pr_err("%s: sg[%d] offset not allowed in internal "
"entries\n", __func__, i);
return 0;
}
@ -197,8 +179,8 @@ static void *vmap_sg(const struct sg_table *sgt)
u32 pa;
int err;
pa = sg_phys(sg);
bytes = sg->length;
pa = sg_phys(sg) - sg->offset;
bytes = sg->length + sg->offset;
BUG_ON(bytes != PAGE_SIZE);
@ -224,7 +206,8 @@ static inline void vunmap_sg(const void *va)
vunmap(va);
}
static struct iovm_struct *__find_iovm_area(struct iommu *obj, const u32 da)
static struct iovm_struct *__find_iovm_area(struct omap_iommu *obj,
const u32 da)
{
struct iovm_struct *tmp;
@ -246,12 +229,12 @@ static struct iovm_struct *__find_iovm_area(struct iommu *obj, const u32 da)
}
/**
* find_iovm_area - find iovma which includes @da
* omap_find_iovm_area - find iovma which includes @da
* @da: iommu device virtual address
*
* Find the existing iovma starting at @da
*/
struct iovm_struct *find_iovm_area(struct iommu *obj, u32 da)
struct iovm_struct *omap_find_iovm_area(struct omap_iommu *obj, u32 da)
{
struct iovm_struct *area;
@ -261,13 +244,13 @@ struct iovm_struct *find_iovm_area(struct iommu *obj, u32 da)
return area;
}
EXPORT_SYMBOL_GPL(find_iovm_area);
EXPORT_SYMBOL_GPL(omap_find_iovm_area);
/*
* This finds the hole(area) which fits the requested address and len
* in iovmas mmap, and returns the new allocated iovma.
*/
static struct iovm_struct *alloc_iovm_area(struct iommu *obj, u32 da,
static struct iovm_struct *alloc_iovm_area(struct omap_iommu *obj, u32 da,
size_t bytes, u32 flags)
{
struct iovm_struct *new, *tmp;
@ -342,7 +325,7 @@ found:
return new;
}
static void free_iovm_area(struct iommu *obj, struct iovm_struct *area)
static void free_iovm_area(struct omap_iommu *obj, struct iovm_struct *area)
{
size_t bytes;
@ -358,14 +341,14 @@ static void free_iovm_area(struct iommu *obj, struct iovm_struct *area)
}
/**
* da_to_va - convert (d) to (v)
* omap_da_to_va - convert (d) to (v)
* @obj: objective iommu
* @da: iommu device virtual address
* @va: mpu virtual address
*
* Returns mpu virtual addr which corresponds to a given device virtual addr
*/
void *da_to_va(struct iommu *obj, u32 da)
void *omap_da_to_va(struct omap_iommu *obj, u32 da)
{
void *va = NULL;
struct iovm_struct *area;
@ -383,7 +366,7 @@ out:
return va;
}
EXPORT_SYMBOL_GPL(da_to_va);
EXPORT_SYMBOL_GPL(omap_da_to_va);
static void sgtable_fill_vmalloc(struct sg_table *sgt, void *_va)
{
@ -397,7 +380,7 @@ static void sgtable_fill_vmalloc(struct sg_table *sgt, void *_va)
const size_t bytes = PAGE_SIZE;
/*
* iommu 'superpage' isn't supported with 'iommu_vmalloc()'
* iommu 'superpage' isn't supported with 'omap_iommu_vmalloc()'
*/
pg = vmalloc_to_page(va);
BUG_ON(!pg);
@ -418,74 +401,39 @@ static inline void sgtable_drain_vmalloc(struct sg_table *sgt)
BUG_ON(!sgt);
}
static void sgtable_fill_kmalloc(struct sg_table *sgt, u32 pa, u32 da,
size_t len)
{
unsigned int i;
struct scatterlist *sg;
for_each_sg(sgt->sgl, sg, sgt->nents, i) {
unsigned bytes;
bytes = max_alignment(da | pa);
bytes = min_t(unsigned, bytes, iopgsz_max(len));
BUG_ON(!iopgsz_ok(bytes));
sg_set_buf(sg, phys_to_virt(pa), bytes);
/*
* 'pa' is cotinuous(linear).
*/
pa += bytes;
da += bytes;
len -= bytes;
}
BUG_ON(len);
}
static inline void sgtable_drain_kmalloc(struct sg_table *sgt)
{
/*
* Actually this is not necessary at all, just exists for
* consistency of the code readability
*/
BUG_ON(!sgt);
}
/* create 'da' <-> 'pa' mapping from 'sgt' */
static int map_iovm_area(struct iommu *obj, struct iovm_struct *new,
const struct sg_table *sgt, u32 flags)
