Documentation: PCI: endpoint: Document BAR assignment

It is now possible to assign BARs while creating a vNTB endpoint function.
Update the documentation accordingly.

Suggested-by: Bjorn Helgaas <helgaas@kernel.org>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Manivannan Sadhasivam <mani@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://patch.msgid.link/20250731-vntb-doc-v1-1-95a0e0cd28d0@baylibre.com

diff --git a/Documentation/PCI/endpoint/pci-vntb-howto.rst b/Documentation/PCI/endpoint/pci-vntb-howto.rst
index 70d3bc90893f3315a7dff394d57e45c8378e2a54..9a7a2f0a68498e8b4297f24261954558d45c43a9 100644 (file)
--- a/Documentation/PCI/endpoint/pci-vntb-howto.rst
+++ b/Documentation/PCI/endpoint/pci-vntb-howto.rst
@@ -90,8 +90,9 @@ of the function device and is populated with the following NTB specific
 attributes that can be configured by the user::
 
        # ls functions/pci_epf_vntb/func1/pci_epf_vntb.0/
-       db_count    mw1         mw2         mw3         mw4         num_mws
-       spad_count
+       ctrl_bar  db_count  mw1_bar  mw2_bar  mw3_bar  mw4_bar  spad_count
+       db_bar    mw1       mw2      mw3      mw4      num_mws  vbus_number
+       vntb_vid  vntb_pid
 
 A sample configuration for NTB function is given below::
 
@@ -100,6 +101,10 @@ A sample configuration for NTB function is given below::
        # echo 1 > functions/pci_epf_vntb/func1/pci_epf_vntb.0/num_mws
        # echo 0x100000 > functions/pci_epf_vntb/func1/pci_epf_vntb.0/mw1
 
+By default, each construct is assigned a BAR, as needed and in order.
+Should a specific BAR setup be required by the platform, BAR may be assigned
+to each construct using the related ``XYZ_bar`` entry.
+
 A sample configuration for virtual NTB driver for virtual PCI bus::
 
        # echo 0x1957 > functions/pci_epf_vntb/func1/pci_epf_vntb.0/vntb_vid