IBM Power System 9009-42A Manual page 18

Table 4. PCIe slot locations and descriptions for system (continued)
Location Description Processor
code module
P1-C8 1, 3
PCIe4 x8 Processor
module
SCM0
P1-C9 1
PCIe4 x16 Processor
module
SCM0
P1-C10 4
PCIe3 x8 PCIe3
switch,
S2P16
P1-C11 4
PCIe3 x8 PCIe3
(default switch,
LAN slot) S2P17
P1-C12 2, 4
PCIe3 x8 PCIe3
with x16 switch,
connector S1P8
1 High-performance slot that is directly connected to the processor module. The connectors in these slots are differently colored than the slots from the PCIe3
switches.
2 Slots P1-C6 and P1-C12 have Gen3 x16 connectors, but will only function as Gen3 x8.
3 Slots P1-C2 and P1-C8 have Gen4 x16 connectors, but will only function as Gen4 x8.
4 Slot connected by PCIe3 switches.
5 Enabling the I/O adapter enlarged capacity option will only affect Linux partitions. If your system doesn't have Linux partitions, the I/O Adapter Enlarged
Capacity setting should be disabled.
Notes:
• The peak bandwidths supported by the x16 slots are 32 gigabytes per second (GBps) in simplex mode and 64 GBps in duplex mode.
• The peak bandwidths supported by P1-C5, P1-C6, P1-C7, P1-C10, P1-C11, and P1-C12 x8 slots are 8 GBps in simplex mode and 16 GBps in duplex mode.
• The peak bandwidths supported by P1-C2 and P1-C8 x8 slots are 16 GBps in simplex mode and 32 GBps in duplex mode.
• All slots support enhanced error handling (EEH).
• All PCIe slots are hot swappable and support concurrent maintenance.
Firmware slot capabilities
System PCIe slots are allocated direct memory access (DMA) space using the following algorithm:
• All slots are allocated a 2 GB default DMA window.
• All I/O adapter slots (except the embedded USB) are allocated Dynamic DMA Window (DDW) capability
based on installed platform memory. DDW capability is calculated assuming 4 K I/O mappings:
– For systems with less than 64 GB of memory, slots are allocated 16 GB of DDW capability.
– For systems with at least 64 GB of memory, but less than 128 GB of memory, slots are allocated 32
GB of DDW capability.
– For systems with 128 GB or more of memory, slots are allocated 64 GB of DDW capability.
– Slots can be enabled with Huge Dynamic DMA Window capability (HDDW) using the I/O Adapter
Enlarged Capacity setting in the Advanced System Management Interface (ASMI).
– HDDW enabled slots are allocated enough DDW capability to map all of installed platform memory
using 64 K I/O mappings.
– Minimum DMA window size for HDDW enabled slots is 32 GB.
– Slots that are HDDW enabled are allocated the larger of the calculated DDW capability and HDDW
capability.
4 Power Systems: PCIe adapter placement for the 9009-41A, 9009-42A, or 9223-42H
Adapter
size
CAPI SR-IOV
Full-height, Yes Yes
half-length
Full-height, Yes Yes
half-length
Full-height, No Yes
half-length
Full-height, No Yes
half-length
Full-height, No Yes
half-length
Slot capabilities
32-bit I/O adapter I/O adapter
dynamic enlarged enlarged
direct capacity capacity
memory enablemen enablemen
t order 5
access t order
5 (9009-42
(DMA) GB (9009-41A)
A and
9223-42H)
2 2 4
2 1 1
2 6 9
2 8 11
2 4 7
Slot availability
9009-41A, 9009-42A
9009-42A, and
and 9223-42H
9223-42H (two
(one processors)
processor)
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes