[v9,16/17] Documentation: PCI: Add configfs binding documentation for pci-ntb endpoint function

Commit Message

Kishon Vijay Abraham I Jan. 4, 2021, 3:29 p.m. UTC

Add binding documentation for pci-ntb endpoint function that helps in
adding and configuring pci-ntb endpoint function.

Signed-off-by: Kishon Vijay Abraham I <[e-mail]>
---
 .../PCI/endpoint/function/binding/pci-ntb.rst | 38 +++++++++++++++++++
 Documentation/PCI/endpoint/index.rst          |  1 +
 2 files changed, 39 insertions(+)
 create mode 100644 Documentation/PCI/endpoint/function/binding/pci-ntb.rst

Patch

diff --git a/Documentation/PCI/endpoint/function/binding/pci-ntb.rst b/Documentation/PCI/endpoint/function/binding/pci-ntb.rst
new file mode 100644
index 000000000000..40253d3d5163
--- /dev/null
+++ b/Documentation/PCI/endpoint/function/binding/pci-ntb.rst
@@ -0,0 +1,38 @@ 
+.. SPDX-License-Identifier: GPL-2.0
+
+==========================
+PCI NTB Endpoint Function
+==========================
+
+1) Create a subdirectory to pci_epf_ntb directory in configfs.
+
+Standard EPF Configurable Fields:
+
+================   ===========================================================
+vendorid	   should be 0x104c
+deviceid	   should be 0xb00d for TI's J721E SoC
+revid		   don't care
+progif_code	   don't care
+subclass_code	   should be 0x00
+baseclass_code	   should be 0x5
+cache_line_size	   don't care
+subsys_vendor_id   don't care
+subsys_id	   don't care
+interrupt_pin	   don't care
+msi_interrupts	   don't care
+msix_interrupts	   don't care
+================   ===========================================================
+
+2) Create a subdirectory to directory created in 1
+
+NTB EPF specific configurable fields:
+
+================   ===========================================================
+db_count	   Number of doorbells; default = 4
+mw1     	   size of memory window1
+mw2     	   size of memory window2
+mw3     	   size of memory window3
+mw4     	   size of memory window4
+num_mws     	   Number of memory windows; max = 4
+spad_count     	   Number of scratchpad registers; default = 64
+================   ===========================================================
diff --git a/Documentation/PCI/endpoint/index.rst b/Documentation/PCI/endpoint/index.rst
index ef6861128506..9cb6e5f3c4d5 100644
--- a/Documentation/PCI/endpoint/index.rst
+++ b/Documentation/PCI/endpoint/index.rst
@@ -14,3 +14,4 @@  PCI Endpoint Framework
    pci-ntb-function
 
    function/binding/pci-test
+   function/binding/pci-ntb