[dpdk-dev] [PATCH v4 14/20] common/sfc_efx/base: add counter stream MCDI wrappers

[Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>]

From: Igor Romanov <igor.romanov@oktetlabs.ru>

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>
---
 drivers/common/sfc_efx/base/efx.h     |  32 ++++++
 drivers/common/sfc_efx/base/efx_mae.c | 138 ++++++++++++++++++++++++++
 drivers/common/sfc_efx/version.map    |   3 +
 3 files changed, 173 insertions(+)

diff --git a/drivers/common/sfc_efx/base/efx.h b/drivers/common/sfc_efx/base/efx.h
index b789e19b98..a5d40c2e3d 100644
--- a/drivers/common/sfc_efx/base/efx.h
+++ b/drivers/common/sfc_efx/base/efx.h
@@ -4437,6 +4437,38 @@ 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 cf6c449a16..1f313c8127 100644
--- a/drivers/common/sfc_efx/base/efx_mae.c
+++ b/drivers/common/sfc_efx/base/efx_mae.c
@@ -2535,6 +2535,144 @@ efx_mae_counters_free(
 	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 d60cd477fa..7f69d6bb0d 100644
--- 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;
-- 
2.30.2