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2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d 
 kernel/arch/powerpc/include/asm/iommu.h
....@@ -1,21 +1,8 @@
1
+/* SPDX-License-Identifier: GPL-2.0-or-later */
12 /*
23  * Copyright (C) 2001 Mike Corrigan & Dave Engebretsen, IBM Corporation
34  * Rewrite, cleanup:
45  * Copyright (C) 2004 Olof Johansson <olof@lixom.net>, IBM Corporation
5
- *
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- * This program is free software; you can redistribute it and/or modify
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- * it under the terms of the GNU General Public License as published by
8
- * the Free Software Foundation; either version 2 of the License, or
9
- * (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, write to the Free Software
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- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
196  */
207 
218 #ifndef _ASM_IOMMU_H
....@@ -25,7 +12,7 @@
2512 #include <linux/compiler.h>
2613 #include <linux/spinlock.h>
2714 #include <linux/device.h>
28
-#include <linux/dma-mapping.h>
15
+#include <linux/dma-map-ops.h>
2916 #include <linux/bitops.h>
3017 #include <asm/machdep.h>
3118 #include <asm/types.h>
....@@ -35,11 +22,11 @@
3522 #define IOMMU_PAGE_SHIFT_4K      12
3623 #define IOMMU_PAGE_SIZE_4K       (ASM_CONST(1) << IOMMU_PAGE_SHIFT_4K)
3724 #define IOMMU_PAGE_MASK_4K       (~((1 << IOMMU_PAGE_SHIFT_4K) - 1))
38
-#define IOMMU_PAGE_ALIGN_4K(addr) _ALIGN_UP(addr, IOMMU_PAGE_SIZE_4K)
25
+#define IOMMU_PAGE_ALIGN_4K(addr) ALIGN(addr, IOMMU_PAGE_SIZE_4K)
3926 
4027 #define IOMMU_PAGE_SIZE(tblptr) (ASM_CONST(1) << (tblptr)->it_page_shift)
4128 #define IOMMU_PAGE_MASK(tblptr) (~((1 << (tblptr)->it_page_shift) - 1))
42
-#define IOMMU_PAGE_ALIGN(addr, tblptr) _ALIGN_UP(addr, IOMMU_PAGE_SIZE(tblptr))
29
+#define IOMMU_PAGE_ALIGN(addr, tblptr) ALIGN(addr, IOMMU_PAGE_SIZE(tblptr))
4330 
4431 /* Boot time flags */
4532 extern int iommu_is_off;
....@@ -61,15 +48,16 @@
6148 	 * returns old TCE and DMA direction mask.
6249 	 * @tce is a physical address.
6350 	 */
64
-	int (*exchange)(struct iommu_table *tbl,
51
+	int (*xchg_no_kill)(struct iommu_table *tbl,
6552 			long index,
6653 			unsigned long *hpa,
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-			enum dma_data_direction *direction);
68
-	/* Real mode */
69
-	int (*exchange_rm)(struct iommu_table *tbl,
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-			long index,
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-			unsigned long *hpa,
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-			enum dma_data_direction *direction);
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+			enum dma_data_direction *direction,
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+			bool realmode);
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+
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+	void (*tce_kill)(struct iommu_table *tbl,
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+			unsigned long index,
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+			unsigned long pages,
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+			bool realmode);
7361 
7462 	__be64 *(*useraddrptr)(struct iommu_table *tbl, long index, bool alloc);
7563 #endif
....@@ -124,9 +112,11 @@
124112 	struct iommu_table_ops *it_ops;
125113 	struct kref    it_kref;
126114 	int it_nid;
115
+	unsigned long it_reserved_start; /* Start of not-DMA-able (MMIO) area */
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+	unsigned long it_reserved_end;
127117 };
128118 
129
-#define IOMMU_TABLE_USERSPACE_ENTRY_RM(tbl, entry) \
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+#define IOMMU_TABLE_USERSPACE_ENTRY_RO(tbl, entry) \
130120 		((tbl)->it_ops->useraddrptr((tbl), (entry), false))
131121 #define IOMMU_TABLE_USERSPACE_ENTRY(tbl, entry) \
132122 		((tbl)->it_ops->useraddrptr((tbl), (entry), true))
....@@ -142,8 +132,6 @@
142132 struct scatterlist;
143133 
144134 #ifdef CONFIG_PPC64
145
-
146
-#define IOMMU_MAPPING_ERROR		(~(dma_addr_t)0x0)
147135 
148136 static inline void set_iommu_table_base(struct device *dev,
149137 					struct iommu_table *base)
....@@ -164,8 +152,9 @@
164152 /* Initializes an iommu_table based in values set in the passed-in
165153  * structure
166154  */
167
-extern struct iommu_table *iommu_init_table(struct iommu_table * tbl,
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-					    int nid);
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+extern struct iommu_table *iommu_init_table(struct iommu_table *tbl,
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+		int nid, unsigned long res_start, unsigned long res_end);
157
+
169158 #define IOMMU_TABLE_GROUP_MAX_TABLES	2
170159 
171160 struct iommu_table_group;
....@@ -215,11 +204,18 @@
215204 
216205 extern void iommu_register_group(struct iommu_table_group *table_group,
217206 				 int pci_domain_number, unsigned long pe_num);
218
-extern int iommu_add_device(struct device *dev);
207
+extern int iommu_add_device(struct iommu_table_group *table_group,
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+		struct device *dev);
219209 extern void iommu_del_device(struct device *dev);
220
-extern int __init tce_iommu_bus_notifier_init(void);
221
-extern long iommu_tce_xchg(struct iommu_table *tbl, unsigned long entry,
222
-		unsigned long *hpa, enum dma_data_direction *direction);
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+extern long iommu_tce_xchg(struct mm_struct *mm, struct iommu_table *tbl,
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+		unsigned long entry, unsigned long *hpa,
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+		enum dma_data_direction *direction);
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+extern long iommu_tce_xchg_no_kill(struct mm_struct *mm,
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+		struct iommu_table *tbl,
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+		unsigned long entry, unsigned long *hpa,
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+		enum dma_data_direction *direction);
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+extern void iommu_tce_kill(struct iommu_table *tbl,
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+		unsigned long entry, unsigned long pages);
223219 #else
224220 static inline void iommu_register_group(struct iommu_table_group *table_group,
225221 					int pci_domain_number,
....@@ -227,7 +223,8 @@
227223 {
228224 }
229225 
230
-static inline int iommu_add_device(struct device *dev)
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+static inline int iommu_add_device(struct iommu_table_group *table_group,
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+		struct device *dev)
231228 {
232229 	return 0;
233230 }
....@@ -235,15 +232,9 @@
235232 static inline void iommu_del_device(struct device *dev)
236233 {
237234 }
238
-
239
-static inline int __init tce_iommu_bus_notifier_init(void)
240
-{
241
-        return 0;
242
-}
243235 #endif /* !CONFIG_IOMMU_API */
244236 
245
-int dma_iommu_mapping_error(struct device *dev, dma_addr_t dma_addr);
246
-
237
+u64 dma_iommu_get_required_mask(struct device *dev);
247238 #else
248239 
249240 static inline void *get_iommu_table_base(struct device *dev)
....@@ -325,5 +316,13 @@
325316 extern enum dma_data_direction iommu_tce_direction(unsigned long tce);
326317 extern unsigned long iommu_direction_to_tce_perm(enum dma_data_direction dir);
327318 
319
+#ifdef CONFIG_PPC_CELL_NATIVE
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+extern bool iommu_fixed_is_weak;
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+#else
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+#define iommu_fixed_is_weak false
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+#endif
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+
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+extern const struct dma_map_ops dma_iommu_ops;
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+
328327 #endif /* __KERNEL__ */
329328 #endif /* _ASM_IOMMU_H */