1 files changed, 324 insertions, 0 deletions

diff --git a/drivers/net/ethernet/huawei/hinic/hinic_debugfs.c b/drivers/net/ethernet/huawei/hinic/hinic_debugfs.c
new file mode 100644
index 000000000..061952c6c
--- /dev/null
+++ b/drivers/net/ethernet/huawei/hinic/hinic_debugfs.c
@@ -0,0 +1,324 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Huawei HiNIC PCI Express Linux driver
+ * Copyright(c) 2017 Huawei Technologies Co., Ltd
+ */
+
+#include <linux/debugfs.h>
+#include <linux/device.h>
+
+#include "hinic_debugfs.h"
+
+static struct dentry *hinic_dbgfs_root;
+
+enum sq_dbg_info {
+	GLB_SQ_ID,
+	SQ_PI,
+	SQ_CI,
+	SQ_FI,
+	SQ_MSIX_ENTRY,
+};
+
+static char *sq_fields[] = {"glb_sq_id", "sq_pi", "sq_ci", "sq_fi", "sq_msix_entry"};
+
+static u64 hinic_dbg_get_sq_info(struct hinic_dev *nic_dev, struct hinic_sq *sq, int idx)
+{
+	struct hinic_wq *wq = sq->wq;
+
+	switch (idx) {
+	case GLB_SQ_ID:
+		return nic_dev->hwdev->func_to_io.global_qpn + sq->qid;
+	case SQ_PI:
+		return atomic_read(&wq->prod_idx) & wq->mask;
+	case SQ_CI:
+		return atomic_read(&wq->cons_idx) & wq->mask;
+	case SQ_FI:
+		return be16_to_cpu(*(__be16 *)(sq->hw_ci_addr)) & wq->mask;
+	case SQ_MSIX_ENTRY:
+		return sq->msix_entry;
+	}
+
+	return 0;
+}
+
+enum rq_dbg_info {
+	GLB_RQ_ID,
+	RQ_HW_PI,
+	RQ_SW_CI,
+	RQ_SW_PI,
+	RQ_MSIX_ENTRY,
+};
+
+static char *rq_fields[] = {"glb_rq_id", "rq_hw_pi", "rq_sw_ci", "rq_sw_pi", "rq_msix_entry"};
+
+static u64 hinic_dbg_get_rq_info(struct hinic_dev *nic_dev, struct hinic_rq *rq, int idx)
+{
+	struct hinic_wq *wq = rq->wq;
+
+	switch (idx) {
+	case GLB_RQ_ID:
+		return nic_dev->hwdev->func_to_io.global_qpn + rq->qid;
+	case RQ_HW_PI:
+		return be16_to_cpu(*(__be16 *)(rq->pi_virt_addr)) & wq->mask;
+	case RQ_SW_CI:
+		return atomic_read(&wq->cons_idx) & wq->mask;
+	case RQ_SW_PI:
+		return atomic_read(&wq->prod_idx) & wq->mask;
+	case RQ_MSIX_ENTRY:
+		return rq->msix_entry;
+	}
+
+	return 0;
+}
+
+enum func_tbl_info {
+	VALID,
+	RX_MODE,
+	MTU,
+	RQ_DEPTH,
+	QUEUE_NUM,
+};
+
+static char *func_table_fields[] = {"valid", "rx_mode", "mtu", "rq_depth", "cfg_q_num"};
+
+static int hinic_dbg_get_func_table(struct hinic_dev *nic_dev, int idx)
+{
+	struct tag_sml_funcfg_tbl *funcfg_table_elem;
+	struct hinic_cmd_lt_rd *read_data;
+	u16 out_size = sizeof(*read_data);
+	int ret = ~0;
+	int err;
+
+	read_data = kzalloc(sizeof(*read_data), GFP_KERNEL);
+	if (!read_data)
+		return ~0;
+
+	read_data->node = TBL_ID_FUNC_CFG_SM_NODE;
+	read_data->inst = TBL_ID_FUNC_CFG_SM_INST;
+	read_data->entry_size = HINIC_FUNCTION_CONFIGURE_TABLE_SIZE;
+	read_data->lt_index = HINIC_HWIF_FUNC_IDX(nic_dev->hwdev->hwif);
+	read_data->len = HINIC_FUNCTION_CONFIGURE_TABLE_SIZE;
