common/sfc_efx/base: add counter stream MCDI wrappers

The MCDIs will be used to control counter Rx queue packet flow.

Signed-off-by: Igor Romanov <igor.romanov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
Reviewed-by: Ivan Malov <ivan.malov@oktetlabs.ru>

diff --git a/drivers/common/sfc_efx/base/efx.h b/drivers/common/sfc_efx/base/efx.h
index d0f8bc1..cc173d1 100644 (file)
--- a/drivers/common/sfc_efx/base/efx.h
+++ b/drivers/common/sfc_efx/base/efx.h
@@ -4455,6 +4455,38 @@ efx_mae_counters_free(
        __in_ecount(n_counters)         const efx_counter_t *countersp,
        __out_opt                       uint32_t *gen_countp);
 
+/* When set, include counters with a value of zero */
+#define        EFX_MAE_COUNTERS_STREAM_IN_ZERO_SQUASH_DISABLE  (1U << 0)
+
+/*
+ * Set if credit-based flow control is used. In this case the driver
+ * must call efx_mae_counters_stream_give_credits() to notify the
+ * packetiser of descriptors written.
+ */
+#define        EFX_MAE_COUNTERS_STREAM_OUT_USES_CREDITS        (1U << 0)
+
+LIBEFX_API
+extern __checkReturn                   efx_rc_t
+efx_mae_counters_stream_start(
+       __in                            efx_nic_t *enp,
+       __in                            uint16_t rxq_id,
+       __in                            uint16_t packet_size,
+       __in                            uint32_t flags_in,
+       __out                           uint32_t *flags_out);
+
+LIBEFX_API
+extern __checkReturn                   efx_rc_t
+efx_mae_counters_stream_stop(
+       __in                            efx_nic_t *enp,
+       __in                            uint16_t rxq_id,
+       __out_opt                       uint32_t *gen_countp);
+
+LIBEFX_API
+extern __checkReturn                   efx_rc_t
+efx_mae_counters_stream_give_credits(
+       __in                            efx_nic_t *enp,
+       __in                            uint32_t n_credits);
+
 LIBEFX_API
 extern __checkReturn                   efx_rc_t
 efx_mae_action_set_free(

diff --git a/drivers/common/sfc_efx/base/efx_mae.c b/drivers/common/sfc_efx/base/efx_mae.c
index 8f9f9f4..6481a4e 100644 (file)
--- a/drivers/common/sfc_efx/base/efx_mae.c
+++ b/drivers/common/sfc_efx/base/efx_mae.c
@@ -2551,6 +2551,144 @@ fail2:
        EFSYS_PROBE(fail2);
 fail1:
        EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+       return (rc);
+}
+
+       __checkReturn                   efx_rc_t
+efx_mae_counters_stream_start(
+       __in                            efx_nic_t *enp,
+       __in                            uint16_t rxq_id,
+       __in                            uint16_t packet_size,
+       __in                            uint32_t flags_in,
+       __out                           uint32_t *flags_out)
+{
+       efx_mcdi_req_t req;
+       EFX_MCDI_DECLARE_BUF(payload, MC_CMD_MAE_COUNTERS_STREAM_START_IN_LEN,
+                            MC_CMD_MAE_COUNTERS_STREAM_START_OUT_LEN);
+       efx_rc_t rc;
+
+       EFX_STATIC_ASSERT(EFX_MAE_COUNTERS_STREAM_IN_ZERO_SQUASH_DISABLE ==
+           1U << MC_CMD_MAE_COUNTERS_STREAM_START_IN_ZERO_SQUASH_DISABLE_LBN);
+
+       EFX_STATIC_ASSERT(EFX_MAE_COUNTERS_STREAM_OUT_USES_CREDITS ==
+           1U << MC_CMD_MAE_COUNTERS_STREAM_START_OUT_USES_CREDITS_LBN);
+
+       req.emr_cmd = MC_CMD_MAE_COUNTERS_STREAM_START;
+       req.emr_in_buf = payload;
+       req.emr_in_length = MC_CMD_MAE_COUNTERS_STREAM_START_IN_LEN;
+       req.emr_out_buf = payload;
+       req.emr_out_length = MC_CMD_MAE_COUNTERS_STREAM_START_OUT_LEN;
+
+       MCDI_IN_SET_WORD(req, MAE_COUNTERS_STREAM_START_IN_QID, rxq_id);
+       MCDI_IN_SET_WORD(req, MAE_COUNTERS_STREAM_START_IN_PACKET_SIZE,
+                        packet_size);
+       MCDI_IN_SET_DWORD(req, MAE_COUNTERS_STREAM_START_IN_FLAGS, flags_in);
+
+       efx_mcdi_execute(enp, &req);
+
+       if (req.emr_rc != 0) {
+               rc = req.emr_rc;
+               goto fail1;
+       }
+
+       if (req.emr_out_length_used <
+           MC_CMD_MAE_COUNTERS_STREAM_START_OUT_LEN) {
+               rc = EMSGSIZE;
+               goto fail2;
+       }
+
+       *flags_out = MCDI_OUT_DWORD(req, MAE_COUNTERS_STREAM_START_OUT_FLAGS);
+
+       return (0);
+
+fail2:
+       EFSYS_PROBE(fail2);
+fail1:
+       EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+       return (rc);
+}
+
+       __checkReturn                   efx_rc_t
+efx_mae_counters_stream_stop(
+       __in                            efx_nic_t *enp,
+       __in                            uint16_t rxq_id,
+       __out_opt                       uint32_t *gen_countp)
+{
+       efx_mcdi_req_t req;
+       EFX_MCDI_DECLARE_BUF(payload, MC_CMD_MAE_COUNTERS_STREAM_STOP_IN_LEN,
+                            MC_CMD_MAE_COUNTERS_STREAM_STOP_OUT_LEN);
+       efx_rc_t rc;
+
+       req.emr_cmd = MC_CMD_MAE_COUNTERS_STREAM_STOP;
+       req.emr_in_buf = payload;
+       req.emr_in_length = MC_CMD_MAE_COUNTERS_STREAM_STOP_IN_LEN;
+       req.emr_out_buf = payload;
+       req.emr_out_length = MC_CMD_MAE_COUNTERS_STREAM_STOP_OUT_LEN;
+
+       MCDI_IN_SET_WORD(req, MAE_COUNTERS_STREAM_STOP_IN_QID, rxq_id);
+
+       efx_mcdi_execute(enp, &req);
+
+       if (req.emr_rc != 0) {
+               rc = req.emr_rc;
+               goto fail1;
+       }
+
+       if (req.emr_out_length_used <
+           MC_CMD_MAE_COUNTERS_STREAM_STOP_OUT_LEN) {
+               rc = EMSGSIZE;
+               goto fail2;
+       }
+
+       if (gen_countp != NULL) {
+               *gen_countp = MCDI_OUT_DWORD(req,
+                           MAE_COUNTERS_STREAM_STOP_OUT_GENERATION_COUNT);
+       }
+
+       return (0);
+
+fail2:
+       EFSYS_PROBE(fail2);
+fail1:
+       EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
+       return (rc);
+}
+
+       __checkReturn                   efx_rc_t
+efx_mae_counters_stream_give_credits(
+       __in                            efx_nic_t *enp,
+       __in                            uint32_t n_credits)
+{
+       efx_mcdi_req_t req;
+       EFX_MCDI_DECLARE_BUF(payload,
+                            MC_CMD_MAE_COUNTERS_STREAM_GIVE_CREDITS_IN_LEN,
+                            MC_CMD_MAE_COUNTERS_STREAM_GIVE_CREDITS_OUT_LEN);
+       efx_rc_t rc;
+
+       req.emr_cmd = MC_CMD_MAE_COUNTERS_STREAM_GIVE_CREDITS;
+       req.emr_in_buf = payload;
+       req.emr_in_length = MC_CMD_MAE_COUNTERS_STREAM_GIVE_CREDITS_IN_LEN;
+       req.emr_out_buf = payload;
+       req.emr_out_length = MC_CMD_MAE_COUNTERS_STREAM_GIVE_CREDITS_OUT_LEN;
+
+       MCDI_IN_SET_DWORD(req, MAE_COUNTERS_STREAM_GIVE_CREDITS_IN_NUM_CREDITS,
+                        n_credits);
+
+       efx_mcdi_execute(enp, &req);
+
+       if (req.emr_rc != 0) {
+               rc = req.emr_rc;
+               goto fail1;
+       }
+
+       return (0);
+
+fail1:
+       EFSYS_PROBE1(fail1, efx_rc_t, rc);
+
        return (rc);
 }
 

diff --git a/drivers/common/sfc_efx/version.map b/drivers/common/sfc_efx/version.map
index 30b243a..622f5d4 100644 (file)
--- a/drivers/common/sfc_efx/version.map
+++ b/drivers/common/sfc_efx/version.map
@@ -104,6 +104,9 @@ INTERNAL {
        efx_mae_action_set_specs_equal;
        efx_mae_counters_alloc;
        efx_mae_counters_free;
+       efx_mae_counters_stream_give_credits;
+       efx_mae_counters_stream_start;
+       efx_mae_counters_stream_stop;
        efx_mae_encap_header_alloc;
        efx_mae_encap_header_free;
        efx_mae_fini;