Maemo patchset 20101501+0m5

[h-e-n] / arch / arm / plat-omap / include / mach / iommu.h

diff --git a/arch/arm/plat-omap/include/mach/iommu.h b/arch/arm/plat-omap/include/mach/iommu.h
new file mode 100644 (file)
index 0000000..ac42b59
--- /dev/null
+++ b/arch/arm/plat-omap/include/mach/iommu.h
@@ -0,0 +1,164 @@
+/*
+ * omap iommu: main structures
+ *
+ * Copyright (C) 2008-2009 Nokia Corporation
+ *
+ * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __MACH_IOMMU_H
+#define __MACH_IOMMU_H
+
+struct iotlb_entry {
+       u32 da;
+       u32 pa;
+       u32 pgsz, prsvd, valid;
+       union {
+               u16 ap;
+               struct {
+                       u32 endian, elsz, mixed;
+               };
+       };
+};
+
+struct iommu {
+       const char      *name;
+       struct module   *owner;
+       struct clk      *clk;
+       void __iomem    *regbase;
+       struct device   *dev;
+
+       unsigned int    refcount;
+       struct mutex    iommu_lock;     /* global for this whole object */
+
+       /*
+        * We don't change iopgd for a situation like pgd for a task,
+        * but share it globally for each iommu.
+        */
+       u32             *iopgd;
+       spinlock_t      page_table_lock; /* protect iopgd */
+
+       int             nr_tlb_entries;
+
+       struct list_head        mmap;
+       struct mutex            mmap_lock; /* protect mmap */
+
+       int (*isr)(struct iommu *obj);
+
+       void *ctx; /* iommu context: registres saved area */
+};
+
+struct cr_regs {
+       union {
+               struct {
+                       u16 cam_l;
+                       u16 cam_h;
+               };
+               u32 cam;
+       };
+       union {
+               struct {
+                       u16 ram_l;
+                       u16 ram_h;
+               };
+               u32 ram;
+       };
+};
+
+struct iotlb_lock {
+       short base;
+       short vict;
+};
+
+/* architecture specific functions */
+struct iommu_functions {
+       unsigned long   version;
+
+       int (*enable)(struct iommu *obj);
+       void (*disable)(struct iommu *obj);
+       u32 (*fault_isr)(struct 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);
+
+       struct cr_regs *(*alloc_cr)(struct 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);
+
+       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);
+};
+
+struct iommu_platform_data {
+       const char *name;
+       const char *clk_name;
+       const int nr_tlb_entries;
+};
+
+#include <mach/iommu2.h>
+
+/*
+ * utilities for super page(16MB, 1MB, 64KB and 4KB)
+ */
+
+#define iopgsz_max(bytes)                      \
+       (((bytes) >= SZ_16M) ? SZ_16M :         \
+        ((bytes) >= SZ_1M)  ? SZ_1M  :         \
+        ((bytes) >= SZ_64K) ? SZ_64K :         \
+        ((bytes) >= SZ_4K)  ? SZ_4K  : 0)
+
+#define bytes_to_iopgsz(bytes)                         \
+       (((bytes) == SZ_16M) ? MMU_CAM_PGSZ_16M :       \
+        ((bytes) == SZ_1M)  ? MMU_CAM_PGSZ_1M  :       \
+        ((bytes) == SZ_64K) ? MMU_CAM_PGSZ_64K :       \
+        ((bytes) == SZ_4K)  ? MMU_CAM_PGSZ_4K  : -1)
+
+#define iopgsz_to_bytes(iopgsz)                                \
+       (((iopgsz) == MMU_CAM_PGSZ_16M) ? SZ_16M :      \
+        ((iopgsz) == MMU_CAM_PGSZ_1M)  ? SZ_1M  :      \
+        ((iopgsz) == MMU_CAM_PGSZ_64K) ? SZ_64K :      \
+        ((iopgsz) == MMU_CAM_PGSZ_4K)  ? SZ_4K  : 0)
+
+#define iopgsz_ok(bytes) (bytes_to_iopgsz(bytes) >= 0)
+
+/*
+ * 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 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 size_t iopgtable_clear_entry(struct iommu *obj, u32 iova);
+
+extern struct iommu *iommu_get(const char *name);
+extern void iommu_put(struct iommu *obj);
+
+extern void iommu_save_ctx(struct iommu *obj);
+extern void iommu_restore_ctx(struct iommu *obj);
+
+extern int install_iommu_arch(const struct iommu_functions *ops);
+extern void uninstall_iommu_arch(const struct iommu_functions *ops);
+
+extern int foreach_iommu_device(void *data,
+                               int (*fn)(struct device *, void *));
+
+extern ssize_t iommu_dump_ctx(struct iommu *obj, char *buf);
+extern size_t dump_tlb_entries(struct iommu *obj, char *buf);
+
+#endif /* __MACH_IOMMU_H */