+
+	err = hinic_port_msg_cmd(nic_dev->hwdev, HINIC_PORT_CMD_RD_LINE_TBL, read_data,
+				 sizeof(*read_data), read_data, &out_size);
+	if (err || out_size != sizeof(*read_data) || read_data->status) {
+		netif_err(nic_dev, drv, nic_dev->netdev,
+			  "Failed to get func table, err: %d, status: 0x%x, out size: 0x%x\n",
+			  err, read_data->status, out_size);
+		kfree(read_data);
+		return ~0;
+	}
+
+	funcfg_table_elem = (struct tag_sml_funcfg_tbl *)read_data->data;
+
+	switch (idx) {
+	case VALID:
+		ret = funcfg_table_elem->dw0.bs.valid;
+		break;
+	case RX_MODE:
+		ret = funcfg_table_elem->dw0.bs.nic_rx_mode;
+		break;
+	case MTU:
+		ret = funcfg_table_elem->dw1.bs.mtu;
+		break;
+	case RQ_DEPTH:
+		ret = funcfg_table_elem->dw13.bs.cfg_rq_depth;
+		break;
+	case QUEUE_NUM:
+		ret = funcfg_table_elem->dw13.bs.cfg_q_num;
+		break;
+	}
+
+	kfree(read_data);
+
+	return ret;
+}
+
+static ssize_t hinic_dbg_cmd_read(struct file *filp, char __user *buffer, size_t count,
+				  loff_t *ppos)
+{
+	struct hinic_debug_priv *dbg;
+	char ret_buf[20];
+	int *desc;
+	u64 out;
+	int ret;
+
+	desc = filp->private_data;
+	dbg = container_of(desc, struct hinic_debug_priv, field_id[*desc]);
+
+	switch (dbg->type) {
+	case HINIC_DBG_SQ_INFO:
+		out = hinic_dbg_get_sq_info(dbg->dev, dbg->object, *desc);
+		break;
+
+	case HINIC_DBG_RQ_INFO:
+		out = hinic_dbg_get_rq_info(dbg->dev, dbg->object, *desc);
+		break;
+
+	case HINIC_DBG_FUNC_TABLE:
+		out = hinic_dbg_get_func_table(dbg->dev, *desc);
+		break;
+
+	default:
+		netif_warn(dbg->dev, drv, dbg->dev->netdev, "Invalid hinic debug cmd: %d\n",
+			   dbg->type);
+		return -EINVAL;
+	}
+
+	ret = snprintf(ret_buf, sizeof(ret_buf), "0x%llx\n", out);
+
+	return simple_read_from_buffer(buffer, count, ppos, ret_buf, ret);
+}
+
+static const struct file_operations hinic_dbg_cmd_fops = {
+	.owner = THIS_MODULE,
+	.open  = simple_open,
+	.read  = hinic_dbg_cmd_read,
+};
+
+static int create_dbg_files(struct hinic_dev *dev, enum hinic_dbg_type type, void *data,
+			    struct dentry *root, struct hinic_debug_priv **dbg, char **field,
+			    int nfile)
+{
+	struct hinic_debug_priv *tmp;
+	int i;
+
+	tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
+	if (!tmp)
+		return -ENOMEM;
+
+	tmp->dev = dev;
+	tmp->object = data;
+	tmp->type = type;
+	tmp->root = root;
+
+	for (i = 0; i < nfile; i++) {
+		tmp->field_id[i] = i;
+		debugfs_create_file(field[i], 0400, root, &tmp->field_id[i], &hinic_dbg_cmd_fops);
+	}
+
+	*dbg = tmp;
+
+	return 0;
+}
+
+static void rem_dbg_files(struct hinic_debug_priv *dbg)
+{
+	if (dbg->type != HINIC_DBG_FUNC_TABLE)
+		debugfs_remove_recursive(dbg->root);
+
+	kfree(dbg);
+}
+
