diff options
Diffstat (limited to 'arch/arm/mach-mvebu')
-rw-r--r-- | arch/arm/mach-mvebu/coherency.c | 58 |
1 files changed, 3 insertions, 55 deletions
diff --git a/arch/arm/mach-mvebu/coherency.c b/arch/arm/mach-mvebu/coherency.c index caa21e9b8cd9..440799ba664a 100644 --- a/arch/arm/mach-mvebu/coherency.c +++ b/arch/arm/mach-mvebu/coherency.c | |||
@@ -33,6 +33,7 @@ | |||
33 | #include <asm/smp_plat.h> | 33 | #include <asm/smp_plat.h> |
34 | #include <asm/cacheflush.h> | 34 | #include <asm/cacheflush.h> |
35 | #include <asm/mach/map.h> | 35 | #include <asm/mach/map.h> |
36 | #include <asm/dma-mapping.h> | ||
36 | #include "coherency.h" | 37 | #include "coherency.h" |
37 | #include "mvebu-soc-id.h" | 38 | #include "mvebu-soc-id.h" |
38 | 39 | ||
@@ -76,54 +77,6 @@ int set_cpu_coherent(void) | |||
76 | return ll_enable_coherency(); | 77 | return ll_enable_coherency(); |
77 | } | 78 | } |
78 | 79 | ||
79 | static inline void mvebu_hwcc_sync_io_barrier(void) | ||
80 | { | ||
81 | writel(0x1, coherency_cpu_base + IO_SYNC_BARRIER_CTL_OFFSET); | ||
82 | while (readl(coherency_cpu_base + IO_SYNC_BARRIER_CTL_OFFSET) & 0x1); | ||
83 | } | ||
84 | |||
85 | static dma_addr_t mvebu_hwcc_dma_map_page(struct device *dev, struct page *page, | ||
86 | unsigned long offset, size_t size, | ||
87 | enum dma_data_direction dir, | ||
88 | struct dma_attrs *attrs) | ||
89 | { | ||
90 | if (dir != DMA_TO_DEVICE) | ||
91 | mvebu_hwcc_sync_io_barrier(); | ||
92 | return pfn_to_dma(dev, page_to_pfn(page)) + offset; | ||
93 | } | ||
94 | |||
95 | |||
96 | static void mvebu_hwcc_dma_unmap_page(struct device *dev, dma_addr_t dma_handle, | ||
97 | size_t size, enum dma_data_direction dir, | ||
98 | struct dma_attrs *attrs) | ||
99 | { | ||
100 | if (dir != DMA_TO_DEVICE) | ||
101 | mvebu_hwcc_sync_io_barrier(); | ||
102 | } | ||
103 | |||
104 | static void mvebu_hwcc_dma_sync(struct device *dev, dma_addr_t dma_handle, | ||
105 | size_t size, enum dma_data_direction dir) | ||
106 | { | ||
107 | if (dir != DMA_TO_DEVICE) | ||
108 | mvebu_hwcc_sync_io_barrier(); | ||
109 | } | ||
110 | |||
111 | static struct dma_map_ops mvebu_hwcc_dma_ops = { | ||
112 | .alloc = arm_dma_alloc, | ||
113 | .free = arm_dma_free, | ||
114 | .mmap = arm_dma_mmap, | ||
115 | .map_page = mvebu_hwcc_dma_map_page, | ||
116 | .unmap_page = mvebu_hwcc_dma_unmap_page, | ||
117 | .get_sgtable = arm_dma_get_sgtable, | ||
118 | .map_sg = arm_dma_map_sg, | ||
119 | .unmap_sg = arm_dma_unmap_sg, | ||
120 | .sync_single_for_cpu = mvebu_hwcc_dma_sync, | ||
121 | .sync_single_for_device = mvebu_hwcc_dma_sync, | ||
122 | .sync_sg_for_cpu = arm_dma_sync_sg_for_cpu, | ||
123 | .sync_sg_for_device = arm_dma_sync_sg_for_device, | ||
124 | .set_dma_mask = arm_dma_set_mask, | ||
125 | }; | ||
126 | |||
127 | static int mvebu_hwcc_notifier(struct notifier_block *nb, | 80 | static int mvebu_hwcc_notifier(struct notifier_block *nb, |
128 | unsigned long event, void *__dev) | 81 | unsigned long event, void *__dev) |
129 | { | 82 | { |
@@ -131,7 +84,7 @@ static int mvebu_hwcc_notifier(struct notifier_block *nb, | |||
131 | 84 | ||
132 | if (event != BUS_NOTIFY_ADD_DEVICE) | 85 | if (event != BUS_NOTIFY_ADD_DEVICE) |
133 | return NOTIFY_DONE; | 86 | return NOTIFY_DONE; |
134 | set_dma_ops(dev, &mvebu_hwcc_dma_ops); | 87 | set_dma_ops(dev, &arm_coherent_dma_ops); |
135 | 88 | ||
136 | return NOTIFY_OK; | 89 | return NOTIFY_OK; |
137 | } | 90 | } |
@@ -246,14 +199,9 @@ static int coherency_type(void) | |||
246 | return type; | 199 | return type; |
247 | } | 200 | } |
248 | 201 | ||
249 | /* | ||
250 | * As a precaution, we currently completely disable hardware I/O | ||
251 | * coherency, until enough testing is done with automatic I/O | ||
252 | * synchronization barriers to validate that it is a proper solution. | ||
253 | */ | ||
254 | int coherency_available(void) | 202 | int coherency_available(void) |
255 | { | 203 | { |
256 | return false; | 204 | return coherency_type() != COHERENCY_FABRIC_TYPE_NONE; |
257 | } | 205 | } |
258 | 206 | ||
259 | int __init coherency_init(void) | 207 | int __init coherency_init(void) |