static int map_iovm_area(struct iommu_domain *domain, struct iovm_struct *new,
const struct sg_table *sgt, u32 flags)
{
int err;
unsigned int i, j;
struct scatterlist *sg;
u32 da = new->da_start;
int order;
if (!obj || !sgt)
if (!domain || !sgt)
return -EINVAL;
BUG_ON(!sgtable_ok(sgt));
for_each_sg(sgt->sgl, sg, sgt->nents, i) {
u32 pa;
int pgsz;
size_t bytes;
struct iotlb_entry e;
pa = sg_phys(sg);
bytes = sg->length;
pa = sg_phys(sg) - sg->offset;
bytes = sg->length + sg->offset;
flags &= ~IOVMF_PGSZ_MASK;
pgsz = bytes_to_iopgsz(bytes);
if (pgsz < 0)
if (bytes_to_iopgsz(bytes) < 0)
goto err_out;
flags |= pgsz;
order = get_order(bytes);
pr_debug("%s: [%d] %08x %08x(%x)\n", __func__,
i, da, pa, bytes);
iotlb_init_entry(&e, da, pa, flags);
err = iopgtable_store_entry(obj, &e);
err = iommu_map(domain, da, pa, order, flags);
if (err)
goto err_out;
@ -499,9 +447,11 @@ err_out:
for_each_sg(sgt->sgl, sg, i, j) {
size_t bytes;
bytes = iopgtable_clear_entry(obj, da);
bytes = sg->length + sg->offset;
order = get_order(bytes);
BUG_ON(!iopgsz_ok(bytes));
/* ignore failures.. we're already handling one */
iommu_unmap(domain, da, order);
da += bytes;
}
@ -509,22 +459,31 @@ err_out:
}
/* release 'da' <-> 'pa' mapping */
static void unmap_iovm_area(struct iommu *obj, struct iovm_struct *area)
static void unmap_iovm_area(struct iommu_domain *domain, struct omap_iommu *obj,
struct iovm_struct *area)
{
u32 start;
size_t total = area->da_end - area->da_start;
const struct sg_table *sgt = area->sgt;
struct scatterlist *sg;
int i, err;
BUG_ON(!sgtable_ok(sgt));
BUG_ON((!total) || !IS_ALIGNED(total, PAGE_SIZE));
start = area->da_start;
while (total > 0) {
for_each_sg(sgt->sgl, sg, sgt->nents, i) {
size_t bytes;
int order;
bytes = iopgtable_clear_entry(obj, start);
if (bytes == 0)
bytes = PAGE_SIZE;
else
dev_dbg(obj->dev, "%s: unmap %08x(%x) %08x\n",
bytes = sg->length + sg->offset;
order = get_order(bytes);
err = iommu_unmap(domain, start, order);
if (err < 0)
break;
dev_dbg(obj->dev, "%s: unmap %08x(%x) %08x\n",
__func__, start, bytes, area->flags);
BUG_ON(!IS_ALIGNED(bytes, PAGE_SIZE));
@ -536,7 +495,8 @@ static void unmap_iovm_area(struct iommu *obj, struct iovm_struct *area)
}
/* template function for all unmapping */
static struct sg_table *unmap_vm_area(struct iommu *obj, const u32 da,
static struct sg_table *unmap_vm_area(struct iommu_domain *domain,
struct omap_iommu *obj, const u32 da,
void (*fn)(const void *), u32 flags)
{
struct sg_table *sgt = NULL;
@ -562,7 +522,7 @@ static struct sg_table *unmap_vm_area(struct iommu *obj, const u32 da,
}
sgt = (struct sg_table *)area->sgt;
unmap_iovm_area(obj, area);
unmap_iovm_area(domain, obj, area);
fn(area->va);
@ -577,8 +537,9 @@ out:
return sgt;
}
static u32 map_iommu_region(struct iommu *obj, u32 da,
const struct sg_table *sgt, void *va, size_t bytes, u32 flags)
static u32 map_iommu_region(struct iommu_domain *domain, struct omap_iommu *obj,
u32 da, const struct sg_table *sgt, void *va,
size_t bytes, u32 flags)
{
int err = -ENOMEM;
struct iovm_struct *new;
@ -593,7 +554,7 @@ static u32 map_iommu_region(struct iommu *obj, u32 da,
new->va = va;
new->sgt = sgt;
if (map_iovm_area(obj, new, sgt, new->flags))
if (map_iovm_area(domain, new, sgt, new->flags))
goto err_map;
mutex_unlock(&obj->mmap_lock);
@ -610,14 +571,16 @@ err_alloc_iovma:
return err;
}
static inline u32 __iommu_vmap(struct iommu *obj, u32 da,
const struct sg_table *sgt, void *va, size_t bytes, u32 flags)
static inline u32
__iommu_vmap(struct iommu_domain *domain, struct omap_iommu *obj,
u32 da, const struct sg_table *sgt,
void *va, size_t bytes, u32 flags)
{
return map_iommu_region(obj, da, sgt, va, bytes, flags);
return map_iommu_region(domain, obj, da, sgt, va, bytes, flags);
}
/**
* iommu_vmap - (d)-(p)-(v) address mapper
* omap_iommu_vmap - (d)-(p)-(v) address mapper
* @obj: objective iommu
* @sgt: address of scatter gather table
* @flags: iovma and page property
@ -625,8 +588,8 @@ static inline u32 __iommu_vmap(struct iommu *obj, u32 da,
* Creates 1-n-1 mapping with given @sgt and returns @da.
* All @sgt element must be io page size aligned.
*/
u32 iommu_vmap(struct iommu *obj, u32 da, const struct sg_table *sgt,
u32 flags)
u32 omap_iommu_vmap(struct iommu_domain *domain, struct omap_iommu *obj, u32 da,
const struct sg_table *sgt, u32 flags)
{
size_t bytes;
void *va = NULL;
@ -648,38 +611,41 @@ u32 iommu_vmap(struct iommu *obj, u32 da, const struct sg_table *sgt,
flags |= IOVMF_DISCONT;
flags |= IOVMF_MMIO;
da = __iommu_vmap(obj, da, sgt, va, bytes, flags);
da = __iommu_vmap(domain, obj, da, sgt, va, bytes, flags);
if (IS_ERR_VALUE(da))
vunmap_sg(va);
return da;
return da + sgtable_offset(sgt);
}
EXPORT_SYMBOL_GPL(iommu_vmap);
EXPORT_SYMBOL_GPL(omap_iommu_vmap);
/**
* iommu_vunmap - release virtual mapping obtained by 'iommu_vmap()'
* omap_iommu_vunmap - release virtual mapping obtained by 'omap_iommu_vmap()'
* @obj: objective iommu
* @da: iommu device virtual address
*
* Free the iommu virtually contiguous memory area starting at
* @da, which was returned by 'iommu_vmap()'.
* @da, which was returned by 'omap_iommu_vmap()'.
*/
struct sg_table *iommu_vunmap(struct iommu *obj, u32 da)
struct sg_table *
omap_iommu_vunmap(struct iommu_domain *domain, struct omap_iommu *obj, u32 da)
{
struct sg_table *sgt;
/*
* 'sgt' is allocated before 'iommu_vmalloc()' is called.
* 'sgt' is allocated before 'omap_iommu_vmalloc()' is called.
* Just returns 'sgt' to the caller to free
*/
sgt = unmap_vm_area(obj, da, vunmap_sg, IOVMF_DISCONT | IOVMF_MMIO);
da &= PAGE_MASK;
sgt = unmap_vm_area(domain, obj, da, vunmap_sg,
IOVMF_DISCONT | IOVMF_MMIO);
if (!sgt)
dev_dbg(obj->dev, "%s: No sgt\n", __func__);
return sgt;
}
EXPORT_SYMBOL_GPL(iommu_vunmap);
EXPORT_SYMBOL_GPL(omap_iommu_vunmap);
/**
* iommu_vmalloc - (d)-(p)-(v) address allocator and mapper
* omap_iommu_vmalloc - (d)-(p)-(v) address allocator and mapper
* @obj: objective iommu
* @da: contiguous iommu virtual memory
* @bytes: allocation size
@ -688,7 +654,9 @@ EXPORT_SYMBOL_GPL(iommu_vunmap);
* Allocate @bytes linearly and creates 1-n-1 mapping and returns
* @da again, which might be adjusted if 'IOVMF_DA_FIXED' is not set.
*/
u32 iommu_vmalloc(struct iommu *obj, u32 da, size_t bytes, u32 flags)
u32
omap_iommu_vmalloc(struct iommu_domain *domain, struct omap_iommu *obj, u32 da,
size_t bytes, u32 flags)
{
void *va;
struct sg_table *sgt;
@ -712,7 +680,7 @@ u32 iommu_vmalloc(struct iommu *obj, u32 da, size_t bytes, u32 flags)
}
sgtable_fill_vmalloc(sgt, va);
da = __iommu_vmap(obj, da, sgt, va, bytes, flags);
da = __iommu_vmap(domain, obj, da, sgt, va, bytes, flags);
if (IS_ERR_VALUE(da))
goto err_iommu_vmap;
@ -725,158 +693,28 @@ err_sgt_alloc:
vfree(va);
return da;
}
EXPORT_SYMBOL_GPL(iommu_vmalloc);
EXPORT_SYMBOL_GPL(omap_iommu_vmalloc);
/**
* iommu_vfree - release memory allocated by 'iommu_vmalloc()'
* omap_iommu_vfree - release memory allocated by 'omap_iommu_vmalloc()'
* @obj: objective iommu
* @da: iommu device virtual address
*
