@@ -9488,6 +9488,12 @@ S: Maintained
F: Documentation/ABI/testing/debugfs-hisi-zip
F: drivers/crypto/hisilicon/zip/
+HISILICON KUNPENG SOC HCCS DRIVER
+M: Huisong Li <lihuisong@huawei.com>
+S: Maintained
+F: drivers/soc/hisilicon/kunpeng_hccs.c
+F: drivers/soc/hisilicon/kunpeng_hccs.h
+
HMM - Heterogeneous Memory Management
M: Jérôme Glisse <jglisse@redhat.com>
L: linux-mm@kvack.org
@@ -10,6 +10,7 @@ source "drivers/soc/bcm/Kconfig"
source "drivers/soc/canaan/Kconfig"
source "drivers/soc/fsl/Kconfig"
source "drivers/soc/fujitsu/Kconfig"
+source "drivers/soc/hisilicon/Kconfig"
source "drivers/soc/imx/Kconfig"
source "drivers/soc/ixp4xx/Kconfig"
source "drivers/soc/litex/Kconfig"
@@ -13,6 +13,7 @@ obj-$(CONFIG_MACH_DOVE) += dove/
obj-y += fsl/
obj-y += fujitsu/
obj-$(CONFIG_ARCH_GEMINI) += gemini/
+obj-y += hisilicon/
obj-y += imx/
obj-y += ixp4xx/
obj-$(CONFIG_SOC_XWAY) += lantiq/
new file mode 100644
@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+menu "Hisilicon SoC drivers"
+ depends on ARCH_HISI || COMPILE_TEST
+
+config KUNPENG_HCCS
+ tristate "HCCS driver on Kunpeng SoC"
+ depends on ACPI
+ depends on ARM64 || COMPILE_TEST
+ help
+ The Huawei Cache Coherence System (HCCS) is a multi-chip
+ interconnection bus protocol.
+ The performance of application may be affected if some hccs
+ ports are not in full lane status, have a large number of CRC
+ errors and so on.
+
+ Say M here if you want to include support for querying the
+ health status and port information of HCCS on Kunpeng SoC.
+
+endmenu
new file mode 100644
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-$(CONFIG_KUNPENG_HCCS) += kunpeng_hccs.o
new file mode 100644
@@ -0,0 +1,1282 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * The Huawei Cache Coherence System (HCCS) is a multi-chip interconnection
+ * bus protocol.
+ *
+ * Copyright (c) 2023 Hisilicon Limited.
+ * Author: Huisong Li <lihuisong@huawei.com>
+ *
+ * HCCS driver for Kunpeng SoC provides the following features:
+ * - Retrieve the following information about each port:
+ * - port type
+ * - lane mode
+ * - enable
+ * - current lane mode
+ * - link finite state machine
+ * - lane mask
+ * - CRC error count
+ *
+ * - Retrieve the following information about all the ports on the chip or
+ * the die:
+ * - if all enabled ports are in linked
+ * - if all linked ports are in full lane
+ * - CRC error count sum
+ */
+#include <linux/acpi.h>
+#include <linux/iopoll.h>
+#include <linux/platform_device.h>
+#include <linux/sysfs.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
+ */
+#define HCCS_PCC_CMD_WAIT_RETRIES_NUM 500ULL
+#define HCCS_POLL_STATUS_TIME_INTERVAL_US 3
+
+static struct hccs_port_info *kobj_to_port_info(struct kobject *k)
+{
+ return container_of(k, struct hccs_port_info, kobj);
+}
+
+static struct hccs_die_info *kobj_to_die_info(struct kobject *k)
+{
+ return container_of(k, struct hccs_die_info, kobj);
+}
+
+static struct hccs_chip_info *kobj_to_chip_info(struct kobject *k)
+{
+ return container_of(k, struct hccs_chip_info, kobj);
+}
+
+struct hccs_register_ctx {
+ struct device *dev;
+ u8 chan_id;
+ int err;
+};
+
+static acpi_status hccs_get_register_cb(struct acpi_resource *ares,
+ void *context)
+{
+ struct acpi_resource_generic_register *reg;
+ struct hccs_register_ctx *ctx = context;
+
+ if (ares->type != ACPI_RESOURCE_TYPE_GENERIC_REGISTER)
+ return AE_OK;
+
+ reg = &ares->data.generic_reg;
+ if (reg->space_id != ACPI_ADR_SPACE_PLATFORM_COMM) {
+ dev_err(ctx->dev, "Bad register resource.\n");
+ ctx->err = -EINVAL;
+ return AE_ERROR;
+ }
+ ctx->chan_id = reg->access_size;
+
+ return AE_OK;
+}
+
+static int hccs_get_pcc_chan_id(struct hccs_dev *hdev)
+{
+ acpi_handle handle = ACPI_HANDLE(hdev->dev);
+ struct hccs_register_ctx ctx = {0};
+ acpi_status status;
+
+ if (!acpi_has_method(handle, METHOD_NAME__CRS))
+ return -ENODEV;
+
+ ctx.dev = hdev->dev;
+ status = acpi_walk_resources(handle, METHOD_NAME__CRS,
+ hccs_get_register_cb, &ctx);
+ if (ACPI_FAILURE(status))
+ return ctx.err;
+ hdev->chan_id = ctx.chan_id;
+
+ return 0;
+}
+
+static void hccs_chan_tx_done(struct mbox_client *cl, void *msg, int ret)
+{
+ if (ret < 0)
+ pr_debug("TX did not complete: CMD sent:0x%x, ret:%d\n",
+ *(u8 *)msg, ret);
+ else
+ pr_debug("TX completed. CMD sent:0x%x, ret:%d\n",
+ *(u8 *)msg, ret);
+}
+
+static void hccs_unregister_pcc_channel(struct hccs_dev *hdev)
+{
+ struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
+
+ if (cl_info->pcc_comm_addr)
+ iounmap(cl_info->pcc_comm_addr);
+ pcc_mbox_free_channel(hdev->cl_info.pcc_chan);
+}
+
+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 device *dev = hdev->dev;
+ int rc;
+
+ cl->dev = dev;
+ cl->tx_block = false;
+ cl->knows_txdone = true;
+ cl->tx_done = hccs_chan_tx_done;
+ pcc_chan = pcc_mbox_request_channel(cl, hdev->chan_id);
+ if (IS_ERR(pcc_chan)) {
+ dev_err(dev, "PPC channel request failed.\n");
+ rc = -ENODEV;
+ goto out;
+ }
+ cl_info->pcc_chan = pcc_chan;
+ cl_info->mbox_chan = pcc_chan->mchan;
+
+ /*
+ * pcc_chan->latency is just a nominal value. In reality the remote
+ * processor could be much slower to reply. So add an arbitrary amount
+ * of wait on top of nominal.
