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authorAlexandre Bounine <alexandre.bounine@idt.com>2012-10-04 17:15:57 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-06 03:05:21 +0900
commitda1589f07393e88e917c317ea0c85ea37918a1cf (patch)
tree8ddfa8af4b15b463fb9f7f14f3e49b7f7d62248a /include/linux/rio.h
parent18f6287f538858135c2c7ed4f76d4441e28b5714 (diff)
downloadop-kernel-dev-da1589f07393e88e917c317ea0c85ea37918a1cf.zip
op-kernel-dev-da1589f07393e88e917c317ea0c85ea37918a1cf.tar.gz
rapidio: add inbound memory mapping interface
Add common inbound memory mapping/unmapping interface. This allows to make local memory space accessible from the RapidIO side using hardware mapping capabilities of RapidIO bridging devices. The new interface is intended to enable data transfers between RapidIO devices in combination with DMA engine support. This patch is based on patch submitted by Li Yang <leoli@freescale.com> (https://lists.ozlabs.org/pipermail/linuxppc-dev/2009-April/071210.html) Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Li Yang <leoli@freescale.com> Cc: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/rio.h')
-rw-r--r--include/linux/rio.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/rio.h b/include/linux/rio.h
index ba382f2..4d1a104 100644
--- a/include/linux/rio.h
+++ b/include/linux/rio.h
@@ -301,6 +301,8 @@ struct rio_net {
* @add_outb_message: Callback to add a message to an outbound mailbox queue.
* @add_inb_buffer: Callback to add a buffer to an inbound mailbox queue.
* @get_inb_message: Callback to get a message from an inbound mailbox queue.
+ * @map_inb: Callback to map RapidIO address region into local memory space.
+ * @unmap_inb: Callback to unmap RapidIO address region mapped with map_inb().
*/
struct rio_ops {
int (*lcread) (struct rio_mport *mport, int index, u32 offset, int len,
@@ -323,6 +325,9 @@ struct rio_ops {
int mbox, void *buffer, size_t len);
int (*add_inb_buffer)(struct rio_mport *mport, int mbox, void *buf);
void *(*get_inb_message)(struct rio_mport *mport, int mbox);
+ int (*map_inb)(struct rio_mport *mport, dma_addr_t lstart,
+ u64 rstart, u32 size, u32 flags);
+ void (*unmap_inb)(struct rio_mport *mport, dma_addr_t lstart);
};
#define RIO_RESOURCE_MEM 0x00000100
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