+int hinic_sq_debug_add(struct hinic_dev *dev, u16 sq_id)
+{
+	struct hinic_sq *sq;
+	struct dentry *root;
+	char sub_dir[16];
+
+	sq = dev->txqs[sq_id].sq;
+
+	sprintf(sub_dir, "0x%x", sq_id);
+
+	root = debugfs_create_dir(sub_dir, dev->sq_dbgfs);
+
+	return create_dbg_files(dev, HINIC_DBG_SQ_INFO, sq, root, &sq->dbg, sq_fields,
+				ARRAY_SIZE(sq_fields));
+}
+
+void hinic_sq_debug_rem(struct hinic_sq *sq)
+{
+	if (sq->dbg)
+		rem_dbg_files(sq->dbg);
+}
+
+int hinic_rq_debug_add(struct hinic_dev *dev, u16 rq_id)
+{
+	struct hinic_rq *rq;
+	struct dentry *root;
+	char sub_dir[16];
+
+	rq = dev->rxqs[rq_id].rq;
+
+	sprintf(sub_dir, "0x%x", rq_id);
+
+	root = debugfs_create_dir(sub_dir, dev->rq_dbgfs);
+
+	return create_dbg_files(dev, HINIC_DBG_RQ_INFO, rq, root, &rq->dbg, rq_fields,
+				ARRAY_SIZE(rq_fields));
+}
+
+void hinic_rq_debug_rem(struct hinic_rq *rq)
+{
+	if (rq->dbg)
+		rem_dbg_files(rq->dbg);
+}
+
+int hinic_func_table_debug_add(struct hinic_dev *dev)
+{
+	if (HINIC_IS_VF(dev->hwdev->hwif))
+		return 0;
+
+	return create_dbg_files(dev, HINIC_DBG_FUNC_TABLE, dev, dev->func_tbl_dbgfs, &dev->dbg,
+				func_table_fields, ARRAY_SIZE(func_table_fields));
+}
+
+void hinic_func_table_debug_rem(struct hinic_dev *dev)
+{
+	if (!HINIC_IS_VF(dev->hwdev->hwif) && dev->dbg)
+		rem_dbg_files(dev->dbg);
+}
+
+void hinic_sq_dbgfs_init(struct hinic_dev *nic_dev)
+{
+	nic_dev->sq_dbgfs = debugfs_create_dir("SQs", nic_dev->dbgfs_root);
+}
+
+void hinic_sq_dbgfs_uninit(struct hinic_dev *nic_dev)
+{
+	debugfs_remove_recursive(nic_dev->sq_dbgfs);
+}
+
+void hinic_rq_dbgfs_init(struct hinic_dev *nic_dev)
+{
+	nic_dev->rq_dbgfs = debugfs_create_dir("RQs", nic_dev->dbgfs_root);
+}
+
+void hinic_rq_dbgfs_uninit(struct hinic_dev *nic_dev)
+{
+	debugfs_remove_recursive(nic_dev->rq_dbgfs);
+}
+
+void hinic_func_tbl_dbgfs_init(struct hinic_dev *nic_dev)
+{
+	if (!HINIC_IS_VF(nic_dev->hwdev->hwif))
+		nic_dev->func_tbl_dbgfs = debugfs_create_dir("func_table", nic_dev->dbgfs_root);
+}
+
+void hinic_func_tbl_dbgfs_uninit(struct hinic_dev *nic_dev)
+{
+	if (!HINIC_IS_VF(nic_dev->hwdev->hwif))
+		debugfs_remove_recursive(nic_dev->func_tbl_dbgfs);
+}
+
+void hinic_dbg_init(struct hinic_dev *nic_dev)
+{
+	nic_dev->dbgfs_root = debugfs_create_dir(pci_name(nic_dev->hwdev->hwif->pdev),
+						 hinic_dbgfs_root);
+}
+
+void hinic_dbg_uninit(struct hinic_dev *nic_dev)
+{
+	debugfs_remove_recursive(nic_dev->dbgfs_root);
+	nic_dev->dbgfs_root = NULL;
+}
+
+void hinic_dbg_register_debugfs(const char *debugfs_dir_name)
+{
+	hinic_dbgfs_root = debugfs_create_dir(debugfs_dir_name, NULL);
+}
+
+void hinic_dbg_unregister_debugfs(void)
+{
+	debugfs_remove_recursive(hinic_dbgfs_root);
+	hinic_dbgfs_root = NULL;
+}