diff options
Diffstat (limited to 'arch/arm/plat-omap')
| -rw-r--r-- | arch/arm/plat-omap/Kconfig | 12 | ||||
| -rw-r--r-- | arch/arm/plat-omap/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/iommu.h | 78 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/iommu2.h | 4 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/iopgtable.h (renamed from arch/arm/plat-omap/iopgtable.h) | 20 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/iovmm.h | 30 | ||||
| -rw-r--r-- | arch/arm/plat-omap/iommu-debug.c | 418 | ||||
| -rw-r--r-- | arch/arm/plat-omap/iommu.c | 1102 | ||||
| -rw-r--r-- | arch/arm/plat-omap/iovmm.c | 904 |
9 files changed, 71 insertions, 2499 deletions
diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig index 6f4edd3408c2..aa59f4247dc5 100644 --- a/arch/arm/plat-omap/Kconfig +++ b/arch/arm/plat-omap/Kconfig @@ -134,18 +134,6 @@ 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 diff --git a/arch/arm/plat-omap/Makefile b/arch/arm/plat-omap/Makefile index f0233e6abcdf..985262242f25 100644 --- a/arch/arm/plat-omap/Makefile +++ b/arch/arm/plat-omap/Makefile @@ -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 diff --git a/arch/arm/plat-omap/include/plat/iommu.h b/arch/arm/plat-omap/include/plat/iommu.h index 174f1b9c8c03..a1d79ee19250 100644 --- a/arch/arm/plat-omap/include/plat/iommu.h +++ b/arch/arm/plat-omap/include/plat/iommu.h @@ -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 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 */ diff --git a/arch/arm/plat-omap/include/plat/iommu2.h b/arch/arm/plat-omap/include/plat/iommu2.h index 10ad05f410e9..d4116b595e40 100644 --- a/arch/arm/plat-omap/include/plat/iommu2.h +++ b/arch/arm/plat-omap/include/plat/iommu2.h @@ -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); } diff --git a/arch/arm/plat-omap/iopgtable.h b/arch/arm/plat-omap/include/plat/iopgtable.h index c3e93bb0911f..66a813977d52 100644 --- a/arch/arm/plat-omap/iopgtable.h +++ b/arch/arm/plat-omap/include/plat/iopgtable.h @@ -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 */ diff --git a/arch/arm/plat-omap/include/plat/iovmm.h b/arch/arm/plat-omap/include/plat/iovmm.h index e992b9655fbc..6af1a91c0f36 100644 --- a/arch/arm/plat-omap/include/plat/iovmm.h +++ b/arch/arm/plat-omap/include/plat/iovmm.h @@ -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 */ diff --git a/arch/arm/plat-omap/iommu-debug.c b/arch/arm/plat-omap/iommu-debug.c deleted file mode 100644 index f07cf2f08e09..000000000000 --- a/arch/arm/plat-omap/iommu-debug.c +++ /dev/null @@ -1,418 +0,0 @@ -/* - * omap iommu: debugfs interface - * - * 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. - */ - -#include <linux/err.h> -#include <linux/clk.h> -#include <linux/io.h> -#include <linux/slab.h> -#include <linux/uaccess.h> -#include <linux/platform_device.h> -#include <linux/debugfs.h> - -#include <plat/iommu.h> -#include <plat/iovmm.h> - -#include "iopgtable.h" - -#define MAXCOLUMN 100 /* for short messages */ - -static DEFINE_MUTEX(iommu_debug_lock); - -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(); - char buf[MAXCOLUMN], *p = buf; - - p += sprintf(p, "H/W version: %d.%d\n", (ver >> 4) & 0xf , ver & 0xf); - - return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); -} - -static ssize_t debug_read_regs(struct file *file, char __user *userbuf, - size_t count, loff_t *ppos) -{ - struct iommu *obj = file->private_data; - char *p, *buf; - ssize_t bytes; - - buf = kmalloc(count, GFP_KERNEL); - if (!buf) - return -ENOMEM; - p = buf; - - mutex_lock(&iommu_debug_lock); - - bytes = iommu_dump_ctx(obj, p, count); - bytes = simple_read_from_buffer(userbuf, count, ppos, buf, bytes); - - mutex_unlock(&iommu_debug_lock); - kfree(buf); - - return bytes; -} - -static ssize_t debug_read_tlb(struct file *file, char __user *userbuf, - size_t count, loff_t *ppos) -{ - struct iommu *obj = file->private_data; - char *p, *buf; - ssize_t bytes, rest; - - buf = kmalloc(count, GFP_KERNEL); - if (!buf) - return -ENOMEM; - p = buf; - - mutex_lock(&iommu_debug_lock); - - p += sprintf(p, "%8s %8s\n", "cam:", "ram:"); - p += sprintf(p, "-----------------------------------------\n"); - rest = count - (p - buf); - p += dump_tlb_entries(obj, p, rest); - - bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); - - mutex_unlock(&iommu_debug_lock); - kfree(buf); - - return bytes; -} - -static ssize_t debug_write_pagetable(struct file *file, - const char __user *userbuf, size_t count, loff_t *ppos) -{ - struct iotlb_entry e; - struct cr_regs cr; - int err; - struct iommu *obj = file->private_data; - char buf[MAXCOLUMN], *p = buf; - - count = min(count, sizeof(buf)); - - mutex_lock(&iommu_debug_lock); - if (copy_from_user(p, userbuf, count)) { - mutex_unlock(&iommu_debug_lock); - return -EFAULT; - } - - sscanf(p, "%x %x", &cr.cam, &cr.ram); - if (!cr.cam || !cr.ram) { - mutex_unlock(&iommu_debug_lock); - return -EINVAL; - } - - iotlb_cr_to_e(&cr, &e); - err = iopgtable_store_entry(obj, &e); - if (err) - dev_err(obj->dev, "%s: fail to store cr\n", __func__); - - mutex_unlock(&iommu_debug_lock); - return count; -} - -#define dump_ioptable_entry_one(lv, da, val) \ - ({ \ - int __err = 0; \ - ssize_t bytes; \ - const int maxcol = 22; \ - const char *str = "%d: %08x %08x\n"; \ - bytes = snprintf(p, maxcol, str, lv, da, val); \ - p += bytes; \ - len -= bytes; \ - if (len < maxcol) \ - __err = -ENOMEM; \ - __err; \ - }) - -static ssize_t dump_ioptable(struct iommu *obj, char *buf, ssize_t len) -{ - int i; - u32 *iopgd; - char *p = buf; - - spin_lock(&obj->page_table_lock); - - iopgd = iopgd_offset(obj, 0); - for (i = 0; i < PTRS_PER_IOPGD; i++, iopgd++) { - int j, err; - u32 *iopte; - u32 da; - - if (!