Move out of device_add_group() variants, instead assign static array of
attribute groups to .dev_groups in platform_driver structure.
Then use is_visible to enable only the necessary files on the platform.
.read() and .is_bin_visibile() have slightly different
implemetations on ACPI and non-ACPI system, so move them
to respective files.
Signed-off-by: Suma Hegde <suma.hegde@xxxxxxx>
Reviewed-by: Naveen Krishna Chatradhi <naveenkrishna.chatradhi@xxxxxxx>
---
Changes since v7:
hsmp_get_tbl_dram_base() is exported as a module symbol.
Changes since v6:
1. Move common code of hsmp_metric_tbl_read() of plat.c and acpi.c to
hsmp.c with the same function name.
2. Rename hsmp_metric_tbl_read() to hsmp_metric_tbl_plat_read() and
hsmp_metric_tbl_acpi_read() in plat.c acpi.c respectively.
3. Add tabe space in macros definition in plat.c
4. Keep only one cast for sock_ind.
Changes since v5:
Assign integer directly to .private.
Changes since v4:
Change ->private from string pointer to u16 pointer.
Changes since v3:
This patch and next patch(9th and 10th patch in v3 series) are merged
and commit description is updated.
Changes since v2:
None
Changes since v1:
1. Change is_visible to is_bin_visible in commit message
1. Add parenthesis around read and is_bin_visible in commit message
2. Change plat_dev to hsmp_pdev, hsmp_device to mdev
3. Remove unnecessary if, else conditions in hsmp_is_sock_attr_visible
4. Change un cached to un-cached
drivers/platform/x86/amd/hsmp/acpi.c | 65 ++++++++++-----
drivers/platform/x86/amd/hsmp/hsmp.c | 67 ++--------------
drivers/platform/x86/amd/hsmp/hsmp.h | 9 +--
drivers/platform/x86/amd/hsmp/plat.c | 113 +++++++++++++++++++++------
4 files changed, 141 insertions(+), 113 deletions(-)
diff --git a/drivers/platform/x86/amd/hsmp/acpi.c b/drivers/platform/x86/amd/hsmp/acpi.c
index 53deee86f456..9435e40bbf25 100644
--- a/drivers/platform/x86/amd/hsmp/acpi.c
+++ b/drivers/platform/x86/amd/hsmp/acpi.c
@@ -9,6 +9,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <asm/amd_hsmp.h>
#include <asm/amd_nb.h>
#include <linux/acpi.h>
@@ -211,6 +212,8 @@ static int hsmp_parse_acpi_table(struct device *dev, u16 sock_ind)
sema_init(&sock->hsmp_sem, 1);
+ dev_set_drvdata(dev, sock);
+
/* Read MP1 base address from CRS method */
ret = hsmp_read_acpi_crs(sock);
if (ret)
@@ -220,27 +223,23 @@ static int hsmp_parse_acpi_table(struct device *dev, u16 sock_ind)
return hsmp_read_acpi_dsd(sock);
}
-static int hsmp_create_acpi_sysfs_if(struct device *dev)
+static ssize_t hsmp_metric_tbl_acpi_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buf,
+ loff_t off, size_t count)
{
- struct attribute_group *attr_grp;
- u16 sock_ind;
- int ret;
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct hsmp_socket *sock = dev_get_drvdata(dev);
- attr_grp = devm_kzalloc(dev, sizeof(struct attribute_group), GFP_KERNEL);
- if (!attr_grp)
- return -ENOMEM;
-
- attr_grp->is_bin_visible = hsmp_is_sock_attr_visible;
-
- ret = hsmp_get_uid(dev, &sock_ind);
- if (ret)
- return ret;
+ return hsmp_metric_tbl_read(sock, buf, count);
+}
- ret = hsmp_create_attr_list(attr_grp, dev, sock_ind);
- if (ret)
- return ret;
+static umode_t hsmp_is_sock_attr_visible(struct kobject *kobj,
+ struct bin_attribute *battr, int id)
+{
+ if (hsmp_pdev.proto_ver == HSMP_PROTO_VER6)
+ return battr->attr.mode;
- return devm_device_add_group(dev, attr_grp);
+ return 0;
}
static int init_acpi(struct device *dev)
@@ -275,9 +274,36 @@ static int init_acpi(struct device *dev)
return ret;
}
+ if (hsmp_pdev.proto_ver == HSMP_PROTO_VER6) {
+ ret = hsmp_get_tbl_dram_base(sock_ind);
+ if (ret)
+ dev_err(dev, "Failed to init metric table\n");
+ }
+
return ret;
}
+static struct bin_attribute hsmp_metric_tbl_attr = {
+ .attr = { .name = HSMP_METRICS_TABLE_NAME, .mode = 0444},
+ .read = hsmp_metric_tbl_acpi_read,
+ .size = sizeof(struct hsmp_metric_table),
+};
+
+static struct bin_attribute *hsmp_attr_list[] = {
+ &hsmp_metric_tbl_attr,
+ NULL
+};
+
+static struct attribute_group hsmp_attr_grp = {
+ .bin_attrs = hsmp_attr_list,
+ .is_bin_visible = hsmp_is_sock_attr_visible,
+};
+
+static const struct attribute_group *hsmp_groups[] = {
+ &hsmp_attr_grp,
+ NULL
+};
+
static const struct acpi_device_id amd_hsmp_acpi_ids[] = {
{ACPI_HSMP_DEVICE_HID, 0},
{}
@@ -306,10 +332,6 @@ static int hsmp_acpi_probe(struct platform_device *pdev)
return ret;
}
- ret = hsmp_create_acpi_sysfs_if(&pdev->dev);
- if (ret)
- dev_err(&pdev->dev, "Failed to create HSMP sysfs interface\n");
-
if (!hsmp_pdev.is_probed) {
ret = hsmp_misc_register(&pdev->dev);
if (ret)
@@ -338,6 +360,7 @@ static struct platform_driver amd_hsmp_driver = {
.driver = {
.name = DRIVER_NAME,
.acpi_match_table = amd_hsmp_acpi_ids,
+ .dev_groups = hsmp_groups,
},
};
diff --git a/drivers/platform/x86/amd/hsmp/hsmp.c b/drivers/platform/x86/amd/hsmp/hsmp.c
index 6fd08f16933a..7c3fb090684f 100644
--- a/drivers/platform/x86/amd/hsmp/hsmp.c
+++ b/drivers/platform/x86/amd/hsmp/hsmp.c
@@ -282,19 +282,16 @@ long hsmp_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
return 0;
}
-ssize_t hsmp_metric_tbl_read(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr, char *buf,
- loff_t off, size_t count)
+ssize_t hsmp_metric_tbl_read(struct hsmp_socket *sock, char *buf, size_t size)
{
- struct hsmp_socket *sock = bin_attr->private;
struct hsmp_message msg = { 0 };
int ret;
- if (!sock)
+ if (!sock || !buf)
return -EINVAL;
- /* Do not support lseek(), reads entire metric table */
- if (count < bin_attr->size) {
+ /* Do not support lseek(), also don't allow more than the size of metric table */
+ if (size != sizeof(struct hsmp_metric_table)) {
dev_err(sock->dev, "Wrong buffer size\n");
return -EINVAL;
}
@@ -305,13 +302,13 @@ ssize_t hsmp_metric_tbl_read(struct file *filp, struct kobject *kobj,
ret = hsmp_send_message(&msg);
if (ret)
return ret;
- memcpy_fromio(buf, sock->metric_tbl_addr, bin_attr->size);
+ memcpy_fromio(buf, sock->metric_tbl_addr, size);
- return bin_attr->size;
+ return size;
}
EXPORT_SYMBOL_NS_GPL(hsmp_metric_tbl_read, AMD_HSMP);
-static int hsmp_get_tbl_dram_base(u16 sock_ind)
+int hsmp_get_tbl_dram_base(u16 sock_ind)
{
struct hsmp_socket *sock = &hsmp_pdev.sock[sock_ind];
struct hsmp_message msg = { 0 };
@@ -343,55 +340,7 @@ static int hsmp_get_tbl_dram_base(u16 sock_ind)
}
return 0;
}
-
-umode_t hsmp_is_sock_attr_visible(struct kobject *kobj,
- struct bin_attribute *battr, int id)
-{
- if (hsmp_pdev.proto_ver == HSMP_PROTO_VER6)
- return battr->attr.mode;
- else
- return 0;
-}
-EXPORT_SYMBOL_NS_GPL(hsmp_is_sock_attr_visible, AMD_HSMP);
-
-static int hsmp_init_metric_tbl_bin_attr(struct bin_attribute **hattrs, u16 sock_ind)
-{
- struct bin_attribute *hattr = &hsmp_pdev.sock[sock_ind].hsmp_attr;
-
- sysfs_bin_attr_init(hattr);
- hattr->attr.name = HSMP_METRICS_TABLE_NAME;
- hattr->attr.mode = 0444;
- hattr->read = hsmp_metric_tbl_read;
- hattr->size = sizeof(struct hsmp_metric_table);
- hattr->private = &hsmp_pdev.sock[sock_ind];
- hattrs[0] = hattr;
-
- if (hsmp_pdev.proto_ver == HSMP_PROTO_VER6)
- return hsmp_get_tbl_dram_base(sock_ind);
- else
- return 0;
-}
-
-/* One bin sysfs for metrics table */
-#define NUM_HSMP_ATTRS 1
-
-int hsmp_create_attr_list(struct attribute_group *attr_grp,
