mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-19 13:18:21 +07:00
da004c3600
This adds a iommu_table_ops struct and puts pointer to it into the iommu_table struct. This moves tce_build/tce_free/tce_get/tce_flush callbacks from ppc_md to the new struct where they really belong to. This adds the requirement for @it_ops to be initialized before calling iommu_init_table() to make sure that we do not leave any IOMMU table with iommu_table_ops uninitialized. This is not a parameter of iommu_init_table() though as there will be cases when iommu_init_table() will not be called on TCE tables, for example - VFIO. This does s/tce_build/set/, s/tce_free/clear/ and removes "tce_" redundant prefixes. This removes tce_xxx_rm handlers from ppc_md but does not add them to iommu_table_ops as this will be done later if we decide to support TCE hypercalls in real mode. This removes _vm callbacks as only virtual mode is supported by now so this also removes @rm parameter. For pSeries, this always uses tce_buildmulti_pSeriesLP/ tce_buildmulti_pSeriesLP. This changes multi callback to fall back to tce_build_pSeriesLP/tce_free_pSeriesLP if FW_FEATURE_MULTITCE is not present. The reason for this is we still have to support "multitce=off" boot parameter in disable_multitce() and we do not want to walk through all IOMMU tables in the system and replace "multi" callbacks with single ones. For powernv, this defines _ops per PHB type which are P5IOC2/IODA1/IODA2. This makes the callbacks for them public. Later patches will extend callbacks for IODA1/2. No change in behaviour is expected. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
224 lines
7.2 KiB
C
224 lines
7.2 KiB
C
/*
|
|
* Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation
|
|
* Rewrite, cleanup:
|
|
* Copyright (C) 2004 Olof Johansson <olof@lixom.net>, IBM Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef _ASM_IOMMU_H
|
|
#define _ASM_IOMMU_H
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/compiler.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/device.h>
|
|
#include <linux/dma-mapping.h>
|
|
#include <linux/bitops.h>
|
|
#include <asm/machdep.h>
|
|
#include <asm/types.h>
|
|
#include <asm/pci-bridge.h>
|
|
|
|
#define IOMMU_PAGE_SHIFT_4K 12
|
|
#define IOMMU_PAGE_SIZE_4K (ASM_CONST(1) << IOMMU_PAGE_SHIFT_4K)
|
|
#define IOMMU_PAGE_MASK_4K (~((1 << IOMMU_PAGE_SHIFT_4K) - 1))
|
|
#define IOMMU_PAGE_ALIGN_4K(addr) _ALIGN_UP(addr, IOMMU_PAGE_SIZE_4K)
|
|
|
|
#define IOMMU_PAGE_SIZE(tblptr) (ASM_CONST(1) << (tblptr)->it_page_shift)
|
|
#define IOMMU_PAGE_MASK(tblptr) (~((1 << (tblptr)->it_page_shift) - 1))
|
|
#define IOMMU_PAGE_ALIGN(addr, tblptr) _ALIGN_UP(addr, IOMMU_PAGE_SIZE(tblptr))
|
|
|
|
/* Boot time flags */
|
|
extern int iommu_is_off;
|
|
extern int iommu_force_on;
|
|
|
|
struct iommu_table_ops {
|
|
int (*set)(struct iommu_table *tbl,
|
|
long index, long npages,
|
|
unsigned long uaddr,
|
|
enum dma_data_direction direction,
|
|
struct dma_attrs *attrs);
|
|
void (*clear)(struct iommu_table *tbl,
|
|
long index, long npages);
|
|
unsigned long (*get)(struct iommu_table *tbl, long index);
|
|
void (*flush)(struct iommu_table *tbl);
|
|
};
|
|
|
|
/* These are used by VIO */
|
|
extern struct iommu_table_ops iommu_table_lpar_multi_ops;
|
|
extern struct iommu_table_ops iommu_table_pseries_ops;
|
|
|
|
/*
|
|
* IOMAP_MAX_ORDER defines the largest contiguous block
|
|
* of dma space we can get. IOMAP_MAX_ORDER = 13
|
|
* allows up to 2**12 pages (4096 * 4096) = 16 MB
|
|
*/
|
|
#define IOMAP_MAX_ORDER 13
|
|
|
|
#define IOMMU_POOL_HASHBITS 2
|
|
#define IOMMU_NR_POOLS (1 << IOMMU_POOL_HASHBITS)
|
|
|
|
struct iommu_pool {
|
|
unsigned long start;
|
|
unsigned long end;
|
|
unsigned long hint;
|
|
spinlock_t lock;
|
|
} ____cacheline_aligned_in_smp;
|
|
|
|
struct iommu_table {
|
|
unsigned long it_busno; /* Bus number this table belongs to */
|
|
unsigned long it_size; /* Size of iommu table in entries */
|
|
unsigned long it_offset; /* Offset into global table */
|
|
unsigned long it_base; /* mapped address of tce table */
|
|
unsigned long it_index; /* which iommu table this is */
|
|
unsigned long it_type; /* type: PCI or Virtual Bus */
|
|
unsigned long it_blocksize; /* Entries in each block (cacheline) */
|
|
unsigned long poolsize;
|
|
unsigned long nr_pools;
|
|
struct iommu_pool large_pool;
|
|
struct iommu_pool pools[IOMMU_NR_POOLS];
|
|
unsigned long *it_map; /* A simple allocation bitmap for now */
|