+ */
+ cl_info->deadline_us =
+ HCCS_PCC_CMD_WAIT_RETRIES_NUM * pcc_chan->latency;
+ if (cl_info->mbox_chan->mbox->txdone_irq) {
+ dev_err(dev, "PCC IRQ in PCCT is enabled.\n");
+ rc = -EINVAL;
+ goto err_mbx_channel_free;
+ }
+
+ if (pcc_chan->shmem_base_addr) {
+ cl_info->pcc_comm_addr = (void __force *)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;
+ }
+ }
+
+ return 0;
+
+err_mbx_channel_free:
+ pcc_mbox_free_channel(cl_info->pcc_chan);
+out:
+ return rc;
+}
+
+static int hccs_check_chan_cmd_complete(struct hccs_dev *hdev)
+{
+ struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
+ struct acpi_pcct_shared_memory *comm_base = cl_info->pcc_comm_addr;
+ u16 status;
+ int ret;
+
+ /*
+ * Poll PCC status register every 3us(delay_us) for maximum of
+ * 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,
+ HCCS_POLL_STATUS_TIME_INTERVAL_US,
+ cl_info->deadline_us);
+ if (unlikely(ret))
+ dev_err(hdev->dev, "poll PCC status failed, ret = %d.\n", ret);
+
+ return ret;
+}
+
+static int hccs_pcc_cmd_send(struct hccs_dev *hdev, u8 cmd,
+ struct hccs_desc *desc)
+{
+ struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
+ struct acpi_pcct_shared_memory *comm_base = cl_info->pcc_comm_addr;
+ void *comm_space = (void *)(comm_base + 1);
+ struct hccs_fw_inner_head *fw_inner_head;
+ struct acpi_pcct_shared_memory tmp = {0};
+ u16 comm_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(comm_base, (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);
+
+ /* Ring doorbell */
+ ret = mbox_send_message(cl_info->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);
+ if (ret)
+ goto end;
+
+ /* Copy response data */
+ memcpy_fromio((void *)desc, comm_space, comm_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",
+ fw_inner_head->retStatus);
+ ret = -EIO;
+ }
+
+end:
+ mbox_client_txdone(cl_info->mbox_chan, ret);
+ return ret;
+}
+
+static void hccs_init_req_desc(struct hccs_desc *desc)
+{
+ struct hccs_req_desc *req = &desc->req;
+
+ memset(desc, 0, sizeof(*desc));
+ req->req_head.module_code = HCCS_SERDES_MODULE_CODE;
+}
+
+static int hccs_get_dev_caps(struct hccs_dev *hdev)
+{
+ struct hccs_desc desc;
+ int ret;
+
+ hccs_init_req_desc(&desc);
+ ret = hccs_pcc_cmd_send(hdev, HCCS_GET_DEV_CAP, &desc);
+ if (ret) {
+ dev_err(hdev->dev, "Get device capabilities failed, ret = %d.\n",
+ ret);
+ return ret;
+ }
+ memcpy(&hdev->caps, desc.rsp.data, sizeof(hdev->caps));
+
+ return 0;
+}
+
+static int hccs_query_chip_num_on_platform(struct hccs_dev *hdev)
+{
+ struct hccs_desc desc;
+ int ret;
+
+ hccs_init_req_desc(&desc);
+ ret = hccs_pcc_cmd_send(hdev, HCCS_GET_CHIP_NUM, &desc);
+ if (ret) {
+ dev_err(hdev->dev, "query system chip number failed, ret = %d.\n",
+ ret);
+ return ret;
+ }
+
+ hdev->chip_num = *((u8 *)&desc.rsp.data);
+ if (!hdev->chip_num) {
+ dev_err(hdev->dev, "chip num obtained from firmware is zero.\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int hccs_get_chip_info(struct hccs_dev *hdev,
+ struct hccs_chip_info *chip)
+{
+ struct hccs_die_num_req_param *req_param;
+ struct hccs_desc desc;
+ int ret;
+
+ hccs_init_req_desc(&desc);
+ req_param = (struct hccs_die_num_req_param *)desc.req.data;
+ req_param->chip_id = chip->chip_id;
+ ret = hccs_pcc_cmd_send(hdev, HCCS_GET_DIE_NUM, &desc);
+ if (ret)
+ return ret;
+
+ chip->die_num = *((u8 *)&desc.rsp.data);
+
+ return 0;
+}
+
+static int hccs_query_chip_info_on_platform(struct hccs_dev *hdev)
+{
+ struct hccs_chip_info *chip;
+ int ret;
+ u8 idx;
+
+ ret = hccs_query_chip_num_on_platform(hdev);
+ if (ret) {
+ dev_err(hdev->dev, "query chip number on platform failed, ret = %d.\n",
+ ret);
+ return ret;
+ }
+
+ hdev->chips = devm_kzalloc(hdev->dev,
+ hdev->chip_num * sizeof(struct hccs_chip_info),
+ GFP_KERNEL);
+ if (!hdev->chips) {
+ dev_err(hdev->dev, "allocate all chips memory failed.\n");
+ return -ENOMEM;
+ }
+
+ for (idx = 0; idx < hdev->chip_num; idx++) {
+ chip = &hdev->chips[idx];
+ chip->chip_id = idx;
+ ret = hccs_get_chip_info(hdev, chip);
+ if (ret) {
+ dev_err(hdev->dev, "get chip%u info failed, ret = %d.\n",
+ idx, ret);
+ return ret;
+ }
+ chip->hdev = hdev;
+ }
+
+ return 0;
+}
+
+static int hccs_query_die_info_on_chip(struct hccs_dev *hdev, u8 chip_id,
+ u8 die_idx, struct hccs_die_info *die)
+{
+ struct hccs_die_info_req_param *req_param;