* Frees the iommu virtually continuous memory area starting at
* @da, as obtained from 'iommu_vmalloc()'.
* @da, as obtained from 'omap_iommu_vmalloc()'.
*/
void iommu_vfree(struct iommu *obj, const u32 da)
void omap_iommu_vfree(struct iommu_domain *domain, struct omap_iommu *obj,
const u32 da)
{
struct sg_table *sgt;
sgt = unmap_vm_area(obj, da, vfree, IOVMF_DISCONT | IOVMF_ALLOC);
sgt = unmap_vm_area(domain, obj, da, vfree,
IOVMF_DISCONT | IOVMF_ALLOC);
if (!sgt)
dev_dbg(obj->dev, "%s: No sgt\n", __func__);
sgtable_free(sgt);
}
EXPORT_SYMBOL_GPL(iommu_vfree);
static u32 __iommu_kmap(struct iommu *obj, u32 da, u32 pa, void *va,
size_t bytes, u32 flags)
{
struct sg_table *sgt;
sgt = sgtable_alloc(bytes, flags, da, pa);
if (IS_ERR(sgt))
return PTR_ERR(sgt);
sgtable_fill_kmalloc(sgt, pa, da, bytes);
da = map_iommu_region(obj, da, sgt, va, bytes, flags);
if (IS_ERR_VALUE(da)) {
sgtable_drain_kmalloc(sgt);
sgtable_free(sgt);
}
return da;
}
/**
* iommu_kmap - (d)-(p)-(v) address mapper
* @obj: objective iommu
* @da: contiguous iommu virtual memory
* @pa: contiguous physical memory
* @flags: iovma and page property
*
* Creates 1-1-1 mapping and returns @da again, which can be
* adjusted if 'IOVMF_DA_FIXED' is not set.
*/
u32 iommu_kmap(struct iommu *obj, u32 da, u32 pa, size_t bytes,
u32 flags)
{
void *va;
if (!obj || !obj->dev || !bytes)
return -EINVAL;
bytes = PAGE_ALIGN(bytes);
va = ioremap(pa, bytes);
if (!va)
return -ENOMEM;
flags |= IOVMF_LINEAR;
flags |= IOVMF_MMIO;
da = __iommu_kmap(obj, da, pa, va, bytes, flags);
if (IS_ERR_VALUE(da))
iounmap(va);
return da;
}
EXPORT_SYMBOL_GPL(iommu_kmap);
/**
* iommu_kunmap - release virtual mapping obtained by 'iommu_kmap()'
* @obj: objective iommu
* @da: iommu device virtual address
*
* Frees the iommu virtually contiguous memory area starting at
* @da, which was passed to and was returned by'iommu_kmap()'.
*/
void iommu_kunmap(struct iommu *obj, u32 da)
{
struct sg_table *sgt;
typedef void (*func_t)(const void *);
sgt = unmap_vm_area(obj, da, (func_t)iounmap,
IOVMF_LINEAR | IOVMF_MMIO);
if (!sgt)
dev_dbg(obj->dev, "%s: No sgt\n", __func__);
sgtable_free(sgt);
}
EXPORT_SYMBOL_GPL(iommu_kunmap);
/**
* iommu_kmalloc - (d)-(p)-(v) address allocator and mapper
* @obj: objective iommu
* @da: contiguous iommu virtual memory
* @bytes: bytes for allocation
* @flags: iovma and page property
*
* Allocate @bytes linearly and creates 1-1-1 mapping and returns
* @da again, which might be adjusted if 'IOVMF_DA_FIXED' is not set.
*/
u32 iommu_kmalloc(struct iommu *obj, u32 da, size_t bytes, u32 flags)
{
void *va;
u32 pa;
if (!obj || !obj->dev || !bytes)
return -EINVAL;
bytes = PAGE_ALIGN(bytes);
va = kmalloc(bytes, GFP_KERNEL | GFP_DMA);
if (!va)
return -ENOMEM;
pa = virt_to_phys(va);
flags |= IOVMF_LINEAR;
flags |= IOVMF_ALLOC;
da = __iommu_kmap(obj, da, pa, va, bytes, flags);
if (IS_ERR_VALUE(da))
kfree(va);
return da;
}
EXPORT_SYMBOL_GPL(iommu_kmalloc);
/**
* iommu_kfree - release virtual mapping obtained by 'iommu_kmalloc()'
* @obj: objective iommu
* @da: iommu device virtual address
*
* Frees the iommu virtually contiguous memory area starting at
* @da, which was passed to and was returned by'iommu_kmalloc()'.
*/
void iommu_kfree(struct iommu *obj, u32 da)
{
struct sg_table *sgt;
sgt = unmap_vm_area(obj, da, kfree, IOVMF_LINEAR | IOVMF_ALLOC);
if (!sgt)
dev_dbg(obj->dev, "%s: No sgt\n", __func__);
sgtable_free(sgt);
}
EXPORT_SYMBOL_GPL(iommu_kfree);
EXPORT_SYMBOL_GPL(omap_iommu_vfree);
static int __init iovmm_init(void)
{

