1 files changed, 620 insertions, 62 deletions

diff --git a/drivers/soc/hisilicon/kunpeng_hccs.c b/drivers/soc/hisilicon/kunpeng_hccs.c
index f3810d9d1caa..006fec47ea10 100644
--- a/drivers/soc/hisilicon/kunpeng_hccs.c
+++ b/drivers/soc/hisilicon/kunpeng_hccs.c
@@ -21,20 +21,27 @@
  *    - if all enabled ports are in linked
  *    - if all linked ports are in full lane
  *    - CRC error count sum
+ *
+ * - Retrieve all HCCS types used on the platform.
+ *
+ * - Support low power feature for all specified HCCS type ports, and
+ *   provide the following interface:
+ *    - query HCCS types supported increasing and decreasing lane number.
+ *    - decrease lane number of all specified HCCS type ports on idle state.
+ *    - increase lane number of all specified HCCS type ports.
  */
 #include <linux/acpi.h>
+#include <linux/delay.h>
 #include <linux/iopoll.h>
 #include <linux/platform_device.h>
+#include <linux/stringify.h>
 #include <linux/sysfs.h>
+#include <linux/types.h>
 
 #include <acpi/pcc.h>
 
 #include "kunpeng_hccs.h"
 
-/* PCC defines */
-#define HCCS_PCC_SIGNATURE_MASK		0x50434300
-#define HCCS_PCC_STATUS_CMD_COMPLETE	BIT(0)
-
 /*
  * Arbitrary retries in case the remote processor is slow to respond
  * to PCC commands
@@ -57,6 +64,42 @@ static struct hccs_chip_info *kobj_to_chip_info(struct kobject *k)
 	return container_of(k, struct hccs_chip_info, kobj);
 }
 
+static struct hccs_dev *device_kobj_to_hccs_dev(struct kobject *k)
+{
+	struct device *dev = container_of(k, struct device, kobj);
+	struct platform_device *pdev =
+			container_of(dev, struct platform_device, dev);
+
+	return platform_get_drvdata(pdev);
+}
+
+static char *hccs_port_type_to_name(struct hccs_dev *hdev, u8 type)
+{
+	u16 i;
+
+	for (i = 0; i < hdev->used_type_num; i++) {
+		if (hdev->type_name_maps[i].type == type)
+			return hdev->type_name_maps[i].name;
+	}
+
+	return NULL;
+}
+
+static int hccs_name_to_port_type(struct hccs_dev *hdev,
+				  const char *name, u8 *type)
+{
+	u16 i;
+
+	for (i = 0; i < hdev->used_type_num; i++) {
+		if (strcmp(hdev->type_name_maps[i].name, name) == 0) {
+			*type = hdev->type_name_maps[i].type;
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
 struct hccs_register_ctx {
 	struct device *dev;
 	u8 chan_id;
@@ -89,8 +132,10 @@ static int hccs_get_pcc_chan_id(struct hccs_dev *hdev)
 	struct hccs_register_ctx ctx = {0};
 	acpi_status status;
 
-	if (!acpi_has_method(handle, METHOD_NAME__CRS))
+	if (!acpi_has_method(handle, METHOD_NAME__CRS)) {
+		dev_err(hdev->dev, "No _CRS method.\n");
 		return -ENODEV;
+	}
 
 	ctx.dev = hdev->dev;
 	status = acpi_walk_resources(handle, METHOD_NAME__CRS,
@@ -112,12 +157,16 @@ static void hccs_chan_tx_done(struct mbox_client *cl, void *msg, int ret)
 			 *(u8 *)msg, ret);
 }
 
-static void hccs_unregister_pcc_channel(struct hccs_dev *hdev)
+static void hccs_pcc_rx_callback(struct mbox_client *cl, void *mssg)
 {
-	struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
+	struct hccs_mbox_client_info *cl_info =
+			container_of(cl, struct hccs_mbox_client_info, client);
+
+	complete(&cl_info->done);
+}
 
-	if (cl_info->pcc_comm_addr)
-		iounmap(cl_info->pcc_comm_addr);
+static void hccs_unregister_pcc_channel(struct hccs_dev *hdev)
+{
 	pcc_mbox_free_channel(hdev->cl_info.pcc_chan);
 }
 
@@ -126,6 +175,7 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev)
 	struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
 	struct mbox_client *cl = &cl_info->client;
 	struct pcc_mbox_chan *pcc_chan;
+	struct mbox_chan *mbox_chan;
 	struct device *dev = hdev->dev;
 	int rc;
 
@@ -133,14 +183,17 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev)
 	cl->tx_block = false;
 	cl->knows_txdone = true;
 	cl->tx_done = hccs_chan_tx_done;
+	cl->rx_callback = hdev->verspec_data->rx_callback;
+	init_completion(&cl_info->done);
+
 	pcc_chan = pcc_mbox_request_channel(cl, hdev->chan_id);
 	if (IS_ERR(pcc_chan)) {
-		dev_err(dev, "PPC channel request failed.\n");
+		dev_err(dev, "PCC channel request failed.\n");
 		rc = -ENODEV;
 		goto out;
 	}
 	cl_info->pcc_chan = pcc_chan;
-	cl_info->mbox_chan = pcc_chan->mchan;
+	mbox_chan = pcc_chan->mchan;
 
 	/*
 	 * pcc_chan->latency is just a nominal value. In reality the remote
@@ -149,21 +202,23 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev)
 	 */
 	cl_info->deadline_us =
 			HCCS_PCC_CMD_WAIT_RETRIES_NUM * pcc_chan->latency;
-	if (cl_info->mbox_chan->mbox->txdone_irq) {
+	if (!hdev->verspec_data->has_txdone_irq &&
+	    mbox_chan->mbox->txdone_irq) {
 		dev_err(dev, "PCC IRQ in PCCT is enabled.\n");
 		rc = -EINVAL;
 		goto err_mbx_channel_free;
+	} else if (hdev->verspec_data->has_txdone_irq &&
+		   !mbox_chan->mbox->txdone_irq) {
+		dev_err(dev, "PCC IRQ in PCCT isn't supported.\n");
+		rc = -EINVAL;
+		goto err_mbx_channel_free;
 	}
 
-	if (pcc_chan->shmem_base_addr) {
-		cl_info->pcc_comm_addr = ioremap(pcc_chan->shmem_base_addr,
-						 pcc_chan->shmem_size);
-		if (!cl_info->pcc_comm_addr) {
-			dev_err(dev, "Failed to ioremap PCC communication region for channel-%d.\n",
-				hdev->chan_id);
-			rc = -ENOMEM;
-			goto err_mbx_channel_free;
-		}
+	if (pcc_chan->shmem_size != HCCS_PCC_SHARE_MEM_BYTES) {
+		dev_err(dev, "Base size (%llu) of PCC communication region must be %d bytes.\n",
+			pcc_chan->shmem_size, HCCS_PCC_SHARE_MEM_BYTES);
+		rc = -EINVAL;
+		goto err_mbx_channel_free;
 	}
 
 	return 0;
@@ -174,11 +229,11 @@ out:
 	return rc;
 }
 
-static int hccs_check_chan_cmd_complete(struct hccs_dev *hdev)
+static int hccs_wait_cmd_complete_by_poll(struct hccs_dev *hdev)
 {
 	struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
 	struct acpi_pcct_shared_memory __iomem *comm_base =
-							cl_info->pcc_comm_addr;
+							cl_info->pcc_chan->shmem;
 	u16 status;
 	int ret;
 
@@ -187,7 +242,7 @@ static int hccs_check_chan_cmd_complete(struct hccs_dev *hdev)
 	 * deadline_us(timeout_us) until PCC command complete bit is set(cond)
 	 */
 	ret = readw_poll_timeout(&comm_base->status, status,
-				 status & HCCS_PCC_STATUS_CMD_COMPLETE,
+				 status & PCC_STATUS_CMD_COMPLETE,
 				 HCCS_POLL_STATUS_TIME_INTERVAL_US,
 				 cl_info->deadline_us);
 	if (unlikely(ret))
@@ -196,46 +251,90 @@ static int hccs_check_chan_cmd_complete(struct hccs_dev *hdev)
 	return ret;
 }
 
+static int hccs_wait_cmd_complete_by_irq(struct hccs_dev *hdev)
+{
+	struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
+
+	if (!wait_for_completion_timeout(&cl_info->done,
+			usecs_to_jiffies(cl_info->deadline_us))) {
+		dev_err(hdev->dev, "PCC command executed timeout!\n");
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static inline void hccs_fill_pcc_shared_mem_region(struct hccs_dev *hdev,
+						   u8 cmd,
+						   struct hccs_desc *desc,
+						   void __iomem *comm_space,
+						   u16 space_size)
+{
+	struct acpi_pcct_shared_memory tmp = {
+		.signature = PCC_SIGNATURE | hdev->chan_id,
+		.command = cmd,
+		.status = 0,
+	};
+
+	memcpy_toio(hdev->cl_info.pcc_chan->shmem, (void *)&tmp,
+		    sizeof(struct acpi_pcct_shared_memory));
+
+	/* Copy the message to the PCC comm space */
+	memcpy_toio(comm_space, (void *)desc, space_size);
+}
+
+static inline void hccs_fill_ext_pcc_shared_mem_region(struct hccs_dev *hdev,
+						       u8 cmd,
+						       struct hccs_desc *desc,
+						       void __iomem *comm_space,
+						       u16 space_size)
+{
+	struct acpi_pcct_ext_pcc_shared_memory tmp = {
+		.signature = PCC_SIGNATURE | hdev->chan_id,
+		.flags = PCC_CMD_COMPLETION_NOTIFY,
+		.length = HCCS_PCC_SHARE_MEM_BYTES,
+		.command = cmd,
+	};
+
+	memcpy_toio(hdev->cl_info.pcc_chan->shmem, (void *)&tmp,
+		    sizeof(struct acpi_pcct_ext_pcc_shared_memory));
+
+	/* Copy the message to the PCC comm space */
+	memcpy_toio(comm_space, (void *)desc, space_size);
+}
+
 static int hccs_pcc_cmd_send(struct hccs_dev *hdev, u8 cmd,
 			     struct hccs_desc *desc)
 {
+	const struct hccs_verspecific_data *verspec_data = hdev->verspec_data;
 	struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
-	void __iomem *comm_space = cl_info->pcc_comm_addr +
-					sizeof(struct acpi_pcct_shared_memory);
+	struct mbox_chan *mbox_chan = cl_info->pcc_chan->mchan;
 	struct hccs_fw_inner_head *fw_inner_head;
-	struct acpi_pcct_shared_memory tmp = {0};
-	u16 comm_space_size;
+	void __iomem *comm_space;
+	u16 space_size;
 	int ret;
 
