Merge branch 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason...

[sfrench/cifs-2.6.git] / Documentation / rapidio / tsi721.txt

diff --git a/Documentation/rapidio/tsi721.txt b/Documentation/rapidio/tsi721.txt
index 7c1c7bf48ec0ae58f506a75655d5a8ef176879fc..cd2a2935d51db1b88068e424af176958bab462c2 100644 (file)
--- a/Documentation/rapidio/tsi721.txt
+++ b/Documentation/rapidio/tsi721.txt
@@ -25,6 +25,32 @@ 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).
+
+- 'pcie_mrrs' - override value for PCIe Maximum Read Request Size (MRRS).
+        This parameter gives an ability to override MRRS value set during PCIe
+        configuration process. Tsi721 supports read request sizes up to 4096B.
+        Value for this parameter must be set as defined by PCIe specification:
+        0 = 128B, 1 = 256B, 2 = 512B, 3 = 1024B, 4 = 2048B and 5 = 4096B.
+        Default value is '-1' (= keep platform setting).
+
+- 'mbox_sel' - RIO messaging MBOX selection mask. This is a bitmask that defines
+        messaging MBOXes are managed by this device driver. Mask bits 0 - 3
+        correspond to MBOX0 - MBOX3. MBOX is under driver's control if the
+        corresponding bit is set to '1'. Default value is 0x0f (= all).
+
 II. Known problems
 
   None.