3
drivers/media/video/Kconfig
View File

@ -763,8 +763,7 @@ source "drivers/media/video/m5mols/Kconfig"
config VIDEO_OMAP3
tristate "OMAP 3 Camera support (EXPERIMENTAL)"
select OMAP_IOMMU
depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API && ARCH_OMAP3 && EXPERIMENTAL
depends on OMAP_IOVMM && VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API && ARCH_OMAP3 && EXPERIMENTAL
---help---
Driver for an OMAP 3 camera controller.

45
drivers/media/video/omap3isp/isp.c
View File

@ -80,6 +80,13 @@
#include "isph3a.h"
#include "isphist.h"
/*
* this is provided as an interim solution until omap3isp doesn't need
* any omap-specific iommu API
*/
#define to_iommu(dev) \
(struct omap_iommu *)platform_get_drvdata(to_platform_device(dev))
static unsigned int autoidle;
module_param(autoidle, int, 0444);
MODULE_PARM_DESC(autoidle, "Enable OMAP3ISP AUTOIDLE support");
@ -1108,7 +1115,7 @@ static void isp_save_ctx(struct isp_device *isp)
{
isp_save_context(isp, isp_reg_list);
if (isp->iommu)
iommu_save_ctx(isp->iommu);
omap_iommu_save_ctx(isp->iommu);
}
/*
@ -1122,7 +1129,7 @@ static void isp_restore_ctx(struct isp_device *isp)
{
isp_restore_context(isp, isp_reg_list);
if (isp->iommu)
iommu_restore_ctx(isp->iommu);
omap_iommu_restore_ctx(isp->iommu);
omap3isp_ccdc_restore_context(isp);
omap3isp_preview_restore_context(isp);
}
@ -1975,7 +1982,8 @@ static int isp_remove(struct platform_device *pdev)
isp_cleanup_modules(isp);
omap3isp_get(isp);
iommu_put(isp->iommu);
iommu_detach_device(isp->domain, isp->iommu_dev);
iommu_domain_free(isp->domain);
omap3isp_put(isp);
free_irq(isp->irq_num, isp);
@ -2123,25 +2131,41 @@ static int isp_probe(struct platform_device *pdev)
}
/* IOMMU */
isp->iommu = iommu_get("isp");
if (IS_ERR_OR_NULL(isp->iommu)) {
isp->iommu = NULL;
isp->iommu_dev = omap_find_iommu_device("isp");
if (!isp->iommu_dev) {
dev_err(isp->dev, "omap_find_iommu_device failed\n");
ret = -ENODEV;
goto error_isp;
}
/* to be removed once iommu migration is complete */
isp->iommu = to_iommu(isp->iommu_dev);
isp->domain = iommu_domain_alloc(pdev->dev.bus);
if (!isp->domain) {
dev_err(isp->dev, "can't alloc iommu domain\n");
ret = -ENOMEM;
goto error_isp;
}
ret = iommu_attach_device(isp->domain, isp->iommu_dev);
if (ret) {
dev_err(&pdev->dev, "can't attach iommu device: %d\n", ret);
goto free_domain;
}
/* Interrupt */
isp->irq_num = platform_get_irq(pdev, 0);
if (isp->irq_num <= 0) {
dev_err(isp->dev, "No IRQ resource\n");
ret = -ENODEV;
goto error_isp;
goto detach_dev;
}
if (request_irq(isp->irq_num, isp_isr, IRQF_SHARED, "OMAP3 ISP", isp)) {
dev_err(isp->dev, "Unable to request IRQ\n");
ret = -EINVAL;
goto error_isp;
goto detach_dev;
}
/* Entities */
@ -2162,8 +2186,11 @@ error_modules:
isp_cleanup_modules(isp);
error_irq:
free_irq(isp->irq_num, isp);
detach_dev:
iommu_detach_device(isp->domain, isp->iommu_dev);
free_domain:
iommu_domain_free(isp->domain);
error_isp:
iommu_put(isp->iommu);
omap3isp_put(isp);
error:
isp_put_clocks(isp);

5
drivers/media/video/omap3isp/isp.h
View File

@ -32,6 +32,7 @@
#include <linux/io.h>
#include <linux/platform_device.h>
#include <linux/wait.h>
#include <linux/iommu.h>
#include <plat/iommu.h>
#include <plat/iovmm.h>
@ -294,7 +295,9 @@ struct isp_device {
unsigned int sbl_resources;
unsigned int subclk_resources;
struct iommu *iommu;
struct omap_iommu *iommu;
struct iommu_domain *domain;
struct device *iommu_dev;
struct isp_platform_callback platform_cb;
};

