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sfc: add tracing of MCDI commands

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MCDI tracing is conditional on CONFIG_SFC_MCDI_LOGGING, which is enabled
 by default.

Each MCDI command will produce a console line like
    sfc dom🚌dev:fn ifname: MCDI RPC REQ: xxxxxxxx [yyyyyyyy...]
where xxxxxxxx etc. are the raw MCDI payload in 32-bit hex chunks.
The response will then produce a similar line with "RESP" instead of "REQ",
 and containing the MCDI response payload (if any).

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Edward Cree 2015-05-27 13:13:54 +01:00 • committed by David S. Miller
commit 75aba2a52d
4 changed files with 102 additions and 4 deletions
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3
drivers/net/ethernet/sfc/ef10.c
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@ -267,6 +267,9 @@ static int efx_ef10_probe(struct efx_nic *efx)
return -ENOMEM;
efx->nic_data = nic_data;
/* we assume later that we can copy from this buffer in dwords */
BUILD_BUG_ON(MCDI_CTL_SDU_LEN_MAX_V2 % 4);
rc = efx_nic_alloc_buffer(efx, &nic_data->mcdi_buf,
8 + MCDI_CTL_SDU_LEN_MAX_V2, GFP_KERNEL);
if (rc)