+ struct hccs_die_info_rsp_data *rsp_data;
+ struct hccs_desc desc;
+ int ret;
+
+ hccs_init_req_desc(&desc);
+ req_param = (struct hccs_die_info_req_param *)desc.req.data;
+ req_param->chip_id = chip_id;
+ req_param->die_idx = die_idx;
+ ret = hccs_pcc_cmd_send(hdev, HCCS_GET_DIE_INFO, &desc);
+ if (ret)
+ return ret;
+
+ rsp_data = (struct hccs_die_info_rsp_data *)desc.rsp.data;
+ die->die_id = rsp_data->die_id;
+ die->port_num = rsp_data->port_num;
+ die->min_port_id = rsp_data->min_port_id;
+ die->max_port_id = rsp_data->max_port_id;
+ if (die->min_port_id > die->max_port_id) {
+ dev_err(hdev->dev, "min port id(%u) > max port id(%u) on die_idx(%u).\n",
+ die->min_port_id, die->max_port_id, die_idx);
+ return -EINVAL;
+ }
+ if (die->max_port_id > HCCS_DIE_MAX_PORT_ID) {
+ dev_err(hdev->dev, "max port id(%u) on die_idx(%u) is too big.\n",
+ die->max_port_id, die_idx);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+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;
+ u8 i, j;
+ int ret;
+
+ for (i = 0; i < hdev->chip_num; i++) {
+ chip = &hdev->chips[i];
+ if (!chip->die_num)
+ continue;
+
+ chip->dies = devm_kzalloc(hdev->dev,
+ chip->die_num * sizeof(struct hccs_die_info),
+ GFP_KERNEL);
+ if (!chip->dies) {
+ dev_err(dev, "allocate all dies memory on chip%u failed.\n",
+ i);
+ return -ENOMEM;
+ }
+
+ for (j = 0; j < chip->die_num; j++) {
+ die = &chip->dies[j];
+ ret = hccs_query_die_info_on_chip(hdev, i, j, die);
+ if (ret) {
+ dev_err(dev, "get die idx (%u) info on chip%u failed, ret = %d.\n",
+ j, i, ret);
+ return ret;
+ }
+ die->chip = chip;
+ }
+ }
+
+ return 0;
+}
+
+static int hccs_get_bd_info(struct hccs_dev *hdev, u8 opcode,
+ struct hccs_desc *desc,
+ void *buf, size_t buf_len,
+ struct hccs_rsp_head *rsp_head)
+{
+ struct hccs_rsp_head *head;
+ struct hccs_rsp_desc *rsp;
+ int ret;
+
+ ret = hccs_pcc_cmd_send(hdev, opcode, desc);
+ if (ret)
+ return ret;
+
+ rsp = &desc->rsp;
+ head = &rsp->rsp_head;
+ if (head->data_len > buf_len) {
+ dev_err(hdev->dev,
+ "buffer overflow (buf_len = %lu, data_len = %u)!\n",
+ buf_len, head->data_len);
+ return -ENOMEM;
+ }
+
+ memcpy(buf, rsp->data, head->data_len);
+ *rsp_head = *head;
+
+ return 0;
+}
+
+static int hccs_get_all_port_attr(struct hccs_dev *hdev,
+ struct hccs_die_info *die,
+ struct hccs_port_attr *attrs, u16 size)
+{
+ struct hccs_die_comm_req_param *req_param;
+ struct hccs_req_head *req_head;
+ struct hccs_rsp_head rsp_head;
+ struct hccs_desc desc;
+ size_t left_buf_len;
+ u32 data_len = 0;
+ u8 start_id;
+ u8 *buf;
+ int ret;
+
+ buf = (u8 *)attrs;
+ left_buf_len = sizeof(struct hccs_port_attr) * size;
+ start_id = die->min_port_id;
+ while (start_id <= die->max_port_id) {
+ hccs_init_req_desc(&desc);
+ req_head = &desc.req.req_head;
+ req_head->start_id = start_id;
+ req_param = (struct hccs_die_comm_req_param *)desc.req.data;
+ req_param->chip_id = die->chip->chip_id;
+ req_param->die_id = die->die_id;
+
+ ret = hccs_get_bd_info(hdev, HCCS_GET_DIE_PORT_INFO, &desc,
+ buf + data_len, left_buf_len, &rsp_head);
+ if (ret) {
+ dev_err(hdev->dev,
+ "get the information of port%u on die%u failed, ret = %d.\n",
+ start_id, die->die_id, ret);
+ return ret;
+ }
+
+ data_len += rsp_head.data_len;
+ left_buf_len -= rsp_head.data_len;
+ if (unlikely(rsp_head.next_id <= start_id)) {
+ dev_err(hdev->dev,
+ "next port id (%u) is not greater than last start id (%u) on die%u.\n",
+ rsp_head.next_id, start_id, die->die_id);
+ return -EINVAL;
+ }
+ start_id = rsp_head.next_id;
+ }
+
+ return 0;
+}
+
+static int hccs_get_all_port_info_on_die(struct hccs_dev *hdev,
+ struct hccs_die_info *die)
+{
+ struct hccs_port_attr *attrs;
+ struct hccs_port_info *port;
+ int ret;
+ u8 i;
+
+ attrs = kcalloc(die->port_num, sizeof(struct hccs_port_attr),
+ GFP_KERNEL);
+ if (!attrs)
+ return -ENOMEM;
+
+ ret = hccs_get_all_port_attr(hdev, die, attrs, die->port_num);
+ if (ret)
+ goto out;
+
+ for (i = 0; i < die->port_num; i++) {
+ 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->enable = attrs[i].enable;
+ port->die = die;
+ }
+
+out:
+ kfree(attrs);
+ return ret;
+}
+
+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;
+ u8 i, j;
+ int ret;
+
+ for (i = 0; i < hdev->chip_num; i++) {
+ chip = &hdev->chips[i];
+ for (j = 0; j < chip->die_num; j++) {
+ die = &chip->dies[j];