25
drivers/media/video/omap3isp/ispccdc.c
View File

@ -366,7 +366,7 @@ static void ccdc_lsc_free_request(struct isp_ccdc_device *ccdc,
dma_unmap_sg(isp->dev, req->iovm->sgt->sgl,
req->iovm->sgt->nents, DMA_TO_DEVICE);
if (req->table)
iommu_vfree(isp->iommu, req->table);
omap_iommu_vfree(isp->domain, isp->iommu, req->table);
kfree(req);
}
@ -438,15 +438,15 @@ static int ccdc_lsc_config(struct isp_ccdc_device *ccdc,
req->enable = 1;
req->table = iommu_vmalloc(isp->iommu, 0, req->config.size,
IOMMU_FLAG);
req->table = omap_iommu_vmalloc(isp->domain, isp->iommu, 0,
req->config.size, IOMMU_FLAG);
if (IS_ERR_VALUE(req->table)) {
req->table = 0;
ret = -ENOMEM;
goto done;
}
req->iovm = find_iovm_area(isp->iommu, req->table);
req->iovm = omap_find_iovm_area(isp->iommu, req->table);
if (req->iovm == NULL) {
ret = -ENOMEM;
goto done;
@ -462,7 +462,7 @@ static int ccdc_lsc_config(struct isp_ccdc_device *ccdc,
dma_sync_sg_for_cpu(isp->dev, req->iovm->sgt->sgl,
req->iovm->sgt->nents, DMA_TO_DEVICE);
table = da_to_va(isp->iommu, req->table);
table = omap_da_to_va(isp->iommu, req->table);
if (copy_from_user(table, config->lsc, req->config.size)) {
ret = -EFAULT;
goto done;
@ -731,18 +731,19 @@ static int ccdc_config(struct isp_ccdc_device *ccdc,
/*
* table_new must be 64-bytes aligned, but it's
* already done by iommu_vmalloc().
* already done by omap_iommu_vmalloc().
*/
size = ccdc->fpc.fpnum * 4;
table_new = iommu_vmalloc(isp->iommu, 0, size,
IOMMU_FLAG);
table_new = omap_iommu_vmalloc(isp->domain, isp->iommu,
0, size, IOMMU_FLAG);
if (IS_ERR_VALUE(table_new))
return -ENOMEM;
if (copy_from_user(da_to_va(isp->iommu, table_new),
if (copy_from_user(omap_da_to_va(isp->iommu, table_new),
(__force void __user *)
ccdc->fpc.fpcaddr, size)) {
iommu_vfree(isp->iommu, table_new);
omap_iommu_vfree(isp->domain, isp->iommu,
table_new);
return -EFAULT;
}
@ -752,7 +753,7 @@ static int ccdc_config(struct isp_ccdc_device *ccdc,
ccdc_configure_fpc(ccdc);
if (table_old != 0)
iommu_vfree(isp->iommu, table_old);
omap_iommu_vfree(isp->domain, isp->iommu, table_old);
}
return ccdc_lsc_config(ccdc, ccdc_struct);
@ -2287,5 +2288,5 @@ void omap3isp_ccdc_cleanup(struct isp_device *isp)
ccdc_lsc_free_queue(ccdc, &ccdc->lsc.free_queue);
if (ccdc->fpc.fpcaddr != 0)
iommu_vfree(isp->iommu, ccdc->fpc.fpcaddr);
omap_iommu_vfree(isp->domain, isp->iommu, ccdc->fpc.fpcaddr);
}

11
drivers/media/video/omap3isp/ispstat.c
View File

@ -366,7 +366,8 @@ static void isp_stat_bufs_free(struct ispstat *stat)
dma_unmap_sg(isp->dev, buf->iovm->sgt->sgl,
buf->iovm->sgt->nents,
DMA_FROM_DEVICE);
iommu_vfree(isp->iommu, buf->iommu_addr);
omap_iommu_vfree(isp->domain, isp->iommu,
buf->iommu_addr);
} else {
if (!buf->virt_addr)
continue;
@ -399,8 +400,8 @@ static int isp_stat_bufs_alloc_iommu(struct ispstat *stat, unsigned int size)
struct iovm_struct *iovm;
WARN_ON(buf->dma_addr);
buf->iommu_addr = iommu_vmalloc(isp->iommu, 0, size,
IOMMU_FLAG);
buf->iommu_addr = omap_iommu_vmalloc(isp->domain, isp->iommu, 0,
size, IOMMU_FLAG);
if (IS_ERR((void *)buf->iommu_addr)) {
dev_err(stat->isp->dev,
"%s: Can't acquire memory for "
@ -409,7 +410,7 @@ static int isp_stat_bufs_alloc_iommu(struct ispstat *stat, unsigned int size)
return -ENOMEM;
}
iovm = find_iovm_area(isp->iommu, buf->iommu_addr);
iovm = omap_find_iovm_area(isp->iommu, buf->iommu_addr);
if (!iovm ||
!dma_map_sg(isp->dev, iovm->sgt->sgl, iovm->sgt->nents,
DMA_FROM_DEVICE)) {
@ -418,7 +419,7 @@ static int isp_stat_bufs_alloc_iommu(struct ispstat *stat, unsigned int size)
}
buf->iovm = iovm;
buf->virt_addr = da_to_va(stat->isp->iommu,
buf->virt_addr = omap_da_to_va(stat->isp->iommu,
(u32)buf->iommu_addr);
buf->empty = 1;
dev_dbg(stat->isp->dev, "%s: buffer[%d] allocated."

