@@ -5,4 +5,4 @@
#
obj-$(CONFIG_AMD_HSMP) += amd_hsmp.o
-amd_hsmp-objs := hsmp.o plat.o
+amd_hsmp-objs := hsmp.o plat.o acpi.o
new file mode 100644
@@ -0,0 +1,261 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AMD HSMP Platform Driver
+ * Copyright (c) 2024, AMD.
+ * All Rights Reserved.
+ *
+ * This file provides a device implementation for HSMP interface
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include "hsmp.h"
+
+#include <linux/acpi.h>
+
+/* These are the strings specified in ACPI table */
+#define MSG_IDOFF_STR "MsgIdOffset"
+#define MSG_ARGOFF_STR "MsgArgOffset"
+#define MSG_RESPOFF_STR "MsgRspOffset"
+
+void amd_hsmp_acpi_rdwr(struct hsmp_socket *sock, u32 offset,
+ u32 *value, bool write)
+{
+ if (write)
+ iowrite32(*value, sock->virt_base_addr + offset);
+ else
+ *value = ioread32(sock->virt_base_addr + offset);
+}
+
+/* This is the UUID used for HSMP */
+static const guid_t acpi_hsmp_uuid = GUID_INIT(0xb74d619d, 0x5707, 0x48bd,
+ 0xa6, 0x9f, 0x4e, 0xa2,
+ 0x87, 0x1f, 0xc2, 0xf6);
+
+static inline bool is_acpi_hsmp_uuid(union acpi_object *obj)
+{
+ if (obj->type == ACPI_TYPE_BUFFER && obj->buffer.length == UUID_SIZE)
+ return guid_equal((guid_t *)obj->buffer.pointer, &acpi_hsmp_uuid);
+
+ return false;
+}
+
+static inline int hsmp_get_uid(struct device *dev, u16 *sock_ind)
+{
+ char *uid;
+
+ /*
+ * UID (ID00, ID01..IDXX) is used for differentiating sockets,
+ * read it and strip the "ID" part of it and convert the remaining
+ * bytes to integer.
+ */
+ uid = acpi_device_uid(ACPI_COMPANION(dev));
+
+ return kstrtou16(uid + 2, 10, sock_ind);
+}
+
+static acpi_status hsmp_resource(struct acpi_resource *res, void *data)
+{
+ struct hsmp_socket *sock = data;
+ struct resource r;
+
+ switch (res->type) {
+ case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+ if (!acpi_dev_resource_memory(res, &r))
+ return AE_ERROR;
+ if (!r.start || r.end < r.start || !(r.flags & IORESOURCE_MEM_WRITEABLE))
+ return AE_ERROR;
+ sock->mbinfo.base_addr = r.start;
+ sock->mbinfo.size = resource_size(&r);
+ break;
+ case ACPI_RESOURCE_TYPE_END_TAG:
+ break;
+ default:
+ return AE_ERROR;
+ }
+
+ return AE_OK;
+}
+
+static int hsmp_read_acpi_dsd(struct hsmp_socket *sock)
+{
+ struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *guid, *mailbox_package;
+ union acpi_object *dsd;
+ acpi_status status;
+ int ret = 0;
+ int j;
+
+ status = acpi_evaluate_object_typed(ACPI_HANDLE(sock->dev), "_DSD", NULL,
+ &buf, ACPI_TYPE_PACKAGE);
+ if (ACPI_FAILURE(status)) {
+ dev_err(sock->dev, "Failed to read mailbox reg offsets from DSD table, err: %s\n",
+ acpi_format_exception(status));
+ return -ENODEV;
+ }
+
+ dsd = buf.pointer;
+
+ /* HSMP _DSD property should contain 2 objects.
+ * 1. guid which is an acpi object of type ACPI_TYPE_BUFFER
+ * 2. mailbox which is an acpi object of type ACPI_TYPE_PACKAGE
+ * This mailbox object contains 3 more acpi objects of type
+ * ACPI_TYPE_PACKAGE for holding msgid, msgresp, msgarg offsets
+ * these packages inturn contain 2 acpi objects of type
+ * ACPI_TYPE_STRING and ACPI_TYPE_INTEGER
+ */
+ if (!dsd || dsd->type != ACPI_TYPE_PACKAGE || dsd->package.count != 2) {
+ ret = -EINVAL;
+ goto free_buf;
+ }
+
+ guid = &dsd->package.elements[0];
+ mailbox_package = &dsd->package.elements[1];
+ if (!is_acpi_hsmp_uuid(guid) || mailbox_package->type != ACPI_TYPE_PACKAGE) {
+ dev_err(sock->dev, "Invalid hsmp _DSD table data\n");
+ ret = -EINVAL;
+ goto free_buf;
+ }
+
+ for (j = 0; j < mailbox_package->package.count; j++) {
+ union acpi_object *msgobj, *msgstr, *msgint;
+
+ msgobj = &mailbox_package->package.elements[j];
+ msgstr = &msgobj->package.elements[0];
+ msgint = &msgobj->package.elements[1];
+
+ /* package should have 1 string and 1 integer object */
+ if (msgobj->type != ACPI_TYPE_PACKAGE ||
+ msgstr->type != ACPI_TYPE_STRING ||
+ msgint->type != ACPI_TYPE_INTEGER) {
+ ret = -EINVAL;
+ goto free_buf;
+ }
+
+ if (!strncmp(msgstr->string.pointer, MSG_IDOFF_STR,
+ msgstr->string.length)) {
+ sock->mbinfo.msg_id_off = msgint->integer.value;
+ } else if (!strncmp(msgstr->string.pointer, MSG_RESPOFF_STR,
+ msgstr->string.length)) {
+ sock->mbinfo.msg_resp_off = msgint->integer.value;
+ } else if (!strncmp(msgstr->string.pointer, MSG_ARGOFF_STR,
+ msgstr->string.length)) {
+ sock->mbinfo.msg_arg_off = msgint->integer.value;
+ } else {
+ ret = -ENOENT;
+ goto free_buf;
+ }
+ }
+
+ if (!sock->mbinfo.msg_id_off || !sock->mbinfo.msg_resp_off ||
+ !sock->mbinfo.msg_arg_off)
+ ret = -EINVAL;
+
+free_buf:
+ ACPI_FREE(buf.pointer);
+ return ret;
+}
+
+static int hsmp_read_acpi_crs(struct hsmp_socket *sock)
+{
+ acpi_status status;
+
+ status = acpi_walk_resources(ACPI_HANDLE(sock->dev), METHOD_NAME__CRS,
+ hsmp_resource, sock);
+ if (ACPI_FAILURE(status)) {
+ dev_err(sock->dev, "Failed to look up MP1 base address from CRS method, err: %s\n",
+ acpi_format_exception(status));
+ return -EINVAL;
+ }
+ if (!sock->mbinfo.base_addr || !sock->mbinfo.size)
+ return -EINVAL;
+
+ /* The mapped region should be un cached */
+ sock->virt_base_addr = devm_ioremap_uc(sock->dev, sock->mbinfo.base_addr,
+ sock->mbinfo.size);
+ if (!sock->virt_base_addr) {
+ dev_err(sock->dev, "Failed to ioremap MP1 base address\n");
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+/* Parse the ACPI table to read the data */
+static int hsmp_parse_acpi_table(struct device *dev, u16 sock_ind)
+{
+ struct hsmp_socket *sock = &plat_dev.sock[sock_ind];
+ int ret;
+
+ sock->sock_ind = sock_ind;
+ sock->dev = dev;
+ plat_dev.is_acpi_device = true;
+
+ sema_init(&sock->hsmp_sem, 1);
+
+ /* Read MP1 base address from CRS method */
+ ret = hsmp_read_acpi_crs(sock);
+ if (ret)
+ return ret;
+
+ /* Read mailbox offsets from DSD table */
+ return hsmp_read_acpi_dsd(sock);
+}
+
+int hsmp_create_acpi_sysfs_if(struct device *dev)
+{
+ struct attribute_group *attr_grp;
+ u16 sock_ind;
+ int ret;
+
+ 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;
+
+ ret = hsmp_create_attr_list(attr_grp, dev, sock_ind);
+ if (ret)
+ return ret;
+
+ return devm_device_add_group(dev, attr_grp);
+}
+
+int init_acpi(struct device *dev)
+{
+ u16 sock_ind;
+ int ret;
+
+ ret = hsmp_get_uid(dev, &sock_ind);
+ if (ret)
+ return ret;
+ if (sock_ind >= plat_dev.num_sockets)
+ return -EINVAL;
+
+ ret = hsmp_parse_acpi_table(dev, sock_ind);
+ if (ret) {
+ dev_err(dev, "Failed to parse ACPI table\n");
+ return ret;
+ }
+
+ /* Test the hsmp interface */
+ ret = hsmp_test(sock_ind, 0xDEADBEEF);
+ if (ret) {
+ dev_err(dev, "HSMP test message failed on Fam:%x model:%x\n",
+ boot_cpu_data.x86, boot_cpu_data.x86_model);
+ dev_err(dev, "Is HSMP disabled in BIOS ?\n");
+ return ret;
+ }
+
+ ret = hsmp_cache_proto_ver(sock_ind);
+ if (ret) {
+ dev_err(dev, "Failed to read HSMP protocol version\n");
+ return ret;
+ }
+
+ return ret;
+}
@@ -28,22 +28,8 @@
#define HSMP_WR true
#define HSMP_RD false
-/* These are the strings specified in ACPI table */
-#define MSG_IDOFF_STR "MsgIdOffset"
-#define MSG_ARGOFF_STR "MsgArgOffset"
-#define MSG_RESPOFF_STR "MsgRspOffset"
-
struct hsmp_plat_device plat_dev;
-static void amd_hsmp_acpi_rdwr(struct hsmp_socket *sock, u32 offset,
- u32 *value, bool write)
-{
- if (write)
- iowrite32(*value, sock->virt_base_addr + offset);
- else
- *value = ioread32(sock->virt_base_addr + offset);
-}
-
static int amd_hsmp_rdwr(struct hsmp_socket *sock, u32 offset,
u32 *value, bool write)
{
@@ -298,181 +284,6 @@ long hsmp_ioctl(struct file *fp, unsigned int cmd, unsigned long arg)
return 0;
}
-/* This is the UUID used for HSMP */
-static const guid_t acpi_hsmp_uuid = GUID_INIT(0xb74d619d, 0x5707, 0x48bd,
- 0xa6, 0x9f, 0x4e, 0xa2,
- 0x87, 0x1f, 0xc2, 0xf6);
-
-static inline bool is_acpi_hsmp_uuid(union acpi_object *obj)
-{
- if (obj->type == ACPI_TYPE_BUFFER && obj->buffer.length == UUID_SIZE)
- return guid_equal((guid_t *)obj->buffer.pointer, &acpi_hsmp_uuid);
-
- return false;
-}
-
-static inline int hsmp_get_uid(struct device *dev, u16 *sock_ind)
-{
- char *uid;
-
- /*
- * UID (ID00, ID01..IDXX) is used for differentiating sockets,
- * read it and strip the "ID" part of it and convert the remaining
- * bytes to integer.