+ if (!die->port_num)
+ continue;
+
+ die->ports = devm_kzalloc(dev,
+ die->port_num * sizeof(struct hccs_port_info),
+ GFP_KERNEL);
+ if (!die->ports) {
+ dev_err(dev, "allocate ports memory on chip%u/die%u failed.\n",
+ i, die->die_id);
+ return -ENOMEM;
+ }
+
+ ret = hccs_get_all_port_info_on_die(hdev, die);
+ if (ret) {
+ dev_err(dev, "get die(%u) info on chip%u failed, ret = %d.\n",
+ die->die_id, i, ret);
+ return ret;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int hccs_get_hw_info(struct hccs_dev *hdev)
+{
+ int ret;
+
+ ret = hccs_query_chip_info_on_platform(hdev);
+ if (ret) {
+ dev_err(hdev->dev, "query chip info on platform failed, ret = %d.\n",
+ ret);
+ return ret;
+ }
+
+ ret = hccs_query_all_die_info_on_platform(hdev);
+ if (ret) {
+ dev_err(hdev->dev, "query all die info on platform failed, ret = %d.\n",
+ ret);
+ return ret;
+ }
+
+ ret = hccs_query_all_port_info_on_platform(hdev);
+ if (ret) {
+ dev_err(hdev->dev, "query all port info on platform failed, ret = %d.\n",
+ ret);
+ return ret;
+ }
+
+ 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)
+{
+ 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_LINK_STATUS, &desc);
+ if (ret) {
+ dev_err(hdev->dev,
+ "get port link status info failed, ret = %d.\n", ret);
+ return ret;
+ }
+
+ *link_status = *((struct hccs_link_status *)desc.rsp.data);
+
+ return 0;
+}
+
+static int hccs_query_port_crc_err_cnt(struct hccs_dev *hdev,
+ const struct hccs_port_info *port,
+ u64 *crc_err_cnt)
+{
+ 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_CRC_ERR_CNT, &desc);
+ if (ret) {
+ dev_err(hdev->dev,
+ "get port crc error count failed, ret = %d.\n", ret);
+ return ret;
+ }
+
+ memcpy(crc_err_cnt, &desc.rsp.data, sizeof(u64));
+
+ return 0;
+}
+
+static int hccs_get_die_all_link_status(struct hccs_dev *hdev,
+ const struct hccs_die_info *die,
+ u8 *all_linked)
+{
+ struct hccs_die_comm_req_param *req_param;
+ struct hccs_desc desc;
+ int ret;
+
+ if (die->port_num == 0) {
+ *all_linked = 1;
+ return 0;
+ }
+
+ hccs_init_req_desc(&desc);
+ req_param = (struct hccs_die_comm_req_param *)desc.req.data;
+ req_param->chip_id = die->chip->chip_id;
+ req_param->die_id = die->die_id;
+ ret = hccs_pcc_cmd_send(hdev, HCCS_GET_DIE_PORTS_LANE_STA, &desc);
+ if (ret) {
+ dev_err(hdev->dev,
+ "get link status of all ports failed on die%u, ret = %d.\n",
+ die->die_id, ret);
+ return ret;
+ }
+
+ *all_linked = *((u8 *)&desc.rsp.data);
+
+ return 0;
+}
+
+static int hccs_get_die_all_port_lane_status(struct hccs_dev *hdev,
+ const struct hccs_die_info *die,
+ u8 *full_lane)
+{
+ struct hccs_die_comm_req_param *req_param;
+ struct hccs_desc desc;
+ int ret;
+
+ if (die->port_num == 0) {
+ *full_lane = 1;
+ return 0;
+ }
+
+ hccs_init_req_desc(&desc);
+ req_param = (struct hccs_die_comm_req_param *)desc.req.data;
+ req_param->chip_id = die->chip->chip_id;
+ req_param->die_id = die->die_id;
+ ret = hccs_pcc_cmd_send(hdev, HCCS_GET_DIE_PORTS_LANE_STA, &desc);
+ if (ret) {
+ dev_err(hdev->dev, "get lane status of all ports failed on die%u, ret = %d.\n",
+ die->die_id, ret);
+ return ret;
+ }
+
+ *full_lane = *((u8 *)&desc.rsp.data);
+
+ return 0;
+}
+
+static int hccs_get_die_total_crc_err_cnt(struct hccs_dev *hdev,
+ const struct hccs_die_info *die,
+ u64 *total_crc_err_cnt)
+{
+ struct hccs_die_comm_req_param *req_param;
+ struct hccs_desc desc;
+ int ret;
+
+ if (die->port_num == 0) {
+ *total_crc_err_cnt = 0;
+ return 0;
+ }
+
+ hccs_init_req_desc(&desc);
+ req_param = (struct hccs_die_comm_req_param *)desc.req.data;
+ req_param->chip_id = die->chip->chip_id;
+ req_param->die_id = die->die_id;
+ ret = hccs_pcc_cmd_send(hdev, HCCS_GET_DIE_PORTS_CRC_ERR_CNT, &desc);
+ if (ret) {
+ dev_err(hdev->dev, "get crc error count sum failed on die%u, ret = %d.\n",
+ die->die_id, ret);
+ return ret;
+ }
+
+ memcpy(total_crc_err_cnt, &desc.rsp.data, sizeof(u64));
+
+ return 0;
+}
+
+static ssize_t hccs_show(struct kobject *k, struct attribute *attr, char *buf)
+{
+ struct kobj_attribute *kobj_attr;
+
+ kobj_attr = container_of(attr, struct kobj_attribute, attr);
+
+ return kobj_attr->show(k, kobj_attr, buf);
+}
+
+static const struct sysfs_ops hccs_comm_ops = {
+ .show = hccs_show,
+};
+
+static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ const struct hccs_port_info *port = kobj_to_port_info(kobj);
+
+ return sysfs_emit(buf, "HCCS-v%u\n", port->port_type);
+}
+
+static struct kobj_attribute hccs_type_attr = __ATTR_RO(type);
+
+static ssize_t lane_mode_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *buf)
+{
+ const struct hccs_port_info *port = kobj_to_port_info(kobj);
+
+ return sysfs_emit(buf, "x%u\n", port->lane_mode);
+}
+
+static struct kobj_attribute lane_mode_attr = __ATTR_RO(lane_mode);
+
+static ssize_t enable_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ const struct hccs_port_info *port = kobj_to_port_info(kobj);
+
+ return sysfs_emit(buf, "%u\n", port->enable);
+}
+
+static struct kobj_attribute port_enable_attr = __ATTR_RO(enable);
+
+static ssize_t cur_lane_num_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ const struct hccs_port_info *port = kobj_to_port_info(kobj);
+ struct hccs_dev *hdev = port->die->chip->hdev;
+ struct hccs_link_status link_status = {0};
+ int ret;
+
+ mutex_lock(&hdev->lock);
+ ret = hccs_query_port_link_status(hdev, port, &link_status);
+ mutex_unlock(&hdev->lock);
+ if (ret)
+ return ret;
+
+ return sysfs_emit(buf, "%u\n", link_status.lane_num);
+}
+
+static struct kobj_attribute cur_lane_num_attr = __ATTR_RO(cur_lane_num);
+
+static ssize_t link_fsm_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ const struct hccs_port_info *port = kobj_to_port_info(kobj);
+ struct hccs_dev *hdev = port->die->chip->hdev;
+ struct hccs_link_status link_status = {0};
+ const struct {
+ u8 link_fsm;
+ char *str;
+ } link_fsm_map[] = {
+ {HCCS_PORT_RESET, "reset"},
+ {HCCS_PORT_SETUP, "setup"},
+ {HCCS_PORT_CONFIG, "config"},
+ {HCCS_PORT_READY, "link-up"},
+ };
+ const char *link_fsm_str = "unknown";
+ size_t i;
+ int ret;
+
+ mutex_lock(&hdev->lock);
+ ret = hccs_query_port_link_status(hdev, port, &link_status);
+ mutex_unlock(&hdev->lock);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < ARRAY_SIZE(link_fsm_map); i++) {
+ if (link_fsm_map[i].link_fsm == link_status.link_fsm) {
+ link_fsm_str = link_fsm_map[i].str;
+ break;
+ }
+ }
+
+ return sysfs_emit(buf, "%s\n", link_fsm_str);
+}
+
+static struct kobj_attribute link_fsm_attr = __ATTR_RO(link_fsm);
+
+static ssize_t lane_mask_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ const struct hccs_port_info *port = kobj_to_port_info(kobj);
+ struct hccs_dev *hdev = port->die->chip->hdev;
+ struct hccs_link_status link_status = {0};
+ int ret;
+
+ mutex_lock(&hdev->lock);
+ ret = hccs_query_port_link_status(hdev, port, &link_status);
+ mutex_unlock(&hdev->lock);
+ if (ret)
+ return ret;
+
+ return sysfs_emit(buf, "0x%x\n", link_status.lane_mask);
+}
+
+static struct kobj_attribute lane_mask_attr = __ATTR_RO(lane_mask);
+
+static ssize_t crc_err_cnt_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ const struct hccs_port_info *port = kobj_to_port_info(kobj);
+ struct hccs_dev *hdev = port->die->chip->hdev;
+ u64 crc_err_cnt;
+ int ret;
+
+ mutex_lock(&hdev->lock);
+ ret = hccs_query_port_crc_err_cnt(hdev, port, &crc_err_cnt);
+ mutex_unlock(&hdev->lock);
+ if (ret)
+ return ret;
+
+ return sysfs_emit(buf, "%llu\n", crc_err_cnt);
+}
+
+static struct kobj_attribute crc_err_cnt_attr = __ATTR_RO(crc_err_cnt);
+
+static struct attribute *hccs_port_default_attrs[] = {
+ &hccs_type_attr.attr,
+ &lane_mode_attr.attr,
+ &port_enable_attr.attr,
+ &cur_lane_num_attr.attr,
+ &link_fsm_attr.attr,
+ &lane_mask_attr.attr,
+ &crc_err_cnt_attr.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(hccs_port_default);
+
+static const struct kobj_type hccs_port_type = {
+ .sysfs_ops = &hccs_comm_ops,
+ .default_groups = hccs_port_default_groups,
+};
+
+static ssize_t all_linked_on_die_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ const struct hccs_die_info *die = kobj_to_die_info(kobj);
+ struct hccs_dev *hdev = die->chip->hdev;
+ u8 all_linked;
+ int ret;
+
+ mutex_lock(&hdev->lock);
+ ret = hccs_get_die_all_link_status(hdev, die, &all_linked);
+ mutex_unlock(&hdev->lock);
+ if (ret)
+ return ret;
+
+ return sysfs_emit(buf, "%u\n", all_linked);
+}
+static struct kobj_attribute all_linked_on_die_attr =
+ __ATTR(all_linked, 0444, all_linked_on_die_show, NULL);
+
+static ssize_t linked_full_lane_on_die_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *buf)
+{
+ const struct hccs_die_info *die = kobj_to_die_info(kobj);
+ struct hccs_dev *hdev = die->chip->hdev;
+ u8 full_lane;
+ int ret;
+
+ mutex_lock(&hdev->lock);
+ ret = hccs_get_die_all_port_lane_status(hdev, die, &full_lane);
+ mutex_unlock(&hdev->lock);
+ if (ret)
+ return ret;
+
+ return sysfs_emit(buf, "%u\n", full_lane);
+}
+static struct kobj_attribute linked_full_lane_on_die_attr =
+ __ATTR(linked_full_lane, 0444, linked_full_lane_on_die_show, NULL);
+
+static ssize_t crc_err_cnt_sum_on_die_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *buf)
+{
+ const struct hccs_die_info *die = kobj_to_die_info(kobj);
+ struct hccs_dev *hdev = die->chip->hdev;
+ u64 total_crc_err_cnt;
+ int ret;
+
+ mutex_lock(&hdev->lock);
+ ret = hccs_get_die_total_crc_err_cnt(hdev, die, &total_crc_err_cnt);
+ mutex_unlock(&hdev->lock);
+ if (ret)
+ return ret;
+
+ return sysfs_emit(buf, "%llu\n", total_crc_err_cnt);
+}
+static struct kobj_attribute crc_err_cnt_sum_on_die_attr =
+ __ATTR(crc_err_cnt, 0444, crc_err_cnt_sum_on_die_show, NULL);
+
+static struct attribute *hccs_die_default_attrs[] = {
+ &all_linked_on_die_attr.attr,
+ &linked_full_lane_on_die_attr.attr,
+ &crc_err_cnt_sum_on_die_attr.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(hccs_die_default);
+
+static const struct kobj_type hccs_die_type = {
+ .sysfs_ops = &hccs_comm_ops,
+ .default_groups = hccs_die_default_groups,
+};
+
+static ssize_t all_linked_on_chip_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *buf)
+{
+ const struct hccs_chip_info *chip = kobj_to_chip_info(kobj);
+ struct hccs_dev *hdev = chip->hdev;
+ const struct hccs_die_info *die;
+ u8 all_linked = 1;
+ u8 i, tmp;
+ int ret;
+
+ mutex_lock(&hdev->lock);
+ for (i = 0; i < chip->die_num; i++) {
+ die = &chip->dies[i];
+ ret = hccs_get_die_all_link_status(hdev, die, &tmp);
+ if (ret) {
+ mutex_unlock(&hdev->lock);
+ return ret;
+ }
+ if (tmp != all_linked) {
+ all_linked = 0;
+ break;
+ }
+ }
+ mutex_unlock(&hdev->lock);
+
+ return sysfs_emit(buf, "%u\n", all_linked);
+}
+static struct kobj_attribute all_linked_on_chip_attr =
+ __ATTR(all_linked, 0444, all_linked_on_chip_show, NULL);
+
+static ssize_t linked_full_lane_on_chip_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *buf)
+{
+ const struct hccs_chip_info *chip = kobj_to_chip_info(kobj);
+ struct hccs_dev *hdev = chip->hdev;
+ const struct hccs_die_info *die;
+ u8 full_lane = 1;
+ u8 i, tmp;
+ int ret;
+
+ mutex_lock(&hdev->lock);
+ for (i = 0; i < chip->die_num; i++) {
+ die = &chip->dies[i];
+ ret = hccs_get_die_all_port_lane_status(hdev, die, &tmp);
+ if (ret) {
+ mutex_unlock(&hdev->lock);
+ return ret;
+ }
+ if (tmp != full_lane) {
+ full_lane = 0;
+ break;
+ }
+ }
+ mutex_unlock(&hdev->lock);
+
+ return sysfs_emit(buf, "%u\n", full_lane);
+}
+static struct kobj_attribute linked_full_lane_on_chip_attr =
+ __ATTR(linked_full_lane, 0444, linked_full_lane_on_chip_show, NULL);
+
+static ssize_t crc_err_cnt_sum_on_chip_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *buf)
+{
+ const struct hccs_chip_info *chip = kobj_to_chip_info(kobj);
+ u64 crc_err_cnt, total_crc_err_cnt = 0;
+ struct hccs_dev *hdev = chip->hdev;
+ const struct hccs_die_info *die;
+ int ret;
+ u16 i;
+
+ mutex_lock(&hdev->lock);
+ for (i = 0; i < chip->die_num; i++) {
+ die = &chip->dies[i];
+ ret = hccs_get_die_total_crc_err_cnt(hdev, die, &crc_err_cnt);
+ if (ret) {
+ mutex_unlock(&hdev->lock);
+ return ret;
+ }
+
+ total_crc_err_cnt += crc_err_cnt;
+ }
+ mutex_unlock(&hdev->lock);
+
+ return sysfs_emit(buf, "%llu\n", total_crc_err_cnt);
+}
+static struct kobj_attribute crc_err_cnt_sum_on_chip_attr =
+ __ATTR(crc_err_cnt, 0444, crc_err_cnt_sum_on_chip_show, NULL);
+
+static struct attribute *hccs_chip_default_attrs[] = {
+ &all_linked_on_chip_attr.attr,
+ &linked_full_lane_on_chip_attr.attr,
+ &crc_err_cnt_sum_on_chip_attr.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(hccs_chip_default);
+
+static const struct kobj_type hccs_chip_type = {
+ .sysfs_ops = &hccs_comm_ops,
+ .default_groups = hccs_chip_default_groups,
+};
+
+static void hccs_remove_die_dir(struct hccs_die_info *die)
+{
+ struct hccs_port_info *port;
+ u8 i;
+
+ for (i = 0; i < die->port_num; i++) {
+ port = &die->ports[i];
+ if (port->dir_created)
+ kobject_put(&port->kobj);
+ }
+
+ kobject_put(&die->kobj);
+}
+
+static void hccs_remove_chip_dir(struct hccs_chip_info *chip)
+{
+ struct hccs_die_info *die;
+ u8 i;
+
+ for (i = 0; i < chip->die_num; i++) {
+ die = &chip->dies[i];
+ if (die->dir_created)
+ hccs_remove_die_dir(die);
+ }
+
+ kobject_put(&chip->kobj);
+}
+
+static void hccs_remove_topo_dirs(struct hccs_dev *hdev)
+{
+ u8 i;
+
+ for (i = 0; i < hdev->chip_num; i++)
+ hccs_remove_chip_dir(&hdev->chips[i]);
+}
+
+static int hccs_create_hccs_dir(struct hccs_dev *hdev,
+ struct hccs_die_info *die,
+ struct hccs_port_info *port)
+{
+ int ret;
+
+ ret = kobject_init_and_add(&port->kobj, &hccs_port_type,
+ &die->kobj, "hccs%d", port->port_id);
+ if (ret) {
+ kobject_put(&port->kobj);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int hccs_create_die_dir(struct hccs_dev *hdev,
+ struct hccs_chip_info *chip,
+ struct hccs_die_info *die)
+{
+ struct hccs_port_info *port;
+ int ret;
+ u16 i;
+
+ ret = kobject_init_and_add(&die->kobj, &hccs_die_type,
+ &chip->kobj, "die%d", die->die_id);
+ if (ret) {
+ kobject_put(&die->kobj);
+ return ret;
+ }
+
+ for (i = 0; i < die->port_num; i++) {
+ port = &die->ports[i];
+ ret = hccs_create_hccs_dir(hdev, die, port);
+ if (ret) {
+ dev_err(hdev->dev, "create hccs%d dir failed.\n",
+ port->port_id);
+ goto err;
+ }
+ port->dir_created = true;
+ }
+
+ return 0;
+err:
+ hccs_remove_die_dir(die);
+
+ return ret;
+}
+
+static int hccs_create_chip_dir(struct hccs_dev *hdev,
+ struct hccs_chip_info *chip)
+{
+ struct hccs_die_info *die;
+ int ret;
+ u16 id;
+
+ ret = kobject_init_and_add(&chip->kobj, &hccs_chip_type,
+ &hdev->dev->kobj, "chip%d", chip->chip_id);
+ if (ret) {
+ kobject_put(&chip->kobj);
+ return ret;
+ }
+
+ for (id = 0; id < chip->die_num; id++) {
+ die = &chip->dies[id];
+ ret = hccs_create_die_dir(hdev, chip, die);
+ if (ret)
+ goto err;
+ die->dir_created = true;
+ }
+
+ return 0;
+err:
+ hccs_remove_chip_dir(chip);
+
+ return ret;
+}
+
+static int hccs_create_topo_dirs(struct hccs_dev *hdev)
+{
+ struct hccs_chip_info *chip;
+ u8 id, k;
+ int ret;
+
+ for (id = 0; id < hdev->chip_num; id++) {
+ chip = &hdev->chips[id];
+ ret = hccs_create_chip_dir(hdev, chip);
+ if (ret) {
+ dev_err(hdev->dev, "init chip%d dir failed!\n", id);
+ goto err;
+ }
+ }
+
+ return 0;
+err:
+ for (k = 0; k < id; k++)
+ hccs_remove_chip_dir(&hdev->chips[k]);
+
+ return ret;
+}
+
+static int hccs_probe(struct platform_device *pdev)
+{
+ struct acpi_device *acpi_dev;
+ struct hccs_dev *hdev;
+ int rc;
+
+ if (acpi_disabled) {
+ dev_err(&pdev->dev, "acpi is disabled.\n");
+ return -ENODEV;
+ }
+ acpi_dev = ACPI_COMPANION(&pdev->dev);
+ if (!acpi_dev)
+ return -ENODEV;
+
+ hdev = devm_kzalloc(&pdev->dev, sizeof(*hdev), GFP_KERNEL);
+ if (!hdev)
+ return -ENOMEM;
+ hdev->acpi_dev = acpi_dev;
+ hdev->dev = &pdev->dev;
+ platform_set_drvdata(pdev, hdev);
+
+ mutex_init(&hdev->lock);
+ rc = hccs_get_pcc_chan_id(hdev);
+ if (rc)
+ return rc;
+ rc = hccs_register_pcc_channel(hdev);
+ if (rc)
+ return rc;
+
+ rc = hccs_get_dev_caps(hdev);
+ if (rc)
+ goto unregister_pcc_chan;
+
+ rc = hccs_get_hw_info(hdev);
+ if (rc)
+ goto unregister_pcc_chan;
+
+ rc = hccs_create_topo_dirs(hdev);
+ if (rc)
+ goto unregister_pcc_chan;
+
+ return 0;
+
+unregister_pcc_chan:
+ hccs_unregister_pcc_channel(hdev);
+
+ return rc;
+}
+
+static int 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 acpi_device_id hccs_acpi_match[] = {
+ { "HISI04B1"},
+ { ""},
+};
+MODULE_DEVICE_TABLE(acpi, hccs_acpi_match);
+
+static struct platform_driver hccs_driver = {
+ .probe = hccs_probe,
+ .remove = hccs_remove,
+ .driver = {
+ .name = "kunpeng_hccs",
+ .acpi_match_table = hccs_acpi_match,
+ },
+};
+
+module_platform_driver(hccs_driver);
+
+MODULE_DESCRIPTION("Kunpeng SoC HCCS driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Huisong Li <lihuisong@huawei.com>");
new file mode 100644
@@ -0,0 +1,196 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (c) 2023 Hisilicon Limited. */
+
+#ifndef __KUNPENG_HCCS_H__
+#define __KUNPENG_HCCS_H__
+
+/*
+ * |--------------- Chip0 ---------------|---------------- ChipN -------------|
+ * |--------Die0-------|--------DieN-------|--------Die0-------|-------DieN-------|
+ * | P0 | P1 | P2 | P3 | P0 | P1 | P2 | P3 | P0 | P1 | P2 | P3 |P0 | P1 | P2 | P3 |
+ */
+
+/*
+ * This value cannot be 255, otherwise the loop of the multi-BD communication
+ * case cannot end.
