diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/device-tree/nvlink.rst | 27 | ||||
| -rw-r--r-- | doc/nvlink.rst | 22 |
2 files changed, 43 insertions, 6 deletions
diff --git a/doc/device-tree/nvlink.rst b/doc/device-tree/nvlink.rst index 8375dc4..6ce44e9 100644 --- a/doc/device-tree/nvlink.rst +++ b/doc/device-tree/nvlink.rst @@ -66,6 +66,27 @@ NPU bindings: }; }; +GPU memory bindings +------------------- + +.. code-block:: dts + + memory@100000000 { + device_type = "memory" + compatible = "ibm,coherent-device-memory"; + linux,usable-memory = <0x0 0x100000000 0x0 0x0>; + + ; denotes a region of unplugged system memory + + reg = <0x0 0x100000000 0x0 0x80000000>; + ibm,associativity = <0x4 0x0 0x0 0x0 0x64>; + + ; numa associativity for the memory once it is hotplugged + + phandle = <0x10000abc>; + linux,phandle = <0x10000abc>; + }; + Emulated PCI device bindings ---------------------------- @@ -83,7 +104,8 @@ Emulated PCI device bindings ibm,pci-config-space-type = <0x1>; vendor-id = <0x1014>; ibm,gpu = <0x100002f7>; /* phandle pointing the associated GPU PCI device node */ - phandle = <0x100002fc>; + memory-region = <0x10000abc>; /* phandle pointing to the GPU memory */ + phandle = <0x100002fc>; }; pci@1 { @@ -94,6 +116,7 @@ Emulated PCI device bindings ibm,pci-config-space-type = <0x1>; vendor-id = <0x1014>; ibm,gpu = <0x100002f5>; + memory-region = <0x10000def>; phandle = <0x100002fe>; class-code = <0x60400>; linux,phandle = <0x100002fe>; @@ -107,6 +130,7 @@ Emulated PCI device bindings ibm,pci-config-space-type = <0x1>; vendor-id = <0x1014>; ibm,gpu = <0x100002f7>; + memory-region = <0x10000abc>; phandle = <0x100002fd>; class-code = <0x60400>; linux,phandle = <0x100002fd>; @@ -120,6 +144,7 @@ Emulated PCI device bindings ibm,pci-config-space-type = <0x1>; vendor-id = <0x1014>; ibm,gpu = <0x100002f5>; + memory-region = <0x10000def>; phandle = <0x100002ff>; class-code = <0x60400>; linux,phandle = <0x100002ff>; diff --git a/doc/nvlink.rst b/doc/nvlink.rst index d035968..cba64df 100644 --- a/doc/nvlink.rst +++ b/doc/nvlink.rst @@ -38,14 +38,15 @@ related to the setup of DMA windows. Configuration Space Parameters ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ -============ =============== ===== -============ =============== ===== -Vendor ID 0x1014 (IBM) +============ =================== ===== +============ =================== ===== +Vendor ID 0x1014 (IBM) Device ID 0x04ea Revision ID 0x00 -Class 0x068000 (Bridge Device Other, ProgIf = 0x0) +Class 0x068000 / 0x068001 (Bridge Device Other, ProgIf = 0x0 / 0x1) BAR0/1 TL/DL Registers -============ =============== ===== +BAR2/3 GEN-ID Registers (Only for rev-id = 0x1) +============ =================== ===== TL/DL Registers ^^^^^^^^^^^^^^^ @@ -59,6 +60,17 @@ to 64-bit BAR#0 of the emulated PCI device configuration space. :: | DL (64K) | BAR#0 +-----------+ +Generation Registers (GEN-ID) +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +On POWER9 each link has 64K of generation ID registers for the relaxed +ordering mode syncronisation. Refer to the programming guide for +details of the register layout in this BAR. + +Relaxed ordering mode will be disabled by default as it requires +device driver support. Device drivers will need to request relaxed +ordering mode through some yet to be designed mechanism. + Vendor Specific Capabilities ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ :: |