[dpdk-dev] [PATCH 1/4] common/cnxk: support reading BPHY CGX/RPM FEC

[Tomasz Duszynski <tduszynski@marvell.com>]

Before setting FEC for specific LMAC one needs to know which type is
actually supported because it generally differs between modes
LMAC operates in (SGMII, SFI, etc.).

Signed-off-by: Tomasz Duszynski <tduszynski@marvell.com>
---
 drivers/common/cnxk/roc_bphy_cgx.c      | 25 +++++++++++++++++++++++++
 drivers/common/cnxk/roc_bphy_cgx.h      |  3 +++
 drivers/common/cnxk/roc_bphy_cgx_priv.h |  4 ++++
 drivers/common/cnxk/version.map         |  1 +
 4 files changed, 33 insertions(+)

diff --git a/drivers/common/cnxk/roc_bphy_cgx.c b/drivers/common/cnxk/roc_bphy_cgx.c
index 056a3db47f..467b67686b 100644
--- a/drivers/common/cnxk/roc_bphy_cgx.c
+++ b/drivers/common/cnxk/roc_bphy_cgx.c
@@ -395,3 +395,28 @@ roc_bphy_cgx_ptp_rx_disable(struct roc_bphy_cgx *roc_cgx, unsigned int lmac)
 {
 	return roc_bphy_cgx_ptp_rx_ena_dis(roc_cgx, lmac, false);
 }
+
+int
+roc_bphy_cgx_fec_supported_get(struct roc_bphy_cgx *roc_cgx, unsigned int lmac,
+			       enum roc_bphy_cgx_eth_link_fec *fec)
+{
+	uint64_t scr1, scr0;
+	int ret;
+
+	if (!roc_cgx || !fec)
+		return -EINVAL;
+
+	if (!roc_bphy_cgx_lmac_exists(roc_cgx, lmac))
+		return -EINVAL;
+
+	scr1 = FIELD_PREP(SCR1_ETH_CMD_ID, ETH_CMD_GET_SUPPORTED_FEC);
+
+	ret = roc_bphy_cgx_intf_req(roc_cgx, lmac, scr1, &scr0);
+	if (ret)
+		return ret;
+
+	scr0 = FIELD_GET(SCR0_ETH_FEC_TYPES_S_FEC, scr0);
+	*fec = (enum roc_bphy_cgx_eth_link_fec)scr0;
+
+	return 0;
+}
diff --git a/drivers/common/cnxk/roc_bphy_cgx.h b/drivers/common/cnxk/roc_bphy_cgx.h
index 49c35a1e63..9439f88b34 100644
--- a/drivers/common/cnxk/roc_bphy_cgx.h
+++ b/drivers/common/cnxk/roc_bphy_cgx.h
@@ -115,6 +115,9 @@ __roc_api int roc_bphy_cgx_ptp_rx_enable(struct roc_bphy_cgx *roc_cgx,
 					 unsigned int lmac);
 __roc_api int roc_bphy_cgx_ptp_rx_disable(struct roc_bphy_cgx *roc_cgx,
 					  unsigned int lmac);
+__roc_api int roc_bphy_cgx_fec_supported_get(struct roc_bphy_cgx *roc_cgx,
+					     unsigned int lmac,
+					     enum roc_bphy_cgx_eth_link_fec *fec);
 
 
 #endif /* _ROC_BPHY_CGX_H_ */
diff --git a/drivers/common/cnxk/roc_bphy_cgx_priv.h b/drivers/common/cnxk/roc_bphy_cgx_priv.h
index 71a277fffd..93aa43ef5a 100644
--- a/drivers/common/cnxk/roc_bphy_cgx_priv.h
+++ b/drivers/common/cnxk/roc_bphy_cgx_priv.h
@@ -66,6 +66,7 @@ enum eth_cmd_id {
 	ETH_CMD_INTERNAL_LBK = 7,
 	ETH_CMD_MODE_CHANGE = 11, /* hot plug support */
 	ETH_CMD_INTF_SHUTDOWN = 12,
+	ETH_CMD_GET_SUPPORTED_FEC = 18,
 	ETH_CMD_SET_PTP_MODE = 34,
 };
 
@@ -109,6 +110,9 @@ enum eth_cmd_own {
 #define SCR0_ETH_LNK_STS_S_LMAC_TYPE   GENMASK_ULL(35, 28)
 #define SCR0_ETH_LNK_STS_S_MODE	       GENMASK_ULL(43, 36)
 
+/* struct eth_fec_types_s */
+#define SCR0_ETH_FEC_TYPES_S_FEC GENMASK_ULL(10, 9)
+
 /* scratchx(1) CSR used for non-secure SW->ATF communication
  * This CSR acts as a command register
  */
diff --git a/drivers/common/cnxk/version.map b/drivers/common/cnxk/version.map
index e3af48c02e..3b9b283b6e 100644
--- a/drivers/common/cnxk/version.map
+++ b/drivers/common/cnxk/version.map
@@ -24,6 +24,7 @@ INTERNAL {
 	roc_ae_fpm_put;
 	roc_bphy_cgx_dev_fini;
 	roc_bphy_cgx_dev_init;
+	roc_bphy_cgx_fec_supported_get;
 	roc_bphy_cgx_get_linkinfo;
 	roc_bphy_cgx_intlbk_disable;
 	roc_bphy_cgx_intlbk_enable;
-- 
2.25.1