-	/* Write signature for this subspace */
-	tmp.signature = HCCS_PCC_SIGNATURE_MASK | hdev->chan_id;
-	/* Write to the shared command region */
-	tmp.command = cmd;
-	/* Clear cmd complete bit */
-	tmp.status = 0;
-	memcpy_toio(cl_info->pcc_comm_addr, (void *)&tmp,
-			sizeof(struct acpi_pcct_shared_memory));
-
-	/* Copy the message to the PCC comm space */
-	comm_space_size = HCCS_PCC_SHARE_MEM_BYTES -
-				sizeof(struct acpi_pcct_shared_memory);
-	memcpy_toio(comm_space, (void *)desc, comm_space_size);
+	comm_space = cl_info->pcc_chan->shmem + verspec_data->shared_mem_size;
+	space_size = HCCS_PCC_SHARE_MEM_BYTES - verspec_data->shared_mem_size;
+	verspec_data->fill_pcc_shared_mem(hdev, cmd, desc,
+					  comm_space, space_size);
+	if (verspec_data->has_txdone_irq)
+		reinit_completion(&cl_info->done);
 
 	/* Ring doorbell */
-	ret = mbox_send_message(cl_info->mbox_chan, &cmd);
+	ret = mbox_send_message(mbox_chan, &cmd);
 	if (ret < 0) {
 		dev_err(hdev->dev, "Send PCC mbox message failed, ret = %d.\n",
 			ret);
 		goto end;
 	}
 
-	/* Wait for completion */
-	ret = hccs_check_chan_cmd_complete(hdev);
+	ret = verspec_data->wait_cmd_complete(hdev);
 	if (ret)
 		goto end;
 
 	/* Copy response data */
-	memcpy_fromio((void *)desc, comm_space, comm_space_size);
+	memcpy_fromio((void *)desc, comm_space, space_size);
 	fw_inner_head = &desc->rsp.fw_inner_head;
 	if (fw_inner_head->retStatus) {
 		dev_err(hdev->dev, "Execute PCC command failed, error code = %u.\n",
@@ -244,7 +343,10 @@ static int hccs_pcc_cmd_send(struct hccs_dev *hdev, u8 cmd,
 	}
 
 end:
-	mbox_client_txdone(cl_info->mbox_chan, ret);
+	if (verspec_data->has_txdone_irq)
+		mbox_chan_txdone(mbox_chan, ret);
+	else
+		mbox_client_txdone(mbox_chan, ret);
 	return ret;
 }
 
@@ -390,6 +492,7 @@ static int hccs_query_all_die_info_on_platform(struct hccs_dev *hdev)
 	struct device *dev = hdev->dev;
 	struct hccs_chip_info *chip;
 	struct hccs_die_info *die;
+	bool has_die_info = false;
 	u8 i, j;
 	int ret;
 
@@ -398,6 +501,7 @@ static int hccs_query_all_die_info_on_platform(struct hccs_dev *hdev)
 		if (!chip->die_num)
 			continue;
 
+		has_die_info = true;
 		chip->dies = devm_kzalloc(hdev->dev,
 				chip->die_num * sizeof(struct hccs_die_info),
 				GFP_KERNEL);
@@ -419,7 +523,7 @@ static int hccs_query_all_die_info_on_platform(struct hccs_dev *hdev)
 		}
 	}
 
-	return 0;
+	return has_die_info ? 0 : -EINVAL;
 }
 
 static int hccs_get_bd_info(struct hccs_dev *hdev, u8 opcode,
@@ -495,6 +599,12 @@ static int hccs_get_all_port_attr(struct hccs_dev *hdev,
 		start_id = rsp_head.next_id;
 	}
 
