diff options
author | Edward Cree <ecree@solarflare.com> | 2020-06-30 13:02:56 +0100 |
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committer | David S. Miller <davem@davemloft.net> | 2020-06-30 13:09:09 -0700 |
commit | 272e53aa5c1648bdb1a11831d4ce96c17d69d99a (patch) | |
tree | 409a18967e876ac72f438e39b652ddc98d4d9950 /drivers/net/ethernet/sfc/mcdi_port_common.c | |
parent | sfc: move NIC-specific mcdi_port declarations out of common header (diff) | |
download | linux-dev-272e53aa5c1648bdb1a11831d4ce96c17d69d99a.tar.xz linux-dev-272e53aa5c1648bdb1a11831d4ce96c17d69d99a.zip |
sfc: commonise MCDI MAC stats handling
Most of it was already declared in mcdi_port_common.h, so just move the
implementations to mcdi_port_common.c.
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/sfc/mcdi_port_common.c')
-rw-r--r-- | drivers/net/ethernet/sfc/mcdi_port_common.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/net/ethernet/sfc/mcdi_port_common.c b/drivers/net/ethernet/sfc/mcdi_port_common.c index a6a072ba46d3..e0608d0d961b 100644 --- a/drivers/net/ethernet/sfc/mcdi_port_common.c +++ b/drivers/net/ethernet/sfc/mcdi_port_common.c @@ -10,6 +10,7 @@ #include "mcdi_port_common.h" #include "efx_common.h" +#include "nic.h" int efx_mcdi_get_phy_cfg(struct efx_nic *efx, struct efx_mcdi_phy_data *cfg) { @@ -520,6 +521,110 @@ int efx_mcdi_set_mac(struct efx_nic *efx) NULL, 0, NULL); } +enum efx_stats_action { + EFX_STATS_ENABLE, + EFX_STATS_DISABLE, + EFX_STATS_PULL, +}; + +static int efx_mcdi_mac_stats(struct efx_nic *efx, + enum efx_stats_action action, int clear) +{ + MCDI_DECLARE_BUF(inbuf, MC_CMD_MAC_STATS_IN_LEN); + int rc; + int change = action == EFX_STATS_PULL ? 0 : 1; + int enable = action == EFX_STATS_ENABLE ? 1 : 0; + int period = action == EFX_STATS_ENABLE ? 1000 : 0; + dma_addr_t dma_addr = efx->stats_buffer.dma_addr; + u32 dma_len = action != EFX_STATS_DISABLE ? + efx->num_mac_stats * sizeof(u64) : 0; + + BUILD_BUG_ON(MC_CMD_MAC_STATS_OUT_DMA_LEN != 0); + + MCDI_SET_QWORD(inbuf, MAC_STATS_IN_DMA_ADDR, dma_addr); + MCDI_POPULATE_DWORD_7(inbuf, MAC_STATS_IN_CMD, + MAC_STATS_IN_DMA, !!enable, + MAC_STATS_IN_CLEAR, clear, + MAC_STATS_IN_PERIODIC_CHANGE, change, + MAC_STATS_IN_PERIODIC_ENABLE, enable, + MAC_STATS_IN_PERIODIC_CLEAR, 0, + MAC_STATS_IN_PERIODIC_NOEVENT, 1, + MAC_STATS_IN_PERIOD_MS, period); + MCDI_SET_DWORD(inbuf, MAC_STATS_IN_DMA_LEN, dma_len); + + if (efx_nic_rev(efx) >= EFX_REV_HUNT_A0) + MCDI_SET_DWORD(inbuf, MAC_STATS_IN_PORT_ID, efx->vport_id); + + rc = efx_mcdi_rpc_quiet(efx, MC_CMD_MAC_STATS, inbuf, sizeof(inbuf), + NULL, 0, NULL); + /* Expect ENOENT if DMA queues have not been set up */ + if (rc && (rc != -ENOENT || atomic_read(&efx->active_queues))) + efx_mcdi_display_error(efx, MC_CMD_MAC_STATS, sizeof(inbuf), + NULL, 0, rc); + return rc; +} + +void efx_mcdi_mac_start_stats(struct efx_nic *efx) +{ + __le64 *dma_stats = efx->stats_buffer.addr; + + dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID; + + efx_mcdi_mac_stats(efx, EFX_STATS_ENABLE, 0); +} + +void efx_mcdi_mac_stop_stats(struct efx_nic *efx) +{ + efx_mcdi_mac_stats(efx, EFX_STATS_DISABLE, 0); +} + +#define EFX_MAC_STATS_WAIT_US 100 +#define EFX_MAC_STATS_WAIT_ATTEMPTS 10 + +void efx_mcdi_mac_pull_stats(struct efx_nic *efx) +{ + __le64 *dma_stats = efx->stats_buffer.addr; + int attempts = EFX_MAC_STATS_WAIT_ATTEMPTS; + + dma_stats[efx->num_mac_stats - 1] = EFX_MC_STATS_GENERATION_INVALID; + efx_mcdi_mac_stats(efx, EFX_STATS_PULL, 0); + + while (dma_stats[efx->num_mac_stats - 1] == + EFX_MC_STATS_GENERATION_INVALID && + attempts-- != 0) + udelay(EFX_MAC_STATS_WAIT_US); +} + +int efx_mcdi_mac_init_stats(struct efx_nic *efx) +{ + int rc; + + if (!efx->num_mac_stats) + return 0; + + /* Allocate buffer for stats */ + rc = efx_nic_alloc_buffer(efx, &efx->stats_buffer, + efx->num_mac_stats * sizeof(u64), GFP_KERNEL); + if (rc) { + netif_warn(efx, probe, efx->net_dev, + "failed to allocate DMA buffer: %d\n", rc); + return rc; + } + + netif_dbg(efx, probe, efx->net_dev, + "stats buffer at %llx (virt %p phys %llx)\n", + (u64) efx->stats_buffer.dma_addr, + efx->stats_buffer.addr, + (u64) virt_to_phys(efx->stats_buffer.addr)); + + return 0; +} + +void efx_mcdi_mac_fini_stats(struct efx_nic *efx) +{ + efx_nic_free_buffer(efx, &efx->stats_buffer); +} + /* Get physical port number (EF10 only; on Siena it is same as PF number) */ int efx_mcdi_port_get_number(struct efx_nic *efx) { |