*iopgd) - continue; - - if (!(*iopgd & IOPGD_TABLE)) { - da = i << IOPGD_SHIFT; - - err = dump_ioptable_entry_one(1, da, *iopgd); - if (err) - goto out; - continue; - } - - iopte = iopte_offset(iopgd, 0); - - for (j = 0; j < PTRS_PER_IOPTE; j++, iopte++) { - if (!*iopte) - continue; - - da = (i << IOPGD_SHIFT) + (j << IOPTE_SHIFT); - err = dump_ioptable_entry_one(2, da, *iopgd); - if (err) - goto out; - } - } -out: - spin_unlock(&obj->page_table_lock); - - return p - buf; -} - -static ssize_t debug_read_pagetable(struct file *file, char __user *userbuf, - size_t count, loff_t *ppos) -{ - struct iommu *obj = file->private_data; - char *p, *buf; - size_t bytes; - - buf = (char *)__get_free_page(GFP_KERNEL); - if (!buf) - return -ENOMEM; - p = buf; - - p += sprintf(p, "L: %8s %8s\n", "da:", "pa:"); - p += sprintf(p, "-----------------------------------------\n"); - - mutex_lock(&iommu_debug_lock); - - bytes = PAGE_SIZE - (p - buf); - p += dump_ioptable(obj, p, bytes); - - bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); - - mutex_unlock(&iommu_debug_lock); - free_page((unsigned long)buf); - - return 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; - char *p, *buf; - struct iovm_struct *tmp; - int uninitialized_var(i); - ssize_t bytes; - - buf = (char *)__get_free_page(GFP_KERNEL); - if (!buf) - return -ENOMEM; - p = buf; - - p += sprintf(p, "%-3s %-8s %-8s %6s %8s\n", - "No", "start", "end", "size", "flags"); - p += sprintf(p, "-------------------------------------------------\n"); - - mutex_lock(&iommu_debug_lock); - - list_for_each_entry(tmp, &obj->mmap, list) { - size_t len; - const char *str = "%3d %08x-%08x %6x %8x\n"; - const int maxcol = 39; - - len = tmp->da_end - tmp->da_start; - p += snprintf(p, maxcol, str, - i, tmp->da_start, tmp->da_end, len, tmp->flags); - - if (PAGE_SIZE - (p - buf) < maxcol) - break; - i++; - } - - bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); - - mutex_unlock(&iommu_debug_lock); - free_page((unsigned long)buf); - - return bytes; -} - -static ssize_t debug_read_mem(struct file *file, char __user *userbuf, - size_t count, loff_t *ppos) -{ - struct iommu *obj = file->private_data; - char *p, *buf; - struct iovm_struct *area; - ssize_t bytes; - - count = min_t(ssize_t, count, PAGE_SIZE); - - buf = (char *)__get_free_page(GFP_KERNEL); - if (!buf) - return -ENOMEM; - p = buf; - - mutex_lock(&iommu_debug_lock); - - area = find_iovm_area(obj, (u32)ppos); - if (IS_ERR(area)) { - bytes = -EINVAL; - goto err_out; - } - memcpy(p, area->va, count); - p += count; - - bytes = simple_read_from_buffer(userbuf, count, ppos, buf, p - buf); -err_out: - mutex_unlock(&iommu_debug_lock); - free_page((unsigned long)buf); - - return bytes; -} - -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 iovm_struct *area; - char *p, *buf; - - count = min_t(size_t, count, PAGE_SIZE); - - buf = (char *)__get_free_page(GFP_KERNEL); - if (!buf) - return -ENOMEM; - p = buf; - - mutex_lock(&iommu_debug_lock); - - if (copy_from_user(p, userbuf, count)) { - count = -EFAULT; - goto err_out; - } - - area = find_iovm_area(obj, (u32)ppos); - if (IS_ERR(area)) { - count = -EINVAL; - goto err_out; - } - memcpy(area->va, p, count); -err_out: - mutex_unlock(&iommu_debug_lock); - free_page((unsigned long)buf); - - return count; -} - -static int debug_open_generic(struct inode *inode, struct file *file) -{ - file->private_data = inode->i_private; - return 0; -} - -#define DEBUG_FOPS(name) \ - static const struct file_operations debug_##name##_fops = { \ - .open = debug_open_generic, \ - .read = debug_read_##name, \ - .write = debug_write_##name, \ - .llseek = generic_file_llseek, \ - }; - -#define DEBUG_FOPS_RO(name) \ - static const struct file_operations debug_##name##_fops = { \ - .open = debug_open_generic, \ - .read = debug_read_##name, \ - .llseek = generic_file_llseek, \ - }; - -DEBUG_FOPS_RO(ver); -DEBUG_FOPS_RO(regs); -DEBUG_FOPS_RO(tlb); -DEBUG_FOPS(pagetable); -DEBUG_FOPS_RO(mmap); -DEBUG_FOPS(mem); - -#define __DEBUG_ADD_FILE(attr, mode) \ - { \ - struct dentry *dent; \ - dent = debugfs_create_file(#attr, mode, parent, \ - obj, &debug_##attr##_fops); \ - if (!dent) \ - return -ENOMEM; \ - } - -#define DEBUG_ADD_FILE(name) __DEBUG_ADD_FILE(name, 600) -#define DEBUG_ADD_FILE_RO(name) __DEBUG_ADD_FILE(name, 400) - -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 dentry *d, *parent; - - if (!obj || !obj->dev) - return -EINVAL; - - d = debugfs_create_dir(obj->name, iommu_debug_root); - if (!d) - return -ENOMEM; - parent = d; - - d = debugfs_create_u8("nr_tlb_entries", 400, parent, - (u8 *)&obj->nr_tlb_entries); - if (!d) - return -ENOMEM; - - DEBUG_ADD_FILE_RO(ver); - DEBUG_ADD_FILE_RO(regs); - DEBUG_ADD_FILE_RO(tlb); - DEBUG_ADD_FILE(pagetable); - DEBUG_ADD_FILE_RO(mmap); - DEBUG_ADD_FILE(mem); - - return 0; -} - -static int __init iommu_debug_init(void) -{ - struct dentry *d; - int err; - - d = debugfs_create_dir("iommu", NULL); - if (!d) - return -ENOMEM; - iommu_debug_root = d; - - err = foreach_iommu_device(d, iommu_debug_register); - if (err) - goto err_out; - return 0; - -err_out: - debugfs_remove_recursive(iommu_debug_root); - return err; -} -module_init(iommu_debug_init) - -static void __exit iommu_debugfs_exit(void) -{ - debugfs_remove_recursive(iommu_debug_root); -} -module_exit(iommu_debugfs_exit) - -MODULE_DESCRIPTION("omap iommu: debugfs interface"); -MODULE_AUTHOR("Hiroshi DOYU <Hiroshi.DOYU@nokia.com>"); -MODULE_LICENSE("GPL v2"); diff --git a/arch/arm/plat-omap/iommu.c b/arch/arm/plat-omap/iommu.c deleted file mode 100644 index 34fc31ee9081..000000000000 --- a/arch/arm/plat-omap/iommu.c +++ /dev/null @@ -1,1102 +0,0 @@ -/* - * omap iommu: tlb and pagetable primitives - * - * Copyright (C) 2008-2010 Nokia Corporation - * - * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>, - * Paul Mundt and Toshihiro Kobayashi - * - * 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. - */ - -#include <linux/err.