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net/sfc/base: retrieve number of MAC stats from NIC

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This reports the number of stats (and hence the DMA buffer size)
for MAC stats. If MC_GET_CAPABABILITIES_V4 is not supported then
use the legacy Siena-compatible MC_CMD_MAC_NSTATS value.

Signed-off-by: Andy Moreton <amoreton@solarflare.com>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
This commit is contained in:
Andy Moreton 2018-02-20 07:33:55 +00:00 committed by Ferruh Yigit
parent 4aab7f07a6
commit 96cab03ded
3 changed files with 16 additions and 2 deletions
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14
drivers/net/sfc/base/ef10_nic.c
View File

@ -996,7 +996,7 @@ ef10_get_datapath_caps(
efx_nic_cfg_t *encp = &(enp->en_nic_cfg);
efx_mcdi_req_t req;
uint8_t payload[MAX(MC_CMD_GET_CAPABILITIES_IN_LEN,
MC_CMD_GET_CAPABILITIES_V2_OUT_LEN)];
MC_CMD_GET_CAPABILITIES_V4_OUT_LEN)];
efx_rc_t rc;
if ((rc = ef10_mcdi_get_pf_count(enp, &encp->enc_hw_pf_count)) != 0)
@ -1008,7 +1008,7 @@ ef10_get_datapath_caps(
req.emr_in_buf = payload;
req.emr_in_length = MC_CMD_GET_CAPABILITIES_IN_LEN;
req.emr_out_buf = payload;
req.emr_out_length = MC_CMD_GET_CAPABILITIES_V2_OUT_LEN;
req.emr_out_length = MC_CMD_GET_CAPABILITIES_V4_OUT_LEN;
efx_mcdi_execute_quiet(enp, &req);
@ -1175,6 +1175,16 @@ ef10_get_datapath_caps(
encp->enc_tunnel_config_udp_entries_max = 0;
}
/* Check if firmware supports extended MAC stats. */
if (req.emr_out_length_used >= MC_CMD_GET_CAPABILITIES_V4_OUT_LEN) {
/* Extended stats buffer supported */
encp->enc_mac_stats_nstats = MCDI_OUT_WORD(req,
GET_CAPABILITIES_V4_OUT_MAC_STATS_NUM_STATS);
} else {
/* Use Siena-compatible legacy MAC stats */
encp->enc_mac_stats_nstats = MC_CMD_MAC_NSTATS;
}
#undef CAP_FLAGS1
#undef CAP_FLAGS2

2
drivers/net/sfc/base/efx.h
View File

@ -1232,6 +1232,8 @@ typedef struct efx_nic_cfg_s {
uint32_t enc_max_pcie_link_gen;
/* Firmware verifies integrity of NVRAM updates */
uint32_t enc_nvram_update_verify_result_supported;
/* Firmware support for extended MAC_STATS buffer */
uint32_t enc_mac_stats_nstats;
} efx_nic_cfg_t;
#define EFX_PCI_FUNCTION_IS_PF(_encp) ((_encp)->enc_vf == 0xffff)

2
drivers/net/sfc/base/siena_nic.c
View File

@ -156,6 +156,8 @@ siena_board_cfg(
encp->enc_nvram_update_verify_result_supported = B_FALSE;
encp->enc_mac_stats_nstats = MC_CMD_MAC_NSTATS;
return (0);
fail2: