((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);
}
-static int omap2_iommu_enable(struct iommu *obj)
+static int omap2_iommu_enable(struct omap_iommu *obj)
{
u32 l, pa;
unsigned long timeout;
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);
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;
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);
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;
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;
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;
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;
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;
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);
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
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
};
};
-struct iommu {
+struct omap_iommu {
const char *name;
struct module *owner;
struct clk *clk;
void *isr_priv;
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,
struct list_head mmap;
struct mutex mmap_lock; /* protect mmap */
- int (*isr)(struct iommu *obj, u32 da, u32 iommu_errs, void *priv);
+ int (*isr)(struct omap_iommu *obj, u32 da, u32 iommu_errs, void *priv);
void *ctx; /* iommu context: registres saved area */
u32 da_start;
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 {
/*
* global functions
*/
-extern u32 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 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 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 u32 omap_iommu_arch_version(void);
+
+extern void omap_iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
+
+extern int
+omap_iopgtable_store_entry(struct omap_iommu *obj, struct iotlb_entry *e);
+
+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 */
/*
* 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);
}
#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.
*/
#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))
}
#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 */
#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 */
#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 */
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
+ select 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
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
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#include <linux/kernel.h>
#include <linux/bug.h>
#include <linux/types.h>
#include <linux/module.h>
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;
+ size = PAGE_SIZE << gfp_order;
- BUG_ON((iova | paddr) & invalid_mask);
+ BUG_ON(!IS_ALIGNED(iova | paddr, size));
return iommu_ops->map(domain, iova, paddr, gfp_order, prot);
}
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;
+ size = PAGE_SIZE << gfp_order;
- BUG_ON(iova & invalid_mask);
+ BUG_ON(!IS_ALIGNED(iova, size));
return iommu_ops->unmap(domain, iova, gfp_order);
}
#include <plat/iommu.h>
#include <plat/iovmm.h>
-#include "iopgtable.h"
+#include <plat/iopgtable.h>
#define MAXCOLUMN 100 /* for short messages */
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);
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;
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);
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;
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);
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));
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__);
__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;
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;
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);
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;
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;
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;
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;
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)
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;
#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;
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;
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;
return err;
}
-static void iommu_disable(struct iommu *obj)
+static void iommu_disable(struct omap_iommu *obj)
{
if (!obj)
return;
/*
* 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)
{
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)
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;
}
-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;
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);
* @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);
}
/* 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;
* @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;
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
*
* 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;
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;
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_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;
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;
}
/**
- * 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;
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 */
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;
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);
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;
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);
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);
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;
}
/**
- * 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
* @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;
*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);
* @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;
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;
{
u32 da, errs;
u32 *iopgd, *iopte;
- struct iommu *obj = data;
+ struct omap_iommu *obj = data;
if (!obj->refcount)
return IRQ_NONE;
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);
}
/**
- * 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;
-
- dev = driver_find_device(&omap_iommu_driver.driver, NULL, (void *)name,
- device_match_by_alias);
- if (!dev)
- return ERR_PTR(-ENODEV);
-
- obj = to_iommu(dev);
+ struct omap_iommu *obj = to_iommu(dev);
- mutex_lock(&obj->iommu_lock);
+ spin_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;
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,
+int omap_iommu_set_isr(const char *name,
+ int (*isr)(struct omap_iommu *obj, u32 da, u32 iommu_errs,
void *priv),
void *isr_priv)
{
struct device *dev;
- struct iommu *obj;
+ struct omap_iommu *obj;
dev = driver_find_device(&omap_iommu_driver.driver, NULL, (void *)name,
device_match_by_alias);
return -ENODEV;
obj = to_iommu(dev);
- mutex_lock(&obj->iommu_lock);
+ spin_lock(&obj->iommu_lock);
if (obj->refcount != 0) {
- mutex_unlock(&obj->iommu_lock);
+ spin_unlock(&obj->iommu_lock);
return -EBUSY;
}
obj->isr = isr;
obj->isr_priv = isr_priv;
- mutex_unlock(&obj->iommu_lock);
+ spin_unlock(&obj->iommu_lock);
return 0;
}
-EXPORT_SYMBOL_GPL(iommu_set_isr);
+EXPORT_SYMBOL_GPL(omap_iommu_set_isr);
/*
* OMAP Device MMU(IOMMU) detection
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;
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);
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:
{
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);
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;
+
+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;
return -ENOMEM;
iopte_cachep = p;
+ register_iommu(&omap_iommu_ops);
+
return platform_driver_register(&omap_iommu_driver);
}
module_init(omap_iommu_init);
#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>
#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)
{
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;
}
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);
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;
}
/**
- * 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;
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;
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;
}
/**
- * 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;
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)
{
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);
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;
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;
}
}
/* 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 = sg->length + sg->offset;
+ order = get_order(bytes);
+
+ err = iommu_unmap(domain, start, order);
+ if (err < 0)
+ break;
- bytes = iopgtable_clear_entry(obj, start);
- if (bytes == 0)
- bytes = PAGE_SIZE;
- else
- dev_dbg(obj->dev, "%s: unmap %08x(%x) %08x\n",
+ dev_dbg(obj->dev, "%s: unmap %08x(%x) %08x\n",
__func__, start, bytes, area->flags);
BUG_ON(!IS_ALIGNED(bytes, PAGE_SIZE));
}
/* 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;
}
sgt = (struct sg_table *)area->sgt;
- unmap_iovm_area(obj, area);
+ unmap_iovm_area(domain, obj, area);
fn(area->va);
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;
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);
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
* 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;
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
* 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;
}
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;
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)
{
config VIDEO_OMAP3
tristate "OMAP 3 Camera support (EXPERIMENTAL)"
- select OMAP_IOMMU
+ select OMAP_IOVMM
depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API && ARCH_OMAP3 && EXPERIMENTAL
---help---
Driver for an OMAP 3 camera controller.
#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");
{
isp_save_context(isp, isp_reg_list);
if (isp->iommu)
- iommu_save_ctx(isp->iommu);
+ omap_iommu_save_ctx(isp->iommu);
}
/*
{
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);
}
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);
}
/* 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();
+ 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 */
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);
#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>
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;
};
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);
}
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;
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;
/*
* 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;
}
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);
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);
}
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;
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 "
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)) {
}
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."
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);
{
struct sg_table *sgt;
- sgt = iommu_vunmap(isp->iommu, (u32)da);
+ sgt = omap_iommu_vunmap(isp->domain, isp->iommu, (u32)da);
kfree(sgt);
}
#endif
};
+typedef bool (*match_fn)(struct dma_debug_entry *, struct dma_debug_entry *);
+
struct hash_bucket {
struct list_head list;
spinlock_t lock;
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;
/*
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
*/
}
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 "
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 "
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)
git.openpandora.org / pandora-kernel.git / commitdiff