On 12/13/2023 7:05 PM, Margolin, Michael wrote:
> On 12/11/2023 7:50 PM, Jason Gunthorpe wrote:
>> CAUTION: This email originated from outside of the organization. Do not click links or open attachments unless you can confirm the sender and know the content is safe.
>>
>>
>>
>> On Mon, Dec 11, 2023 at 05:47:15PM +0000, Michael Margolin wrote:
>>> diff --git a/drivers/infiniband/hw/efa/efa_admin_cmds_defs.h b/drivers/infiniband/hw/efa/efa_admin_cmds_defs.h
>>> index 9c65bd27bae0..597f7ca6f31d 100644
>>> --- a/drivers/infiniband/hw/efa/efa_admin_cmds_defs.h
>>> +++ b/drivers/infiniband/hw/efa/efa_admin_cmds_defs.h
>>> @@ -415,6 +415,32 @@ struct efa_admin_reg_mr_resp {
>>> * memory region
>>> */
>>> u32 r_key;
>>> +
>>> + /*
>>> + * Mask indicating which fields have valid values
>>> + * 0 : recv_pci_bus_id
>>> + * 1 : rdma_read_pci_bus_id
>>> + * 2 : rdma_recv_pci_bus_id
>>> + */
>>> + u8 validity;
>>> +
>>> + /*
>>> + * Physical PCIe bus used by the device to reach the MR for receive
>>> + * operation
>>> + */
>>> + u8 recv_pci_bus_id;
>>> +
>>> + /*
>>> + * Physical PCIe bus used by the device to reach the MR for RDMA read
>>> + * operation
>>> + */
>>> + u8 rdma_read_pci_bus_id;
>>> +
>>> + /*
>>> + * Physical PCIe bus used by the device to reach the MR for RDMA write
>>> + * receive
>>> + */
>>> + u8 rdma_recv_pci_bus_id;
>> What driver is bound to this other PCIe bus and how did the iommu get
>> setup for it?
>>
>> Jason
> It's internal bus that is not directly exposed to the host. Addresses
> mapping is acquired from accelerator's driver as for any MR residing in
> accelerator memory, and the translation is owned by devices on that bus.
>
>
> Michael
Hi,
Just want to make sure if there are any questions / comments regarding
to this patch that haven't been addressed?
Michael
