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ARM cpufreq updates for 6.7

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- Add support for several Qualcomm SoC versions (Robert Marko and
   Varadarajan Narayanan).
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Merge tag 'cpufreq-arm-updates-6.7-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm

Merge ARM cpufreq updates for 6.7 (part 2) from Viresh kumar:

"- Add support for several Qualcomm SoC versions (Robert Marko and
   Varadarajan Narayanan)."

* tag 'cpufreq-arm-updates-6.7-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
  cpufreq: qcom-nvmem: Introduce cpufreq for ipq95xx
  cpufreq: qcom-nvmem: Enable cpufreq for ipq53xx
  cpufreq: qcom-nvmem: add support for IPQ8074
  soc: qcom: socinfo: Add IDs for IPQ8174 family
  dt-bindings: arm: qcom,ids: Add IDs for IPQ8174 family
  dt-bindings: qcom: geni-se: Allow dma-coherent
  soc: qcom: socinfo: Add SoC ID for QCM6490
  dt-bindings: arm: qcom,ids: Add SoC ID for QCM6490
  soc: qcom: socinfo: Add SM8550-adjacent PMICs
  soc: qcom: wcnss_ctrl: Remove redundant initialization owner in wcnss_ctrl_driver
  soc: qcom: socinfo: Add Soc ID for SM7150P
  dt-bindings: arm: qcom,ids: Add Soc ID for SM7150P
  firmware: Add support for Qualcomm UEFI Secure Application
  firmware: qcom_scm: Add support for Qualcomm Secure Execution Environment SCM interface
  lib/ucs2_string: Add UCS-2 strscpy function
This commit is contained in:
Rafael J. Wysocki 2023-11-03 15:31:57 +01:00
commit d1f6be54ea
16 changed files with 1633 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/devicetree/bindings/soc/qcom/qcom,geni-se.yaml
View File

@ -52,6 +52,8 @@ properties:
iommus:
maxItems: 1
dma-coherent: true
required:
- compatible
- reg

12
MAINTAINERS
View File

@ -17844,6 +17844,18 @@ S: Maintained
F: Documentation/devicetree/bindings/mtd/qcom,nandc.yaml
F: drivers/mtd/nand/raw/qcom_nandc.c
QUALCOMM QSEECOM DRIVER
M: Maximilian Luz <luzmaximilian@gmail.com>
L: linux-arm-msm@vger.kernel.org
S: Maintained
F: drivers/firmware/qcom_qseecom.c
QUALCOMM QSEECOM UEFISECAPP DRIVER
M: Maximilian Luz <luzmaximilian@gmail.com>
L: linux-arm-msm@vger.kernel.org
S: Maintained
F: drivers/firmware/qcom_qseecom_uefisecapp.c
QUALCOMM RMNET DRIVER
M: Subash Abhinov Kasiviswanathan <quic_subashab@quicinc.com>
M: Sean Tranchetti <quic_stranche@quicinc.com>

3
drivers/cpufreq/cpufreq-dt-platdev.c
View File

@ -180,8 +180,11 @@ static const struct of_device_id blocklist[] __initconst = {
{ .compatible = "ti,am62a7", },
{ .compatible = "ti,am62p5", },
{ .compatible = "qcom,ipq5332", },
{ .compatible = "qcom,ipq6018", },
{ .compatible = "qcom,ipq8064", },
{ .compatible = "qcom,ipq8074", },
{ .compatible = "qcom,ipq9574", },
{ .compatible = "qcom,apq8064", },
{ .compatible = "qcom,msm8974", },
{ .compatible = "qcom,msm8960", },

60
drivers/cpufreq/qcom-cpufreq-nvmem.c
View File

@ -38,6 +38,11 @@ enum ipq806x_versions {
#define IPQ6000_VERSION BIT(2)
enum ipq8074_versions {
IPQ8074_HAWKEYE_VERSION = 0,
IPQ8074_ACORN_VERSION,
};
struct qcom_cpufreq_drv;
struct qcom_cpufreq_match_data {
@ -178,6 +183,16 @@ static int qcom_cpufreq_kryo_name_version(struct device *cpu_dev,
switch (msm_id) {
case QCOM_ID_MSM8996:
case QCOM_ID_APQ8096:
case QCOM_ID_IPQ5332:
case QCOM_ID_IPQ5322:
case QCOM_ID_IPQ5312:
case QCOM_ID_IPQ5302:
case QCOM_ID_IPQ5300:
case QCOM_ID_IPQ9514:
case QCOM_ID_IPQ9550:
case QCOM_ID_IPQ9554:
case QCOM_ID_IPQ9570:
case QCOM_ID_IPQ9574:
drv->versions = 1 << (unsigned int)(*speedbin);
break;
case QCOM_ID_MSM8996SG:
@ -338,6 +353,44 @@ static int qcom_cpufreq_ipq6018_name_version(struct device *cpu_dev,
return 0;
}
static int qcom_cpufreq_ipq8074_name_version(struct device *cpu_dev,
struct nvmem_cell *speedbin_nvmem,
char **pvs_name,
struct qcom_cpufreq_drv *drv)
{
u32 msm_id;
int ret;
*pvs_name = NULL;
ret = qcom_smem_get_soc_id(&msm_id);
if (ret)
return ret;
switch (msm_id) {
case QCOM_ID_IPQ8070A:
case QCOM_ID_IPQ8071A:
case QCOM_ID_IPQ8172:
case QCOM_ID_IPQ8173:
case QCOM_ID_IPQ8174:
drv->versions = BIT(IPQ8074_ACORN_VERSION);
break;
case QCOM_ID_IPQ8072A:
case QCOM_ID_IPQ8074A:
case QCOM_ID_IPQ8076A:
case QCOM_ID_IPQ8078A:
drv->versions = BIT(IPQ8074_HAWKEYE_VERSION);
break;
default:
dev_err(cpu_dev,
"SoC ID %u is not part of IPQ8074 family, limiting to 1.4GHz!\n",
msm_id);
drv->versions = BIT(IPQ8074_ACORN_VERSION);
break;
}
return 0;
}
static const char *generic_genpd_names[] = { "perf", NULL };
static const struct qcom_cpufreq_match_data match_data_kryo = {
@ -367,6 +420,10 @@ static const struct qcom_cpufreq_match_data match_data_ipq8064 = {
.get_version = qcom_cpufreq_ipq8064_name_version,
};
static const struct qcom_cpufreq_match_data match_data_ipq8074 = {
.get_version = qcom_cpufreq_ipq8074_name_version,
};
static int qcom_cpufreq_probe(struct platform_device *pdev)
{
struct qcom_cpufreq_drv *drv;
@ -494,9 +551,12 @@ static const struct of_device_id qcom_cpufreq_match_list[] __initconst = {
{ .compatible = "qcom,msm8909", .data = &match_data_msm8909 },
{ .compatible = "qcom,msm8996", .data = &match_data_kryo },
{ .compatible = "qcom,qcs404", .data = &match_data_qcs404 },
{ .compatible = "qcom,ipq5332", .data = &match_data_kryo },
{ .compatible = "qcom,ipq6018", .data = &match_data_ipq6018 },
{ .compatible = "qcom,ipq8064", .data = &match_data_ipq8064 },
{ .compatible = "qcom,ipq8074", .data = &match_data_ipq8074 },
{ .compatible = "qcom,apq8064", .data = &match_data_krait },
{ .compatible = "qcom,ipq9574", .data = &match_data_kryo },
{ .compatible = "qcom,msm8974", .data = &match_data_krait },
{ .compatible = "qcom,msm8960", .data = &match_data_krait },
{},

32
drivers/firmware/Kconfig
View File

@ -226,6 +226,38 @@ config QCOM_SCM_DOWNLOAD_MODE_DEFAULT
Say Y here to enable "download mode" by default.
config QCOM_QSEECOM
bool "Qualcomm QSEECOM interface driver"
depends on QCOM_SCM=y
help
Various Qualcomm SoCs have a Secure Execution Environment (SEE) running
in the Trust Zone. This module provides an interface to that via the
QSEECOM mechanism, using SCM calls.
The QSEECOM interface allows, among other things, access to applications
running in the SEE. An example of such an application is 'uefisecapp',
which is required to access UEFI variables on certain systems. If
selected, the interface will also attempt to detect and register client
devices for supported applications.
Select Y here to enable the QSEECOM interface driver.
config QCOM_QSEECOM_UEFISECAPP
bool "Qualcomm SEE UEFI Secure App client driver"
depends on QCOM_QSEECOM
depends on EFI
help
Various Qualcomm SoCs do not allow direct access to EFI variables.
Instead, these need to be accessed via the UEFI Secure Application
(uefisecapp), residing in the Secure Execution Environment (SEE).
This module provides a client driver for uefisecapp, installing efivar
operations to allow the kernel accessing EFI variables, and via that also
provide user-space with access to EFI variables via efivarfs.
Select Y here to provide access to EFI variables on the aforementioned
platforms.
config SYSFB
bool
select BOOT_VESA_SUPPORT

2
drivers/firmware/Makefile
View File

@ -20,6 +20,8 @@ obj-$(CONFIG_RASPBERRYPI_FIRMWARE) += raspberrypi.o
obj-$(CONFIG_FW_CFG_SYSFS) += qemu_fw_cfg.o
obj-$(CONFIG_QCOM_SCM) += qcom-scm.o
qcom-scm-objs += qcom_scm.o qcom_scm-smc.o qcom_scm-legacy.o
obj-$(CONFIG_QCOM_QSEECOM) += qcom_qseecom.o
obj-$(CONFIG_QCOM_QSEECOM_UEFISECAPP) += qcom_qseecom_uefisecapp.o
obj-$(CONFIG_SYSFB) += sysfb.o
obj-$(CONFIG_SYSFB_SIMPLEFB) += sysfb_simplefb.o
obj-$(CONFIG_TI_SCI_PROTOCOL) += ti_sci.o

120
drivers/firmware/qcom_qseecom.c Normal file
View File

@ -0,0 +1,120 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Driver for Qualcomm Secure Execution Environment (SEE) interface (QSEECOM).
* Responsible for setting up and managing QSEECOM client devices.
*
* Copyright (C) 2023 Maximilian Luz <luzmaximilian@gmail.com>
*/
#include <linux/auxiliary_bus.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/firmware/qcom/qcom_qseecom.h>
#include <linux/firmware/qcom/qcom_scm.h>
struct qseecom_app_desc {
const char *app_name;
const char *dev_name;
};
static void qseecom_client_release(struct device *dev)
{
struct qseecom_client *client;
client = container_of(dev, struct qseecom_client, aux_dev.dev);
kfree(client);
}
static void qseecom_client_remove(void *data)
{
struct qseecom_client *client = data;
auxiliary_device_delete(&client->aux_dev);
auxiliary_device_uninit(&client->aux_dev);
}
static int qseecom_client_register(struct platform_device *qseecom_dev,
const struct qseecom_app_desc *desc)
{
struct qseecom_client *client;
u32 app_id;
int ret;
/* Try to find the app ID, skip device if not found */
ret = qcom_scm_qseecom_app_get_id(desc->app_name, &app_id);
if (ret)
return ret == -ENOENT ? 0 : ret;
dev_info(&qseecom_dev->dev, "setting up client for %s\n", desc->app_name);
/* Allocate and set-up the client device */
client = kzalloc(sizeof(*client), GFP_KERNEL);
if (!client)
return -ENOMEM;
client->aux_dev.name = desc->dev_name;
client->aux_dev.dev.parent = &qseecom_dev->dev;
client->aux_dev.dev.release = qseecom_client_release;
client->app_id = app_id;
ret = auxiliary_device_init(&client->aux_dev);
if (ret) {
kfree(client);
return ret;
}
ret = auxiliary_device_add(&client->aux_dev);
if (ret) {
auxiliary_device_uninit(&client->aux_dev);
return ret;
}
ret = devm_add_action_or_reset(&qseecom_dev->dev, qseecom_client_remove, client);
if (ret)
return ret;
return 0;
}
/*
* List of supported applications. One client device will be created per entry,
* assuming the app has already been loaded (usually by firmware bootloaders)
* and its ID can be queried successfully.
*/
static const struct qseecom_app_desc qcom_qseecom_apps[] = {
{ "qcom.tz.uefisecapp", "uefisecapp" },
};
static int qcom_qseecom_probe(struct platform_device *qseecom_dev)
{
int ret;
int i;
/* Set up client devices for each base application */
for (i = 0; i < ARRAY_SIZE(qcom_qseecom_apps); i++) {
ret = qseecom_client_register(qseecom_dev, &qcom_qseecom_apps[i]);
if (ret)
return ret;
}
return 0;
}
static struct platform_driver qcom_qseecom_driver = {
.driver = {
.name = "qcom_qseecom",
},
.probe = qcom_qseecom_probe,
};
static int __init qcom_qseecom_init(void)
{
return platform_driver_register(&qcom_qseecom_driver);
}
subsys_initcall(qcom_qseecom_init);
MODULE_AUTHOR("Maximilian Luz <luzmaximilian@gmail.com>");
MODULE_DESCRIPTION("Driver for the Qualcomm SEE (QSEECOM) interface");
MODULE_LICENSE("GPL");

871
drivers/firmware/qcom_qseecom_uefisecapp.c Normal file
View File

@ -0,0 +1,871 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Client driver for Qualcomm UEFI Secure Application (qcom.tz.uefisecapp).
* Provides access to UEFI variables on platforms where they are secured by the
* aforementioned Secure Execution Environment (SEE) application.
*
* Copyright (C) 2023 Maximilian Luz <luzmaximilian@gmail.com>
*/
#include <linux/efi.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/ucs2_string.h>
#include <linux/firmware/qcom/qcom_qseecom.h>
/* -- Qualcomm "uefisecapp" interface definitions. -------------------------- */
/* Maximum length of name string with null-terminator */
#define QSEE_MAX_NAME_LEN 1024
#define QSEE_CMD_UEFI(x) (0x8000 | (x))
#define QSEE_CMD_UEFI_GET_VARIABLE QSEE_CMD_UEFI(0)
#define QSEE_CMD_UEFI_SET_VARIABLE QSEE_CMD_UEFI(1)
#define QSEE_CMD_UEFI_GET_NEXT_VARIABLE QSEE_CMD_UEFI(2)
#define QSEE_CMD_UEFI_QUERY_VARIABLE_INFO QSEE_CMD_UEFI(3)
/**
* struct qsee_req_uefi_get_variable - Request for GetVariable command.
* @command_id: The ID of the command. Must be %QSEE_CMD_UEFI_GET_VARIABLE.
* @length: Length of the request in bytes, including this struct and any
* parameters (name, GUID) stored after it as well as any padding
* thereof for alignment.
* @name_offset: Offset from the start of this struct to where the variable
* name is stored (as utf-16 string), in bytes.
* @name_size: Size of the name parameter in bytes, including null-terminator.
* @guid_offset: Offset from the start of this struct to where the GUID
* parameter is stored, in bytes.
* @guid_size: Size of the GUID parameter in bytes, i.e. sizeof(efi_guid_t).
* @data_size: Size of the output buffer, in bytes.
*/
struct qsee_req_uefi_get_variable {
u32 command_id;
u32 length;
u32 name_offset;
u32 name_size;
u32 guid_offset;
u32 guid_size;
u32 data_size;
} __packed;
/**
* struct qsee_rsp_uefi_get_variable - Response for GetVariable command.
* @command_id: The ID of the command. Should be %QSEE_CMD_UEFI_GET_VARIABLE.
* @length: Length of the response in bytes, including this struct and the
* returned data.
* @status: Status of this command.
* @attributes: EFI variable attributes.
* @data_offset: Offset from the start of this struct to where the data is
* stored, in bytes.
* @data_size: Size of the returned data, in bytes. In case status indicates
* that the buffer is too small, this will be the size required
* to store the EFI variable data.
*/
struct qsee_rsp_uefi_get_variable {
u32 command_id;
u32 length;
u32 status;
u32 attributes;
u32 data_offset;
u32 data_size;
} __packed;
/**
* struct qsee_req_uefi_set_variable - Request for the SetVariable command.
* @command_id: The ID of the command. Must be %QSEE_CMD_UEFI_SET_VARIABLE.
* @length: Length of the request in bytes, including this struct and any
* parameters (name, GUID, data) stored after it as well as any
* padding thereof required for alignment.
* @name_offset: Offset from the start of this struct to where the variable
* name is stored (as utf-16 string), in bytes.
* @name_size: Size of the name parameter in bytes, including null-terminator.
* @guid_offset: Offset from the start of this struct to where the GUID
* parameter is stored, in bytes.
* @guid_size: Size of the GUID parameter in bytes, i.e. sizeof(efi_guid_t).
* @attributes: The EFI variable attributes to set for this variable.
* @data_offset: Offset from the start of this struct to where the EFI variable
* data is stored, in bytes.
* @data_size: Size of EFI variable data, in bytes.
*
*/
struct qsee_req_uefi_set_variable {
u32 command_id;
u32 length;
u32 name_offset;
u32 name_size;
u32 guid_offset;
u32 guid_size;
u32 attributes;
u32 data_offset;
u32 data_size;
} __packed;
/**
* struct qsee_rsp_uefi_set_variable - Response for the SetVariable command.
* @command_id: The ID of the command. Should be %QSEE_CMD_UEFI_SET_VARIABLE.
* @length: The length of this response, i.e. the size of this struct in
* bytes.
* @status: Status of this command.
* @_unknown1: Unknown response field.
* @_unknown2: Unknown response field.
*/
struct qsee_rsp_uefi_set_variable {
u32 command_id;
u32 length;
u32 status;
u32 _unknown1;
u32 _unknown2;
} __packed;
/**
* struct qsee_req_uefi_get_next_variable - Request for the
* GetNextVariableName command.
* @command_id: The ID of the command. Must be
* %QSEE_CMD_UEFI_GET_NEXT_VARIABLE.
* @length: Length of the request in bytes, including this struct and any
* parameters (name, GUID) stored after it as well as any padding
* thereof for alignment.
* @guid_offset: Offset from the start of this struct to where the GUID
* parameter is stored, in bytes.
* @guid_size: Size of the GUID parameter in bytes, i.e. sizeof(efi_guid_t).
* @name_offset: Offset from the start of this struct to where the variable
* name is stored (as utf-16 string), in bytes.
* @name_size: Size of the name parameter in bytes, including null-terminator.
*/
struct qsee_req_uefi_get_next_variable {
u32 command_id;
u32 length;
u32 guid_offset;
u32 guid_size;
u32 name_offset;
u32 name_size;
} __packed;
/**
* struct qsee_rsp_uefi_get_next_variable - Response for the
* GetNextVariableName command.
* @command_id: The ID of the command. Should be
* %QSEE_CMD_UEFI_GET_NEXT_VARIABLE.
* @length: Length of the response in bytes, including this struct and any
* parameters (name, GUID) stored after it as well as any padding
* thereof for alignment.
* @status: Status of this command.
* @guid_offset: Offset from the start of this struct to where the GUID
* parameter is stored, in bytes.
* @guid_size: Size of the GUID parameter in bytes, i.e. sizeof(efi_guid_t).
* @name_offset: Offset from the start of this struct to where the variable
* name is stored (as utf-16 string), in bytes.
* @name_size: Size of the name parameter in bytes, including null-terminator.
*/
struct qsee_rsp_uefi_get_next_variable {
u32 command_id;
u32 length;
u32 status;
u32 guid_offset;
u32 guid_size;
u32 name_offset;
u32 name_size;
} __packed;
/**
* struct qsee_req_uefi_query_variable_info - Response for the
* GetNextVariableName command.
* @command_id: The ID of the command. Must be
* %QSEE_CMD_UEFI_QUERY_VARIABLE_INFO.
* @length: The length of this request, i.e. the size of this struct in
* bytes.
* @attributes: The storage attributes to query the info for.
*/
struct qsee_req_uefi_query_variable_info {
u32 command_id;
u32 length;
u32 attributes;
} __packed;
/**
* struct qsee_rsp_uefi_query_variable_info - Response for the
* GetNextVariableName command.
* @command_id: The ID of the command. Must be
* %QSEE_CMD_UEFI_QUERY_VARIABLE_INFO.
* @length: The length of this response, i.e. the size of this
* struct in bytes.
* @status: Status of this command.
* @_pad: Padding.
* @storage_space: Full storage space size, in bytes.
* @remaining_space: Free storage space available, in bytes.
* @max_variable_size: Maximum variable data size, in bytes.
*/
struct qsee_rsp_uefi_query_variable_info {
u32 command_id;
u32 length;
u32 status;
u32 _pad;
u64 storage_space;
u64 remaining_space;
u64 max_variable_size;
} __packed;
/* -- Alignment helpers ----------------------------------------------------- */
/*
* Helper macro to ensure proper alignment of types (fields and arrays) when
* stored in some (contiguous) buffer.
*
* Note: The driver from which this one has been reverse-engineered expects an
* alignment of 8 bytes (64 bits) for GUIDs. Our definition of efi_guid_t,
* however, has an alignment of 4 byte (32 bits). So far, this seems to work
* fine here. See also the comment on the typedef of efi_guid_t.
*/
#define qcuefi_buf_align_fields(fields...) \
({ \
size_t __len = 0; \
fields \
__len; \
})
#define __field_impl(size, align, offset) \
({ \
size_t *__offset = (offset); \
size_t __aligned; \
\
__aligned = ALIGN(__len, align); \
__len = __aligned + (size); \
\
if (__offset) \
*__offset = __aligned; \
});
#define __array_offs(type, count, offset) \
__field_impl(sizeof(type) * (count), __alignof__(type), offset)
#define __array(type, count) __array_offs(type, count, NULL)
#define __field_offs(type, offset) __array_offs(type, 1, offset)
#define __field(type) __array_offs(type, 1, NULL)
/* -- UEFI app interface. --------------------------------------------------- */
struct qcuefi_client {
struct qseecom_client *client;
struct efivars efivars;
};
static struct device *qcuefi_dev(struct qcuefi_client *qcuefi)
{
return &qcuefi->client->aux_dev.dev;
}
static efi_status_t qsee_uefi_status_to_efi(u32 status)
{
u64 category = status & 0xf0000000;
u64 code = status & 0x0fffffff;
return category << (BITS_PER_LONG - 32) | code;
}
static efi_status_t qsee_uefi_get_variable(struct qcuefi_client *qcuefi, const efi_char16_t *name,
const efi_guid_t *guid, u32 *attributes,
unsigned long *data_size, void *data)
{
struct qsee_req_uefi_get_variable *req_data;
struct qsee_rsp_uefi_get_variable *rsp_data;
unsigned long buffer_size = *data_size;
efi_status_t efi_status = EFI_SUCCESS;
unsigned long name_length;
size_t guid_offs;
size_t name_offs;
size_t req_size;
size_t rsp_size;
ssize_t status;
if (!name || !guid)
return EFI_INVALID_PARAMETER;
name_length = ucs2_strnlen(name, QSEE_MAX_NAME_LEN) + 1;
if (name_length > QSEE_MAX_NAME_LEN)
return EFI_INVALID_PARAMETER;
if (buffer_size && !data)
return EFI_INVALID_PARAMETER;
req_size = qcuefi_buf_align_fields(
__field(*req_data)
__array_offs(*name, name_length, &name_offs)
__field_offs(*guid, &guid_offs)
);
rsp_size = qcuefi_buf_align_fields(
__field(*rsp_data)
__array(u8, buffer_size)
);
req_data = kzalloc(req_size, GFP_KERNEL);
if (!req_data) {
efi_status = EFI_OUT_OF_RESOURCES;
goto out;
}
rsp_data = kzalloc(rsp_size, GFP_KERNEL);
if (!rsp_data) {
efi_status = EFI_OUT_OF_RESOURCES;
goto out_free_req;
}
req_data->command_id = QSEE_CMD_UEFI_GET_VARIABLE;
req_data->data_size = buffer_size;
req_data->name_offset = name_offs;
req_data->name_size = name_length * sizeof(*name);
req_data->guid_offset = guid_offs;
req_data->guid_size = sizeof(*guid);
req_data->length = req_size;
status = ucs2_strscpy(((void *)req_data) + req_data->name_offset, name, name_length);
if (status < 0)
return EFI_INVALID_PARAMETER;
memcpy(((void *)req_data) + req_data->guid_offset, guid, req_data->guid_size);
status = qcom_qseecom_app_send(qcuefi->client, req_data, req_size, rsp_data, rsp_size);
if (status) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->command_id != QSEE_CMD_UEFI_GET_VARIABLE) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->length < sizeof(*rsp_data)) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->status) {
dev_dbg(qcuefi_dev(qcuefi), "%s: uefisecapp error: 0x%x\n",
__func__, rsp_data->status);
efi_status = qsee_uefi_status_to_efi(rsp_data->status);
/* Update size and attributes in case buffer is too small. */
if (efi_status == EFI_BUFFER_TOO_SMALL) {
*data_size = rsp_data->data_size;
if (attributes)
*attributes = rsp_data->attributes;
}
goto out_free;
}
if (rsp_data->length > rsp_size) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->data_offset + rsp_data->data_size > rsp_data->length) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
/*
* Note: We need to set attributes and data size even if the buffer is
* too small and we won't copy any data. This is described in spec, so
* that callers can either allocate a buffer properly (with two calls
* to this function) or just read back attributes withouth having to
* deal with that.
*
* Specifically:
* - If we have a buffer size of zero and no buffer, just return the
* attributes, required size, and indicate success.
* - If the buffer size is nonzero but too small, indicate that as an
* error.
* - Otherwise, we are good to copy the data.
*
* Note that we have already ensured above that the buffer pointer is
* non-NULL if its size is nonzero.
*/
*data_size = rsp_data->data_size;
if (attributes)
*attributes = rsp_data->attributes;
if (buffer_size == 0 && !data) {
efi_status = EFI_SUCCESS;
goto out_free;
}
if (buffer_size < rsp_data->data_size) {
efi_status = EFI_BUFFER_TOO_SMALL;
goto out_free;
}
memcpy(data, ((void *)rsp_data) + rsp_data->data_offset, rsp_data->data_size);
out_free:
kfree(rsp_data);
out_free_req:
kfree(req_data);
out:
return efi_status;
}
static efi_status_t qsee_uefi_set_variable(struct qcuefi_client *qcuefi, const efi_char16_t *name,
const efi_guid_t *guid, u32 attributes,
unsigned long data_size, const void *data)
{
struct qsee_req_uefi_set_variable *req_data;
struct qsee_rsp_uefi_set_variable *rsp_data;
efi_status_t efi_status = EFI_SUCCESS;
unsigned long name_length;
size_t name_offs;
size_t guid_offs;
size_t data_offs;
size_t req_size;
ssize_t status;
if (!name || !guid)
return EFI_INVALID_PARAMETER;
name_length = ucs2_strnlen(name, QSEE_MAX_NAME_LEN) + 1;
if (name_length > QSEE_MAX_NAME_LEN)
return EFI_INVALID_PARAMETER;
/*
* Make sure we have some data if data_size is nonzero. Note that using
* a size of zero is a valid use-case described in spec and deletes the
* variable.
*/
if (data_size && !data)
return EFI_INVALID_PARAMETER;
req_size = qcuefi_buf_align_fields(
__field(*req_data)
__array_offs(*name, name_length, &name_offs)
__field_offs(*guid, &guid_offs)
__array_offs(u8, data_size, &data_offs)
);
req_data = kzalloc(req_size, GFP_KERNEL);
if (!req_data) {
efi_status = EFI_OUT_OF_RESOURCES;
goto out;
}
rsp_data = kzalloc(sizeof(*rsp_data), GFP_KERNEL);
if (!rsp_data) {
efi_status = EFI_OUT_OF_RESOURCES;
goto out_free_req;
}
req_data->command_id = QSEE_CMD_UEFI_SET_VARIABLE;
req_data->attributes = attributes;
req_data->name_offset = name_offs;
req_data->name_size = name_length * sizeof(*name);
req_data->guid_offset = guid_offs;
req_data->guid_size = sizeof(*guid);
req_data->data_offset = data_offs;
req_data->data_size = data_size;
req_data->length = req_size;
status = ucs2_strscpy(((void *)req_data) + req_data->name_offset, name, name_length);
if (status < 0)
return EFI_INVALID_PARAMETER;
memcpy(((void *)req_data) + req_data->guid_offset, guid, req_data->guid_size);
if (data_size)
memcpy(((void *)req_data) + req_data->data_offset, data, req_data->data_size);
status = qcom_qseecom_app_send(qcuefi->client, req_data, req_size, rsp_data,
sizeof(*rsp_data));
if (status) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->command_id != QSEE_CMD_UEFI_SET_VARIABLE) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->length != sizeof(*rsp_data)) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->status) {
dev_dbg(qcuefi_dev(qcuefi), "%s: uefisecapp error: 0x%x\n",
__func__, rsp_data->status);
efi_status = qsee_uefi_status_to_efi(rsp_data->status);
}
out_free:
kfree(rsp_data);
out_free_req:
kfree(req_data);
out:
return efi_status;
}
static efi_status_t qsee_uefi_get_next_variable(struct qcuefi_client *qcuefi,
unsigned long *name_size, efi_char16_t *name,
efi_guid_t *guid)
{
struct qsee_req_uefi_get_next_variable *req_data;
struct qsee_rsp_uefi_get_next_variable *rsp_data;
efi_status_t efi_status = EFI_SUCCESS;
size_t guid_offs;
size_t name_offs;
size_t req_size;
size_t rsp_size;
ssize_t status;
if (!name_size || !name || !guid)
return EFI_INVALID_PARAMETER;
if (*name_size == 0)
return EFI_INVALID_PARAMETER;
req_size = qcuefi_buf_align_fields(
__field(*req_data)
__field_offs(*guid, &guid_offs)
__array_offs(*name, *name_size / sizeof(*name), &name_offs)
);
rsp_size = qcuefi_buf_align_fields(