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/clk.h> -#include <linux/platform_device.h> - -#include <asm/cacheflush.h> - -#include <plat/iommu.h> - -#include "iopgtable.h" - -#define for_each_iotlb_cr(obj, n, __i, cr) \ - for (__i = 0; \ - (__i < (n)) && (cr = __iotlb_read_cr((obj), __i), true); \ - __i++) - -/* accommodate the difference between omap1 and omap2/3 */ -static const struct iommu_functions *arch_iommu; - -static struct platform_driver omap_iommu_driver; -static struct kmem_cache *iopte_cachep; - -/** - * 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) -{ - if (arch_iommu) - return -EBUSY; - - arch_iommu = ops; - return 0; -} -EXPORT_SYMBOL_GPL(install_iommu_arch); - -/** - * 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) -{ - if (arch_iommu != ops) - pr_err("%s: not your arch\n", __func__); - - arch_iommu = NULL; -} -EXPORT_SYMBOL_GPL(uninstall_iommu_arch); - -/** - * iommu_save_ctx - Save registers for pm off-mode support - * @obj: target iommu - **/ -void iommu_save_ctx(struct iommu *obj) -{ - arch_iommu->save_ctx(obj); -} -EXPORT_SYMBOL_GPL(iommu_save_ctx); - -/** - * iommu_restore_ctx - Restore registers for pm off-mode support - * @obj: target iommu - **/ -void iommu_restore_ctx(struct iommu *obj) -{ - arch_iommu->restore_ctx(obj); -} -EXPORT_SYMBOL_GPL(iommu_restore_ctx); - -/** - * iommu_arch_version - Return running iommu arch version - **/ -u32 iommu_arch_version(void) -{ - return arch_iommu->version; -} -EXPORT_SYMBOL_GPL(iommu_arch_version); - -static int iommu_enable(struct iommu *obj) -{ - int err; - - if (!obj) - return -EINVAL; - - if (!arch_iommu) - return -ENODEV; - - clk_enable(obj->clk); - - err = arch_iommu->enable(obj); - - clk_disable(obj->clk); - return err; -} - -static void iommu_disable(struct iommu *obj) -{ - if (!obj) - return; - - clk_enable(obj->clk); - - arch_iommu->disable(obj); - - clk_disable(obj->clk); -} - -/* - * TLB operations - */ -void 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); - -static inline int iotlb_cr_valid(struct cr_regs *cr) -{ - if (!cr) - return -EINVAL; - - return arch_iommu->cr_valid(cr); -} - -static inline struct cr_regs *iotlb_alloc_cr(struct iommu *obj, - struct iotlb_entry *e) -{ - if (!e) - return NULL; - - return arch_iommu->alloc_cr(obj, e); -} - -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) -{ - return arch_iommu->fault_isr(obj, da); -} - -static void iotlb_lock_get(struct iommu *obj, struct iotlb_lock *l) -{ - u32 val; - - val = iommu_read_reg(obj, MMU_LOCK); - - l->base = MMU_LOCK_BASE(val); - l->vict = MMU_LOCK_VICT(val); - -} - -static void iotlb_lock_set(struct iommu *obj, struct iotlb_lock *l) -{ - u32 val; - - val = (l->base << MMU_LOCK_BASE_SHIFT); - val |= (l->vict << MMU_LOCK_VICT_SHIFT); - - iommu_write_reg(obj, val, MMU_LOCK); -} - -static void iotlb_read_cr(struct 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) -{ - arch_iommu->tlb_load_cr(obj, cr); - - iommu_write_reg(obj, 1, MMU_FLUSH_ENTRY); - iommu_write_reg(obj, 1, MMU_LD_TLB); -} - -/** - * iotlb_dump_cr - Dump an iommu tlb entry into buf - * @obj: target iommu - * @cr: contents of cam and ram register - * @buf: output buffer - **/ -static inline ssize_t iotlb_dump_cr(struct iommu *obj, struct cr_regs *cr, - char *buf) -{ - BUG_ON(!cr || !buf); - - return arch_iommu->dump_cr(obj, cr, buf); -} - -/* only used in iotlb iteration for-loop */ -static struct cr_regs __iotlb_read_cr(struct iommu *obj, int n) -{ - struct cr_regs cr; - struct iotlb_lock l; - - iotlb_lock_get(obj, &l); - l.vict = n; - iotlb_lock_set(obj, &l); - iotlb_read_cr(obj, &cr); - - return cr; -} - -/** - * load_iotlb_entry - Set an iommu tlb entry - * @obj: target iommu - * @e: an iommu tlb entry info - **/ -int load_iotlb_entry(struct iommu *obj, struct iotlb_entry *e) -{ - int err = 0; - struct iotlb_lock l; - struct cr_regs *cr; - - if (!obj || !obj->nr_tlb_entries || !e) - return -EINVAL; - - clk_enable(obj->clk); - - iotlb_lock_get(obj, &l); - if (l.base == obj->nr_tlb_entries) { - dev_warn(obj->dev, "%s: preserve entries full\n", __func__); - err = -EBUSY; - goto out; - } - if (!e->prsvd) { - int i; - struct cr_regs tmp; - - for_each_iotlb_cr(obj, obj->nr_tlb_entries, i, tmp) - if (!iotlb_cr_valid(&tmp)) - break; - - if (i == obj->nr_tlb_entries) { - dev_dbg(obj->dev, "%s: full: no entry\n", __func__); - err = -EBUSY; - goto out; - } - - iotlb_lock_get(obj, &l); - } else { - l.vict = l.base; - iotlb_lock_set(obj, &l); - } - - cr = iotlb_alloc_cr(obj, e); - if (IS_ERR(cr)) { - clk_disable(obj->clk); - return PTR_ERR(cr); - } - - iotlb_load_cr(obj, cr); - kfree(cr); - - if (e->prsvd) - l.base++; - /* increment victim for next tlb load */ - if (++l.vict == obj->nr_tlb_entries) - l.vict = l.base; - iotlb_lock_set(obj, &l); -out: - clk_disable(obj->clk); - return err; -} -EXPORT_SYMBOL_GPL(load_iotlb_entry); - -/** - * flush_iotlb_page - Clear an iommu tlb entry - * @obj: target iommu - * @da: iommu device virtual address - * - * Clear an iommu tlb entry which includes 'da' address. - **/ -void flush_iotlb_page(struct iommu *obj, u32 da) -{ - int i; - struct cr_regs cr; - - clk_enable(obj->clk); - - for_each_iotlb_cr(obj, obj->nr_tlb_entries, i, cr) { - u32 start; - size_t bytes; - - if (!iotlb_cr_valid(&cr)) - continue; - - start = iotlb_cr_to_virt(&cr); - bytes = iopgsz_to_bytes(cr.cam & 3); - - if ((start <= da) && (da < start + bytes)) { - dev_dbg(obj->dev, "%s: %08x<=%08x(%x)\n", - __func__, start, da, bytes); - iotlb_load_cr(obj, &cr); - iommu_write_reg(obj, 1, MMU_FLUSH_ENTRY); - } - } - clk_disable(obj->clk); - - 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) -{ - struct iotlb_lock l; - - clk_enable(obj->clk); - - l.base = 0; - l.vict = 0; - iotlb_lock_set(obj, &l); - - iommu_write_reg(obj, 1, MMU_GFLUSH); - - 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) -{ - if (!obj || !buf) - return -EINVAL; - - clk_enable(obj->clk); - - bytes = arch_iommu->dump_ctx(obj, buf, bytes); - - clk_disable(obj->clk); - - return bytes; -} -EXPORT_SYMBOL_GPL(iommu_dump_ctx); - -static int __dump_tlb_entries(struct iommu *obj, struct cr_regs *crs, int num) -{ - int i; - struct iotlb_lock saved; - struct cr_regs tmp; - struct cr_regs *p = crs; - - clk_enable(obj->clk); - iotlb_lock_get(obj, &saved); - - for_each_iotlb_cr(obj, num, i, tmp) { - if (!iotlb_cr_valid(&tmp)) - continue; - *p++ = tmp; - } - - iotlb_lock_set(obj, &saved); - clk_disable(obj->clk); - - return p - crs; -} - -/** - * 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) -{ - int i, num; - struct cr_regs *cr; - char *p = buf; - - num = bytes / sizeof(*cr); - num = min(obj->nr_tlb_entries, num); - - cr = kcalloc(num, sizeof(*cr), GFP_KERNEL); - if (!cr) - return 0; - - num = __dump_tlb_entries(obj, cr, num); - for (i = 0; i < num; i++) - p += iotlb_dump_cr(obj, cr + i, p); - kfree(cr); - - return p - buf; -} -EXPORT_SYMBOL_GPL(dump_tlb_entries); - -int 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); - -#endif /* CONFIG_OMAP_IOMMU_DEBUG_MODULE */ - -/* - * H/W pagetable operations - */ -static void flush_iopgd_range(u32 *first, u32 *last) -{ - /* FIXME: L2 cache should be taken care of if it exists */ - do { - asm("mcr p15, 0, %0, c7, c10, 1 @ flush_pgd" - : : "r" (first)); - first += L1_CACHE_BYTES / sizeof(*first); - } while (first <= last); -} - -static void flush_iopte_range(u32 *first, u32 *last) -{ - /* FIXME: L2 cache should be taken care of if it exists */ - do { - asm("mcr p15, 0, %0, c7, c10, 1 @ flush_pte" - : : "r" (first)); - first += L1_CACHE_BYTES / sizeof(*first); - } while (first <= last); -} - -static void iopte_free(u32 *iopte) -{ - /* Note: freed iopte's must be clean ready for re-use */ - kmem_cache_free(iopte_cachep, iopte); -} - -static u32 *iopte_alloc(struct iommu *obj, u32 *iopgd, u32 da) -{ - u32 *iopte; - - /* a table has already existed */ - if (*iopgd) - goto pte_ready; - - /* - * do the allocation outside the page table lock - */ - spin_unlock(&obj->page_table_lock); - iopte = kmem_cache_zalloc(iopte_cachep, GFP_KERNEL); - spin_lock(&obj->page_table_lock); - - if (!*iopgd) { - if (!iopte) - return ERR_PTR(-ENOMEM); - - *iopgd = virt_to_phys(iopte) | IOPGD_TABLE; - flush_iopgd_range(iopgd, iopgd); - - dev_vdbg(obj->dev, "%s: a new pte:%p\n", __func__, iopte); - } else { - /* We raced, free the reduniovant table */ - iopte_free(iopte); - } - -pte_ready: - iopte = iopte_offset(iopgd, da); - - dev_vdbg(obj->dev, - "%s: da:%08x pgd:%p *pgd:%08x pte:%p *pte:%08x\n", - __func__, da, iopgd, *iopgd, iopte, *iopte); - - return iopte; -} - -static int iopgd_alloc_section(struct iommu *obj, u32 da, u32 pa, u32 prot) -{ - u32 *iopgd = iopgd_offset(obj, da); - - if ((da | pa) & ~IOSECTION_MASK) { - dev_err(obj->dev, "%s: %08x:%08x should aligned on %08lx\n", - __func__, da, pa, IOSECTION_SIZE); - return -EINVAL; - } - - *iopgd = (pa & IOSECTION_MASK) | prot | IOPGD_SECTION; - flush_iopgd_range(iopgd, iopgd); - return 0; -} - -static int iopgd_alloc_super(struct iommu *obj, u32 da, u32 pa, u32 prot) -{ - u32 *iopgd = iopgd_offset(obj, da); - int i; - - if ((da | pa) & ~IOSUPER_MASK) { - dev_err(obj->dev, "%s: %08x:%08x should aligned on %08lx\n", - __func__, da, pa, IOSUPER_SIZE); - return -EINVAL; - } - - for (i = 0; i < 16; i++) - *(iopgd + i) = (pa & IOSUPER_MASK) | prot | IOPGD_SUPER; - flush_iopgd_range(iopgd, iopgd + 15); - return 0; -} - -static int iopte_alloc_page(struct iommu *obj, u32 da, u32 pa, u32 prot) -{ - u32 *iopgd = iopgd_offset(obj, da); - u32 *iopte = iopte_alloc(obj, iopgd, da); - - if (IS_ERR(iopte)) - return PTR_ERR(iopte); - - *iopte = (pa & IOPAGE_MASK) | prot | IOPTE_SMALL; - flush_iopte_range(iopte, iopte); - - dev_vdbg(obj->dev, "%s: da:%08x pa:%08x pte:%p *pte:%08x\n", - __func__, da, pa, iopte, *iopte); - - return 0; -} - -static int iopte_alloc_large(struct iommu *obj, u32 da, u32 pa, u32 prot) -{ - u32 *iopgd = iopgd_offset(obj, da); - u32 *iopte = iopte_alloc(obj, iopgd, da); - int i; - - if ((da | pa) & ~IOLARGE_MASK) { - dev_err(obj->dev, "%s: %08x:%08x should aligned on %08lx\n", - __func__, da, pa, IOLARGE_SIZE); - return -EINVAL; - } - - if (IS_ERR(iopte)) - return PTR_ERR(iopte); - - for (i = 0; i < 16; i++) - *(iopte + i) = (pa & IOLARGE_MASK) | prot | IOPTE_LARGE; - flush_iopte_range(iopte, iopte + 15); - return 0; -} - -static int iopgtable_store_entry_core(struct iommu *obj, struct iotlb_entry *e) -{ - int (*fn)(struct iommu *, u32, u32, u32); - u32 prot; - int err; - - if (!obj || !e) - return -EINVAL; - - switch (e->pgsz) { - case MMU_CAM_PGSZ_16M: - fn = iopgd_alloc_super; - break; - case MMU_CAM_PGSZ_1M: - fn = iopgd_alloc_section; - break; - case MMU_CAM_PGSZ_64K: - fn = iopte_alloc_large; - break; - case MMU_CAM_PGSZ_4K: - fn = iopte_alloc_page; - break; - default: - fn = NULL; - BUG(); - break; - } - - prot = get_iopte_attr(e); - - spin_lock(&obj->page_table_lock); - err = fn(obj, e->da, e->pa, prot); - spin_unlock(&obj->page_table_lock); - - return err; -} - -/** - * 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 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 - return err; -} -EXPORT_SYMBOL_GPL(iopgtable_store_entry); - -/** - * iopgtable_lookup_entry - Lookup an iommu pte entry - * @obj: target iommu - * @da: iommu device virtual address - * @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) -{ - u32 *iopgd, *iopte = NULL; - - iopgd = iopgd_offset(obj, da); - if (!*iopgd) - goto out; - - if (iopgd_is_table(*iopgd)) - iopte = iopte_offset(iopgd, da); -out: - *ppgd = iopgd; - *ppte = iopte; -} -EXPORT_SYMBOL_GPL(iopgtable_lookup_entry); - -static size_t iopgtable_clear_entry_core(struct iommu *obj, u32 da) -{ - size_t bytes; - u32 *iopgd = iopgd_offset(obj, da); - int nent = 1; - - if (!*iopgd) - return 0; - - if (iopgd_is_table(*iopgd)) { - int i; - u32 *iopte = iopte_offset(iopgd, da); - - bytes = IOPTE_SIZE; - if (*iopte & IOPTE_LARGE) { - nent *= 16; - /* rewind to the 1st entry */ - iopte = iopte_offset(iopgd, (da & IOLARGE_MASK)); - } - bytes *= nent; - memset(iopte, 0, nent * sizeof(*iopte)); - flush_iopte_range(iopte, iopte + (nent - 1) * sizeof(*iopte)); - - /* - * do table walk to check if this table is necessary or not - */ - iopte = iopte_offset(iopgd, 0); - for (i = 0; i < PTRS_PER_IOPTE; i++) - if (iopte[i]) - goto out; - - iopte_free(iopte); - nent = 1; /* for the next L1 entry */ - } else { - bytes = IOPGD_SIZE; - if ((*iopgd & IOPGD_SUPER) == IOPGD_SUPER) { - nent *= 16; - /* rewind to the 1st entry */ - iopgd = iopgd_offset(obj, (da & IOSUPER_MASK)); - } - bytes *= nent; - } - memset(iopgd, 0, nent * sizeof(*iopgd)); - flush_iopgd_range(iopgd, iopgd + (nent - 1) * sizeof(*iopgd)); -out: - return bytes; -} - -/** - * iopgtable_clear_entry - Remove an iommu pte entry - * @obj: target iommu - * @da: iommu device virtual address - **/ -size_t iopgtable_clear_entry(struct iommu *obj, u32 da) -{ - size_t bytes; - - spin_lock(&obj->page_table_lock); - - bytes = iopgtable_clear_entry_core(obj, da); - flush_iotlb_page(obj, da); - - spin_unlock(&obj->page_table_lock); - - return bytes; -} -EXPORT_SYMBOL_GPL(iopgtable_clear_entry); - -static void iopgtable_clear_entry_all(struct iommu *obj) -{ - int i; - - spin_lock(&obj->page_table_lock); - - for (i = 0; i < PTRS_PER_IOPGD; i++) { - u32 da; - u32 *iopgd; - - da = i << IOPGD_SHIFT; - iopgd = iopgd_offset(obj, da); - - if (!*iopgd) - continue; - - if (iopgd_is_table(*iopgd)) - iopte_free(iopte_offset(iopgd, 0)); - - *iopgd = 0; - flush_iopgd_range(iopgd, iopgd); - } - - flush_iotlb_all(obj); - - spin_unlock(&obj->page_table_lock); -} - -/* - * Device IOMMU generic operations - */ -static irqreturn_t iommu_fault_handler(int irq, void *data) -{ - u32 da, errs; - u32 *iopgd, *iopte; - struct iommu *obj = data; - - if (!obj->refcount) - return IRQ_NONE; - - clk_enable(obj->clk); - errs = iommu_report_fault(obj, &da); - clk_disable(obj->clk); - if (errs == 0) - return IRQ_HANDLED; - - /* Fault callback or TLB/PTE Dynamic loading */ - if (obj->isr && !obj->isr(obj, da, errs, obj->isr_priv)) - return IRQ_HANDLED; - - iommu_disable(obj); - - iopgd = iopgd_offset(obj, da); - - if (!iopgd_is_table(*iopgd)) { - dev_err(obj->dev, "%s: errs:0x%08x da:0x%08x pgd:0x%p " - "*pgd:px%08x\n", obj->name, errs, da, iopgd, *iopgd); - return IRQ_NONE; - } - - iopte = iopte_offset(iopgd, da); - - dev_err(obj->dev, "%s: errs:0x%08x da:0x%08x pgd:0x%p *pgd:0x%08x " - "pte:0x%p *pte:0x%08x\n", obj->name, errs, da, iopgd, *iopgd, - iopte, *iopte); - - return IRQ_NONE; -} - -static int device_match_by_alias(struct device *dev, void *data) -{ - struct iommu *obj = to_iommu(dev); - const char *name = data; - - pr_debug("%s: %s %s\n", __func__, obj->name, name); - - return strcmp(obj->name, name) == 0; -} - -/** - * 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) -{ - - if (!obj) - return -EFAULT; - - if (end < start || !PAGE_ALIGN(start | end)) - return -EINVAL; - - obj->da_start = start; - obj->da_end = end; - - return 0; -} -EXPORT_SYMBOL_GPL(iommu_set_da_range); - -/** - * iommu_get - Get iommu handler - * @name: target iommu name - **/ -struct iommu *iommu_get(const char *name) -{ - 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); - - mutex_lock(&obj->iommu_lock); - - if (obj->refcount++ == 0) { - 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); - - dev_dbg(obj->dev, "%s: %s\n", __func__, obj->name); - return obj; - -err_module: - if (obj->refcount == 1) - iommu_disable(obj); -err_enable: - obj->refcount--; - mutex_unlock(&obj->iommu_lock); - return ERR_PTR(err); -} -EXPORT_SYMBOL_GPL(iommu_get); - -/** - * iommu_put - Put back iommu handler - * @obj: target iommu - **/ -void iommu_put(struct iommu *obj) -{ - if (!obj || IS_ERR(obj)) - return; - - mutex_lock(&obj->iommu_lock); - - if (--obj->refcount == 0) - iommu_disable(obj); - - module_put(obj->owner); - - mutex_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 - */ -static int __devinit omap_iommu_probe(struct platform_device *pdev) -{ - int err = -ENODEV; - void *p; - int irq; - struct iommu *obj; - struct resource *res; - struct iommu_platform_data *pdata = pdev->dev.platform_data; - - if (pdev->num_resources != 2) - return -EINVAL; - - obj = kzalloc(sizeof(*obj) + MMU_REG_SIZE, GFP_KERNEL); - if (!obj) - return -ENOMEM; - - obj->clk = clk_get(&pdev->dev, pdata->clk_name); - if (IS_ERR(obj->clk)) - goto err_clk; - - obj->nr_tlb_entries = pdata->nr_tlb_entries; - obj->name = pdata->name; - obj->dev = &pdev->dev; - obj->ctx = (void *)obj + sizeof(*obj); - obj->da_start = pdata->da_start; - obj->da_end = pdata->da_end; - - mutex_init(&obj->iommu_lock); - mutex_init(&obj->mmap_lock); - spin_lock_init(&obj->page_table_lock); - INIT_LIST_HEAD(&obj->mmap); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - err = -ENODEV; - goto err_mem; - } - - res = request_mem_region(res->start, resource_size(res), - dev_name(&pdev->dev)); - if (!res) { - err = -EIO; - goto err_mem; - } - - obj->regbase = ioremap(res->start, resource_size(res)); - if (!obj->regbase) { - err = -ENOMEM; - goto err_ioremap; - } - - irq = platform_get_irq(pdev, 0); - if (irq < 0) { - err = -ENODEV; - goto err_irq; - } - err = request_irq(irq, iommu_fault_handler, IRQF_SHARED, - dev_name(&pdev->dev), obj); - if (err < 0) - 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: - release_mem_region(res->start, resource_size(res)); -err_mem: - clk_put(obj->clk); -err_clk: - kfree(obj); - return err; -} - -static int __devexit omap_iommu_remove(struct platform_device *pdev) -{ - int irq; - struct resource *res; - struct 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); - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - release_mem_region(res->start, resource_size(res)); - iounmap(obj->regbase); - - clk_put(obj->clk); - dev_info(&pdev->dev, "%s removed\n", obj->name); - kfree(obj); - return 0; -} - -static struct platform_driver omap_iommu_driver = { - .probe = omap_iommu_probe, - .remove = __devexit_p(omap_iommu_remove), - .driver = { - .name = "omap-iommu", - }, -}; - -static void iopte_cachep_ctor(void *iopte) -{ - clean_dcache_area(iopte, IOPTE_TABLE_SIZE); -} - -static int __init omap_iommu_init(void) -{ - struct kmem_cache *p; - const unsigned long flags = SLAB_HWCACHE_ALIGN; - size_t align = 1 << 10; /* L2 pagetable alignement */ - - p = kmem_cache_create("iopte_cache", IOPTE_TABLE_SIZE, align, flags, - iopte_cachep_ctor); - if (!p) - return -ENOMEM; - iopte_cachep = p; - - return platform_driver_register(&omap_iommu_driver); -} -module_init(omap_iommu_init); - -static void __exit omap_iommu_exit(void) -{ - kmem_cache_destroy(iopte_cachep); - - platform_driver_unregister(&omap_iommu_driver); -} -module_exit(omap_iommu_exit); - -MODULE_DESCRIPTION("omap iommu: tlb and pagetable primitives"); -MODULE_ALIAS("platform:omap-iommu"); -MODULE_AUTHOR("Hiroshi DOYU, Paul Mundt and Toshihiro Kobayashi"); -MODULE_LICENSE("GPL v2"); diff --git a/arch/arm/plat-omap/iovmm.c b/arch/arm/plat-omap/iovmm.c deleted file mode 100644 index 79e7fedb8602..000000000000 --- a/arch/arm/plat-omap/iovmm.c +++ /dev/null @@ -1,904 +0,0 @@ -/* - * omap iommu: simple virtual address space management - * - * 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. - */ - -#include <linux/err.h> -#include <linux/slab.h> -#include <linux/vmalloc.h> -#include <linux/device.h> -#include <linux/scatterlist.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. - */ - -static struct kmem_cache *iovm_area_cachep; - -/* return total bytes of sg buffers */ -static size_t sgtable_len(const struct sg_table *sgt) -{ - unsigned int i, total = 0; - struct scatterlist *sg; - - if (!sgt) - return 0; - - for_each_sg(sgt->sgl, sg, sgt->nents, i) { - size_t bytes; - - bytes = sg->length; - - if (!iopgsz_ok(bytes)) { - pr_err("%s: sg[%d] not iommu pagesize(%x)\n", - __func__, i, bytes); - return 0; - } - - total += bytes; - } - - return total; -} -#define sgtable_ok(x) (!!sgtable_len(x)) - -static unsigned max_alignment(u32 addr) -{ - int i; - unsigned pagesize[] = { SZ_16M, SZ_1M, SZ_64K, SZ_4K, }; - for (i = 0; i < ARRAY_SIZE(pagesize) && addr & (pagesize[i] - 1); i++) - ; - return (i < ARRAY_SIZE(pagesize)) ? pagesize[i] : 0; -} - -/* - * calculate the optimal number sg elements from total bytes based on - * iommu superpages - */ -static unsigned sgtable_nents(size_t bytes, u32 da, u32 pa) -{ - unsigned nr_entries = 0, ent_sz; - - if (!IS_ALIGNED(bytes, PAGE_SIZE)) { - pr_err("%s: wrong size %08x\n", __func__, bytes); - return 0; - } - - while (bytes) { - ent_sz = max_alignment(da | pa); - ent_sz = min_t(unsigned, ent_sz, iopgsz_max(bytes)); - nr_entries++; - da += ent_sz; - pa += ent_sz; - bytes -= ent_sz; - } - - return nr_entries; -} - -/* allocate and initialize sg_table header(a kind of 'superblock') */ -static struct sg_table *sgtable_alloc(const size_t bytes, u32 flags, - u32 da, u32 pa) -{ - unsigned int nr_entries; - int err; - struct sg_table *sgt; - - if (!bytes) - return ERR_PTR(-EINVAL); - - if (!IS_ALIGNED(bytes, PAGE_SIZE)) - return ERR_PTR(-EINVAL); - - if (flags & IOVMF_LINEAR) { - nr_entries = sgtable_nents(bytes, da, pa); - if (!nr_entries) - return ERR_PTR(-EINVAL); - } else - nr_entries = bytes / PAGE_SIZE; - - sgt = kzalloc(sizeof(*sgt), GFP_KERNEL); - if (!sgt) - return ERR_PTR(-ENOMEM); - - err = sg_alloc_table(sgt, nr_entries, GFP_KERNEL); - if (err) { - kfree(sgt); - return ERR_PTR(err); - } - - pr_debug("%s: sgt:%p(%d entries)\n", __func__, sgt, nr_entries); - - return sgt; -} - -/* free sg_table header(a kind of superblock) */ -static void sgtable_free(struct sg_table *sgt) -{ - if (!sgt) - return; - - sg_free_table(sgt); - kfree(sgt); - - pr_debug("%s: sgt:%p\n", __func__, sgt); -} - -/* map 'sglist' to a contiguous mpu virtual area and return 'va' */ -static void *vmap_sg(const struct sg_table *sgt) -{ - u32 va; - size_t total; - unsigned int i; - struct scatterlist *sg; - struct vm_struct *new; - const struct mem_type *mtype; - - mtype = get_mem_type(MT_DEVICE); - if (!mtype) - return ERR_PTR(-EINVAL); - - total = sgtable_len(sgt); - if (!total) - return ERR_PTR(-EINVAL); - - new = __get_vm_area(total, VM_IOREMAP, VMALLOC_START, VMALLOC_END); - if (!new) - return ERR_PTR(-ENOMEM); - va = (u32)new->addr; - - for_each_sg(sgt->sgl, sg, sgt->nents, i) { - size_t bytes; - u32 pa; - int err; - - pa = sg_phys(sg); - bytes = sg->length; - - BUG_ON(bytes != PAGE_SIZE); - - err = ioremap_page(va, pa, mtype); - if (err) - goto err_out; - - va += bytes; - } - - flush_cache_vmap((unsigned long)new->addr, - (unsigned long)(new->addr + total)); - return new->addr; - -err_out: - WARN_ON(1); /* FIXME: cleanup some mpu mappings */ - vunmap(new->addr); - return ERR_PTR(-EAGAIN); -} - -static inline void vunmap_sg(const void *va) -{ - vunmap(va); -} - -static struct iovm_struct *__find_iovm_area(struct iommu *obj, const u32 da) -{ - struct iovm_struct *tmp; - - list_for_each_entry(tmp, &obj->mmap, list) { - if ((da >= tmp->da_start) && (da < tmp->da_end)) { - size_t len; - - len = tmp->da_end - tmp->da_start; - - dev_dbg(obj->dev, "%s: %08x-%08x-%08x(%x) %08x\n", - __func__, tmp->da_start, da, tmp->da_end, len, - tmp->flags); - - return tmp; - } - } - - return NULL; -} - -/** - * 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 *area; - - mutex_lock(&obj->mmap_lock); - area = __find_iovm_area(obj, da); - mutex_unlock(&obj->mmap_lock); - - return area; -} -EXPORT_SYMBOL_GPL(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, - size_t bytes, u32 flags) -{ - struct iovm_struct *new, *tmp; - u32 start, prev_end, alignment; - - if (!obj || !bytes) - return ERR_PTR(-EINVAL); - - start = da; - alignment = PAGE_SIZE; - - if (~flags & IOVMF_DA_FIXED) { - /* Don't map address 0 */ - start = obj->da_start ? obj->da_start : alignment; - - if (flags & IOVMF_LINEAR) - alignment = iopgsz_max(bytes); - start = roundup(start, alignment); - } else if (start < obj->da_start || start > obj->da_end || - obj->da_end - start < bytes) { - return ERR_PTR(-EINVAL); - } - - tmp = NULL; - if (list_empty(&obj->mmap)) - goto found; - - prev_end = 0; - list_for_each_entry(tmp, &obj->mmap, list) { - - if (prev_end > start) - break; - - if (tmp->da_start > start && (tmp->da_start - start) >= bytes) - goto found; - - if (tmp->da_end >= start && ~flags & IOVMF_DA_FIXED) - start = roundup(tmp->da_end + 1, alignment); - - prev_end = tmp->da_end; - } - - if ((start >= prev_end) && (obj->da_end - start >= bytes)) - goto found; - - dev_dbg(obj->dev, "%s: no space to fit %08x(%x) flags: %08x\n", - __func__, da, bytes, flags); - - return ERR_PTR(-EINVAL); - -found: - new = kmem_cache_zalloc(iovm_area_cachep, GFP_KERNEL); - if (!new) - return ERR_PTR(-ENOMEM); - - new->iommu = obj; - new->da_start = start; - new->da_end = start + bytes; - new->flags = flags; - - /* - * keep ascending order of iovmas - */ - if (tmp) - list_add_tail(&new->list, &tmp->list); - else - list_add(&new->list, &obj->mmap); - - dev_dbg(obj->dev, "%s: found %08x-%08x-%08x(%x) %08x\n", - __func__, new->da_start, start, new->da_end, bytes, flags); - - return new; -} - -static void free_iovm_area(struct iommu *obj, struct iovm_struct *area) -{ - size_t bytes; - - BUG_ON(!obj || !area); - - bytes = area->da_end - area->da_start; - - dev_dbg(obj->dev, "%s: %08x-%08x(%x) %08x\n", - __func__, area->da_start, area->da_end, bytes, area->flags); - - list_del(&area->list); - kmem_cache_free(iovm_area_cachep, area); -} - -/** - * 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 *va = NULL; - struct iovm_struct *area; - - mutex_lock(&obj->mmap_lock); - - area = __find_iovm_area(obj, da); - if (!area) { - dev_dbg(obj->dev, "%s: no da area(%08x)\n", __func__, da); - goto out; - } - va = area->va; -out: - mutex_unlock(&obj->mmap_lock); - - return va; -} -EXPORT_SYMBOL_GPL(da_to_va); - -static void sgtable_fill_vmalloc(struct sg_table *sgt, void *_va) -{ - unsigned int i; - struct scatterlist *sg; - void *va = _va; - void *va_end; - - for_each_sg(sgt->sgl, sg, sgt->nents, i) { - struct page *pg; - const size_t bytes = PAGE_SIZE; - - /* - * iommu 'superpage' isn't supported with 'iommu_vmalloc()' - */ - pg = vmalloc_to_page(va); - BUG_ON(!pg); - sg_set_page(sg, pg, bytes, 0); - - va += bytes; - } - - va_end = _va + PAGE_SIZE * i; -} - -static inline void sgtable_drain_vmalloc(struct sg_table *sgt) -{ - /* - * Actually this is not necessary at all, just exists for - * consistency of the code readability. - */ - 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) -{ - int err; - unsigned int i, j; - struct scatterlist *sg; - u32 da = new->da_start; - - if (!obj || !