IBM Power Systems 9043-MRX Manual page 16

Table 2. Slot locations and descriptions for the 9043-MRX system (continued)
Location code Description
P0-C4 PCIe4 x16 or PCIe5
x8
P0-C5 PCIe4 x16
P0-C6 PCIe4 x8
P0-C7 PCIe4 x8 or PCIe5
x8
P0-C8 PCIe4 x16 or PCIe5
x8
P0-C9 PCIe4 x8
P0-C10 PCIe4 x8 or PCIe5
x8
P0-C11 PCIe4 x16 or PCIe5
x8
1 Assigned PCIe slot order when the I/O Adapter Enlarged Capacity option is enabled. For example, if the option was enabled with a value of 5, five slots are enabled with the I/O enlarged capacity.
Note: Enabling the I/O Adapter Enlarged Capacity option will only affect Linux
2 P0-C1 is a general-purposed x8 slot and it is generally used for the Base Ethernet card. The default Base Ethernet card is EC2U.
Note the following:
• The I/O cassettes that are used in the 9043-MRX system can hold half length, full height and half length, half height PCIe adapters.
• All PCIe slots support the single root I/O virtualization (SR-IOV) function.
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 4K 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 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.
Adapter placement rules
Use this information while selecting slots for installing adapters in the 9043-MRX system. Use Table 3 on
page 3 to identify adapter slot placement priorities and maximums for the system.
1. All of the x16 PCIe slots are general purpose PCIe slot.
2. Six of the x16 PCIe slots support NVlink or OpenCAPI 25 Gbs cable cards.
3. P0-C0 is for the eBMC card assembly.
4. P0-C1 is generally used for the Base Ethernet card.
5. 2 processor configuration only have P0-C8, P0-C11, P0-C7, and P0-C10 slots available for cable card.
Verify whether the adapter is supported for your system. The feature code (FC) column in the following
table lists all of the supported adapters for systems. You can select the FC for more details. To view
a list of adapters supported in the Power10 processor-based systems and the EMX0 PCIe3 expansion
drawer, see Adapter information by feature code for the 9043-MRX, 9105-22A, 9105-22B, 9105-41B,
2 Power Systems: Adapter placement for the 9043-MRX
SCM / PHB
OpenCAPI Cable adapter
0/3 Yes Yes
0/0 No Yes
1/4 Yes
1/3 Yes Yes
1/0 Yes
0/4 No Yes
0/3 No Yes
0/0 No Yes
®
partitions. If your system does not have Linux partitions, the I/O Adapter Enlarged Capacity setting should be disabled.
Slot capabilities
Dynamic direct Enlarged capacity
assign order 1
memory access
(DMA) window
Yes 3
Yes 9
No Yes 6
Yes 2
No Yes 11
Yes 5
Yes 1
Yes 10
Slot availability
2 processors 3 processors 4 processors
No Yes
No Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes