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docs: ntb.txt: use Sphinx notation for the two ascii figures 

In order to make it to build with Sphinx, we need to fix the
notation for two ascii artwork.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
hifive-unleashed-5.2
Mauro Carvalho Chehab 2019-04-10 06:56:23 -03:00 committed by Jonathan Corbet
parent 26187d18b8
commit 3ac10b0255
1 changed files with 6 additions and 4 deletions
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10
Documentation/ntb.txt
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@ -41,9 +41,10 @@ mainly used to perform the proper memory window initialization. Typically
there are two types of memory window interfaces supported by the NTB API:
inbound translation configured on the local ntb port and outbound translation
configured by the peer, on the peer ntb port. The first type is
depicted on the next figure
depicted on the next figure::
Inbound translation:
Inbound translation:
Memory: Local NTB Port: Peer NTB Port: Peer MMIO:
____________
| dma-mapped |-ntb_mw_set_trans(addr) |
@ -58,9 +59,10 @@ maps corresponding outbound memory window so to have access to the shared
memory region.
The second type of interface, that implies the shared windows being
initialized by a peer device, is depicted on the figure:
initialized by a peer device, is depicted on the figure::
Outbound translation:
Outbound translation:
Memory: Local NTB Port: Peer NTB Port: Peer MMIO:
____________ ______________
| dma-mapped | | | MW base addr |<== memory-mapped IO