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sfc: detect ef100 MAE admin privilege/capability at probe time

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One PCIe function per network port (more precisely, per m-port group) is
 responsible for configuring the Match-Action Engine which performs
 switching and packet modification in the slice to support flower/OVS
 offload.  The GRP_MAE bit in the privilege mask indicates whether a
 given function has this capability.
At probe time, call MCDIs to read the calling function's privilege mask,
 and store the GRP_MAE bit in a new ef100_nic_data member.

Signed-off-by: Edward Cree <ecree.xilinx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Edward Cree 2022-07-20 19:29:26 +01:00 committed by David S. Miller
parent 8ca353da9c
commit 95287e1b4e
4 changed files with 55 additions and 0 deletions
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7
drivers/net/ethernet/sfc/ef100_nic.c
View File

@ -946,6 +946,7 @@ static int ef100_probe_main(struct efx_nic *efx)
unsigned int bar_size = resource_size(&efx->pci_dev->resource[efx->mem_bar]);
struct ef100_nic_data *nic_data;
char fw_version[32];
u32 priv_mask = 0;
int i, rc;
if (WARN_ON(bar_size == 0))
@ -1027,6 +1028,12 @@ static int ef100_probe_main(struct efx_nic *efx)
efx_mcdi_print_fwver(efx, fw_version, sizeof(fw_version));
pci_dbg(efx->pci_dev, "Firmware version %s\n", fw_version);
rc = efx_mcdi_get_privilege_mask(efx, &priv_mask);
if (rc) /* non-fatal, and priv_mask will still be 0 */
pci_info(efx->pci_dev,
"Failed to get privilege mask from FW, rc %d\n", rc);
nic_data->grp_mae = !!(priv_mask & MC_CMD_PRIVILEGE_MASK_IN_GRP_MAE);
if (compare_versions(fw_version, "1.1.0.1000") < 0) {
pci_info(efx->pci_dev, "Firmware uses old event descriptors\n");
rc = -EINVAL;

1
drivers/net/ethernet/sfc/ef100_nic.h
View File

@ -72,6 +72,7 @@ struct ef100_nic_data {
u8 port_id[ETH_ALEN];
DECLARE_BITMAP(evq_phases, EFX_MAX_CHANNELS);
u64 stats[EF100_STAT_COUNT];
bool grp_mae; /* MAE Privilege */
u16 tso_max_hdr_len;
u16 tso_max_payload_num_segs;
u16 tso_max_frames;

46
drivers/net/ethernet/sfc/mcdi.c
View File

@ -2129,6 +2129,52 @@ int efx_mcdi_get_workarounds(struct efx_nic *efx, unsigned int *impl_out,
return rc;
}
/* Failure to read a privilege mask is never fatal, because we can always
* carry on as though we didn't have the privilege we were interested in.
* So use efx_mcdi_rpc_quiet().
*/
int efx_mcdi_get_privilege_mask(struct efx_nic *efx, u32 *mask)
{
MCDI_DECLARE_BUF(fi_outbuf, MC_CMD_GET_FUNCTION_INFO_OUT_LEN);
MCDI_DECLARE_BUF(pm_inbuf, MC_CMD_PRIVILEGE_MASK_IN_LEN);
MCDI_DECLARE_BUF(pm_outbuf, MC_CMD_PRIVILEGE_MASK_OUT_LEN);
size_t outlen;
u16 pf, vf;
int rc;
if (!efx || !mask)
return -EINVAL;
/* Get our function number */
rc = efx_mcdi_rpc_quiet(efx, MC_CMD_GET_FUNCTION_INFO, NULL, 0,
fi_outbuf, MC_CMD_GET_FUNCTION_INFO_OUT_LEN,
&outlen);
if (rc != 0)
return rc;
if (outlen < MC_CMD_GET_FUNCTION_INFO_OUT_LEN)
return -EIO;
pf = MCDI_DWORD(fi_outbuf, GET_FUNCTION_INFO_OUT_PF);
vf = MCDI_DWORD(fi_outbuf, GET_FUNCTION_INFO_OUT_VF);
MCDI_POPULATE_DWORD_2(pm_inbuf, PRIVILEGE_MASK_IN_FUNCTION,
PRIVILEGE_MASK_IN_FUNCTION_PF, pf,
PRIVILEGE_MASK_IN_FUNCTION_VF, vf);
rc = efx_mcdi_rpc_quiet(efx, MC_CMD_PRIVILEGE_MASK,
pm_inbuf, sizeof(pm_inbuf),
pm_outbuf, sizeof(pm_outbuf), &outlen);
if (rc != 0)
return rc;
if (outlen < MC_CMD_PRIVILEGE_MASK_OUT_LEN)
return -EIO;
*mask = MCDI_DWORD(pm_outbuf, PRIVILEGE_MASK_OUT_OLD_MASK);
return 0;
}
#ifdef CONFIG_SFC_MTD
#define EFX_MCDI_NVRAM_LEN_MAX 128

1
drivers/net/ethernet/sfc/mcdi.h
View File

@ -366,6 +366,7 @@ int efx_mcdi_set_workaround(struct efx_nic *efx, u32 type, bool enabled,
unsigned int *flags);
int efx_mcdi_get_workarounds(struct efx_nic *efx, unsigned int *impl_out,
unsigned int *enabled_out);
int efx_mcdi_get_privilege_mask(struct efx_nic *efx, u32 *mask);
#ifdef CONFIG_SFC_MCDI_MON
int efx_mcdi_mon_probe(struct efx_nic *efx);