[PATCH v7 net-next 06/15] net: enetc: add support for the "Update" operation to buffer pool table

[Wei Fang <wei.fang@nxp.com>]

The buffer pool table contains buffer pool configuration and operational
information. Each entry corresponds to a buffer pool. The Entry ID value
represents the buffer pool ID to access.

The buffer pool table is a static bounded index table, buffer pools are
always present and enabled. It only supports Update and Query operations,
This patch only adds ntmp_bpt_update_entry() helper to support updating
the specified entry of the buffer pool table. Query action to the table
will be added in the future.

Signed-off-by: Wei Fang <wei.fang@nxp.com>
---
 drivers/net/ethernet/freescale/enetc/ntmp.c   | 43 +++++++++++++++++++
 .../ethernet/freescale/enetc/ntmp_private.h   |  6 +++
 include/linux/fsl/ntmp.h                      | 26 +++++++++++
 3 files changed, 75 insertions(+)

diff --git a/drivers/net/ethernet/freescale/enetc/ntmp.c b/drivers/net/ethernet/freescale/enetc/ntmp.c
index db74a9107975..ad89be85b185 100644
--- a/drivers/net/ethernet/freescale/enetc/ntmp.c
+++ b/drivers/net/ethernet/freescale/enetc/ntmp.c
@@ -23,11 +23,15 @@
 #define NTMP_RSST_ID			3
 #define NTMP_FDBT_ID			15
 #define NTMP_VFT_ID			18
+#define NTMP_BPT_ID			41
 
 /* Generic Update Actions for most tables */
 #define NTMP_GEN_UA_CFGEU		BIT(0)
 #define NTMP_GEN_UA_STSEU		BIT(1)
 
+/* Specific Update Actions for some tables */
+#define BPT_UA_BPSEU			BIT(1)
+
 /* Query Action: 0: Full query. 1: Query entry ID, the fields after entry
  * ID are not returned.
  */
@@ -271,6 +275,8 @@ static const char *ntmp_table_name(int tbl_id)
 		return "FDB Table";
 	case NTMP_VFT_ID:
 		return "VLAN Filter Table";
+	case NTMP_BPT_ID:
+		return "Buffer Pool Table";
 	default:
 		return "Unknown Table";
 	}
@@ -749,5 +755,42 @@ int ntmp_vft_add_entry(struct ntmp_user *user, u16 vid,
 }
 EXPORT_SYMBOL_GPL(ntmp_vft_add_entry);
 
+int ntmp_bpt_update_entry(struct ntmp_user *user, u32 entry_id,
+			  const struct bpt_cfge_data *cfge)
+{
+	struct bpt_req_update *req;
+	struct netc_swcbd swcbd;
+	struct netc_cbdr *cbdr;
+	union netc_cbd cbd;
+	int err;
+
+	swcbd.size = sizeof(*req);
+	err = ntmp_alloc_data_mem(user->dev, &swcbd, (void **)&req);
+	if (err)
+		return err;
+
+	/* Note that BPT_UA_BPSEU is used to update the BPSE_DATA of the entry,
+	 * which is maintained by the hardware. The BPSE_DATA is not present in
+	 * the request data for 'Update' operation.
+	 */
+	ntmp_fill_crd_eid(&req->rbe, user->tbl.bpt_ver, 0,
+			  NTMP_GEN_UA_CFGEU | BPT_UA_BPSEU, entry_id);
+	req->cfge = *cfge;
+	ntmp_fill_request_hdr(&cbd, swcbd.dma, NTMP_LEN(swcbd.size, 0),
+			      NTMP_BPT_ID, NTMP_CMD_UPDATE, NTMP_AM_ENTRY_ID);
+
+	ntmp_select_and_lock_cbdr(user, &cbdr);
+	err = netc_xmit_ntmp_cmd(cbdr, &cbd, &swcbd);
+	if (err)
+		dev_err(user->dev,
+			"Failed to update %s entry 0x%x, err: %pe\n",
+			ntmp_table_name(NTMP_BPT_ID), entry_id, ERR_PTR(err));
+
+	ntmp_unlock_cbdr(cbdr);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(ntmp_bpt_update_entry);
+
 MODULE_DESCRIPTION("NXP NETC Library");
 MODULE_LICENSE("Dual BSD/GPL");
diff --git a/drivers/net/ethernet/freescale/enetc/ntmp_private.h b/drivers/net/ethernet/freescale/enetc/ntmp_private.h
index 575ee783be47..64df49e9a3ef 100644
--- a/drivers/net/ethernet/freescale/enetc/ntmp_private.h
+++ b/drivers/net/ethernet/freescale/enetc/ntmp_private.h
@@ -175,4 +175,10 @@ struct vft_req_ua {
 	struct vft_cfge_data cfge;
 };
 
+/* Buffer Pool Table Request Data Buffer Format of Update action */
+struct bpt_req_update {
+	struct ntmp_req_by_eid rbe;
+	struct bpt_cfge_data cfge;
+};
+
 #endif
diff --git a/include/linux/fsl/ntmp.h b/include/linux/fsl/ntmp.h
index 3672e0dc7726..d74714a402f6 100644
--- a/include/linux/fsl/ntmp.h
+++ b/include/linux/fsl/ntmp.h
@@ -33,6 +33,7 @@ struct netc_tbl_vers {
 	u8 rsst_ver;
 	u8 fdbt_ver;
 	u8 vft_ver;
+	u8 bpt_ver;
 };
 
 struct netc_swcbd {
@@ -123,6 +124,29 @@ struct vft_cfge_data {
 	__le32 et_eid;
 };
 
+struct bpt_bpse_data {
+	__le32 amount_used;
+	__le32 amount_used_hwm;
+	u8 bpd_fc_state;
+#define BPT_FC_STATE		BIT(0)
+#define BPT_BPD			BIT(1)
+} __packed;
+
+struct bpt_cfge_data {
+	u8 fccfg_sbpen;
+#define BPT_SBP_EN		BIT(0)
+#define BPT_FC_CFG		GENMASK(2, 1)
+#define BPT_FC_CFG_EN_BPFC	1
+	u8 pfc_vector;
+	__le16 max_thresh;
+	__le16 fc_on_thresh;
+	__le16 fc_off_thresh;
+	__le16 sbp_thresh;
+	__le16 resv;
+	__le32 sbp_eid;
+	__le32 fc_ports;
+};
+
 #if IS_ENABLED(CONFIG_NXP_NETC_LIB)
 int ntmp_init_cbdr(struct netc_cbdr *cbdr, struct device *dev,
 		   const struct netc_cbdr_regs *regs);
@@ -149,6 +173,8 @@ int ntmp_fdbt_search_port_entry(struct ntmp_user *user, int port,
 				struct fdbt_entry_data *entry);
 int ntmp_vft_add_entry(struct ntmp_user *user, u16 vid,
 		       const struct vft_cfge_data *cfge);
+int ntmp_bpt_update_entry(struct ntmp_user *user, u32 entry_id,
+			  const struct bpt_cfge_data *cfge);
 #else
 static inline int ntmp_init_cbdr(struct netc_cbdr *cbdr, struct device *dev,
 				 const struct netc_cbdr_regs *regs)
-- 
2.34.1