[PATCH 3/5] soc: hisilicon: kunpeng_hccs: add used HCCS type sysfs on platform

Huisong Li
2024-07-18T07:20:49Z

This patch add the sysfs to show all HCCS type used on platform.

Signed-off-by: Huisong Li <lihuisong@huawei.com>
---
drivers/soc/hisilicon/kunpeng_hccs.c | 106 ++++++++++++++++++++++++++-
drivers/soc/hisilicon/kunpeng_hccs.h | 15 ++++
2 files changed, 120 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/hisilicon/kunpeng_hccs.c b/drivers/soc/hisilicon/kunpeng_hccs.c
index 6e88f597f267..2d68ec49e1d6 100644
--- a/drivers/soc/hisilicon/kunpeng_hccs.c
+++ b/drivers/soc/hisilicon/kunpeng_hccs.c
@@ -21,11 +21,14 @@
* - if all enabled ports are in linked
* - if all linked ports are in full lane
* - CRC error count sum
+ *
+ * - Retrieve all used HCCS types on platform.
*/
#include <linux/acpi.h>
#include <linux/iopoll.h>
#include <linux/platform_device.h>
#include <linux/sysfs.h>
+#include <linux/types.h>

#include <acpi/pcc.h>

@@ -53,6 +56,15 @@ 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);
+}
+
struct hccs_register_ctx {
struct device *dev;
u8 chan_id;
@@ -664,6 +676,59 @@ 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 (i = 0; i <= HCCS_IP_MAX; i++) {
+ if (test_bit(i, hccs_ver))
+ 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;
+ u32 map_size;
+ u16 idx = 0;
+
+ hdev->used_type_num = hccs_calc_used_type_num(hdev, hccs_ver);
+ map_size = sizeof(struct hccs_type_name_map) * hdev->used_type_num;
+ hdev->type_name_maps = devm_kzalloc(hdev->dev, map_size, GFP_KERNEL);
+ if (!hdev->type_name_maps)
+ return -ENOMEM;
+
+ for (i = 0; i <= HCCS_IP_MAX; i++) {
+ if (test_bit(i, hccs_ver)) {
+ hdev->type_name_maps[idx].type = i;
+ sprintf(hdev->type_name_maps[idx].name,
+ HCCS_IP_PREFIX "%u", 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)
@@ -824,7 +889,7 @@ 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, HCCS_IP_PREFIX "%u\n", port->port_type);
}
static struct kobj_attribute hccs_type_attr = __ATTR_RO(type);

@@ -1128,6 +1193,33 @@ static const struct kobj_type hccs_chip_type = {
.default_groups = hccs_chip_default_groups,
};

+
+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(&buf[len], "%s ", hdev->type_name_maps[i].name);
+ len += sysfs_emit(&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);
+}
+
+static int hccs_add_misc_sysfs(struct hccs_dev *hdev)
+{
+ return sysfs_create_file(&hdev->dev->kobj, &used_types_attr.attr);
+}
+
static void hccs_remove_die_dir(struct hccs_die_info *die)
{
struct hccs_port_info *port;
@@ -1162,6 +1254,8 @@ 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,
@@ -1257,6 +1351,12 @@ static int hccs_create_topo_dirs(struct hccs_dev *hdev)
}
}

+ ret = hccs_add_misc_sysfs(hdev);
+ if (ret) {
+ dev_err(hdev->dev, "create global sysfs interface failed, ret = %d\n", ret);
+ goto err;
+ }
+
return 0;
err:
for (k = 0; k < id; k++)
@@ -1307,6 +1407,10 @@ 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;
diff --git a/drivers/soc/hisilicon/kunpeng_hccs.h b/drivers/soc/hisilicon/kunpeng_hccs.h
index c3adbc01b471..fe8b4089a9c7 100644
--- a/drivers/soc/hisilicon/kunpeng_hccs.h
+++ b/drivers/soc/hisilicon/kunpeng_hccs.h
@@ -10,6 +10,19 @@
* | P0 | P1 | P2 | P3 | P0 | P1 | P2 | P3 | P0 | P1 | P2 | P3 |P0 | P1 | P2 | P3 |
*/

+enum hccs_port_type {
+ HCCS_V1 = 1,
+ HCCS_V2,
+};
+
+#define HCCS_IP_PREFIX "HCCS-v"
+#define HCCS_IP_MAX 255
+#define HCCS_NAME_MAX_LEN 9
+struct hccs_type_name_map {
+ u8 type;
+ char name[HCCS_NAME_MAX_LEN + 1];
+};
+
/*
* This value cannot be 255, otherwise the loop of the multi-BD communication
* case cannot end.
@@ -74,6 +87,8 @@ struct hccs_dev {
u64 caps;
u8 chip_num;
struct hccs_chip_info *chips;
+ u16 used_type_num;
+ struct hccs_type_name_map *type_name_maps;
u8 chan_id;
struct mutex lock;
struct hccs_mbox_client_info cl_info;
--
2.22.0