|
unsigned long it_page_shift;/* table iommu page size */
|
|
#ifdef CONFIG_IOMMU_API
|
|
struct iommu_group *it_group;
|
|
#endif
|
|
struct iommu_table_ops *it_ops;
|
|
void (*set_bypass)(struct iommu_table *tbl, bool enable);
|
|
#ifdef CONFIG_PPC_POWERNV
|
|
void *data;
|
|
#endif
|
|
};
|
|
|
|
/* Pure 2^n version of get_order */
|
|
static inline __attribute_const__
|
|
int get_iommu_order(unsigned long size, struct iommu_table *tbl)
|
|
{
|
|
return __ilog2((size - 1) >> tbl->it_page_shift) + 1;
|
|
}
|
|
|
|
|
|
struct scatterlist;
|
|
|
|
static inline void set_iommu_table_base(struct device *dev, void *base)
|
|
{
|
|
dev->archdata.dma_data.iommu_table_base = base;
|
|
}
|
|
|
|
static inline void *get_iommu_table_base(struct device *dev)
|
|
{
|
|
return dev->archdata.dma_data.iommu_table_base;
|
|
}
|
|
|
|
/* Frees table for an individual device node */
|
|
extern void iommu_free_table(struct iommu_table *tbl, const char *node_name);
|
|
|
|
/* Initializes an iommu_table based in values set in the passed-in
|
|
* structure
|
|
*/
|
|
extern struct iommu_table *iommu_init_table(struct iommu_table * tbl,
|
|
int nid);
|
|
#ifdef CONFIG_IOMMU_API
|
|
extern void iommu_register_group(struct iommu_table *tbl,
|
|
int pci_domain_number, unsigned long pe_num);
|
|
extern int iommu_add_device(struct device *dev);
|
|
extern void iommu_del_device(struct device *dev);
|
|
extern int __init tce_iommu_bus_notifier_init(void);
|
|
#else
|
|
static inline void iommu_register_group(struct iommu_table *tbl,
|
|
int pci_domain_number,
|
|
unsigned long pe_num)
|
|
{
|
|
}
|
|
|
|
static inline int iommu_add_device(struct device *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static inline void iommu_del_device(struct device *dev)
|
|
{
|
|
}
|
|
|
|
static inline int __init tce_iommu_bus_notifier_init(void)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif /* !CONFIG_IOMMU_API */
|
|
|
|
extern int ppc_iommu_map_sg(struct device *dev, struct iommu_table *tbl,
|
|
struct scatterlist *sglist, int nelems,
|
|
unsigned long mask,
|
|
enum dma_data_direction direction,
|
|
struct dma_attrs *attrs);
|
|
extern void ppc_iommu_unmap_sg(struct iommu_table *tbl,
|
|
struct scatterlist *sglist,
|
|
int nelems,
|
|
enum dma_data_direction direction,
|
|
struct dma_attrs *attrs);
|
|
|
|
extern void *iommu_alloc_coherent(struct device *dev, struct iommu_table *tbl,
|
|
size_t size, dma_addr_t *dma_handle,
|
|
unsigned long mask, gfp_t flag, int node);
|
|
extern void iommu_free_coherent(struct iommu_table *tbl, size_t size,
|
|
void *vaddr, dma_addr_t dma_handle);
|
|
extern dma_addr_t iommu_map_page(struct device *dev, struct iommu_table *tbl,
|
|
struct page *page, unsigned long offset,
|
|
size_t size, unsigned long mask,
|
|
enum dma_data_direction direction,
|
|
struct dma_attrs *attrs);
|
|
extern void iommu_unmap_page(struct iommu_table *tbl, dma_addr_t dma_handle,
|
|
size_t size, enum dma_data_direction direction,
|
|
struct dma_attrs *attrs);
|
|
|
|
extern void iommu_init_early_pSeries(void);
|
|
extern void iommu_init_early_dart(struct pci_controller_ops *controller_ops);
|
|
extern void iommu_init_early_pasemi(void);
|
|
|
|
extern void alloc_dart_table(void);
|
|
#if defined(CONFIG_PPC64) && defined(CONFIG_PM)
|
|
static inline void iommu_save(void)
|
|
{
|
|
if (ppc_md.iommu_save)
|
|
ppc_md.iommu_save();
|
|
}
|
|
|
|
static inline void iommu_restore(void)
|
|
{
|
|
if (ppc_md.iommu_restore)
|
|
ppc_md.iommu_restore();
|
|
}
|
|
#endif
|
|
|
|
/* The API to support IOMMU operations for VFIO */
|
|
extern int iommu_tce_clear_param_check(struct iommu_table *tbl,
|
|
unsigned long ioba, unsigned long tce_value,
|
|
unsigned long npages);
|
|
extern int iommu_tce_put_param_check(struct iommu_table *tbl,
|
|
unsigned long ioba, unsigned long tce);
|
|
extern int iommu_tce_build(struct iommu_table *tbl, unsigned long entry,
|
|
unsigned long hwaddr, enum dma_data_direction direction);
|
|
extern unsigned long iommu_clear_tce(struct iommu_table *tbl,
|
|
unsigned long entry);
|
|
|
|
extern void iommu_flush_tce(struct iommu_table *tbl);
|
|
extern int iommu_take_ownership(struct iommu_table *tbl);
|
|
extern void iommu_release_ownership(struct iommu_table *tbl);
|
|
|
|
extern enum dma_data_direction iommu_tce_direction(unsigned long tce);
|
|
extern unsigned long iommu_direction_to_tce_perm(enum dma_data_direction dir);
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_IOMMU_H */
|