+ */
+#define HCCS_DIE_MAX_PORT_ID 254
+
+struct hccs_port_info {
+ u8 port_id;
+ u8 port_type;
+ u8 lane_mode;
+ bool enable; /* if the port is enabled */
+ struct kobject kobj;
+ bool dir_created;
+ struct hccs_die_info *die; /* point to the die the port is located */
+};
+
+struct hccs_die_info {
+ u8 die_id;
+ u8 port_num;
+ u8 min_port_id;
+ u8 max_port_id;
+ struct hccs_port_info *ports;
+ struct kobject kobj;
+ bool dir_created;
+ struct hccs_chip_info *chip; /* point to the chip the die is located */
+};
+
+struct hccs_chip_info {
+ u8 chip_id;
+ u8 die_num;
+ struct hccs_die_info *dies;
+ struct kobject kobj;
+ struct hccs_dev *hdev;
+};
+
+struct hccs_mbox_client_info {
+ struct mbox_client client;
+ struct mbox_chan *mbox_chan;
+ struct pcc_mbox_chan *pcc_chan;
+ u64 deadline_us;
+ void *pcc_comm_addr;
+};
+
+struct hccs_dev {
+ struct device *dev;
+ struct acpi_device *acpi_dev;
+ u64 caps;
+ u8 chip_num;
+ struct hccs_chip_info *chips;
+ u8 chan_id;
+ struct mutex lock;
+ struct hccs_mbox_client_info cl_info;
+};
+
+#define HCCS_SERDES_MODULE_CODE 0x32
+enum hccs_subcmd_type {
+ HCCS_GET_CHIP_NUM = 0x1,
+ HCCS_GET_DIE_NUM,
+ HCCS_GET_DIE_INFO,
+ HCCS_GET_DIE_PORT_INFO,
+ HCCS_GET_DEV_CAP,
+ HCCS_GET_PORT_LINK_STATUS,
+ HCCS_GET_PORT_CRC_ERR_CNT,
+ HCCS_GET_DIE_PORTS_LANE_STA,
+ HCCS_GET_DIE_PORTS_LINK_STA,
+ HCCS_GET_DIE_PORTS_CRC_ERR_CNT,
+ HCCS_SUB_CMD_MAX = 255,
+};
+
+struct hccs_die_num_req_param {
+ u8 chip_id;
+};
+
+struct hccs_die_info_req_param {
+ u8 chip_id;
+ u8 die_idx;
+};
+
+struct hccs_die_info_rsp_data {
+ u8 die_id;
+ u8 port_num;
+ u8 min_port_id;
+ u8 max_port_id;
+};
+
+struct hccs_port_attr {
+ u8 port_id;
+ u8 port_type;
+ u8 lane_mode;
+ u8 enable : 1; /* if the port is enabled */
+ u16 rsv[2];
+};
+
+/*
+ * The common command request for getting the all information of HCCS port on
+ * specified DIE.
+ */
+struct hccs_die_comm_req_param {
+ u8 chip_id;
+ u8 die_id; /* id in hardware */
+};
+
+/* The common command request for getting the information of a specific port */
+struct hccs_port_comm_req_param {
+ u8 chip_id;
+ u8 die_id;
+ u8 port_id;
+};
+
+#define HCCS_PORT_RESET 1
+#define HCCS_PORT_SETUP 2
+#define HCCS_PORT_CONFIG 3
+#define HCCS_PORT_READY 4
+struct hccs_link_status {
+ u8 lane_mask; /* indicate which lanes are used. */
+ u8 link_fsm : 3; /* link fsm, 1: reset 2: setup 3: config 4: link-up */
+ u8 lane_num : 5; /* current lane number */
+};
+
+struct hccs_req_head {
+ u8 module_code; /* set to 0x32 for serdes */
+ u8 start_id;
+ u8 rsv[2];
+};
+
+struct hccs_rsp_head {
+ u8 data_len;
+ u8 next_id;
+ u8 rsv[2];
+};
+
+struct hccs_fw_inner_head {
+ u8 retStatus; /* 0: success, other: failure */
+ u8 rsv[7];
+};
+
+#define HCCS_PCC_SHARE_MEM_BYTES 64
+#define HCCS_FW_INNER_HEAD_BYTES 8
+#define HCCS_RSP_HEAD_BYTES 4
+
+#define HCCS_MAX_RSP_DATA_BYTES (HCCS_PCC_SHARE_MEM_BYTES - \
+ HCCS_FW_INNER_HEAD_BYTES - \
+ HCCS_RSP_HEAD_BYTES)
+#define HCCS_MAX_RSP_DATA_SIZE_MAX (HCCS_MAX_RSP_DATA_BYTES / 4)
+
+/*
+ * Note: Actual available size of data field also depands on the PCC header
+ * bytes of the specific type. Driver needs to copy the response data in the
+ * communication space based on the real length.
+ */
+struct hccs_rsp_desc {
+ struct hccs_fw_inner_head fw_inner_head; /* 8 Bytes */
+ struct hccs_rsp_head rsp_head; /* 4 Bytes */
+ u32 data[HCCS_MAX_RSP_DATA_SIZE_MAX];
+};
+
+#define HCCS_REQ_HEAD_BYTES 4
+#define HCCS_MAX_REQ_DATA_BYTES (HCCS_PCC_SHARE_MEM_BYTES - \
+ HCCS_REQ_HEAD_BYTES)
+#define HCCS_MAX_REQ_DATA_SIZE_MAX (HCCS_MAX_REQ_DATA_BYTES / 4)
+
+/*
+ * Note: Actual available size of data field also depands on the PCC header
+ * bytes of the specific type. Driver needs to copy the request data to the
+ * communication space based on the real length.
+ */
+struct hccs_req_desc {
+ struct hccs_req_head req_head; /* 4 Bytes */
+ u32 data[HCCS_MAX_REQ_DATA_SIZE_MAX];
+};
+
+struct hccs_desc {
+ union {
+ struct hccs_req_desc req;
+ struct hccs_rsp_desc rsp;
+ };
+};
+
+#define hccs_get_field(origin, mask, shift) \
+ (((origin) & (mask)) >> (shift))
+#define hccs_get_bit(origin, shift) \
+ hccs_get_field((origin), (0x1UL << (shift)), (shift))
+
+#endif /* __KUNPENG_HCCS_H__ */
The Huawei Cache Coherence System (HCCS) is a multi-chip interconnection bus protocol. The performance of the application may be affected if some hccs ports on platform are not in full lane status, have a large number of CRC errors and so on. This driver provides the query interface of the health status and port information of HCCS on Kunpeng SoC. Signed-off-by: Huisong Li <lihuisong@huawei.com> --- MAINTAINERS | 6 + drivers/soc/Kconfig | 1 + drivers/soc/Makefile | 1 + drivers/soc/hisilicon/Kconfig | 20 + drivers/soc/hisilicon/Makefile | 2 + drivers/soc/hisilicon/kunpeng_hccs.c | 1282 ++++++++++++++++++++++++++ drivers/soc/hisilicon/kunpeng_hccs.h | 196 ++++ 7 files changed, 1508 insertions(+) create mode 100644 drivers/soc/hisilicon/Kconfig create mode 100644 drivers/soc/hisilicon/Makefile create mode 100644 drivers/soc/hisilicon/kunpeng_hccs.c create mode 100644 drivers/soc/hisilicon/kunpeng_hccs.h