- struct device *dev, u16 sock_ind)
-{
- struct bin_attribute **hsmp_bin_attrs;
-
- /* Null terminated list of attributes */
- hsmp_bin_attrs = devm_kcalloc(dev, NUM_HSMP_ATTRS + 1,
- sizeof(*hsmp_bin_attrs),
- GFP_KERNEL);
- if (!hsmp_bin_attrs)
- return -ENOMEM;
-
- attr_grp->bin_attrs = hsmp_bin_attrs;
-
- return hsmp_init_metric_tbl_bin_attr(hsmp_bin_attrs, sock_ind);
-}
-EXPORT_SYMBOL_NS_GPL(hsmp_create_attr_list, AMD_HSMP);
+EXPORT_SYMBOL_NS_GPL(hsmp_get_tbl_dram_base, AMD_HSMP);
int hsmp_cache_proto_ver(u16 sock_ind)
{
diff --git a/drivers/platform/x86/amd/hsmp/hsmp.h b/drivers/platform/x86/amd/hsmp/hsmp.h
index 9ab50bc74676..9b4ab6a3598c 100644
--- a/drivers/platform/x86/amd/hsmp/hsmp.h
+++ b/drivers/platform/x86/amd/hsmp/hsmp.h
@@ -57,16 +57,11 @@ struct hsmp_plat_device {
extern struct hsmp_plat_device hsmp_pdev;
-ssize_t hsmp_metric_tbl_read(struct file *filp, struct kobject *kobj,
- struct bin_attribute *bin_attr, char *buf,
- loff_t off, size_t count);
int hsmp_cache_proto_ver(u16 sock_ind);
-umode_t hsmp_is_sock_attr_visible(struct kobject *kobj,
- struct bin_attribute *battr, int id);
-int hsmp_create_attr_list(struct attribute_group *attr_grp,
- struct device *dev, u16 sock_ind);
int hsmp_test(u16 sock_ind, u32 value);
long hsmp_ioctl(struct file *fp, unsigned int cmd, unsigned long arg);
void hsmp_misc_deregister(void);
int hsmp_misc_register(struct device *dev);
+int hsmp_get_tbl_dram_base(u16 sock_ind);
+ssize_t hsmp_metric_tbl_read(struct hsmp_socket *sock, char *buf, size_t size);
#endif /* HSMP_H */
diff --git a/drivers/platform/x86/amd/hsmp/plat.c b/drivers/platform/x86/amd/hsmp/plat.c
index 0c34312d1a50..c1ddd8957f19 100644
--- a/drivers/platform/x86/amd/hsmp/plat.c
+++ b/drivers/platform/x86/amd/hsmp/plat.c
@@ -9,6 +9,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <asm/amd_hsmp.h>
#include <asm/amd_nb.h>
#include <linux/device.h>
@@ -61,36 +62,93 @@ static const struct file_operations hsmp_fops = {
.compat_ioctl = hsmp_ioctl,
};
-static int hsmp_create_non_acpi_sysfs_if(struct device *dev)
+static ssize_t hsmp_metric_tbl_plat_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *bin_attr, char *buf,
+ loff_t off, size_t count)
{
- const struct attribute_group **hsmp_attr_grps;
- struct attribute_group *attr_grp;
- u16 i;
+ struct hsmp_socket *sock;
+ u16 sock_ind;
- hsmp_attr_grps = devm_kcalloc(dev, hsmp_pdev.num_sockets + 1,
- sizeof(*hsmp_attr_grps),
- GFP_KERNEL);
- if (!hsmp_attr_grps)
- return -ENOMEM;
+ sock_ind = (uintptr_t)bin_attr->private;
+ if (sock_ind >= hsmp_pdev.num_sockets)
+ return -EINVAL;
- /* Create a sysfs directory for each socket */
- for (i = 0; i < hsmp_pdev.num_sockets; i++) {
- attr_grp = devm_kzalloc(dev, sizeof(struct attribute_group),
- GFP_KERNEL);
- if (!attr_grp)
- return -ENOMEM;
+ sock = &hsmp_pdev.sock[sock_ind];
- snprintf(hsmp_pdev.sock[i].name, HSMP_ATTR_GRP_NAME_SIZE, "socket%u", (u8)i);
- attr_grp->name = hsmp_pdev.sock[i].name;
- attr_grp->is_bin_visible = hsmp_is_sock_attr_visible;
- hsmp_attr_grps[i] = attr_grp;
+ return hsmp_metric_tbl_read(sock, buf, count);
+}
- hsmp_create_attr_list(attr_grp, dev, i);
- }
+static umode_t hsmp_is_sock_attr_visible(struct kobject *kobj,
+ struct bin_attribute *battr, int id)
+{
+ u16 sock_ind;
+
+ sock_ind = (uintptr_t)battr->private;
+
+ if (id == 0 && sock_ind >= hsmp_pdev.num_sockets)
+ return SYSFS_GROUP_INVISIBLE;
- return device_add_groups(dev, hsmp_attr_grps);
+ if (hsmp_pdev.proto_ver == HSMP_PROTO_VER6)
+ return battr->attr.mode;
+
+ return 0;
}
+/*
+ * AMD supports maximum of 8 sockets in a system.