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; - - flags &= ~IOVMF_PGSZ_MASK; - pgsz = bytes_to_iopgsz(bytes); - if (pgsz < 0) - goto err_out; - flags |= pgsz; - - 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); - if (err) - goto err_out; - - da += bytes; - } - return 0; - -err_out: - da = new->da_start; - - for_each_sg(sgt->sgl, sg, i, j) { - size_t bytes; - - bytes = iopgtable_clear_entry(obj, da); - - BUG_ON(!iopgsz_ok(bytes)); - - da += bytes; - } - return err; -} - -/* release 'da' <-> 'pa' mapping */ -static void unmap_iovm_area(struct iommu *obj, struct iovm_struct *area) -{ - u32 start; - size_t total = area->da_end - area->da_start; - - BUG_ON((!total) || !IS_ALIGNED(total, PAGE_SIZE)); - - start = area->da_start; - while (total > 0) { - size_t bytes; - - bytes = iopgtable_clear_entry(obj, start); - if (bytes == 0) - bytes = PAGE_SIZE; - else - dev_dbg(obj->dev, "%s: unmap %08x(%x) %08x\n", - __func__, start, bytes, area->flags); - - BUG_ON(!IS_ALIGNED(bytes, PAGE_SIZE)); - - total -= bytes; - start += bytes; - } - BUG_ON(total); -} - -/* template function for all unmapping */ -static struct sg_table *unmap_vm_area(struct iommu *obj, const u32 da, - void (*fn)(const void *), u32 flags) -{ - struct sg_table *sgt = NULL; - struct iovm_struct *area; - - if (!IS_ALIGNED(da, PAGE_SIZE)) { - dev_err(obj->dev, "%s: alignment err(%08x)\n", __func__, da); - return NULL; - } - - mutex_lock(&obj->mmap_lock); - - area = __find_iovm_area(obj, da); - if (!area) { - dev_dbg(obj->dev, "%s: no da area(%08x)\n", __func__, da); - goto out; - } - - if ((area->flags & flags) != flags) { - dev_err(obj->dev, "%s: wrong flags(%08x)\n", __func__, - area->flags); - goto out; - } - sgt = (struct sg_table *)area->sgt; - - unmap_iovm_area(obj, area); - - fn(area->va); - - dev_dbg(obj->dev, "%s: %08x-%08x-%08x(%x) %08x\n", __func__, - area->da_start, da, area->da_end, - area->da_end - area->da_start, area->flags); - - free_iovm_area(obj, area); -out: - mutex_unlock(&obj->mmap_lock); - - return sgt; -} - -static u32 map_iommu_region(struct iommu *obj, u32 da, - const struct sg_table *sgt, void *va, size_t bytes, u32 flags) -{ - int err = -ENOMEM; - struct iovm_struct *new; - - mutex_lock(&obj->mmap_lock); - - new = alloc_iovm_area(obj, da, bytes, flags); - if (IS_ERR(new)) { - err = PTR_ERR(new); - goto err_alloc_iovma; - } - new->va = va; - new->sgt = sgt; - - if (map_iovm_area(obj, new, sgt, new->flags)) - goto err_map; - - mutex_unlock(&obj->mmap_lock); - - dev_dbg(obj->dev, "%s: da:%08x(%x) flags:%08x va:%p\n", - __func__, new->da_start, bytes, new->flags, va); - - return new->da_start; - -err_map: - free_iovm_area(obj, new); -err_alloc_iovma: - 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) -{ - return map_iommu_region(obj, da, sgt, va, bytes, flags); -} - -/** - * 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) -{ - size_t bytes; - void *va = NULL; - - if (!obj || !obj->dev || !sgt) - return -EINVAL; - - bytes = sgtable_len(sgt); - if (!bytes) - return -EINVAL; - bytes = PAGE_ALIGN(bytes); - - if (flags & IOVMF_MMIO) { - va = vmap_sg(sgt); - if (IS_ERR(va)) - return PTR_ERR(va); - } - - flags |= IOVMF_DISCONT; - flags |= IOVMF_MMIO; - - da = __iommu_vmap(obj, da, sgt, va, bytes, flags); - if (IS_ERR_VALUE(da)) - vunmap_sg(va); - - return da; -} -EXPORT_SYMBOL_GPL(iommu_vmap); - -/** - * iommu_vunmap - release virtual mapping obtained by '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()'. - */ -struct sg_table *iommu_vunmap(struct iommu *obj, u32 da) -{ - struct sg_table *sgt; - /* - * 'sgt' is allocated before 'iommu_vmalloc()' is called. - * Just returns 'sgt' to the caller to free - */ - sgt = unmap_vm_area(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); - -/** - * iommu_vmalloc - (d)-(p)-(v) address allocator and mapper - * @obj: objective iommu - * @da: contiguous iommu virtual memory - * @bytes: allocation size - * @flags: iovma and page property - * - * 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) -{ - void *va; - struct sg_table *sgt; - - if (!obj || !obj->dev || !bytes) - return -EINVAL; - - bytes = PAGE_ALIGN(bytes); - - va = vmalloc(bytes); - if (!va) - return -ENOMEM; - - flags |= IOVMF_DISCONT; - flags |= IOVMF_ALLOC; - - sgt = sgtable_alloc(bytes, flags, da, 0); - if (IS_ERR(sgt)) { - da = PTR_ERR(sgt); - goto err_sgt_alloc; - } - sgtable_fill_vmalloc(sgt, va); - - da = __iommu_vmap(obj, da, sgt, va, bytes, flags); - if (IS_ERR_VALUE(da)) - goto err_iommu_vmap; - - return da; - -err_iommu_vmap: - sgtable_drain_vmalloc(sgt); - sgtable_free(sgt); -err_sgt_alloc: - vfree(va); - return da; -} -EXPORT_SYMBOL_GPL(iommu_vmalloc); - -/** - * iommu_vfree - release memory allocated by '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()'. - */ -void iommu_vfree(struct iommu *obj, const u32 da) -{ - struct sg_table *sgt; - - sgt = unmap_vm_area(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); - - -static int __init iovmm_init(void) -{ - const unsigned long flags = SLAB_HWCACHE_ALIGN; - struct kmem_cache *p; - - p = kmem_cache_create("iovm_area_cache", sizeof(struct iovm_struct), 0, - flags, NULL); - if (!p) - return -ENOMEM; - iovm_area_cachep = p; - - return 0; -} -module_init(iovmm_init); - -static void __exit iovmm_exit(void) -{ - kmem_cache_destroy(iovm_area_cachep); -} -module_exit(iovmm_exit); - -MODULE_DESCRIPTION("omap iommu: simple virtual address space management"); -MODULE_AUTHOR("Hiroshi DOYU <Hiroshi.DOYU@nokia.com>"); -MODULE_LICENSE("GPL v2"); |
