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sfxge(4): 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.

Submitted by:   Andy Moreton <amoreton at solarflare.com>
Sponsored by:   Solarflare Communications, Inc.
Differential Revision:  https://reviews.freebsd.org/D18173
This commit is contained in:
Andrew Rybchenko 2018-11-27 14:14:57 +00:00
parent 016941e371
commit 807145d9f6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=341059
3 changed files with 16 additions and 2 deletions
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14
sys/dev/sfxge/common/ef10_nic.c
View File

@ -1023,7 +1023,7 @@ 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)
@ -1035,7 +1035,7 @@ 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);
@ -1202,6 +1202,16 @@ 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
sys/dev/sfxge/common/efx.h
View File

@ -1260,6 +1260,8 @@ 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
sys/dev/sfxge/common/siena_nic.c
View File

@ -185,6 +185,8 @@ siena_board_cfg(
encp->enc_nvram_update_verify_result_supported = B_FALSE;
encp->enc_mac_stats_nstats = MC_CMD_MAC_NSTATS;
return (0);
fail2: