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firmware: qcom: qseecom: convert to using the TZ allocator 

Drop the DMA mapping operations from qcom_scm_qseecom_app_send() and
convert all users of it in the qseecom module to using the TZ allocator
for creating SCM call buffers. As this is largely a module separate from
the SCM driver, let's use a separate memory pool. Set the initial size to
4K and - if we run out - add twice the current amount to the pool.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Elliot Berman <quic_eberman@quicinc.com>
Reviewed-by: Amirreza Zarrabi <quic_azarrabi@quicinc.com>
Link: https://lore.kernel.org/r/20240527-shm-bridge-v10-9-ce7afaa58d3a@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This commit is contained in:
Bartosz Golaszewski 2024-05-27 14:54:59 +02:00 committed by Bjorn Andersson
parent bd6ad954e7
commit 6612103ec3
4 changed files with 117 additions and 172 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

256
drivers/firmware/qcom/qcom_qseecom_uefisecapp.c
View File

@ -13,11 +13,14 @@
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/sizes.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/ucs2_string.h>
#include <linux/firmware/qcom/qcom_qseecom.h>
#include <linux/firmware/qcom/qcom_scm.h>
#include <linux/firmware/qcom/qcom_tzmem.h>
/* -- Qualcomm "uefisecapp" interface definitions. -------------------------- */
@ -272,6 +275,7 @@ struct qsee_rsp_uefi_query_variable_info {
struct qcuefi_client {
struct qseecom_client *client;
struct efivars efivars;
struct qcom_tzmem_pool *mempool;
};
static struct device *qcuefi_dev(struct qcuefi_client *qcuefi)
@ -293,12 +297,11 @@ static efi_status_t qsee_uefi_get_variable(struct qcuefi_client *qcuefi, const e
{
struct qsee_req_uefi_get_variable *req_data;
struct qsee_rsp_uefi_get_variable *rsp_data;
void *cmd_buf __free(qcom_tzmem) = NULL;
unsigned long buffer_size = *data_size;
efi_status_t efi_status = EFI_SUCCESS;
unsigned long name_length;
dma_addr_t cmd_buf_dma;
efi_status_t efi_status;
size_t cmd_buf_size;
void *cmd_buf;
size_t guid_offs;
size_t name_offs;
size_t req_size;
@ -333,11 +336,9 @@ static efi_status_t qsee_uefi_get_variable(struct qcuefi_client *qcuefi, const e
__reqdata_offs(rsp_size, &rsp_offs)
);
cmd_buf = qseecom_dma_alloc(qcuefi->client, cmd_buf_size, &cmd_buf_dma, GFP_KERNEL);
if (!cmd_buf) {
efi_status = EFI_OUT_OF_RESOURCES;
goto out;
}
cmd_buf = qcom_tzmem_alloc(qcuefi->mempool, cmd_buf_size, GFP_KERNEL);
if (!cmd_buf)
return EFI_OUT_OF_RESOURCES;
req_data = cmd_buf + req_offs;
rsp_data = cmd_buf + rsp_offs;
@ -351,30 +352,22 @@ static efi_status_t qsee_uefi_get_variable(struct qcuefi_client *qcuefi, const e
req_data->length = req_size;
status = ucs2_strscpy(((void *)req_data) + req_data->name_offset, name, name_length);
if (status < 0) {
efi_status = EFI_INVALID_PARAMETER;
goto out_free;
}
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,
cmd_buf_dma + req_offs, req_size,
cmd_buf_dma + rsp_offs, rsp_size);
if (status) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
cmd_buf + req_offs, req_size,
cmd_buf + rsp_offs, rsp_size);
if (status)
return EFI_DEVICE_ERROR;
if (rsp_data->command_id != QSEE_CMD_UEFI_GET_VARIABLE) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->command_id != QSEE_CMD_UEFI_GET_VARIABLE)
return EFI_DEVICE_ERROR;
