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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2009-05-25 05:15:59 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-05-25 05:20:21 -0400
commit56a459314a982bae75b9bce64bcca853d378ca7e (patch)
tree07d9121fb08229ebe2ac2f4420cec70434c7bbba /arch/arm/plat-omap/include
parentfc05505b77f7900a1bb74fb3f3a4343dee4265a4 (diff)
parent5c651ffaee6f07aa1f5e6d0763845a2ee606b6bd (diff)
Merge branch 'iommu' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6.git into devel
Diffstat (limited to 'arch/arm/plat-omap/include')
-rw-r--r--arch/arm/plat-omap/include/mach/iommu.h168
-rw-r--r--arch/arm/plat-omap/include/mach/iommu2.h96
-rw-r--r--arch/arm/plat-omap/include/mach/iovmm.h94
3 files changed, 358 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/include/mach/iommu.h b/arch/arm/plat-omap/include/mach/iommu.h
new file mode 100644
index 000000000000..769b00b4c34a
--- /dev/null
+++ b/arch/arm/plat-omap/include/mach/iommu.h
@@ -0,0 +1,168 @@
1/*
2 * omap iommu: main structures
3 *
4 * Copyright (C) 2008-2009 Nokia Corporation
5 *
6 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#ifndef __MACH_IOMMU_H
14#define __MACH_IOMMU_H
15
16struct iotlb_entry {
17 u32 da;
18 u32 pa;
19 u32 pgsz, prsvd, valid;
20 union {
21 u16 ap;
22 struct {
23 u32 endian, elsz, mixed;
24 };
25 };
26};
27
28struct iommu {
29 const char *name;
30 struct module *owner;
31 struct clk *clk;
32 void __iomem *regbase;
33 struct device *dev;
34
35 unsigned int refcount;
36 struct mutex iommu_lock; /* global for this whole object */
37
38 /*
39 * We don't change iopgd for a situation like pgd for a task,
40 * but share it globally for each iommu.
41 */
42 u32 *iopgd;
43 spinlock_t page_table_lock; /* protect iopgd */
44
45 int nr_tlb_entries;
46
47 struct list_head mmap;
48 struct mutex mmap_lock; /* protect mmap */
49
50 int (*isr)(struct iommu *obj);
51
52 void *ctx; /* iommu context: registres saved area */
53};
54
55struct cr_regs {
56 union {
57 struct {
58 u16 cam_l;
59 u16 cam_h;
60 };
61 u32 cam;
62 };
63 union {
64 struct {
65 u16 ram_l;
66 u16 ram_h;
67 };
68 u32 ram;
69 };
70};
71
72struct iotlb_lock {
73 short base;
74 short vict;
75};
76
77/* architecture specific functions */
78struct iommu_functions {
79 unsigned long version;
80
81 int (*enable)(struct iommu *obj);
82 void (*disable)(struct iommu *obj);
83 u32 (*fault_isr)(struct iommu *obj, u32 *ra);
84
85 void (*tlb_read_cr)(struct iommu *obj, struct cr_regs *cr);
86 void (*tlb_load_cr)(struct iommu *obj, struct cr_regs *cr);
87
88 struct cr_regs *(*alloc_cr)(struct iommu *obj, struct iotlb_entry *e);
89 int (*cr_valid)(struct cr_regs *cr);
90 u32 (*cr_to_virt)(struct cr_regs *cr);
91 void (*cr_to_e)(struct cr_regs *cr, struct iotlb_entry *e);
92 ssize_t (*dump_cr)(struct iommu *obj, struct cr_regs *cr, char *buf);
93
94 u32 (*get_pte_attr)(struct iotlb_entry *e);
95
96 void (*save_ctx)(struct iommu *obj);
97 void (*restore_ctx)(struct iommu *obj);
98 ssize_t (*dump_ctx)(struct iommu *obj, char *buf);
99};
100
101struct iommu_platform_data {
102 const char *name;
103 const char *clk_name;
104 const int nr_tlb_entries;
105};
106
107#if defined(CONFIG_ARCH_OMAP1)
108#error "iommu for this processor not implemented yet"
109#else
110#include <mach/iommu2.h>
111#endif
112
113/*
114 * utilities for super page(16MB, 1MB, 64KB and 4KB)
115 */
116
117#define iopgsz_max(bytes) \
118 (((bytes) >= SZ_16M) ? SZ_16M : \
119 ((bytes) >= SZ_1M) ? SZ_1M : \
120 ((bytes) >= SZ_64K) ? SZ_64K : \
121 ((bytes) >= SZ_4K) ? SZ_4K : 0)
122
123#define bytes_to_iopgsz(bytes) \
124 (((bytes) == SZ_16M) ? MMU_CAM_PGSZ_16M : \
125 ((bytes) == SZ_1M) ? MMU_CAM_PGSZ_1M : \
126 ((bytes) == SZ_64K) ? MMU_CAM_PGSZ_64K : \
127 ((bytes) == SZ_4K) ? MMU_CAM_PGSZ_4K : -1)
128
129#define iopgsz_to_bytes(iopgsz) \
130 (((iopgsz) == MMU_CAM_PGSZ_16M) ? SZ_16M : \
131 ((iopgsz) == MMU_CAM_PGSZ_1M) ? SZ_1M : \
132 ((iopgsz) == MMU_CAM_PGSZ_64K) ? SZ_64K : \
133 ((iopgsz) == MMU_CAM_PGSZ_4K) ? SZ_4K : 0)
134
135#define iopgsz_ok(bytes) (bytes_to_iopgsz(bytes) >= 0)
136
137/*
138 * global functions
139 */
140extern u32 iommu_arch_version(void);
141
142extern void iotlb_cr_to_e(struct cr_regs *cr, struct iotlb_entry *e);
143extern u32 iotlb_cr_to_virt(struct cr_regs *cr);
144
145extern int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e);
146extern void flush_iotlb_page(struct iommu *obj, u32 da);
147extern void flush_iotlb_range(struct iommu *obj, u32 start, u32 end);
148extern void flush_iotlb_all(struct iommu *obj);
149
150extern int iopgtable_store_entry(struct iommu *obj, struct iotlb_entry *e);
151extern size_t iopgtable_clear_entry(struct iommu *obj, u32 iova);
152
153extern struct iommu *iommu_get(const char *name);
154extern void iommu_put(struct iommu *obj);
155
156extern void iommu_save_ctx(struct iommu *obj);
157extern void iommu_restore_ctx(struct iommu *obj);
158
159extern int install_iommu_arch(const struct iommu_functions *ops);
160extern void uninstall_iommu_arch(const struct iommu_functions *ops);
161
162extern int foreach_iommu_device(void *data,
163 int (*fn)(struct device *, void *));
164
165extern ssize_t iommu_dump_ctx(struct iommu *obj, char *buf);
166extern size_t dump_tlb_entries(struct iommu *obj, char *buf);
167
168#endif /* __MACH_IOMMU_H */
diff --git a/arch/arm/plat-omap/include/mach/iommu2.h b/arch/arm/plat-omap/include/mach/iommu2.h
new file mode 100644
index 000000000000..10ad05f410e9
--- /dev/null
+++ b/arch/arm/plat-omap/include/mach/iommu2.h
@@ -0,0 +1,96 @@
1/*
2 * omap iommu: omap2 architecture specific definitions
3 *
4 * Copyright (C) 2008-2009 Nokia Corporation
5 *
6 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#ifndef __MACH_IOMMU2_H
14#define __MACH_IOMMU2_H
15
16#include <linux/io.h>
17
18/*
19 * MMU Register offsets
20 */
21#define MMU_REVISION 0x00
22#define MMU_SYSCONFIG 0x10
23#define MMU_SYSSTATUS 0x14
24#define MMU_IRQSTATUS 0x18
25#define MMU_IRQENABLE 0x1c
26#define MMU_WALKING_ST 0x40
27#define MMU_CNTL 0x44
28#define MMU_FAULT_AD 0x48
29#define MMU_TTB 0x4c
30#define MMU_LOCK 0x50
31#define MMU_LD_TLB 0x54
32#define MMU_CAM 0x58
33#define MMU_RAM 0x5c
34#define MMU_GFLUSH 0x60
35#define MMU_FLUSH_ENTRY 0x64
36#define MMU_READ_CAM 0x68
37#define MMU_READ_RAM 0x6c
38#define MMU_EMU_FAULT_AD 0x70
39
40#define MMU_REG_SIZE 256
41
42/*
43 * MMU Register bit definitions
44 */
45#define MMU_LOCK_BASE_SHIFT 10
46#define MMU_LOCK_BASE_MASK (0x1f << MMU_LOCK_BASE_SHIFT)
47#define MMU_LOCK_BASE(x) \
48 ((x & MMU_LOCK_BASE_MASK) >> MMU_LOCK_BASE_SHIFT)
49
50#define MMU_LOCK_VICT_SHIFT 4
51#define MMU_LOCK_VICT_MASK (0x1f << MMU_LOCK_VICT_SHIFT)
52#define MMU_LOCK_VICT(x) \
53 ((x & MMU_LOCK_VICT_MASK) >> MMU_LOCK_VICT_SHIFT)
54
55#define MMU_CAM_VATAG_SHIFT 12
56#define MMU_CAM_VATAG_MASK \
57 ((~0UL >> MMU_CAM_VATAG_SHIFT) << MMU_CAM_VATAG_SHIFT)
58#define MMU_CAM_P (1 << 3)
59#define MMU_CAM_V (1 << 2)
60#define MMU_CAM_PGSZ_MASK 3
61#define MMU_CAM_PGSZ_1M (0 << 0)
62#define MMU_CAM_PGSZ_64K (1 << 0)
63#define MMU_CAM_PGSZ_4K (2 << 0)
64#define MMU_CAM_PGSZ_16M (3 << 0)
65
66#define MMU_RAM_PADDR_SHIFT 12
67#define MMU_RAM_PADDR_MASK \
68 ((~0UL >> MMU_RAM_PADDR_SHIFT) << MMU_RAM_PADDR_SHIFT)
69#define MMU_RAM_ENDIAN_SHIFT 9
70#define MMU_RAM_ENDIAN_MASK (1 << MMU_RAM_ENDIAN_SHIFT)
71#define MMU_RAM_ENDIAN_BIG (1 << MMU_RAM_ENDIAN_SHIFT)
72#define MMU_RAM_ENDIAN_LITTLE (0 << MMU_RAM_ENDIAN_SHIFT)
73#define MMU_RAM_ELSZ_SHIFT 7
74#define MMU_RAM_ELSZ_MASK (3 << MMU_RAM_ELSZ_SHIFT)
75#define MMU_RAM_ELSZ_8 (0 << MMU_RAM_ELSZ_SHIFT)
76#define MMU_RAM_ELSZ_16 (1 << MMU_RAM_ELSZ_SHIFT)
77#define MMU_RAM_ELSZ_32 (2 << MMU_RAM_ELSZ_SHIFT)
78#define MMU_RAM_ELSZ_NONE (3 << MMU_RAM_ELSZ_SHIFT)
79#define MMU_RAM_MIXED_SHIFT 6
80#define MMU_RAM_MIXED_MASK (1 << MMU_RAM_MIXED_SHIFT)
81#define MMU_RAM_MIXED MMU_RAM_MIXED_MASK
82
83/*
84 * register accessors
85 */
86static inline u32 iommu_read_reg(struct iommu *obj, size_t offs)
87{
88 return __raw_readl(obj->regbase + offs);
89}
90
91static inline void iommu_write_reg(struct iommu *obj, u32 val, size_t offs)
92{
93 __raw_writel(val, obj->regbase + offs);
94}
95
96#endif /* __MACH_IOMMU2_H */
diff --git a/arch/arm/plat-omap/include/mach/iovmm.h b/arch/arm/plat-omap/include/mach/iovmm.h
new file mode 100644
index 000000000000..bdc7ce5d7a4a
--- /dev/null
+++ b/arch/arm/plat-omap/include/mach/iovmm.h
@@ -0,0 +1,94 @@
1/*
2 * omap iommu: simple virtual address space management
3 *
4 * Copyright (C) 2008-2009 Nokia Corporation
5 *
6 * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#ifndef __IOMMU_MMAP_H
14#define __IOMMU_MMAP_H
15
16struct iovm_struct {
17 struct iommu *iommu; /* iommu object which this belongs to */
18 u32 da_start; /* area definition */
19 u32 da_end;
20 u32 flags; /* IOVMF_: see below */
21 struct list_head list; /* linked in ascending order */
22 const struct sg_table *sgt; /* keep 'page' <-> 'da' mapping */
23 void *va; /* mpu side mapped address */
24};
25
26/*
27 * IOVMF_FLAGS: attribute for iommu virtual memory area(iovma)
28 *
29 * lower 16 bit is used for h/w and upper 16 bit is for s/w.
