From: Ivan Malov <ivan.malov@oktetlabs.ru>
Date: Tue, 20 Oct 2020 09:12:46 +0000 (+0100)
Subject: common/sfc_efx/base: add MAE limit query API
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=d761ec9f335e5a1d6951100d8cbd93359494f44d;p=dpdk.git

common/sfc_efx/base: add MAE limit query API

Add an API for client drivers to query the engine limits.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
---

diff --git a/drivers/common/sfc_efx/base/efx.h b/drivers/common/sfc_efx/base/efx.h
index f109c8e332..db66be0faf 100644
--- a/drivers/common/sfc_efx/base/efx.h
+++ b/drivers/common/sfc_efx/base/efx.h
@@ -4048,6 +4048,16 @@ extern					void
 efx_mae_fini(
 	__in				efx_nic_t *enp);
 
+typedef struct efx_mae_limits_s {
+	uint32_t			eml_max_n_action_prios;
+} efx_mae_limits_t;
+
+LIBEFX_API
+extern	__checkReturn			efx_rc_t
+efx_mae_get_limits(
+	__in				efx_nic_t *enp,
+	__out				efx_mae_limits_t *emlp);
+
 #endif /* EFSYS_OPT_MAE */
 
 #ifdef	__cplusplus
diff --git a/drivers/common/sfc_efx/base/efx_impl.h b/drivers/common/sfc_efx/base/efx_impl.h
index 8e72796acf..6e9329c203 100644
--- a/drivers/common/sfc_efx/base/efx_impl.h
+++ b/drivers/common/sfc_efx/base/efx_impl.h
@@ -783,6 +783,7 @@ typedef struct efx_proxy_ops_s {
 #if EFSYS_OPT_MAE
 
 typedef struct efx_mae_s {
+	uint32_t			em_max_n_action_prios;
 } efx_mae_t;
 
 #endif /* EFSYS_OPT_MAE */
diff --git a/drivers/common/sfc_efx/base/efx_mae.c b/drivers/common/sfc_efx/base/efx_mae.c
index 0de9ccb2e0..c93342de15 100644
--- a/drivers/common/sfc_efx/base/efx_mae.c
+++ b/drivers/common/sfc_efx/base/efx_mae.c
@@ -10,6 +10,47 @@
 
 #if EFSYS_OPT_MAE
 
+static	__checkReturn			efx_rc_t
+efx_mae_get_capabilities(
+	__in				efx_nic_t *enp)
+{
+	efx_mcdi_req_t req;
+	EFX_MCDI_DECLARE_BUF(payload,
+	    MC_CMD_MAE_GET_CAPS_IN_LEN,
+	    MC_CMD_MAE_GET_CAPS_OUT_LEN);
+	struct efx_mae_s *maep = enp->en_maep;
+	efx_rc_t rc;
+
+	req.emr_cmd = MC_CMD_MAE_GET_CAPS;
+	req.emr_in_buf = payload;
+	req.emr_in_length = MC_CMD_MAE_GET_CAPS_IN_LEN;
+	req.emr_out_buf = payload;
+	req.emr_out_length = MC_CMD_MAE_GET_CAPS_OUT_LEN;
+
+	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_GET_CAPS_OUT_LEN) {
+		rc = EMSGSIZE;
+		goto fail2;
+	}
+
+	maep->em_max_n_action_prios =
+	    MCDI_OUT_DWORD(req, MAE_GET_CAPS_OUT_ACTION_PRIOS);
+
+	return (0);
+
+fail2:
+	EFSYS_PROBE(fail2);
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+	return (rc);
+}
+
 	__checkReturn			efx_rc_t
 efx_mae_init(
 	__in				efx_nic_t *enp)
@@ -31,8 +72,16 @@ efx_mae_init(
 
 	enp->en_maep = maep;
 
+	rc = efx_mae_get_capabilities(enp);
+	if (rc != 0)
+		goto fail3;
+
 	return (0);
 
+fail3:
+	EFSYS_PROBE(fail3);
+	EFSYS_KMEM_FREE(enp->en_esip, sizeof (struct efx_mae_s), enp->en_maep);
+	enp->en_maep = NULL;
 fail2:
 	EFSYS_PROBE(fail2);
 fail1:
@@ -54,4 +103,27 @@ efx_mae_fini(
 	enp->en_maep = NULL;
 }
 
+	__checkReturn			efx_rc_t
+efx_mae_get_limits(
+	__in				efx_nic_t *enp,
+	__out				efx_mae_limits_t *emlp)
+{
+	const efx_nic_cfg_t *encp = efx_nic_cfg_get(enp);
+	struct efx_mae_s *maep = enp->en_maep;
+	efx_rc_t rc;
+
+	if (encp->enc_mae_supported == B_FALSE) {
+		rc = ENOTSUP;
+		goto fail1;
+	}
+
+	emlp->eml_max_n_action_prios = maep->em_max_n_action_prios;
+
+	return (0);
+
+fail1:
+	EFSYS_PROBE1(fail1, efx_rc_t, rc);
+	return (rc);
+}
+
 #endif /* EFSYS_OPT_MAE */
diff --git a/drivers/common/sfc_efx/version.map b/drivers/common/sfc_efx/version.map
index c76dfe1e45..4b500b646a 100644
--- a/drivers/common/sfc_efx/version.map
+++ b/drivers/common/sfc_efx/version.map
@@ -86,6 +86,7 @@ INTERNAL {
 	efx_mac_up;
 
 	efx_mae_fini;
+	efx_mae_get_limits;
 	efx_mae_init;
 
 	efx_mcdi_fini;