__field(*rsp_data)
__field(*guid)
__array(*name, *name_size / sizeof(*name))
);
req_data = kzalloc(req_size, GFP_KERNEL);
if (!req_data) {
efi_status = EFI_OUT_OF_RESOURCES;
goto out;
}
rsp_data = kzalloc(rsp_size, GFP_KERNEL);
if (!rsp_data) {
efi_status = EFI_OUT_OF_RESOURCES;
goto out_free_req;
}
req_data->command_id = QSEE_CMD_UEFI_GET_NEXT_VARIABLE;
req_data->guid_offset = guid_offs;
req_data->guid_size = sizeof(*guid);
req_data->name_offset = name_offs;
req_data->name_size = *name_size;
req_data->length = req_size;
memcpy(((void *)req_data) + req_data->guid_offset, guid, req_data->guid_size);
status = ucs2_strscpy(((void *)req_data) + req_data->name_offset, name,
*name_size / sizeof(*name));
if (status < 0)
return EFI_INVALID_PARAMETER;
status = qcom_qseecom_app_send(qcuefi->client, req_data, req_size, rsp_data, rsp_size);
if (status) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->command_id != QSEE_CMD_UEFI_GET_NEXT_VARIABLE) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->length < sizeof(*rsp_data)) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->status) {
dev_dbg(qcuefi_dev(qcuefi), "%s: uefisecapp error: 0x%x\n",
__func__, rsp_data->status);
efi_status = qsee_uefi_status_to_efi(rsp_data->status);
/*
* If the buffer to hold the name is too small, update the
* name_size with the required size, so that callers can
* reallocate it accordingly.
*/
if (efi_status == EFI_BUFFER_TOO_SMALL)
*name_size = rsp_data->name_size;
goto out_free;
}
if (rsp_data->length > rsp_size) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->name_offset + rsp_data->name_size > rsp_data->length) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->guid_offset + rsp_data->guid_size > rsp_data->length) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->name_size > *name_size) {
*name_size = rsp_data->name_size;
efi_status = EFI_BUFFER_TOO_SMALL;
goto out_free;
}
if (rsp_data->guid_size != sizeof(*guid)) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
memcpy(guid, ((void *)rsp_data) + rsp_data->guid_offset, rsp_data->guid_size);
status = ucs2_strscpy(name, ((void *)rsp_data) + rsp_data->name_offset,
rsp_data->name_size / sizeof(*name));
*name_size = rsp_data->name_size;
if (status < 0) {
/*
* Return EFI_DEVICE_ERROR here because the buffer size should
* have already been validated above, causing this function to
* bail with EFI_BUFFER_TOO_SMALL.
*/
return EFI_DEVICE_ERROR;
}
out_free:
kfree(rsp_data);
out_free_req:
kfree(req_data);
out:
return efi_status;
}
static efi_status_t qsee_uefi_query_variable_info(struct qcuefi_client *qcuefi, u32 attr,
u64 *storage_space, u64 *remaining_space,
u64 *max_variable_size)
{
struct qsee_req_uefi_query_variable_info *req_data;
struct qsee_rsp_uefi_query_variable_info *rsp_data;
efi_status_t efi_status = EFI_SUCCESS;
int status;
req_data = kzalloc(sizeof(*req_data), GFP_KERNEL);
if (!req_data) {
efi_status = EFI_OUT_OF_RESOURCES;
goto out;
}
rsp_data = kzalloc(sizeof(*rsp_data), GFP_KERNEL);
if (!rsp_data) {
efi_status = EFI_OUT_OF_RESOURCES;
goto out_free_req;
}
req_data->command_id = QSEE_CMD_UEFI_QUERY_VARIABLE_INFO;
req_data->attributes = attr;
req_data->length = sizeof(*req_data);
status = qcom_qseecom_app_send(qcuefi->client, req_data, sizeof(*req_data), rsp_data,
sizeof(*rsp_data));
if (status) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->command_id != QSEE_CMD_UEFI_QUERY_VARIABLE_INFO) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->length != sizeof(*rsp_data)) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->status) {
dev_dbg(qcuefi_dev(qcuefi), "%s: uefisecapp error: 0x%x\n",
__func__, rsp_data->status);
efi_status = qsee_uefi_status_to_efi(rsp_data->status);
goto out_free;
}
if (storage_space)
*storage_space = rsp_data->storage_space;
if (remaining_space)
*remaining_space = rsp_data->remaining_space;
if (max_variable_size)
*max_variable_size = rsp_data->max_variable_size;
out_free:
kfree(rsp_data);
out_free_req:
kfree(req_data);
out:
return efi_status;
}
/* -- Global efivar interface. ---------------------------------------------- */
static struct qcuefi_client *__qcuefi;
static DEFINE_MUTEX(__qcuefi_lock);
static int qcuefi_set_reference(struct qcuefi_client *qcuefi)
{
mutex_lock(&__qcuefi_lock);
if (qcuefi && __qcuefi) {
mutex_unlock(&__qcuefi_lock);
return -EEXIST;
}
__qcuefi = qcuefi;
mutex_unlock(&__qcuefi_lock);
return 0;
}
static struct qcuefi_client *qcuefi_acquire(void)
{
mutex_lock(&__qcuefi_lock);
return __qcuefi;
}
static void qcuefi_release(void)
{
mutex_unlock(&__qcuefi_lock);
}
static efi_status_t qcuefi_get_variable(efi_char16_t *name, efi_guid_t *vendor, u32 *attr,
unsigned long *data_size, void *data)
{
struct qcuefi_client *qcuefi;
efi_status_t status;
qcuefi = qcuefi_acquire();
if (!qcuefi)
return EFI_NOT_READY;
status = qsee_uefi_get_variable(qcuefi, name, vendor, attr, data_size, data);
qcuefi_release();
return status;
}
static efi_status_t qcuefi_set_variable(efi_char16_t *name, efi_guid_t *vendor,
u32 attr, unsigned long data_size, void *data)
{
struct qcuefi_client *qcuefi;
efi_status_t status;
qcuefi = qcuefi_acquire();
if (!qcuefi)
return EFI_NOT_READY;
status = qsee_uefi_set_variable(qcuefi, name, vendor, attr, data_size, data);
qcuefi_release();
return status;
}
static efi_status_t qcuefi_get_next_variable(unsigned long *name_size, efi_char16_t *name,
efi_guid_t *vendor)
{
struct qcuefi_client *qcuefi;
efi_status_t status;
qcuefi = qcuefi_acquire();
if (!qcuefi)
return EFI_NOT_READY;
status = qsee_uefi_get_next_variable(qcuefi, name_size, name, vendor);
qcuefi_release();
return status;
}
static efi_status_t qcuefi_query_variable_info(u32 attr, u64 *storage_space, u64 *remaining_space,
u64 *max_variable_size)
{
struct qcuefi_client *qcuefi;
efi_status_t status;
qcuefi = qcuefi_acquire();
if (!qcuefi)
return EFI_NOT_READY;
status = qsee_uefi_query_variable_info(qcuefi, attr, storage_space, remaining_space,
max_variable_size);
qcuefi_release();
return status;
}
static const struct efivar_operations qcom_efivar_ops = {
.get_variable = qcuefi_get_variable,
.set_variable = qcuefi_set_variable,
.get_next_variable = qcuefi_get_next_variable,
.query_variable_info = qcuefi_query_variable_info,
};
/* -- Driver setup. --------------------------------------------------------- */
static int qcom_uefisecapp_probe(struct auxiliary_device *aux_dev,
const struct auxiliary_device_id *aux_dev_id)
{
struct qcuefi_client *qcuefi;
int status;
qcuefi = devm_kzalloc(&aux_dev->dev, sizeof(*qcuefi), GFP_KERNEL);
if (!qcuefi)
return -ENOMEM;
qcuefi->client = container_of(aux_dev, struct qseecom_client, aux_dev);
auxiliary_set_drvdata(aux_dev, qcuefi);
status = qcuefi_set_reference(qcuefi);
if (status)
return status;
status = efivars_register(&qcuefi->efivars, &qcom_efivar_ops);
if (status)
qcuefi_set_reference(NULL);
return status;
}
static void qcom_uefisecapp_remove(struct auxiliary_device *aux_dev)
{
struct qcuefi_client *qcuefi = auxiliary_get_drvdata(aux_dev);
efivars_unregister(&qcuefi->efivars);
qcuefi_set_reference(NULL);
}
static const struct auxiliary_device_id qcom_uefisecapp_id_table[] = {
{ .name = "qcom_qseecom.uefisecapp" },
{}
};
MODULE_DEVICE_TABLE(auxiliary, qcom_uefisecapp_id_table);
static struct auxiliary_driver qcom_uefisecapp_driver = {
.probe = qcom_uefisecapp_probe,
.remove = qcom_uefisecapp_remove,
.id_table = qcom_uefisecapp_id_table,
.driver = {
.name = "qcom_qseecom_uefisecapp",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
};
module_auxiliary_driver(qcom_uefisecapp_driver);
MODULE_AUTHOR("Maximilian Luz <luzmaximilian@gmail.com>");
MODULE_DESCRIPTION("Client driver for Qualcomm SEE UEFI Secure App");
MODULE_LICENSE("GPL");

394
drivers/firmware/qcom_scm.c
View File

@ -55,6 +55,53 @@ struct qcom_scm_mem_map_info {
__le64 mem_size;
};
/**
* struct qcom_scm_qseecom_resp - QSEECOM SCM call response.
* @result: Result or status of the SCM call. See &enum qcom_scm_qseecom_result.
* @resp_type: Type of the response. See &enum qcom_scm_qseecom_resp_type.
* @data: Response data. The type of this data is given in @resp_type.
*/
struct qcom_scm_qseecom_resp {
u64 result;
u64 resp_type;
u64 data;
};
enum qcom_scm_qseecom_result {
QSEECOM_RESULT_SUCCESS = 0,
QSEECOM_RESULT_INCOMPLETE = 1,
QSEECOM_RESULT_BLOCKED_ON_LISTENER = 2,
QSEECOM_RESULT_FAILURE = 0xFFFFFFFF,
};
enum qcom_scm_qseecom_resp_type {
QSEECOM_SCM_RES_APP_ID = 0xEE01,
QSEECOM_SCM_RES_QSEOS_LISTENER_ID = 0xEE02,
};
enum qcom_scm_qseecom_tz_owner {
QSEECOM_TZ_OWNER_SIP = 2,
QSEECOM_TZ_OWNER_TZ_APPS = 48,
QSEECOM_TZ_OWNER_QSEE_OS = 50
};
enum qcom_scm_qseecom_tz_svc {
QSEECOM_TZ_SVC_APP_ID_PLACEHOLDER = 0,
QSEECOM_TZ_SVC_APP_MGR = 1,
QSEECOM_TZ_SVC_INFO = 6,
};
enum qcom_scm_qseecom_tz_cmd_app {
QSEECOM_TZ_CMD_APP_SEND = 1,
QSEECOM_TZ_CMD_APP_LOOKUP = 3,
};
enum qcom_scm_qseecom_tz_cmd_info {
QSEECOM_TZ_CMD_INFO_VERSION = 3,
};
#define QSEECOM_MAX_APP_NAME_SIZE 64
/* Each bit configures cold/warm boot address for one of the 4 CPUs */
static const u8 qcom_scm_cpu_cold_bits[QCOM_SCM_BOOT_MAX_CPUS] = {
0, BIT(0), BIT(3), BIT(5)
@ -1321,6 +1368,340 @@ static int qcom_scm_find_dload_address(struct device *dev, u64 *addr)
return 0;
}
#ifdef CONFIG_QCOM_QSEECOM
/* Lock for QSEECOM SCM call executions */
static DEFINE_MUTEX(qcom_scm_qseecom_call_lock);
static int __qcom_scm_qseecom_call(const struct qcom_scm_desc *desc,
struct qcom_scm_qseecom_resp *res)
{
struct qcom_scm_res scm_res = {};
int status;
/*
* QSEECOM SCM calls should not be executed concurrently. Therefore, we
* require the respective call lock to be held.
*/
lockdep_assert_held(&qcom_scm_qseecom_call_lock);
status = qcom_scm_call(__scm->dev, desc, &scm_res);
res->result = scm_res.result[0];
res->resp_type = scm_res.result[1];
res->data = scm_res.result[2];
if (status)
return status;
return 0;
}
/**
* qcom_scm_qseecom_call() - Perform a QSEECOM SCM call.
* @desc: SCM call descriptor.
* @res: SCM call response (output).
*
* Performs the QSEECOM SCM call described by @desc, returning the response in
* @rsp.
*
* Return: Zero on success, nonzero on failure.
*/
static int qcom_scm_qseecom_call(const struct qcom_scm_desc *desc,
struct qcom_scm_qseecom_resp *res)
{
int status;
/*
* Note: Multiple QSEECOM SCM calls should not be executed same time,
* so lock things here. This needs to be extended to callback/listener
* handling when support for that is implemented.
*/
mutex_lock(&qcom_scm_qseecom_call_lock);
status = __qcom_scm_qseecom_call(desc, res);
mutex_unlock(&qcom_scm_qseecom_call_lock);
dev_dbg(__scm->dev, "%s: owner=%x, svc=%x, cmd=%x, result=%lld, type=%llx, data=%llx\n",
__func__, desc->owner, desc->svc, desc->cmd, res->result,
res->resp_type, res->data);
if (status) {
dev_err(__scm->dev, "qseecom: scm call failed with error %d\n", status);
return status;
}
/*
* TODO: Handle incomplete and blocked calls:
*
* Incomplete and blocked calls are not supported yet. Some devices
* and/or commands require those, some don't. Let's warn about them
* prominently in case someone attempts to try these commands with a
* device/command combination that isn't supported yet.
*/
WARN_ON(res->result == QSEECOM_RESULT_INCOMPLETE);
WARN_ON(res->result == QSEECOM_RESULT_BLOCKED_ON_LISTENER);
return 0;
}
/**
* qcom_scm_qseecom_get_version() - Query the QSEECOM version.
* @version: Pointer where the QSEECOM version will be stored.
*
* Performs the QSEECOM SCM querying the QSEECOM version currently running in
* the TrustZone.
*
* Return: Zero on success, nonzero on failure.
*/
static int qcom_scm_qseecom_get_version(u32 *version)
{
struct qcom_scm_desc desc = {};
struct qcom_scm_qseecom_resp res = {};
u32 feature = 10;
int ret;
desc.owner = QSEECOM_TZ_OWNER_SIP;
desc.svc = QSEECOM_TZ_SVC_INFO;
desc.cmd = QSEECOM_TZ_CMD_INFO_VERSION;
desc.arginfo = QCOM_SCM_ARGS(1, QCOM_SCM_VAL);
desc.args[0] = feature;
ret = qcom_scm_qseecom_call(&desc, &res);
if (ret)
return ret;
*version = res.result;
return 0;
}
/**
* qcom_scm_qseecom_app_get_id() - Query the app ID for a given QSEE app name.
* @app_name: The name of the app.
* @app_id: The returned app ID.
*
* Query and return the application ID of the SEE app identified by the given
* name. This returned ID is the unique identifier of the app required for
* subsequent communication.
*
* Return: Zero on success, nonzero on failure, -ENOENT if the app has not been
* loaded or could not be found.
*/
int qcom_scm_qseecom_app_get_id(const char *app_name, u32 *app_id)
{
unsigned long name_buf_size = QSEECOM_MAX_APP_NAME_SIZE;
unsigned long app_name_len = strlen(app_name);
struct qcom_scm_desc desc = {};
struct qcom_scm_qseecom_resp res = {};
dma_addr_t name_buf_phys;
char *name_buf;
int status;
if (app_name_len >= name_buf_size)
return -EINVAL;
name_buf = kzalloc(name_buf_size, GFP_KERNEL);
if (!name_buf)
return -ENOMEM;
memcpy(name_buf, app_name, app_name_len);
name_buf_phys = dma_map_single(__scm->dev, name_buf, name_buf_size, DMA_TO_DEVICE);
status = dma_mapping_error(__scm->dev, name_buf_phys);
if (status) {
kfree(name_buf);
dev_err(__scm->dev, "qseecom: failed to map dma address\n");
return status;
}
desc.owner = QSEECOM_TZ_OWNER_QSEE_OS;
desc.svc = QSEECOM_TZ_SVC_APP_MGR;
desc.cmd = QSEECOM_TZ_CMD_APP_LOOKUP;
desc.arginfo = QCOM_SCM_ARGS(2, QCOM_SCM_RW, QCOM_SCM_VAL);
desc.args[0] = name_buf_phys;
desc.args[1] = app_name_len;
status = qcom_scm_qseecom_call(&desc, &res);
dma_unmap_single(__scm->dev, name_buf_phys, name_buf_size, DMA_TO_DEVICE);
kfree(name_buf);
if (status)
return status;
if (res.result == QSEECOM_RESULT_FAILURE)
return -ENOENT;
if (res.result != QSEECOM_RESULT_SUCCESS)
return -EINVAL;
if (res.resp_type != QSEECOM_SCM_RES_APP_ID)
return -EINVAL;
*app_id = res.data;
return 0;
}
EXPORT_SYMBOL_GPL(qcom_scm_qseecom_app_get_id);
/**
* qcom_scm_qseecom_app_send() - Send to and receive data from a given QSEE app.
* @app_id: The ID of the target app.
* @req: Request buffer sent to the app (must be DMA-mappable).
* @req_size: Size of the request buffer.
* @rsp: Response buffer, written to by the app (must be DMA-mappable).
* @rsp_size: Size of the response buffer.
*
* Sends a request to the QSEE app associated with the given ID and read back
* its response. The caller must provide two DMA memory regions, one for the
* request and one for the response, and fill out the @req region with the
* respective (app-specific) request data. The QSEE app reads this and returns
* its response in the @rsp region.
*
* Return: Zero on success, nonzero on failure.
*/
int qcom_scm_qseecom_app_send(u32 app_id, void *req, size_t req_size, void *rsp,
size_t rsp_size)
{
struct qcom_scm_qseecom_resp res = {};
struct qcom_scm_desc desc = {};
dma_addr_t req_phys;
dma_addr_t rsp_phys;
int status;
/* Map request buffer */
req_phys = dma_map_single(__scm->dev, req, req_size, DMA_TO_DEVICE);
status = dma_mapping_error(__scm->dev, req_phys);
if (status) {
dev_err(__scm->dev, "qseecom: failed to map request buffer\n");
return status;
}
/* Map response buffer */
rsp_phys = dma_map_single(__scm->dev, rsp, rsp_size, DMA_FROM_DEVICE);
status = dma_mapping_error(__scm->dev, rsp_phys);
if (status) {
dma_unmap_single(__scm->dev, req_phys, req_size, DMA_TO_DEVICE);
dev_err(__scm->dev, "qseecom: failed to map response buffer\n");
return status;
}
/* Set up SCM call data */
desc.owner = QSEECOM_TZ_OWNER_TZ_APPS;
desc.svc = QSEECOM_TZ_SVC_APP_ID_PLACEHOLDER;
desc.cmd = QSEECOM_TZ_CMD_APP_SEND;
desc.arginfo = QCOM_SCM_ARGS(5, QCOM_SCM_VAL,
QCOM_SCM_RW, QCOM_SCM_VAL,
QCOM_SCM_RW, QCOM_SCM_VAL);
desc.args[0] = app_id;
desc.args[1] = req_phys;
desc.args[2] = req_size;
desc.args[3] = rsp_phys;
desc.args[4] = rsp_size;
/* Perform call */
status = qcom_scm_qseecom_call(&desc, &res);
/* Unmap buffers */
dma_unmap_single(__scm->dev, rsp_phys, rsp_size, DMA_FROM_DEVICE);
dma_unmap_single(__scm->dev, req_phys, req_size, DMA_TO_DEVICE);
if (status)
return status;
if (res.result != QSEECOM_RESULT_SUCCESS)
return -EIO;
return 0;
}
EXPORT_SYMBOL_GPL(qcom_scm_qseecom_app_send);
/*
* We do not yet support re-entrant calls via the qseecom interface. To prevent
+ any potential issues with this, only allow validated machines for now.
*/
static const struct of_device_id qcom_scm_qseecom_allowlist[] = {
{ .compatible = "lenovo,thinkpad-x13s", },
{ }
};
static bool qcom_scm_qseecom_machine_is_allowed(void)
{
struct device_node *np;
bool match;
np = of_find_node_by_path("/");
if (!np)
return false;
match = of_match_node(qcom_scm_qseecom_allowlist, np);
of_node_put(np);
return match;
}
static void qcom_scm_qseecom_free(void *data)
{
struct platform_device *qseecom_dev = data;
platform_device_del(qseecom_dev);
platform_device_put(qseecom_dev);
}
static int qcom_scm_qseecom_init(struct qcom_scm *scm)
{
struct platform_device *qseecom_dev;
u32 version;
int ret;
/*
* Note: We do two steps of validation here: First, we try to query the
* QSEECOM version as a check to see if the interface exists on this
* device. Second, we check against known good devices due to current
* driver limitations (see comment in qcom_scm_qseecom_allowlist).
*
* Note that we deliberately do the machine check after the version
* check so that we can log potentially supported devices. This should
* be safe as downstream sources indicate that the version query is
* neither blocking nor reentrant.
*/
ret = qcom_scm_qseecom_get_version(&version);
if (ret)
return 0;
dev_info(scm->dev, "qseecom: found qseecom with version 0x%x\n", version);
if (!qcom_scm_qseecom_machine_is_allowed()) {
dev_info(scm->dev, "qseecom: untested machine, skipping\n");
return 0;
}
/*
* Set up QSEECOM interface device. All application clients will be
* set up and managed by the corresponding driver for it.
*/
qseecom_dev = platform_device_alloc("qcom_qseecom", -1);
if (!qseecom_dev)
return -ENOMEM;
qseecom_dev->dev.parent = scm->dev;
ret = platform_device_add(qseecom_dev);
if (ret) {
platform_device_put(qseecom_dev);
return ret;
}
return devm_add_action_or_reset(scm->dev, qcom_scm_qseecom_free, qseecom_dev);
}
#else /* CONFIG_QCOM_QSEECOM */
static int qcom_scm_qseecom_init(struct qcom_scm *scm)
{
return 0;
}
#endif /* CONFIG_QCOM_QSEECOM */
/**
* qcom_scm_is_available() - Checks if SCM is available
*/
@ -1468,6 +1849,19 @@ static int qcom_scm_probe(struct platform_device *pdev)
if (download_mode)
qcom_scm_set_download_mode(true);
/*
* Initialize the QSEECOM interface.
*
* Note: QSEECOM is fairly self-contained and this only adds the
* interface device (the driver of which does most of the heavy
* lifting). So any errors returned here should be either -ENOMEM or
* -EINVAL (with the latter only in case there's a bug in our code).
* This means that there is no need to bring down the whole SCM driver.
* Just log the error instead and let SCM live.
*/
ret = qcom_scm_qseecom_init(scm);
WARN(ret < 0, "failed to initialize qseecom: %d\n", ret);
return 0;
}

11
drivers/soc/qcom/socinfo.c
View File

@ -117,6 +117,12 @@ static const char *const pmic_models[] = {
[55] = "PM2250",
[58] = "PM8450",
[65] = "PM8010",
[69] = "PM8550VS",
[70] = "PM8550VE",
[71] = "PM8550B",
[72] = "PMR735D",
[73] = "PM8550",
[74] = "PMK8550",
};
struct socinfo_params {
@ -349,6 +355,7 @@ static const struct soc_id soc_id[] = {
{ qcom_board_id(SDA439) },
{ qcom_board_id(SDA429) },
{ qcom_board_id(SM7150) },
{ qcom_board_id(SM7150P) },
{ qcom_board_id(IPQ8070) },
{ qcom_board_id(IPQ8071) },
{ qcom_board_id(QM215) },
@ -359,6 +366,9 @@ static const struct soc_id soc_id[] = {
{ qcom_board_id(SM6125) },
{ qcom_board_id(IPQ8070A) },
{ qcom_board_id(IPQ8071A) },
{ qcom_board_id(IPQ8172) },
{ qcom_board_id(IPQ8173) },
{ qcom_board_id(IPQ8174) },
{ qcom_board_id(IPQ6018) },
{ qcom_board_id(IPQ6028) },
{ qcom_board_id(SDM429W) },
@ -389,6 +399,7 @@ static const struct soc_id soc_id[] = {
{ qcom_board_id_named(SM8450_3, "SM8450") },
{ qcom_board_id(SC7280) },
{ qcom_board_id(SC7180P) },
{ qcom_board_id(QCM6490) },
{ qcom_board_id(IPQ5000) },
{ qcom_board_id(IPQ0509) },
{ qcom_board_id(IPQ0518) },

1
drivers/soc/qcom/wcnss_ctrl.c
View File

@ -355,7 +355,6 @@ static struct rpmsg_driver wcnss_ctrl_driver = {
.callback = wcnss_ctrl_smd_callback,
.drv = {
.name = "qcom_wcnss_ctrl",
.owner = THIS_MODULE,
.of_match_table = wcnss_ctrl_of_match,
},
};

5
include/dt-bindings/arm/qcom,ids.h
View File

@ -193,6 +193,7 @@
#define QCOM_ID_SDA439 363
#define QCOM_ID_SDA429 364
#define QCOM_ID_SM7150 365
#define QCOM_ID_SM7150P 366
#define QCOM_ID_IPQ8070 375
#define QCOM_ID_IPQ8071 376
#define QCOM_ID_QM215 386
@ -203,6 +204,9 @@
#define QCOM_ID_SM6125 394
#define QCOM_ID_IPQ8070A 395
#define QCOM_ID_IPQ8071A 396
#define QCOM_ID_IPQ8172 397
#define QCOM_ID_IPQ8173 398
#define QCOM_ID_IPQ8174 399
#define QCOM_ID_IPQ6018 402
#define QCOM_ID_IPQ6028 403
#define QCOM_ID_SDM429W 416
@ -233,6 +237,7 @@
#define QCOM_ID_SM8450_3 482
#define QCOM_ID_SC7280 487
#define QCOM_ID_SC7180P 495
#define QCOM_ID_QCM6490 497
#define QCOM_ID_IPQ5000 503
#define QCOM_ID_IPQ0509 504
#define QCOM_ID_IPQ0518 505

46
include/linux/firmware/qcom/qcom_qseecom.h Normal file
View File

@ -0,0 +1,46 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Driver for Qualcomm Secure Execution Environment (SEE) interface (QSEECOM).
* Responsible for setting up and managing QSEECOM client devices.
*
* Copyright (C) 2023 Maximilian Luz <luzmaximilian@gmail.com>
*/
#include <linux/auxiliary_bus.h>
#include <linux/types.h>
#include <linux/firmware/qcom/qcom_scm.h>
/**
* struct qseecom_client - QSEECOM client device.
* @aux_dev: Underlying auxiliary device.
* @app_id: ID of the loaded application.
*/
struct qseecom_client {
struct auxiliary_device aux_dev;
u32 app_id;
};
/**
* qcom_qseecom_app_send() - Send to and receive data from a given QSEE app.
* @client: The QSEECOM client associated with the target app.
* @req: Request buffer sent to the app (must be DMA-mappable).
* @req_size: Size of the request buffer.
* @rsp: Response buffer, written to by the app (must be DMA-mappable).
* @rsp_size: Size of the response buffer.
*
* Sends a request to the QSEE app associated with the given client and read
* back its response. The caller must provide two DMA memory regions, one for
* the request and one for the response, and fill out the @req region with the
* respective (app-specific) request data. The QSEE app reads this and returns
* its response in the @rsp region.
*
* Note: This is a convenience wrapper around qcom_scm_qseecom_app_send().
* Clients should prefer to use this wrapper.
*
* Return: Zero on success, nonzero on failure.
*/
static inline int qcom_qseecom_app_send(struct qseecom_client *client, void *req, size_t req_size,
void *rsp, size_t rsp_size)
{
return qcom_scm_qseecom_app_send(client->app_id, req, req_size, rsp, rsp_size);
}

22
include/linux/firmware/qcom/qcom_scm.h
View File

@ -122,4 +122,26 @@ extern int qcom_scm_lmh_dcvsh(u32 payload_fn, u32 payload_reg, u32 payload_val,
extern int qcom_scm_lmh_profile_change(u32 profile_id);
extern bool qcom_scm_lmh_dcvsh_available(void);
#ifdef CONFIG_QCOM_QSEECOM
int qcom_scm_qseecom_app_get_id(const char *app_name, u32 *app_id);
int qcom_scm_qseecom_app_send(u32 app_id, void *req, size_t req_size, void *rsp,
size_t rsp_size);
#else /* CONFIG_QCOM_QSEECOM */
static inline int qcom_scm_qseecom_app_get_id(const char *app_name, u32 *app_id)
{
return -EINVAL;
}
static inline int qcom_scm_qseecom_app_send(u32 app_id, void *req,
size_t req_size, void *rsp,
size_t rsp_size)
{
return -EINVAL;
}
#endif /* CONFIG_QCOM_QSEECOM */
#endif

1
include/linux/ucs2_string.h
View File

@ -10,6 +10,7 @@ typedef u16 ucs2_char_t;
unsigned long ucs2_strnlen(const ucs2_char_t *s, size_t maxlength);
unsigned long ucs2_strlen(const ucs2_char_t *s);
unsigned long ucs2_strsize(const ucs2_char_t *data, unsigned long maxlength);
ssize_t ucs2_strscpy(ucs2_char_t *dst, const ucs2_char_t *src, size_t count);
int ucs2_strncmp(const ucs2_char_t *a, const ucs2_char_t *b, size_t len);
unsigned long ucs2_utf8size(const ucs2_char_t *src);

52
lib/ucs2_string.c
View File

@ -32,6 +32,58 @@ ucs2_strsize(const ucs2_char_t *data, unsigned long maxlength)
}
EXPORT_SYMBOL(ucs2_strsize);
/**
* ucs2_strscpy() - Copy a UCS2 string into a sized buffer.
*
* @dst: Pointer to the destination buffer where to copy the string to.
* @src: Pointer to the source buffer where to copy the string from.
* @count: Size of the destination buffer, in UCS2 (16-bit) characters.
*
* Like strscpy(), only for UCS2 strings.
*
* Copy the source string @src, or as much of it as fits, into the destination
* buffer @dst. The behavior is undefined if the string buffers overlap. The
* destination buffer @dst is always NUL-terminated, unless it's zero-sized.
*
* Return: The number of characters copied into @dst (excluding the trailing
* %NUL terminator) or -E2BIG if @count is 0 or @src was truncated due to the
* destination buffer being too small.
*/
ssize_t ucs2_strscpy(ucs2_char_t *dst, const ucs2_char_t *src, size_t count)
{
long res;
/*
* Ensure that we have a valid amount of space. We need to store at
* least one NUL-character.
*/
if (count == 0 || WARN_ON_ONCE(count > INT_MAX / sizeof(*dst)))
return -E2BIG;
/*
* Copy at most 'count' characters, return early if we find a
* NUL-terminator.
*/
for (res = 0; res < count; res++) {
ucs2_char_t c;
c = src[res];
dst[res] = c;
if (!c)
return res;
}
/*
* The loop above terminated without finding a NUL-terminator,
* exceeding the 'count': Enforce proper NUL-termination and return
* error.
*/
dst[count - 1] = 0;
return -E2BIG;
}
EXPORT_SYMBOL(ucs2_strscpy);
int
ucs2_strncmp(const ucs2_char_t *a, const ucs2_char_t *b, size_t len)
{