4
drivers/media/video/omap3isp/ispvideo.c
View File

@ -446,7 +446,7 @@ ispmmu_vmap(struct isp_device *isp, const struct scatterlist *sglist, int sglen)
sgt->nents = sglen;
sgt->orig_nents = sglen;
da = iommu_vmap(isp->iommu, 0, sgt, IOMMU_FLAG);
da = omap_iommu_vmap(isp->domain, isp->iommu, 0, sgt, IOMMU_FLAG);
if (IS_ERR_VALUE(da))
kfree(sgt);
@ -462,7 +462,7 @@ static void ispmmu_vunmap(struct isp_device *isp, dma_addr_t da)
{
struct sg_table *sgt;
sgt = iommu_vunmap(isp->iommu, (u32)da);
sgt = omap_iommu_vunmap(isp->domain, isp->iommu, (u32)da);
kfree(sgt);
}

6
include/linux/device.h
View File

@ -33,6 +33,7 @@ struct class;
struct subsys_private;
struct bus_type;
struct device_node;
struct iommu_ops;
struct bus_attribute {
struct attribute attr;
@ -67,6 +68,9 @@ extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
* @resume: Called to bring a device on this bus out of sleep mode.
* @pm: Power management operations of this bus, callback the specific
* device driver's pm-ops.
* @iommu_ops IOMMU specific operations for this bus, used to attach IOMMU
* driver implementations to a bus and allow the driver to do
* bus-specific setup
* @p: The private data of the driver core, only the driver core can
* touch this.
*
@ -96,6 +100,8 @@ struct bus_type {
const struct dev_pm_ops *pm;
struct iommu_ops *iommu_ops;
struct subsys_private *p;
};

76
include/linux/iommu.h
View File

@ -25,15 +25,29 @@
#define IOMMU_WRITE (2)
#define IOMMU_CACHE (4) /* DMA cache coherency */
struct iommu_ops;
struct bus_type;
struct device;
struct iommu_domain;
/* iommu fault flags */
#define IOMMU_FAULT_READ 0x0
#define IOMMU_FAULT_WRITE 0x1
typedef int (*iommu_fault_handler_t)(struct iommu_domain *,
struct device *, unsigned long, int);
struct iommu_domain {
struct iommu_ops *ops;
void *priv;
iommu_fault_handler_t handler;
};
#define IOMMU_CAP_CACHE_COHERENCY 0x1
#define IOMMU_CAP_INTR_REMAP 0x2 /* isolates device intrs */
#ifdef CONFIG_IOMMU_API
struct iommu_ops {
int (*domain_init)(struct iommu_domain *domain);
void (*domain_destroy)(struct iommu_domain *domain);
@ -49,11 +63,9 @@ struct iommu_ops {
unsigned long cap);
};
#ifdef CONFIG_IOMMU_API
extern void register_iommu(struct iommu_ops *ops);
extern bool iommu_found(void);
extern struct iommu_domain *iommu_domain_alloc(void);
extern int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops);
extern bool iommu_present(struct bus_type *bus);
extern struct iommu_domain *iommu_domain_alloc(struct bus_type *bus);
extern void iommu_domain_free(struct iommu_domain *domain);
extern int iommu_attach_device(struct iommu_domain *domain,
struct device *dev);
@ -67,19 +79,58 @@ extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain,
unsigned long iova);
extern int iommu_domain_has_cap(struct iommu_domain *domain,
unsigned long cap);
extern void iommu_set_fault_handler(struct iommu_domain *domain,
iommu_fault_handler_t handler);
/**
* report_iommu_fault() - report about an IOMMU fault to the IOMMU framework
* @domain: the iommu domain where the fault has happened
* @dev: the device where the fault has happened
* @iova: the faulting address
* @flags: mmu fault flags (e.g. IOMMU_FAULT_READ/IOMMU_FAULT_WRITE/...)
*
* This function should be called by the low-level IOMMU implementations
* whenever IOMMU faults happen, to allow high-level users, that are
* interested in such events, to know about them.
*
* This event may be useful for several possible use cases:
* - mere logging of the event
* - dynamic TLB/PTE loading
* - if restarting of the faulting device is required
*
* Returns 0 on success and an appropriate error code otherwise (if dynamic
* PTE/TLB loading will one day be supported, implementations will be able
* to tell whether it succeeded or not according to this return value).
*
* Specifically, -ENOSYS is returned if a fault handler isn't installed
* (though fault handlers can also return -ENOSYS, in case they want to
* elicit the default behavior of the IOMMU drivers).
*/
static inline int report_iommu_fault(struct iommu_domain *domain,
struct device *dev, unsigned long iova, int flags)
{
int ret = -ENOSYS;
/*
* if upper layers showed interest and installed a fault handler,
* invoke it.
*/
if (domain->handler)
ret = domain->handler(domain, dev, iova, flags);
return ret;
}
#else /* CONFIG_IOMMU_API */
static inline void register_iommu(struct iommu_ops *ops)
{
}
struct iommu_ops {};
static inline bool iommu_found(void)
static inline bool iommu_present(struct bus_type *bus)
{
return false;
}
static inline struct iommu_domain *iommu_domain_alloc(void)
static inline struct iommu_domain *iommu_domain_alloc(struct bus_type *bus)
{
return NULL;
}
@ -123,6 +174,11 @@ static inline int domain_has_cap(struct iommu_domain *domain,
return 0;
}
static inline void iommu_set_fault_handler(struct iommu_domain *domain,
iommu_fault_handler_t handler)
{
}
#endif /* CONFIG_IOMMU_API */
#endif /* __LINUX_IOMMU_H */

