diff options
| author | Niklas Schnelle <schnelle@linux.ibm.com> | 2024-09-26 16:08:30 +0200 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2024-10-10 15:32:43 +0200 |
| commit | 126034faaac5f356822c4a9bebfa75664da11056 (patch) | |
| tree | b901575a624b9d6e8e55465c392d2c3f03f2318a /arch/s390/include/asm/pci_clp.h | |
| parent | 0467cdde8c4320bbfdb31a8cff1277b202f677fc (diff) | |
s390/pci: Use topology ID for multi-function devices
The newly introduced topology ID (TID) field in the CLP Query PCI
Function explicitly identifies groups of PCI functions whose RIDs belong
to the same (sub-)topology. When available use the TID instead of the
PCHID to match zPCI busses/domains for multi-function devices. Note that
currently only a single PCI bus per TID is supported. This change is
required because in future machines the PCHID will not identify a PCI
card but a specific port in the case of some multi-port NICs while from
a PCI point of view the entire card is a subtopology.
Reviewed-by: Gerd Bayer <gbayer@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/pci_clp.h')
| -rw-r--r-- | arch/s390/include/asm/pci_clp.h | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/s390/include/asm/pci_clp.h b/arch/s390/include/asm/pci_clp.h index f0c677ddd270..14afb9ce91f3 100644 --- a/arch/s390/include/asm/pci_clp.h +++ b/arch/s390/include/asm/pci_clp.h @@ -110,7 +110,8 @@ struct clp_req_query_pci { struct clp_rsp_query_pci { struct clp_rsp_hdr hdr; u16 vfn; /* virtual fn number */ - u16 : 3; + u16 : 2; + u16 tid_avail : 1; u16 rid_avail : 1; u16 is_physfn : 1; u16 reserved1 : 1; @@ -130,8 +131,9 @@ struct clp_rsp_query_pci { u64 edma; /* end dma as */ #define ZPCI_RID_MASK_DEVFN 0x00ff u16 rid; /* BUS/DEVFN PCI address */ - u16 reserved0; - u32 reserved[10]; + u32 reserved0; + u16 tid; + u32 reserved[9]; u32 uid; /* user defined id */ u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */ u32 reserved2[16]; |