disable cpu isolcpus

hc

2023-12-09 958e46acc8e900e8569dd467c1af9b8d2d019394

 kernel/include/linux/dma-direct.h
..
..
@@ -1,69 +1,154 @@
1
1
 /* SPDX-License-Identifier: GPL-2.0 */
2
+/*
3
+ * Internals of the DMA direct mapping implementation.  Only for use by the
4
+ * DMA mapping code and IOMMU drivers.
5
+ */
2
6
 #ifndef _LINUX_DMA_DIRECT_H
3
7
 #define _LINUX_DMA_DIRECT_H 1
4
8
 
5
9
 #include <linux/dma-mapping.h>
10
+#include <linux/dma-map-ops.h>
11
+#include <linux/memblock.h> /* for min_low_pfn */
6
12
 #include <linux/mem_encrypt.h>
13
+#include <linux/swiotlb.h>
14
+
15
+extern unsigned int zone_dma_bits;
16
+
17
+/*
18
+ * Record the mapping of CPU physical to DMA addresses for a given region.
19
+ */
20
+struct bus_dma_region {
21
+	phys_addr_t	cpu_start;
22
+	dma_addr_t	dma_start;
23
+	u64		size;
24
+	u64		offset;
25
+};
26
+
27
+static inline bool zone_dma32_is_empty(int node)
28
+{
29
+#ifdef CONFIG_ZONE_DMA32
30
+	pg_data_t *pgdat = NODE_DATA(node);
31
+
32
+	return zone_is_empty(&pgdat->node_zones[ZONE_DMA32]);
33
+#else
34
+	return true;
35
+#endif
36
+}
37
+
38
+static inline bool zone_dma32_are_empty(void)
39
+{
40
+#ifdef CONFIG_NUMA
41
+	int node;
42
+
43
+	for_each_node(node)
44
+		if (!zone_dma32_is_empty(node))
45
+			return false;
46
+#else
47
+	if (!zone_dma32_is_empty(numa_node_id()))
48
+		return false;
49
+#endif
50
+
51
+	return true;
52
+}
53
+
54
+static inline dma_addr_t translate_phys_to_dma(struct device *dev,
55
+		phys_addr_t paddr)
56
+{
57
+	const struct bus_dma_region *m;
58
+
59
+	for (m = dev->dma_range_map; m->size; m++)
60
+		if (paddr >= m->cpu_start && paddr - m->cpu_start < m->size)
61
+			return (dma_addr_t)paddr - m->offset;
62
+
63
+	/* make sure dma_capable fails when no translation is available */
64
+	return DMA_MAPPING_ERROR;
65
+}
66
+
67
+static inline phys_addr_t translate_dma_to_phys(struct device *dev,
68
+		dma_addr_t dma_addr)
69
+{
70
+	const struct bus_dma_region *m;
71
+
72
+	for (m = dev->dma_range_map; m->size; m++)
73
+		if (dma_addr >= m->dma_start && dma_addr - m->dma_start < m->size)
74
+			return (phys_addr_t)dma_addr + m->offset;
75
+
76
+	return (phys_addr_t)-1;
77
+}
7
78
 
8
79
 #ifdef CONFIG_ARCH_HAS_PHYS_TO_DMA
9
80
 #include <asm/dma-direct.h>
81
+#ifndef phys_to_dma_unencrypted
82
+#define phys_to_dma_unencrypted		phys_to_dma
83
+#endif
10
84
 #else
11
-static inline dma_addr_t __phys_to_dma(struct device *dev, phys_addr_t paddr)
85
+static inline dma_addr_t phys_to_dma_unencrypted(struct device *dev,
86
+		phys_addr_t paddr)
12
87
 {
13
-	dma_addr_t dev_addr = (dma_addr_t)paddr;
14
-
15
-	return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
88
+	if (dev->dma_range_map)
89
+		return translate_phys_to_dma(dev, paddr);
90
+	return paddr;
16
91
 }
17
-
18
-static inline phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dev_addr)
19
-{
20
-	phys_addr_t paddr = (phys_addr_t)dev_addr;
21
-
22
-	return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
23
-}
24
-
25
-static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
26
-{
27
-	if (!dev->dma_mask)
28
-		return false;
29
-
30
-	return addr + size - 1 <= *dev->dma_mask;
31
-}
32
-#endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
33
92
 
