[PATCH v4 net-next 06/14] net: enetc: add support for the "Update" operation to buffer pool table

Wei Fang
2026-03-31T11:29:41Z

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 | 39 +++++++++++++++++++
.../ethernet/freescale/enetc/ntmp_private.h | 6 +++
include/linux/fsl/ntmp.h | 32 +++++++++++++++
3 files changed, 77 insertions(+)

diff --git a/drivers/net/ethernet/freescale/enetc/ntmp.c b/drivers/net/ethernet/freescale/enetc/ntmp.c
index d7d8a37078d1..3c59b355c142 100644
--- a/drivers/net/ethernet/freescale/enetc/ntmp.c
+++ b/drivers/net/ethernet/freescale/enetc/ntmp.c
@@ -22,11 +22,15 @@
#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: Only query entry ID */
#define NTMP_QA_ENTRY_ID 1

@@ -234,6 +238,8 @@ 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";
}
@@ -702,5 +708,38 @@ 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 ntmp_dma_buf data = {
+ .dev = user->dev,
+ .size = sizeof(struct bpt_req_update),
+ };
+ struct bpt_req_update *req;
+ union netc_cbd cbd;
+ int err;
+
+ err = ntmp_alloc_data_mem(&data, (void **)&req);
+ if (err)
+ return err;
+
+ 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, data.dma, NTMP_LEN(data.size, 0),
+ NTMP_BPT_ID, NTMP_CMD_UPDATE, NTMP_AM_ENTRY_ID);
+
+ err = netc_xmit_ntmp_cmd(user, &cbd);
+ 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_free_data_mem(&data);
+
+ 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 d2a6399b0a36..7d50af7745c7 100644
--- a/drivers/net/ethernet/freescale/enetc/ntmp_private.h
+++ b/drivers/net/ethernet/freescale/enetc/ntmp_private.h
@@ -179,4 +179,10 @@ 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 2aedea17307f..a54945dcdc61 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_cbdr {
@@ -116,6 +117,29 @@ 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);
@@ -142,6 +166,8 @@ 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)
@@ -213,6 +239,12 @@ static inline int ntmp_vft_add_entry(struct ntmp_user *user, u16 vid,
return 0;
}

+static inline int ntmp_bpt_update_entry(struct ntmp_user *user, u32 entry_id,
+ const struct bpt_cfge_data *cfge)
+{
+ return 0;
+}
+
#endif

#endif
--
2.34.1