+ * Static array of 8 + 1(for NULL) elements is created below
+ * to create sysfs groups for sockets.
+ * is_bin_visible function is used to show / hide the necessary groups.
+ */
+#define HSMP_BIN_ATTR(index, _list) \
+static struct bin_attribute attr##index = { \
+ .attr = { .name = HSMP_METRICS_TABLE_NAME, .mode = 0444}, \
+ .private = (void *)index, \
+ .read = hsmp_metric_tbl_plat_read, \
+ .size = sizeof(struct hsmp_metric_table), \
+}; \
+static struct bin_attribute _list[] = { \
+ &attr##index, \
+ NULL \
+}
+
+HSMP_BIN_ATTR(0, *sock0_attr_list);
+HSMP_BIN_ATTR(1, *sock1_attr_list);
+HSMP_BIN_ATTR(2, *sock2_attr_list);
+HSMP_BIN_ATTR(3, *sock3_attr_list);
+HSMP_BIN_ATTR(4, *sock4_attr_list);
+HSMP_BIN_ATTR(5, *sock5_attr_list);
+HSMP_BIN_ATTR(6, *sock6_attr_list);
+HSMP_BIN_ATTR(7, *sock7_attr_list);
+
+#define HSMP_BIN_ATTR_GRP(index, _list, _name) \
+static struct attribute_group sock##index##_attr_grp = { \
+ .bin_attrs = _list, \
+ .is_bin_visible = hsmp_is_sock_attr_visible, \
+ .name = #_name, \
+}
+
+HSMP_BIN_ATTR_GRP(0, sock0_attr_list, socket0);
+HSMP_BIN_ATTR_GRP(1, sock1_attr_list, socket1);
+HSMP_BIN_ATTR_GRP(2, sock2_attr_list, socket2);
+HSMP_BIN_ATTR_GRP(3, sock3_attr_list, socket3);
+HSMP_BIN_ATTR_GRP(4, sock4_attr_list, socket4);
+HSMP_BIN_ATTR_GRP(5, sock5_attr_list, socket5);
+HSMP_BIN_ATTR_GRP(6, sock6_attr_list, socket6);
+HSMP_BIN_ATTR_GRP(7, sock7_attr_list, socket7);
+
+static const struct attribute_group *hsmp_groups[] = {
+ &sock0_attr_grp,
+ &sock1_attr_grp,
+ &sock2_attr_grp,
+ &sock3_attr_grp,
+ &sock4_attr_grp,
+ &sock5_attr_grp,
+ &sock6_attr_grp,
+ &sock7_attr_grp,
+ NULL
+};
+
static inline bool is_f1a_m0h(void)
{
if (boot_cpu_data.x86 == 0x1A && boot_cpu_data.x86_model <= 0x0F)
@@ -141,6 +199,12 @@ static int init_platform_device(struct device *dev)
dev_err(dev, "Failed to read HSMP protocol version\n");
return ret;
}
+
+ if (hsmp_pdev.proto_ver == HSMP_PROTO_VER6) {
+ ret = hsmp_get_tbl_dram_base(i);
+ if (ret)
+ dev_err(dev, "Failed to init metric table\n");
+ }
}
return 0;
@@ -162,10 +226,6 @@ static int hsmp_pltdrv_probe(struct platform_device *pdev)
return ret;
}
- ret = hsmp_create_non_acpi_sysfs_if(&pdev->dev);
- if (ret)
- dev_err(&pdev->dev, "Failed to create HSMP sysfs interface\n");
-
return hsmp_misc_register(&pdev->dev);
}
@@ -179,6 +239,7 @@ static struct platform_driver amd_hsmp_driver = {
.remove_new = hsmp_pltdrv_remove,
.driver = {
.name = DRIVER_NAME,
+ .dev_groups = hsmp_groups,
},
};
--
2.25.1
