diff options
| author | Amit Cohen <[email protected]> | 2024-10-25 16:26:27 +0200 |
|---|---|---|
| committer | Jakub Kicinski <[email protected]> | 2024-10-30 18:24:39 -0700 |
| commit | d0fbdc3ae9ecc614ddffde55dccbcacef353da0b (patch) | |
| tree | 0c68f17b0f0c941fd90ba4108667963cf80eff94 | |
| parent | 15f73e601a9c67aa83bde92b2d940a6532d8614d (diff) | |
mlxsw: pci: Sync Rx buffers for device
Non-coherent architectures, like ARM, may require invalidating caches
before the device can use the DMA mapped memory, which means that before
posting pages to device, drivers should sync the memory for device.
Sync for device can be configured as page pool responsibility. Set the
relevant flag and define max_len for sync.
Cc: Jiri Pirko <[email protected]>
Fixes: b5b60bb491b2 ("mlxsw: pci: Use page pool for Rx buffers allocation")
Signed-off-by: Amit Cohen <[email protected]>
Reviewed-by: Ido Schimmel <[email protected]>
Signed-off-by: Petr Machata <[email protected]>
Link: https://patch.msgid.link/92e01f05c4f506a4f0a9b39c10175dcc01994910.1729866134.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <[email protected]>
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlxsw/pci.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.c b/drivers/net/ethernet/mellanox/mlxsw/pci.c index 2320a5f323b4..d6f37456fb31 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/pci.c +++ b/drivers/net/ethernet/mellanox/mlxsw/pci.c @@ -996,12 +996,13 @@ static int mlxsw_pci_cq_page_pool_init(struct mlxsw_pci_queue *q, if (cq_type != MLXSW_PCI_CQ_RDQ) return 0; - pp_params.flags = PP_FLAG_DMA_MAP; + pp_params.flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV; pp_params.pool_size = MLXSW_PCI_WQE_COUNT * mlxsw_pci->num_sg_entries; pp_params.nid = dev_to_node(&mlxsw_pci->pdev->dev); pp_params.dev = &mlxsw_pci->pdev->dev; pp_params.napi = &q->u.cq.napi; pp_params.dma_dir = DMA_FROM_DEVICE; + pp_params.max_len = PAGE_SIZE; page_pool = page_pool_create(&pp_params); if (IS_ERR(page_pool)) |