30 */
31#define IOVMF_SW_SHIFT 16
32#define IOVMF_HW_SIZE (1 << IOVMF_SW_SHIFT)
33#define IOVMF_HW_MASK (IOVMF_HW_SIZE - 1)
34#define IOVMF_SW_MASK (~IOVMF_HW_MASK)UL
35
36/*
37 * iovma: h/w flags derived from cam and ram attribute
38 */
39#define IOVMF_CAM_MASK (~((1 << 10) - 1))
40#define IOVMF_RAM_MASK (~IOVMF_CAM_MASK)
41
42#define IOVMF_PGSZ_MASK (3 << 0)
43#define IOVMF_PGSZ_1M MMU_CAM_PGSZ_1M
44#define IOVMF_PGSZ_64K MMU_CAM_PGSZ_64K
45#define IOVMF_PGSZ_4K MMU_CAM_PGSZ_4K
46#define IOVMF_PGSZ_16M MMU_CAM_PGSZ_16M
47
48#define IOVMF_ENDIAN_MASK (1 << 9)
49#define IOVMF_ENDIAN_BIG MMU_RAM_ENDIAN_BIG
50#define IOVMF_ENDIAN_LITTLE MMU_RAM_ENDIAN_LITTLE
51
52#define IOVMF_ELSZ_MASK (3 << 7)
53#define IOVMF_ELSZ_8 MMU_RAM_ELSZ_8
54#define IOVMF_ELSZ_16 MMU_RAM_ELSZ_16
55#define IOVMF_ELSZ_32 MMU_RAM_ELSZ_32
56#define IOVMF_ELSZ_NONE MMU_RAM_ELSZ_NONE
57
58#define IOVMF_MIXED_MASK (1 << 6)
59#define IOVMF_MIXED MMU_RAM_MIXED
60
61/*
62 * iovma: s/w flags, used for mapping and umapping internally.
63 */
64#define IOVMF_MMIO (1 << IOVMF_SW_SHIFT)
65#define IOVMF_ALLOC (2 << IOVMF_SW_SHIFT)
66#define IOVMF_ALLOC_MASK (3 << IOVMF_SW_SHIFT)
67
68/* "superpages" is supported just with physically linear pages */
69#define IOVMF_DISCONT (1 << (2 + IOVMF_SW_SHIFT))
70#define IOVMF_LINEAR (2 << (2 + IOVMF_SW_SHIFT))
71#define IOVMF_LINEAR_MASK (3 << (2 + IOVMF_SW_SHIFT))
72
73#define IOVMF_DA_FIXED (1 << (4 + IOVMF_SW_SHIFT))
74#define IOVMF_DA_ANON (2 << (4 + IOVMF_SW_SHIFT))
75#define IOVMF_DA_MASK (3 << (4 + IOVMF_SW_SHIFT))
76
77
78extern struct iovm_struct *find_iovm_area(struct iommu *obj, u32 da);
79extern u32 iommu_vmap(struct iommu *obj, u32 da,
80 const struct sg_table *sgt, u32 flags);
81extern struct sg_table *iommu_vunmap(struct iommu *obj, u32 da);
82extern u32 iommu_vmalloc(struct iommu *obj, u32 da, size_t bytes,
83 u32 flags);
84extern void iommu_vfree(struct iommu *obj, const u32 da);
85extern u32 iommu_kmap(struct iommu *obj, u32 da, u32 pa, size_t bytes,
86 u32 flags);
87extern void iommu_kunmap(struct iommu *obj, u32 da);
88extern u32 iommu_kmalloc(struct iommu *obj, u32 da, size_t bytes,
89 u32 flags);
90extern void iommu_kfree(struct iommu *obj, u32 da);
91
92extern void *da_to_va(struct iommu *obj, u32 da);
93
94#endif /* __IOMMU_MMAP_H */
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