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| author | Kelvin Cao <kelvin.cao@microsemi.com> | 2017-11-29 20:55:24 +0300 |
|---|---|---|
| committer | Jon Mason <jdmason@kudzu.us> | 2018-01-29 06:17:23 +0300 |
| commit | 3df54c870f52b4c47b53eead8d22a109f741b91c (patch) | |
| tree | 2d5a63d9462ff3533eb56bf4f0e200d6f508303f /include/linux/switchtec.h | |
| parent | 2dd0f6a64a36bf7176c6055c919da3f53b7924f3 (diff) | |
| download | linux-3df54c870f52b4c47b53eead8d22a109f741b91c.tar.xz | |
ntb_hw_switchtec: Allow using Switchtec NTB in multi-partition setups
Allow using Switchtec NTB in setups that have more than two partitions.
Note: this does not enable having multi-host communication, it only
allows for a single NTB link between two hosts in a network that might
have more than two.
Use following logic to determine the NT peer partition:
1) If there are 2 partitions, and the target vector is set in
the Switchtec configuration, use the partition specified in target
vector.
2) If there are 2 partitions and target vector is unset
use the only other partition as specified in the NT EP map.
3) If there are more than 2 partitions and target vector is set
use the other partition specified in target vector.
4) If there are more than 2 partitions and target vector is unset,
this is invalid and report an error.
Signed-off-by: Kelvin Cao <kelvin.cao@microsemi.com>
[logang@deltatee.com: commit message fleshed out]
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Jon Mason <jdmason@kudzu.us>
Diffstat (limited to 'include/linux/switchtec.h')
| -rw-r--r-- | include/linux/switchtec.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/switchtec.h b/include/linux/switchtec.h index 09d73d0d1aa8..d4a7c18b42cf 100644 --- a/include/linux/switchtec.h +++ b/include/linux/switchtec.h @@ -168,6 +168,14 @@ struct ntb_info_regs { u16 reserved1; u64 ep_map; u16 requester_id; + u16 reserved2; + u32 reserved3[4]; + struct nt_partition_info { + u32 xlink_enabled; + u32 target_part_low; + u32 target_part_high; + u32 reserved; + } ntp_info[48]; } __packed; struct part_cfg_regs { |