+	if (left_buf_len != 0) {
+		dev_err(hdev->dev, "failed to get the expected port number(%u) attribute.\n",
+			size);
+		return -EINVAL;
+	}
+
 	return 0;
 }
 
@@ -519,7 +629,7 @@ static int hccs_get_all_port_info_on_die(struct hccs_dev *hdev,
 		port = &die->ports[i];
 		port->port_id = attrs[i].port_id;
 		port->port_type = attrs[i].port_type;
-		port->lane_mode = attrs[i].lane_mode;
+		port->max_lane_num = attrs[i].max_lane_num;
 		port->enable = attrs[i].enable;
 		port->die = die;
 	}
@@ -531,10 +641,10 @@ out:
 
 static int hccs_query_all_port_info_on_platform(struct hccs_dev *hdev)
 {
-
 	struct device *dev = hdev->dev;
 	struct hccs_chip_info *chip;
 	struct hccs_die_info *die;
+	bool has_port_info = false;
 	u8 i, j;
 	int ret;
 
@@ -545,6 +655,7 @@ static int hccs_query_all_port_info_on_platform(struct hccs_dev *hdev)
 			if (!die->port_num)
 				continue;
 
+			has_port_info = true;
 			die->ports = devm_kzalloc(dev,
 				die->port_num * sizeof(struct hccs_port_info),
 				GFP_KERNEL);
@@ -563,7 +674,7 @@ static int hccs_query_all_port_info_on_platform(struct hccs_dev *hdev)
 		}
 	}
 
-	return 0;
+	return has_port_info ? 0 : -EINVAL;
 }
 
 static int hccs_get_hw_info(struct hccs_dev *hdev)
@@ -594,6 +705,55 @@ static int hccs_get_hw_info(struct hccs_dev *hdev)
 	return 0;
 }
 
+static u16 hccs_calc_used_type_num(struct hccs_dev *hdev,
+				   unsigned long *hccs_ver)
+{
+	struct hccs_chip_info *chip;
+	struct hccs_port_info *port;
+	struct hccs_die_info *die;
+	u16 used_type_num = 0;
+	u16 i, j, k;
+
+	for (i = 0; i < hdev->chip_num; i++) {
+		chip = &hdev->chips[i];
+		for (j = 0; j < chip->die_num; j++) {
+			die = &chip->dies[j];
+			for (k = 0; k < die->port_num; k++) {
+				port = &die->ports[k];
+				set_bit(port->port_type, hccs_ver);
+			}
+		}
+	}
+
+	for_each_set_bit(i, hccs_ver, HCCS_IP_MAX + 1)
+		used_type_num++;
+
+	return used_type_num;
+}
+
+static int hccs_init_type_name_maps(struct hccs_dev *hdev)
+{
+	DECLARE_BITMAP(hccs_ver, HCCS_IP_MAX + 1) = {};
+	unsigned int i;
+	u16 idx = 0;
+
+	hdev->used_type_num = hccs_calc_used_type_num(hdev, hccs_ver);
+	hdev->type_name_maps = devm_kcalloc(hdev->dev, hdev->used_type_num,
+					    sizeof(struct hccs_type_name_map),
+					    GFP_KERNEL);
+	if (!hdev->type_name_maps)
+		return -ENOMEM;
+
+	for_each_set_bit(i, hccs_ver, HCCS_IP_MAX + 1) {
+		hdev->type_name_maps[idx].type = i;
+		sprintf(hdev->type_name_maps[idx].name,
+			"%s%u", HCCS_IP_PREFIX, i);
+		idx++;
+	}
+
+	return 0;
+}
+
 static int hccs_query_port_link_status(struct hccs_dev *hdev,
 				       const struct hccs_port_info *port,
 				       struct hccs_link_status *link_status)
@@ -754,7 +914,7 @@ static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr,
 {
 	const struct hccs_port_info *port = kobj_to_port_info(kobj);
 
-	return sysfs_emit(buf, "HCCS-v%u\n", port->port_type);
+	return sysfs_emit(buf, "%s%u\n", HCCS_IP_PREFIX, port->port_type);
 }
 static struct kobj_attribute hccs_type_attr = __ATTR_RO(type);
 
@@ -763,7 +923,7 @@ static ssize_t lane_mode_show(struct kobject *kobj, struct kobj_attribute *attr,
 {
 	const struct hccs_port_info *port = kobj_to_port_info(kobj);
 
-	return sysfs_emit(buf, "x%u\n", port->lane_mode);
+	return sysfs_emit(buf, "x%u\n", port->max_lane_num);
 }
 static struct kobj_attribute lane_mode_attr = __ATTR_RO(lane_mode);
 
@@ -1058,6 +1218,372 @@ static const struct kobj_type hccs_chip_type = {
 	.default_groups = hccs_chip_default_groups,
 };
 
