diff options
| author | Ohad Sharabi <osharabi@habana.ai> | 2022-12-18 10:42:34 +0300 |
|---|---|---|
| committer | Oded Gabbay <ogabbay@kernel.org> | 2023-01-26 12:52:10 +0300 |
| commit | 20faaeec3794661c1d73578316691174a5a0e5a9 (patch) | |
| tree | a390f01c243d2fcabe40cd0d625c2627eb4ee073 /drivers/accel/habanalabs/common/habanalabs.h | |
| parent | e65e175b07bef5974045cc42238de99057669ca7 (diff) | |
| download | linux-20faaeec3794661c1d73578316691174a5a0e5a9.tar.xz | |
habanalabs: add uapi to flush inbound HBM transactions
When doing p2p with a NIC device, the NIC needs to make sure all the
writes to the HBM (through the PCI bar of the Gaudi device) were
flushed.
It can be done by either the NIC or the host reading through the PCI
bar.
To support the host side, we supply a simple uapi to perform this flush
through the driver, because the user can't create such a transaction
by itself (the PCI bar isn't exposed to normal users).
Signed-off-by: Ohad Sharabi <osharabi@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Diffstat (limited to 'drivers/accel/habanalabs/common/habanalabs.h')
| -rw-r--r-- | drivers/accel/habanalabs/common/habanalabs.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/accel/habanalabs/common/habanalabs.h b/drivers/accel/habanalabs/common/habanalabs.h index 7b6f10033ee9..95bbc00c6262 100644 --- a/drivers/accel/habanalabs/common/habanalabs.h +++ b/drivers/accel/habanalabs/common/habanalabs.h @@ -375,7 +375,8 @@ enum hl_cs_type { CS_TYPE_COLLECTIVE_WAIT, CS_RESERVE_SIGNALS, CS_UNRESERVE_SIGNALS, - CS_TYPE_ENGINE_CORE + CS_TYPE_ENGINE_CORE, + CS_TYPE_FLUSH_PCI_HBW_WRITES, }; /* @@ -644,6 +645,8 @@ struct hl_hints_range { * (i.e. the DRAM supports multiple page sizes), otherwise * it will shall be equal to dram_page_size. * @num_engine_cores: number of engine cpu cores + * @hbw_flush_reg: register to read to generate HBW flush. value of 0 means HBW flush is + * not supported. * @collective_first_sob: first sync object available for collective use * @collective_first_mon: first monitor available for collective use * @sync_stream_first_sob: first sync object available for sync stream use @@ -764,6 +767,7 @@ struct asic_fixed_properties { u32 xbar_edge_enabled_mask; u32 device_mem_alloc_default_page_size; u32 num_engine_cores; + u32 hbw_flush_reg; u16 collective_first_sob; u16 collective_first_mon; u16 sync_stream_first_sob; |