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-rw-r--r--Documentation/rapidio/tsi721.txt14
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/rapidio/tsi721.txt b/Documentation/rapidio/tsi721.txt
index 7c1c7bf48ec0..0e0e90bef882 100644
--- a/Documentation/rapidio/tsi721.txt
+++ b/Documentation/rapidio/tsi721.txt
@@ -25,6 +25,20 @@ fully compatible with RIONET driver (Ethernet over RapidIO messaging services).
This parameter can be changed dynamically.
Use CONFIG_RAPIDIO_DEBUG=y to enable debug output at the top level.
+- 'dma_desc_per_channel' - This parameter defines number of hardware buffer
+ descriptors allocated for each registered Tsi721 DMA channel.
+ Its default value is 128.
+
+- 'dma_txqueue_sz' - DMA transactions queue size. Defines number of pending
+ transaction requests that can be accepted by each DMA channel.
+ Default value is 16.
+
+- 'dma_sel' - DMA channel selection mask. Bitmask that defines which hardware
+ DMA channels (0 ... 6) will be registered with DmaEngine core.
+ If bit is set to 1, the corresponding DMA channel will be registered.
+ DMA channels not selected by this mask will not be used by this device
+ driver. Default value is 0x7f (use all channels).
+
II. Known problems
None.