Contributors: 6
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Will Deacon |
198 |
78.26% |
2 |
20.00% |
| Rob Herring |
20 |
7.91% |
2 |
20.00% |
| Robin Murphy |
14 |
5.53% |
3 |
30.00% |
| Suravee Suthikulpanit |
12 |
4.74% |
1 |
10.00% |
| Sven Peter |
7 |
2.77% |
1 |
10.00% |
| Thomas Gleixner |
2 |
0.79% |
1 |
10.00% |
| Total |
253 |
|
10 |
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Generic page table allocator for IOMMUs.
*
* Copyright (C) 2014 ARM Limited
*
* Author: Will Deacon <will.deacon@arm.com>
*/
#include <linux/bug.h>
#include <linux/io-pgtable.h>
#include <linux/kernel.h>
#include <linux/types.h>
static const struct io_pgtable_init_fns *
io_pgtable_init_table[IO_PGTABLE_NUM_FMTS] = {
#ifdef CONFIG_IOMMU_IO_PGTABLE_LPAE
[ARM_32_LPAE_S1] = &io_pgtable_arm_32_lpae_s1_init_fns,
[ARM_32_LPAE_S2] = &io_pgtable_arm_32_lpae_s2_init_fns,
[ARM_64_LPAE_S1] = &io_pgtable_arm_64_lpae_s1_init_fns,
[ARM_64_LPAE_S2] = &io_pgtable_arm_64_lpae_s2_init_fns,
[ARM_MALI_LPAE] = &io_pgtable_arm_mali_lpae_init_fns,
[APPLE_DART] = &io_pgtable_apple_dart_init_fns,
#endif
#ifdef CONFIG_IOMMU_IO_PGTABLE_ARMV7S
[ARM_V7S] = &io_pgtable_arm_v7s_init_fns,
#endif
#ifdef CONFIG_AMD_IOMMU
[AMD_IOMMU_V1] = &io_pgtable_amd_iommu_v1_init_fns,
#endif
};
struct io_pgtable_ops *alloc_io_pgtable_ops(enum io_pgtable_fmt fmt,
struct io_pgtable_cfg *cfg,
void *cookie)
{
struct io_pgtable *iop;
const struct io_pgtable_init_fns *fns;
if (fmt >= IO_PGTABLE_NUM_FMTS)
return NULL;
fns = io_pgtable_init_table[fmt];
if (!fns)
return NULL;
iop = fns->alloc(cfg, cookie);
if (!iop)
return NULL;
iop->fmt = fmt;
iop->cookie = cookie;
iop->cfg = *cfg;
return &iop->ops;
}
EXPORT_SYMBOL_GPL(alloc_io_pgtable_ops);
/*
* It is the IOMMU driver's responsibility to ensure that the page table
* is no longer accessible to the walker by this point.
*/
void free_io_pgtable_ops(struct io_pgtable_ops *ops)
{
struct io_pgtable *iop;
if (!ops)
return;
iop = io_pgtable_ops_to_pgtable(ops);
io_pgtable_tlb_flush_all(iop);
io_pgtable_init_table[iop->fmt]->free(iop);
}
EXPORT_SYMBOL_GPL(free_io_pgtable_ops);