+static int hccs_parse_pm_port_type(struct hccs_dev *hdev, const char *buf,
+				   u8 *port_type)
+{
+	char hccs_name[HCCS_NAME_MAX_LEN + 1] = "";
+	u8 type;
+	int ret;
+
+	ret = sscanf(buf, "%" __stringify(HCCS_NAME_MAX_LEN) "s", hccs_name);
+	if (ret != 1)
+		return -EINVAL;
+
+	ret = hccs_name_to_port_type(hdev, hccs_name, &type);
+	if (ret) {
+		dev_dbg(hdev->dev, "input invalid, please get the available types from 'used_types'.\n");
+		return ret;
+	}
+
+	if (type == HCCS_V2 && hdev->caps & HCCS_CAPS_HCCS_V2_PM) {
+		*port_type = type;
+		return 0;
+	}
+
+	dev_dbg(hdev->dev, "%s doesn't support for increasing and decreasing lane.\n",
+		hccs_name);
+
+	return -EOPNOTSUPP;
+}
+
+static int hccs_query_port_idle_status(struct hccs_dev *hdev,
+				       struct hccs_port_info *port, u8 *idle)
+{
+	const struct hccs_die_info *die = port->die;
+	const struct hccs_chip_info *chip = die->chip;
+	struct hccs_port_comm_req_param *req_param;
+	struct hccs_desc desc;
+	int ret;
+
+	hccs_init_req_desc(&desc);
+	req_param = (struct hccs_port_comm_req_param *)desc.req.data;
+	req_param->chip_id = chip->chip_id;
+	req_param->die_id = die->die_id;
+	req_param->port_id = port->port_id;
+	ret = hccs_pcc_cmd_send(hdev, HCCS_GET_PORT_IDLE_STATUS, &desc);
+	if (ret) {
+		dev_err(hdev->dev,
+			"get port idle status failed, ret = %d.\n", ret);
+		return ret;
+	}
+
+	*idle = *((u8 *)desc.rsp.data);
+	return 0;
+}
+
+static int hccs_get_all_spec_port_idle_sta(struct hccs_dev *hdev, u8 port_type,
+					   bool *all_idle)
+{
+	struct hccs_chip_info *chip;
+	struct hccs_port_info *port;
+	struct hccs_die_info *die;
+	int ret = 0;
+	u8 i, j, k;
+	u8 idle;
+
+	*all_idle = false;
+	for (i = 0; i < hdev->chip_num; i++) {
+		chip = &hdev->chips[i];
+		for (j = 0; j < chip->die_num; j++) {
+			die = &chip->dies[j];
+			for (k = 0; k < die->port_num; k++) {
+				port = &die->ports[k];
+				if (port->port_type != port_type)
+					continue;
+				ret = hccs_query_port_idle_status(hdev, port,
+								  &idle);
+				if (ret) {
+					dev_err(hdev->dev,
+						"hccs%u on chip%u/die%u get idle status failed, ret = %d.\n",
+						port->port_id, chip->chip_id, die->die_id, ret);
+					return ret;
+				} else if (idle == 0) {
+					dev_info(hdev->dev, "hccs%u on chip%u/die%u is busy.\n",
+						 port->port_id, chip->chip_id, die->die_id);
+					return 0;
+				}
+			}
+		}
+	}
+	*all_idle = true;
+
+	return 0;
+}
+
+static int hccs_get_all_spec_port_full_lane_sta(struct hccs_dev *hdev,
+						u8 port_type, bool *full_lane)
+{
+	struct hccs_link_status status = {0};
+	struct hccs_chip_info *chip;
+	struct hccs_port_info *port;
+	struct hccs_die_info *die;
+	u8 i, j, k;
+	int ret;
+
+	*full_lane = false;
+	for (i = 0; i < hdev->chip_num; i++) {
+		chip = &hdev->chips[i];
+		for (j = 0; j < chip->die_num; j++) {
+			die = &chip->dies[j];
+			for (k = 0; k < die->port_num; k++) {
+				port = &die->ports[k];
+				if (port->port_type != port_type)
+					continue;
+				ret = hccs_query_port_link_status(hdev, port,
+								  &status);
+				if (ret)
+					return ret;
+				if (status.lane_num != port->max_lane_num)
+					return 0;
+			}
+		}
+	}
+	*full_lane = true;
+
+	return 0;
+}
+
+static int hccs_prepare_inc_lane(struct hccs_dev *hdev, u8 type)
+{
+	struct hccs_inc_lane_req_param *req_param;
+	struct hccs_desc desc;
+	int ret;
+
+	hccs_init_req_desc(&desc);
+	req_param = (struct hccs_inc_lane_req_param *)desc.req.data;
+	req_param->port_type = type;
+	req_param->opt_type = HCCS_PREPARE_INC_LANE;
+	ret = hccs_pcc_cmd_send(hdev, HCCS_PM_INC_LANE, &desc);
+	if (ret)
+		dev_err(hdev->dev, "prepare for increasing lane failed, ret = %d.\n",
+			ret);
+
+	return ret;
+}
+
+static int hccs_wait_serdes_adapt_completed(struct hccs_dev *hdev, u8 type)
+{
+#define HCCS_MAX_WAIT_CNT_FOR_ADAPT	10
+#define HCCS_QUERY_ADAPT_RES_DELAY_MS	100
+#define HCCS_SERDES_ADAPT_OK		0
+
+	struct hccs_inc_lane_req_param *req_param;
+	u8 wait_cnt = HCCS_MAX_WAIT_CNT_FOR_ADAPT;
+	struct hccs_desc desc;
+	u8 adapt_res;
+	int ret;
+
+	do {
+		hccs_init_req_desc(&desc);
+		req_param = (struct hccs_inc_lane_req_param *)desc.req.data;
+		req_param->port_type = type;
+		req_param->opt_type = HCCS_GET_ADAPT_RES;
+		ret = hccs_pcc_cmd_send(hdev, HCCS_PM_INC_LANE, &desc);
+		if (ret) {
+			dev_err(hdev->dev, "query adapting result failed, ret = %d.\n",
+				ret);
+			return ret;
+		}
+		adapt_res = *((u8 *)&desc.rsp.data);
+		if (adapt_res == HCCS_SERDES_ADAPT_OK)
+			return 0;
+
+		msleep(HCCS_QUERY_ADAPT_RES_DELAY_MS);
+	} while (--wait_cnt);
+
+	dev_err(hdev->dev, "wait for adapting completed timeout.\n");
+
+	return -ETIMEDOUT;
+}
+
+static int hccs_start_hpcs_retraining(struct hccs_dev *hdev, u8 type)
+{
+	struct hccs_inc_lane_req_param *req_param;
+	struct hccs_desc desc;
+	int ret;
+
+	hccs_init_req_desc(&desc);
+	req_param = (struct hccs_inc_lane_req_param *)desc.req.data;
+	req_param->port_type = type;
+	req_param->opt_type = HCCS_START_RETRAINING;
+	ret = hccs_pcc_cmd_send(hdev, HCCS_PM_INC_LANE, &desc);
+	if (ret)
+		dev_err(hdev->dev, "start hpcs retraining failed, ret = %d.\n",
+			ret);
+
+	return ret;
+}
+
+static int hccs_start_inc_lane(struct hccs_dev *hdev, u8 type)
+{
+	int ret;
+
+	ret = hccs_prepare_inc_lane(hdev, type);
+	if (ret)
+		return ret;
+
+	ret = hccs_wait_serdes_adapt_completed(hdev, type);
+	if (ret)
+		return ret;
+
+	return hccs_start_hpcs_retraining(hdev, type);
+}
+
+static int hccs_start_dec_lane(struct hccs_dev *hdev, u8 type)
+{
+	struct hccs_desc desc;
+	u8 *port_type;
+	int ret;
+
+	hccs_init_req_desc(&desc);
+	port_type = (u8 *)desc.req.data;
+	*port_type = type;
+	ret = hccs_pcc_cmd_send(hdev, HCCS_PM_DEC_LANE, &desc);
+	if (ret)
+		dev_err(hdev->dev, "start to decrease lane failed, ret = %d.\n",
+			ret);
+
+	return ret;
+}
+
+static ssize_t dec_lane_of_type_store(struct kobject *kobj, struct kobj_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct hccs_dev *hdev = device_kobj_to_hccs_dev(kobj);
+	bool all_in_idle;
+	u8 port_type;
+	int ret;
+
+	ret = hccs_parse_pm_port_type(hdev, buf, &port_type);
+	if (ret)
+		return ret;
+
+	mutex_lock(&hdev->lock);
+	ret = hccs_get_all_spec_port_idle_sta(hdev, port_type, &all_in_idle);
+	if (ret)
+		goto out;
+	if (!all_in_idle) {
+		ret = -EBUSY;
+		dev_err(hdev->dev, "please don't decrease lanes on high load with %s, ret = %d.\n",
+			hccs_port_type_to_name(hdev, port_type), ret);
+		goto out;
+	}
+
+	ret = hccs_start_dec_lane(hdev, port_type);
+out:
+	mutex_unlock(&hdev->lock);
+
+	return ret == 0 ? count : ret;
+}
+static struct kobj_attribute dec_lane_of_type_attr =
+		__ATTR(dec_lane_of_type, 0200, NULL, dec_lane_of_type_store);
+
+static ssize_t inc_lane_of_type_store(struct kobject *kobj, struct kobj_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct hccs_dev *hdev = device_kobj_to_hccs_dev(kobj);
+	bool full_lane;
+	u8 port_type;
+	int ret;
+
+	ret = hccs_parse_pm_port_type(hdev, buf, &port_type);
+	if (ret)
+		return ret;
+
+	mutex_lock(&hdev->lock);
+	ret = hccs_get_all_spec_port_full_lane_sta(hdev, port_type, &full_lane);
+	if (ret || full_lane)
+		goto out;
+
+	ret = hccs_start_inc_lane(hdev, port_type);
+out:
+	mutex_unlock(&hdev->lock);
+	return ret == 0 ? count : ret;
+}
+static struct kobj_attribute inc_lane_of_type_attr =
+		__ATTR(inc_lane_of_type, 0200, NULL, inc_lane_of_type_store);
+
+static ssize_t available_inc_dec_lane_types_show(struct kobject *kobj,
+						 struct kobj_attribute *attr,
+						 char *buf)
+{
+	struct hccs_dev *hdev = device_kobj_to_hccs_dev(kobj);
+
+	if (hdev->caps & HCCS_CAPS_HCCS_V2_PM)
+		return sysfs_emit(buf, "%s\n",
+				  hccs_port_type_to_name(hdev, HCCS_V2));
+
+	return -EINVAL;
+}
+static struct kobj_attribute available_inc_dec_lane_types_attr =
+		__ATTR(available_inc_dec_lane_types, 0444,
+		       available_inc_dec_lane_types_show, NULL);
+
+static ssize_t used_types_show(struct kobject *kobj,
+			       struct kobj_attribute *attr, char *buf)
+{
+	struct hccs_dev *hdev = device_kobj_to_hccs_dev(kobj);
+	int len = 0;
+	u16 i;
+
+	for (i = 0; i < hdev->used_type_num - 1; i++)
+		len += sysfs_emit_at(buf, len, "%s ", hdev->type_name_maps[i].name);
+	len += sysfs_emit_at(buf, len, "%s\n", hdev->type_name_maps[i].name);
+
+	return len;
+}
+static struct kobj_attribute used_types_attr =
+		__ATTR(used_types, 0444, used_types_show, NULL);
+
+static void hccs_remove_misc_sysfs(struct hccs_dev *hdev)
+{
+	sysfs_remove_file(&hdev->dev->kobj, &used_types_attr.attr);
+
+	if (!(hdev->caps & HCCS_CAPS_HCCS_V2_PM))
+		return;
+
+	sysfs_remove_file(&hdev->dev->kobj,
+			  &available_inc_dec_lane_types_attr.attr);
+	sysfs_remove_file(&hdev->dev->kobj, &dec_lane_of_type_attr.attr);
+	sysfs_remove_file(&hdev->dev->kobj, &inc_lane_of_type_attr.attr);
+}
+
+static int hccs_add_misc_sysfs(struct hccs_dev *hdev)
+{
+	int ret;
+
+	ret = sysfs_create_file(&hdev->dev->kobj, &used_types_attr.attr);
+	if (ret)
+		return ret;
+
+	if (!(hdev->caps & HCCS_CAPS_HCCS_V2_PM))
+		return 0;
+
+	ret = sysfs_create_file(&hdev->dev->kobj,
+				&available_inc_dec_lane_types_attr.attr);
+	if (ret)
+		goto used_types_remove;
+
+	ret = sysfs_create_file(&hdev->dev->kobj, &dec_lane_of_type_attr.attr);
+	if (ret)
+		goto inc_dec_lane_types_remove;
+
+	ret = sysfs_create_file(&hdev->dev->kobj, &inc_lane_of_type_attr.attr);
+	if (ret)
+		goto dec_lane_of_type_remove;
+
+	return 0;
+
+dec_lane_of_type_remove:
+	sysfs_remove_file(&hdev->dev->kobj, &dec_lane_of_type_attr.attr);
+inc_dec_lane_types_remove:
+	sysfs_remove_file(&hdev->dev->kobj,
+			  &available_inc_dec_lane_types_attr.attr);
+used_types_remove:
+	sysfs_remove_file(&hdev->dev->kobj, &used_types_attr.attr);
+	return ret;
+}
+
 static void hccs_remove_die_dir(struct hccs_die_info *die)
 {
 	struct hccs_port_info *port;
@@ -1092,6 +1618,8 @@ static void hccs_remove_topo_dirs(struct hccs_dev *hdev)
 
 	for (i = 0; i < hdev->chip_num; i++)
 		hccs_remove_chip_dir(&hdev->chips[i]);
+
+	hccs_remove_misc_sysfs(hdev);
 }
 
 static int hccs_create_hccs_dir(struct hccs_dev *hdev,
@@ -1101,7 +1629,7 @@ static int hccs_create_hccs_dir(struct hccs_dev *hdev,
 	int ret;
 
 	ret = kobject_init_and_add(&port->kobj, &hccs_port_type,
-				   &die->kobj, "hccs%d", port->port_id);
+				   &die->kobj, "hccs%u", port->port_id);
 	if (ret) {
 		kobject_put(&port->kobj);
 		return ret;
@@ -1119,7 +1647,7 @@ static int hccs_create_die_dir(struct hccs_dev *hdev,
 	u16 i;
 
 	ret = kobject_init_and_add(&die->kobj, &hccs_die_type,
-				   &chip->kobj, "die%d", die->die_id);
+				   &chip->kobj, "die%u", die->die_id);
 	if (ret) {
 		kobject_put(&die->kobj);
 		return ret;
@@ -1129,7 +1657,7 @@ static int hccs_create_die_dir(struct hccs_dev *hdev,
 		port = &die->ports[i];
 		ret = hccs_create_hccs_dir(hdev, die, port);
 		if (ret) {
-			dev_err(hdev->dev, "create hccs%d dir failed.\n",
+			dev_err(hdev->dev, "create hccs%u dir failed.\n",
 				port->port_id);
 			goto err;
 		}
@@ -1151,7 +1679,7 @@ static int hccs_create_chip_dir(struct hccs_dev *hdev,
 	u16 id;
 
 	ret = kobject_init_and_add(&chip->kobj, &hccs_chip_type,
-				   &hdev->dev->kobj, "chip%d", chip->chip_id);
+				   &hdev->dev->kobj, "chip%u", chip->chip_id);
 	if (ret) {
 		kobject_put(&chip->kobj);
 		return ret;
@@ -1182,11 +1710,17 @@ static int hccs_create_topo_dirs(struct hccs_dev *hdev)
 		chip = &hdev->chips[id];
 		ret = hccs_create_chip_dir(hdev, chip);
 		if (ret) {
-			dev_err(hdev->dev, "init chip%d dir failed!\n", id);
+			dev_err(hdev->dev, "init chip%u dir failed!\n", id);
 			goto err;
 		}
 	}
 
+	ret = hccs_add_misc_sysfs(hdev);
+	if (ret) {
+		dev_err(hdev->dev, "create misc sysfs interface failed, ret = %d\n", ret);
+		goto err;
+	}
+
 	return 0;
 err:
 	for (k = 0; k < id; k++)
@@ -1216,6 +1750,11 @@ static int hccs_probe(struct platform_device *pdev)
 	hdev->dev = &pdev->dev;
 	platform_set_drvdata(pdev, hdev);
 
+	/*
+	 * Here would never be failure as the driver and device has been matched.
+	 */
+	hdev->verspec_data = acpi_device_get_match_data(hdev->dev);
+
 	mutex_init(&hdev->lock);
 	rc = hccs_get_pcc_chan_id(hdev);
 	if (rc)
@@ -1232,6 +1771,10 @@ static int hccs_probe(struct platform_device *pdev)
 	if (rc)
 		goto unregister_pcc_chan;
 
+	rc = hccs_init_type_name_maps(hdev);
+	if (rc)
+		goto unregister_pcc_chan;
+
 	rc = hccs_create_topo_dirs(hdev);
 	if (rc)
 		goto unregister_pcc_chan;
@@ -1244,19 +1787,34 @@ unregister_pcc_chan:
 	return rc;
 }
 
-static int hccs_remove(struct platform_device *pdev)
+static void hccs_remove(struct platform_device *pdev)
 {
 	struct hccs_dev *hdev = platform_get_drvdata(pdev);
 
 	hccs_remove_topo_dirs(hdev);
 	hccs_unregister_pcc_channel(hdev);
-
-	return 0;
 }
 
+static const struct hccs_verspecific_data hisi04b1_verspec_data = {
+	.rx_callback = NULL,
+	.wait_cmd_complete = hccs_wait_cmd_complete_by_poll,
+	.fill_pcc_shared_mem = hccs_fill_pcc_shared_mem_region,
+	.shared_mem_size = sizeof(struct acpi_pcct_shared_memory),
+	.has_txdone_irq = false,
+};
+
+static const struct hccs_verspecific_data hisi04b2_verspec_data = {
+	.rx_callback = hccs_pcc_rx_callback,
+	.wait_cmd_complete = hccs_wait_cmd_complete_by_irq,
+	.fill_pcc_shared_mem = hccs_fill_ext_pcc_shared_mem_region,
+	.shared_mem_size = sizeof(struct acpi_pcct_ext_pcc_shared_memory),
+	.has_txdone_irq = true,
+};
+
 static const struct acpi_device_id hccs_acpi_match[] = {
-	{ "HISI04B1"},
-	{ ""},
+	{ "HISI04B1", (unsigned long)&hisi04b1_verspec_data},
+	{ "HISI04B2", (unsigned long)&hisi04b2_verspec_data},
+	{ }
 };
 MODULE_DEVICE_TABLE(acpi, hccs_acpi_match);