- */
- uid = acpi_device_uid(ACPI_COMPANION(dev));
-
- return kstrtou16(uid + 2, 10, sock_ind);
-}
-
-static acpi_status hsmp_resource(struct acpi_resource *res, void *data)
-{
- struct hsmp_socket *sock = data;
- struct resource r;
-
- switch (res->type) {
- case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
- if (!acpi_dev_resource_memory(res, &r))
- return AE_ERROR;
- if (!r.start || r.end < r.start || !(r.flags & IORESOURCE_MEM_WRITEABLE))
- return AE_ERROR;
- sock->mbinfo.base_addr = r.start;
- sock->mbinfo.size = resource_size(&r);
- break;
- case ACPI_RESOURCE_TYPE_END_TAG:
- break;
- default:
- return AE_ERROR;
- }
-
- return AE_OK;
-}
-
-static int hsmp_read_acpi_dsd(struct hsmp_socket *sock)
-{
- struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL };
- union acpi_object *guid, *mailbox_package;
- union acpi_object *dsd;
- acpi_status status;
- int ret = 0;
- int j;
-
- status = acpi_evaluate_object_typed(ACPI_HANDLE(sock->dev), "_DSD", NULL,
- &buf, ACPI_TYPE_PACKAGE);
- if (ACPI_FAILURE(status)) {
- dev_err(sock->dev, "Failed to read mailbox reg offsets from DSD table, err: %s\n",
- acpi_format_exception(status));
- return -ENODEV;
- }
-
- dsd = buf.pointer;
-
- /* HSMP _DSD property should contain 2 objects.
- * 1. guid which is an acpi object of type ACPI_TYPE_BUFFER
- * 2. mailbox which is an acpi object of type ACPI_TYPE_PACKAGE
- * This mailbox object contains 3 more acpi objects of type
- * ACPI_TYPE_PACKAGE for holding msgid, msgresp, msgarg offsets
- * these packages inturn contain 2 acpi objects of type
- * ACPI_TYPE_STRING and ACPI_TYPE_INTEGER
- */
- if (!dsd || dsd->type != ACPI_TYPE_PACKAGE || dsd->package.count != 2) {
- ret = -EINVAL;
- goto free_buf;
- }
-
- guid = &dsd->package.elements[0];
- mailbox_package = &dsd->package.elements[1];
- if (!is_acpi_hsmp_uuid(guid) || mailbox_package->type != ACPI_TYPE_PACKAGE) {
- dev_err(sock->dev, "Invalid hsmp _DSD table data\n");
- ret = -EINVAL;
- goto free_buf;
- }
-
- for (j = 0; j < mailbox_package->package.count; j++) {
- union acpi_object *msgobj, *msgstr, *msgint;
-
- msgobj = &mailbox_package->package.elements[j];
- msgstr = &msgobj->package.elements[0];
- msgint = &msgobj->package.elements[1];
-
- /* package should have 1 string and 1 integer object */
- if (msgobj->type != ACPI_TYPE_PACKAGE ||
- msgstr->type != ACPI_TYPE_STRING ||
- msgint->type != ACPI_TYPE_INTEGER) {
- ret = -EINVAL;
- goto free_buf;
- }
-
- if (!strncmp(msgstr->string.pointer, MSG_IDOFF_STR,
- msgstr->string.length)) {
- sock->mbinfo.msg_id_off = msgint->integer.value;
- } else if (!strncmp(msgstr->string.pointer, MSG_RESPOFF_STR,
- msgstr->string.length)) {
- sock->mbinfo.msg_resp_off = msgint->integer.value;
- } else if (!strncmp(msgstr->string.pointer, MSG_ARGOFF_STR,
- msgstr->string.length)) {
- sock->mbinfo.msg_arg_off = msgint->integer.value;
- } else {
- ret = -ENOENT;
- goto free_buf;
- }
- }
-
- if (!sock->mbinfo.msg_id_off || !sock->mbinfo.msg_resp_off ||
- !sock->mbinfo.msg_arg_off)
- ret = -EINVAL;
-
-free_buf:
- ACPI_FREE(buf.pointer);
- return ret;
-}
-
-static int hsmp_read_acpi_crs(struct hsmp_socket *sock)
-{
- acpi_status status;
-
- status = acpi_walk_resources(ACPI_HANDLE(sock->dev), METHOD_NAME__CRS,
- hsmp_resource, sock);
- if (ACPI_FAILURE(status)) {
- dev_err(sock->dev, "Failed to look up MP1 base address from CRS method, err: %s\n",
- acpi_format_exception(status));
- return -EINVAL;
- }
- if (!sock->mbinfo.base_addr || !sock->mbinfo.size)
- return -EINVAL;
-
- /* The mapped region should be un cached */
- sock->virt_base_addr = devm_ioremap_uc(sock->dev, sock->mbinfo.base_addr,
- sock->mbinfo.size);
- if (!sock->virt_base_addr) {
- dev_err(sock->dev, "Failed to ioremap MP1 base address\n");
- return -ENOMEM;
- }
-
- return 0;
-}
-
-/* Parse the ACPI table to read the data */
-static int hsmp_parse_acpi_table(struct device *dev, u16 sock_ind)
-{
- struct hsmp_socket *sock = &plat_dev.sock[sock_ind];
- int ret;
-
- sock->sock_ind = sock_ind;
- sock->dev = dev;
- plat_dev.is_acpi_device = true;
-
- sema_init(&sock->hsmp_sem, 1);
-
- /* Read MP1 base address from CRS method */
- ret = hsmp_read_acpi_crs(sock);
- if (ret)
- return ret;
-
- /* Read mailbox offsets from DSD table */
- return hsmp_read_acpi_dsd(sock);
-}
-
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)
@@ -581,29 +392,6 @@ int hsmp_create_attr_list(struct attribute_group *attr_grp,
return hsmp_init_metric_tbl_bin_attr(hsmp_bin_attrs, sock_ind);
}
-int hsmp_create_acpi_sysfs_if(struct device *dev)
-{
- struct attribute_group *attr_grp;
- u16 sock_ind;
- int ret;
-
- 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;
-
- ret = hsmp_create_attr_list(attr_grp, dev, sock_ind);
- if (ret)
- return ret;
-
- return devm_device_add_group(dev, attr_grp);
-}
-
int hsmp_cache_proto_ver(u16 sock_ind)
{
struct hsmp_message msg = { 0 };
@@ -619,38 +407,3 @@ int hsmp_cache_proto_ver(u16 sock_ind)
return ret;
}
-
-int init_acpi(struct device *dev)
-{
- u16 sock_ind;
- int ret;
-
- ret = hsmp_get_uid(dev, &sock_ind);
- if (ret)
- return ret;
- if (sock_ind >= plat_dev.num_sockets)
- return -EINVAL;
-
- ret = hsmp_parse_acpi_table(dev, sock_ind);
- if (ret) {
- dev_err(dev, "Failed to parse ACPI table\n");
- return ret;
- }
-
- /* Test the hsmp interface */
- ret = hsmp_test(sock_ind, 0xDEADBEEF);
- if (ret) {
- dev_err(dev, "HSMP test message failed on Fam:%x model:%x\n",
- boot_cpu_data.x86, boot_cpu_data.x86_model);
- dev_err(dev, "Is HSMP disabled in BIOS ?\n");
- return ret;
- }
-
- ret = hsmp_cache_proto_ver(sock_ind);
- if (ret) {
- dev_err(dev, "Failed to read HSMP protocol version\n");
- return ret;
- }
-
- return ret;
-}
@@ -68,4 +68,6 @@ umode_t hsmp_is_sock_attr_visible(struct kobject *kobj,
int hsmp_create_attr_list(struct attribute_group *attr_grp,
struct device *dev, u16 sock_ind);
int hsmp_test(u16 sock_ind, u32 value);
+void amd_hsmp_acpi_rdwr(struct hsmp_socket *sock, u32 offset,
+ u32 *value, bool write);
#endif /* HSMP_H */