diff options
Diffstat (limited to 'arch/powerpc/include/asm/iommu.h')
| -rw-r--r-- | arch/powerpc/include/asm/iommu.h | 120 |
1 files changed, 58 insertions, 62 deletions
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h index 20febe0b7f32..eafdd63cd6c4 100644 --- a/arch/powerpc/include/asm/iommu.h +++ b/arch/powerpc/include/asm/iommu.h @@ -1,21 +1,8 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * 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 @@ -25,20 +12,26 @@ #include <linux/compiler.h> #include <linux/spinlock.h> #include <linux/device.h> -#include <linux/dma-mapping.h> +#include <linux/dma-map-ops.h> #include <linux/bitops.h> #include <asm/machdep.h> #include <asm/types.h> #include <asm/pci-bridge.h> +#include <asm/asm-const.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_ALIGN_4K(addr) ALIGN(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)) +#define IOMMU_PAGE_ALIGN(addr, tblptr) ALIGN(addr, IOMMU_PAGE_SIZE(tblptr)) + +#define DIRECT64_PROPNAME "linux,direct64-ddr-window-info" +#define DMA64_PROPNAME "linux,dma64-ddr-window-info" + +#define MIN_DDW_VPMEM_DMA_WINDOW SZ_2G /* Boot time flags */ extern int iommu_is_off; @@ -60,15 +53,16 @@ struct iommu_table_ops { * returns old TCE and DMA direction mask. * @tce is a physical address. */ - int (*exchange)(struct iommu_table *tbl, - long index, - unsigned long *hpa, - enum dma_data_direction *direction); - /* Real mode */ - int (*exchange_rm)(struct iommu_table *tbl, + int (*xchg_no_kill)(struct iommu_table *tbl, long index, unsigned long *hpa, enum dma_data_direction *direction); + + void (*tce_kill)(struct iommu_table *tbl, + unsigned long index, + unsigned long pages); + + __be64 *(*useraddrptr)(struct iommu_table *tbl, long index, bool alloc); #endif void (*clear)(struct iommu_table *tbl, long index, long npages); @@ -117,15 +111,18 @@ struct iommu_table { unsigned long *it_map; /* A simple allocation bitmap for now */ unsigned long it_page_shift;/* table iommu page size */ struct list_head it_group_list;/* List of iommu_table_group_link */ - unsigned long *it_userspace; /* userspace view of the table */ + __be64 *it_userspace; /* userspace view of the table */ struct iommu_table_ops *it_ops; struct kref it_kref; + int it_nid; + unsigned long it_reserved_start; /* Start of not-DMA-able (MMIO) area */ + unsigned long it_reserved_end; }; +#define IOMMU_TABLE_USERSPACE_ENTRY_RO(tbl, entry) \ + ((tbl)->it_ops->useraddrptr((tbl), (entry), false)) #define IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry) \ - ((tbl)->it_userspace ? \ - &((tbl)->it_userspace[(entry) - (tbl)->it_offset]) : \ - NULL) + ((tbl)->it_ops->useraddrptr((tbl), (entry), true)) /* Pure 2^n version of get_order */ static inline __attribute_const__ @@ -139,8 +136,6 @@ struct scatterlist; #ifdef CONFIG_PPC64 -#define IOMMU_MAPPING_ERROR (~(dma_addr_t)0x0) - static inline void set_iommu_table_base(struct device *dev, struct iommu_table *base) { @@ -160,8 +155,13 @@ extern int iommu_tce_table_put(struct iommu_table *tbl); /* 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); +extern struct iommu_table *iommu_init_table(struct iommu_table *tbl, + int nid, unsigned long res_start, unsigned long res_end); +bool iommu_table_in_use(struct iommu_table *tbl); +extern void iommu_table_reserve_pages(struct iommu_table *tbl, + unsigned long res_start, unsigned long res_end); +extern void iommu_table_clear(struct iommu_table *tbl); + #define IOMMU_TABLE_GROUP_MAX_TABLES 2 struct iommu_table_group; @@ -183,9 +183,9 @@ struct iommu_table_group_ops { long (*unset_window)(struct iommu_table_group *table_group, int num); /* Switch ownership from platform code to external user (e.g. VFIO) */ - void (*take_ownership)(struct iommu_table_group *table_group); + long (*take_ownership)(struct iommu_table_group *table_group, struct device *dev); /* Switch ownership from external user (e.g. VFIO) back to core */ - void (*release_ownership)(struct iommu_table_group *table_group); + void (*release_ownership)(struct iommu_table_group *table_group, struct device *dev); }; struct iommu_table_group_link { @@ -211,13 +211,19 @@ struct iommu_table_group { extern void iommu_register_group(struct iommu_table_group *table_group, 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); -extern long iommu_tce_xchg(struct iommu_table *tbl, unsigned long entry, - unsigned long *hpa, enum dma_data_direction *direction); -extern long iommu_tce_xchg_rm(struct iommu_table *tbl, unsigned long entry, - unsigned long *hpa, enum dma_data_direction *direction); +extern int iommu_add_device(struct iommu_table_group *table_group, + struct device *dev); +extern long iommu_tce_xchg(struct mm_struct *mm, struct iommu_table *tbl, + unsigned long entry, unsigned long *hpa, + enum dma_data_direction *direction); +extern long iommu_tce_xchg_no_kill(struct mm_struct *mm, + struct iommu_table *tbl, + unsigned long entry, unsigned long *hpa, + enum dma_data_direction *direction); +extern void iommu_tce_kill(struct iommu_table *tbl, + unsigned long entry, unsigned long pages); +int dev_has_iommu_table(struct device *dev, void *data); + #else static inline void iommu_register_group(struct iommu_table_group *table_group, int pci_domain_number, @@ -225,23 +231,19 @@ static inline void iommu_register_group(struct iommu_table_group *table_group, { } -static inline int iommu_add_device(struct device *dev) +static inline int iommu_add_device(struct iommu_table_group *table_group, + struct device *dev) { return 0; } -static inline void iommu_del_device(struct device *dev) +static inline int dev_has_iommu_table(struct device *dev, void *data) { -} - -static inline int __init tce_iommu_bus_notifier_init(void) -{ - return 0; + return 0; } #endif /* !CONFIG_IOMMU_API */ -int dma_iommu_mapping_error(struct device *dev, dma_addr_t dma_addr); - +u64 dma_iommu_get_required_mask(struct device *dev); #else static inline void *get_iommu_table_base(struct device *dev) @@ -272,26 +274,20 @@ extern void *iommu_alloc_coherent(struct device *dev, struct iommu_table *tbl, 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, +extern dma_addr_t iommu_map_phys(struct device *dev, struct iommu_table *tbl, + phys_addr_t phys, size_t size, + unsigned long mask, enum dma_data_direction direction, unsigned long attrs); -extern void iommu_unmap_page(struct iommu_table *tbl, dma_addr_t dma_handle, +extern void iommu_unmap_phys(struct iommu_table *tbl, dma_addr_t dma_handle, size_t size, enum dma_data_direction direction, unsigned long attrs); -extern void iommu_init_early_pSeries(void); +void __init iommu_init_early_pSeries(void); extern void iommu_init_early_dart(struct pci_controller_ops *controller_ops); extern void iommu_init_early_pasemi(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) @@ -317,11 +313,11 @@ extern int iommu_tce_check_gpa(unsigned long page_shift, iommu_tce_check_gpa((tbl)->it_page_shift, (gpa))) 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); +extern const struct dma_map_ops dma_iommu_ops; + #endif /* __KERNEL__ */ #endif /* _ASM_IOMMU_H */ |