68
lib/dma-debug.c
View File

@ -62,6 +62,8 @@ struct dma_debug_entry {
#endif
};
typedef bool (*match_fn)(struct dma_debug_entry *, struct dma_debug_entry *);
struct hash_bucket {
struct list_head list;
spinlock_t lock;
@ -240,18 +242,37 @@ static void put_hash_bucket(struct hash_bucket *bucket,
spin_unlock_irqrestore(&bucket->lock, __flags);
}
static bool exact_match(struct dma_debug_entry *a, struct dma_debug_entry *b)
{
return ((a->dev_addr == a->dev_addr) &&
(a->dev == b->dev)) ? true : false;
}
static bool containing_match(struct dma_debug_entry *a,
struct dma_debug_entry *b)
{
if (a->dev != b->dev)
return false;
if ((b->dev_addr <= a->dev_addr) &&
((b->dev_addr + b->size) >= (a->dev_addr + a->size)))
return true;
return false;
}
/*
* Search a given entry in the hash bucket list
*/
static struct dma_debug_entry *hash_bucket_find(struct hash_bucket *bucket,
struct dma_debug_entry *ref)
static struct dma_debug_entry *__hash_bucket_find(struct hash_bucket *bucket,
struct dma_debug_entry *ref,
match_fn match)
{
struct dma_debug_entry *entry, *ret = NULL;
int matches = 0, match_lvl, last_lvl = 0;
list_for_each_entry(entry, &bucket->list, list) {
if ((entry->dev_addr != ref->dev_addr) ||
(entry->dev != ref->dev))
if (!match(ref, entry))
continue;
/*
@ -293,6 +314,39 @@ static struct dma_debug_entry *hash_bucket_find(struct hash_bucket *bucket,
return ret;
}
static struct dma_debug_entry *bucket_find_exact(struct hash_bucket *bucket,
struct dma_debug_entry *ref)
{
return __hash_bucket_find(bucket, ref, exact_match);
}
static struct dma_debug_entry *bucket_find_contain(struct hash_bucket **bucket,
struct dma_debug_entry *ref,
unsigned long *flags)
{
unsigned int max_range = dma_get_max_seg_size(ref->dev);
struct dma_debug_entry *entry, index = *ref;
unsigned int range = 0;
while (range <= max_range) {
entry = __hash_bucket_find(*bucket, &index, containing_match);
if (entry)
return entry;
/*
* Nothing found, go back a hash bucket
*/
put_hash_bucket(*bucket, flags);
range += (1 << HASH_FN_SHIFT);
index.dev_addr -= (1 << HASH_FN_SHIFT);
*bucket = get_hash_bucket(&index, flags);
}
return NULL;
}
/*
* Add an entry to a hash bucket
*/
@ -802,7 +856,7 @@ static void check_unmap(struct dma_debug_entry *ref)
}
bucket = get_hash_bucket(ref, &flags);
entry = hash_bucket_find(bucket, ref);
entry = bucket_find_exact(bucket, ref);
if (!entry) {
err_printk(ref->dev, NULL, "DMA-API: device driver tries "
@ -902,7 +956,7 @@ static void check_sync(struct device *dev,
bucket = get_hash_bucket(ref, &flags);
entry = hash_bucket_find(bucket, ref);
entry = bucket_find_contain(&bucket, ref, &flags);
if (!entry) {
err_printk(dev, NULL, "DMA-API: device driver tries "
@ -1060,7 +1114,7 @@ static int get_nr_mapped_entries(struct device *dev,
int mapped_ents;
bucket = get_hash_bucket(ref, &flags);
entry = hash_bucket_find(bucket, ref);
entry = bucket_find_exact(bucket, ref);
mapped_ents = 0;
if (entry)

4
virt/kvm/iommu.c
View File

@ -228,12 +228,12 @@ int kvm_iommu_map_guest(struct kvm *kvm)
{
int r;
if (!iommu_found()) {
if (!iommu_present(&pci_bus_type)) {
printk(KERN_ERR "%s: iommu not found\n", __func__);
return -ENODEV;
}
kvm->arch.iommu_domain = iommu_domain_alloc();
kvm->arch.iommu_domain = iommu_domain_alloc(&pci_bus_type);
if (!kvm->arch.iommu_domain)
return -ENOMEM;