Displaying 5 results from an estimated 5 matches for "of_dma_get_rang".
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of_dma_get_range
2017 Feb 01
3
[PATCH] virtio: Try to untangle DMA coherency
...com>
---
drivers/of/address.c | 32 ++++++++++++++++++++++++++++++--
1 file changed, 30 insertions(+), 2 deletions(-)
diff --git a/drivers/of/address.c b/drivers/of/address.c
index 02b2903fe9d2..af29b115b8aa 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -891,19 +891,47 @@ int of_dma_get_range(struct device_node *np, u64 *dma_addr, u64 *paddr, u64 *siz
}
EXPORT_SYMBOL_GPL(of_dma_get_range);
+/*
+ * DMA from some device types is always cache-coherent, and in some unfortunate
+ * cases the "dma-coherent" property is not used.
+ */
+static const char *of_device_dma_coherent_t...
2017 Feb 01
3
[PATCH] virtio: Try to untangle DMA coherency
...com>
---
drivers/of/address.c | 32 ++++++++++++++++++++++++++++++--
1 file changed, 30 insertions(+), 2 deletions(-)
diff --git a/drivers/of/address.c b/drivers/of/address.c
index 02b2903fe9d2..af29b115b8aa 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -891,19 +891,47 @@ int of_dma_get_range(struct device_node *np, u64 *dma_addr, u64 *paddr, u64 *siz
}
EXPORT_SYMBOL_GPL(of_dma_get_range);
+/*
+ * DMA from some device types is always cache-coherent, and in some unfortunate
+ * cases the "dma-coherent" property is not used.
+ */
+static const char *of_device_dma_coherent_t...
2017 Feb 01
0
[PATCH] virtio: Try to untangle DMA coherency
...32 ++++++++++++++++++++++++++++++--
> 1 file changed, 30 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/of/address.c b/drivers/of/address.c
> index 02b2903fe9d2..af29b115b8aa 100644
> --- a/drivers/of/address.c
> +++ b/drivers/of/address.c
> @@ -891,19 +891,47 @@ int of_dma_get_range(struct device_node *np, u64 *dma_addr, u64 *paddr, u64 *siz
> }
> EXPORT_SYMBOL_GPL(of_dma_get_range);
>
> +/*
> + * DMA from some device types is always cache-coherent, and in some unfortunate
> + * cases the "dma-coherent" property is not used.
> + */
> +sta...
2017 Feb 01
4
[PATCH] virtio: Try to untangle DMA coherency
By forcing on DMA API usage for ARM systems, we have inadvertently
kicked open a hornets' nest in terms of cache-coherency. Namely that
unless the virtio device is explicitly described as capable of coherent
DMA by firmware, the DMA APIs on ARM and other DT-based platforms will
assume it is non-coherent. This turns out to cause a big problem for the
likes of QEMU and kvmtool, which generate
2017 Feb 01
4
[PATCH] virtio: Try to untangle DMA coherency
By forcing on DMA API usage for ARM systems, we have inadvertently
kicked open a hornets' nest in terms of cache-coherency. Namely that
unless the virtio device is explicitly described as capable of coherent
DMA by firmware, the DMA APIs on ARM and other DT-based platforms will
assume it is non-coherent. This turns out to cause a big problem for the
likes of QEMU and kvmtool, which generate