34
93
 /*
35
94
  * If memory encryption is supported, phys_to_dma will set the memory encryption
36
- * bit in the DMA address, and dma_to_phys will clear it.  The raw __phys_to_dma
37
- * and __dma_to_phys versions should only be used on non-encrypted memory for
38
- * special occasions like DMA coherent buffers.
95
+ * bit in the DMA address, and dma_to_phys will clear it.
96
+ * phys_to_dma_unencrypted is for use on special unencrypted memory like swiotlb
97
+ * buffers.
39
98
  */
40
99
 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
41
100
 {
42
-	return __sme_set(__phys_to_dma(dev, paddr));
101
+	return __sme_set(phys_to_dma_unencrypted(dev, paddr));
43
102
 }
44
103
 
45
-static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
104
+static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dma_addr)
46
105
 {
47
-	return __sme_clr(__dma_to_phys(dev, daddr));
48
-}
106
+	phys_addr_t paddr;
49
107
 
50
-#ifdef CONFIG_ARCH_HAS_DMA_MARK_CLEAN
51
-void dma_mark_clean(void *addr, size_t size);
108
+	if (dev->dma_range_map)
109
+		paddr = translate_dma_to_phys(dev, dma_addr);
110
+	else
111
+		paddr = dma_addr;
112
+
113
+	return __sme_clr(paddr);
114
+}
115
+#endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
116
+
117
+#ifdef CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED
118
+bool force_dma_unencrypted(struct device *dev);
52
119
 #else
53
-static inline void dma_mark_clean(void *addr, size_t size)
120
+static inline bool force_dma_unencrypted(struct device *dev)
54
121
 {
122
+	return false;
55
123
 }
56
-#endif /* CONFIG_ARCH_HAS_DMA_MARK_CLEAN */
124
+#endif /* CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED */
57
125
 
126
+static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size,
127
+		bool is_ram)
128
+{
129
+	dma_addr_t end = addr + size - 1;
130
+
131
+	if (addr == DMA_MAPPING_ERROR)
132
+		return false;
133
+	if (is_ram && !IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) &&
134
+	    min(addr, end) < phys_to_dma(dev, PFN_PHYS(min_low_pfn)))
135
+		return false;
136
+
137
+	return end <= min_not_zero(*dev->dma_mask, dev->bus_dma_limit);
138
+}
139
+
140
+u64 dma_direct_get_required_mask(struct device *dev);
58
141
 void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
59
142
 		gfp_t gfp, unsigned long attrs);
60
143
 void dma_direct_free(struct device *dev, size_t size, void *cpu_addr,
61
144
 		dma_addr_t dma_addr, unsigned long attrs);
62
-dma_addr_t dma_direct_map_page(struct device *dev, struct page *page,
63
-		unsigned long offset, size_t size, enum dma_data_direction dir,
64
-		unsigned long attrs);
65
-int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
66
-		enum dma_data_direction dir, unsigned long attrs);
145
+struct page *dma_direct_alloc_pages(struct device *dev, size_t size,
146
+		dma_addr_t *dma_handle, enum dma_data_direction dir, gfp_t gfp);
147
+void dma_direct_free_pages(struct device *dev, size_t size,
148
+		struct page *page, dma_addr_t dma_addr,
149
+		enum dma_data_direction dir);
67
150
 int dma_direct_supported(struct device *dev, u64 mask);
68
-int dma_direct_mapping_error(struct device *dev, dma_addr_t dma_addr);
151
+dma_addr_t dma_direct_map_resource(struct device *dev, phys_addr_t paddr,
152
+		size_t size, enum dma_data_direction dir, unsigned long attrs);
153
+
69
154
 #endif /* _LINUX_DMA_DIRECT_H */