if (rsp_data->length < sizeof(*rsp_data)) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->length < sizeof(*rsp_data))
return EFI_DEVICE_ERROR;
if (rsp_data->status) {
dev_dbg(qcuefi_dev(qcuefi), "%s: uefisecapp error: 0x%x\n",
@ -388,18 +381,14 @@ static efi_status_t qsee_uefi_get_variable(struct qcuefi_client *qcuefi, const e
*attributes = rsp_data->attributes;
}
goto out_free;
return qsee_uefi_status_to_efi(rsp_data->status);
}
if (rsp_data->length > rsp_size) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->length > rsp_size)
return EFI_DEVICE_ERROR;
if (rsp_data->data_offset + rsp_data->data_size > rsp_data->length) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->data_offset + rsp_data->data_size > rsp_data->length)
return EFI_DEVICE_ERROR;
/*
* Note: We need to set attributes and data size even if the buffer is
@ -422,22 +411,15 @@ static efi_status_t qsee_uefi_get_variable(struct qcuefi_client *qcuefi, const e
if (attributes)
*attributes = rsp_data->attributes;
if (buffer_size == 0 && !data) {
efi_status = EFI_SUCCESS;
goto out_free;
}
if (buffer_size == 0 && !data)
return EFI_SUCCESS;
if (buffer_size < rsp_data->data_size) {
efi_status = EFI_BUFFER_TOO_SMALL;
goto out_free;
}
if (buffer_size < rsp_data->data_size)
return EFI_BUFFER_TOO_SMALL;
memcpy(data, ((void *)rsp_data) + rsp_data->data_offset, rsp_data->data_size);
out_free:
qseecom_dma_free(qcuefi->client, cmd_buf_size, cmd_buf, cmd_buf_dma);
out:
return efi_status;
return EFI_SUCCESS;
}
static efi_status_t qsee_uefi_set_variable(struct qcuefi_client *qcuefi, const efi_char16_t *name,
@ -446,11 +428,9 @@ static efi_status_t qsee_uefi_set_variable(struct qcuefi_client *qcuefi, const e
{
struct qsee_req_uefi_set_variable *req_data;
struct qsee_rsp_uefi_set_variable *rsp_data;
efi_status_t efi_status = EFI_SUCCESS;
void *cmd_buf __free(qcom_tzmem) = NULL;
unsigned long name_length;
dma_addr_t cmd_buf_dma;
size_t cmd_buf_size;
void *cmd_buf;
size_t name_offs;
size_t guid_offs;
size_t data_offs;
@ -486,11 +466,9 @@ static efi_status_t qsee_uefi_set_variable(struct qcuefi_client *qcuefi, const e
__reqdata_offs(sizeof(*rsp_data), &rsp_offs)
);
cmd_buf = qseecom_dma_alloc(qcuefi->client, cmd_buf_size, &cmd_buf_dma, GFP_KERNEL);
if (!cmd_buf) {
efi_status = EFI_OUT_OF_RESOURCES;
goto out;
}
cmd_buf = qcom_tzmem_alloc(qcuefi->mempool, cmd_buf_size, GFP_KERNEL);
if (!cmd_buf)
return EFI_OUT_OF_RESOURCES;
req_data = cmd_buf + req_offs;
rsp_data = cmd_buf + rsp_offs;
@ -506,10 +484,8 @@ static efi_status_t qsee_uefi_set_variable(struct qcuefi_client *qcuefi, const e
req_data->length = req_size;
status = ucs2_strscpy(((void *)req_data) + req_data->name_offset, name, name_length);
if (status < 0) {
efi_status = EFI_INVALID_PARAMETER;
goto out_free;
}
if (status < 0)
return EFI_INVALID_PARAMETER;
memcpy(((void *)req_data) + req_data->guid_offset, guid, req_data->guid_size);
@ -517,33 +493,24 @@ static efi_status_t qsee_uefi_set_variable(struct qcuefi_client *qcuefi, const e
memcpy(((void *)req_data) + req_data->data_offset, data, req_data->data_size);
status = qcom_qseecom_app_send(qcuefi->client,
cmd_buf_dma + req_offs, req_size,
cmd_buf_dma + rsp_offs, sizeof(*rsp_data));
if (status) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
cmd_buf + req_offs, req_size,
cmd_buf + rsp_offs, sizeof(*rsp_data));
if (status)
return EFI_DEVICE_ERROR;
if (rsp_data->command_id != QSEE_CMD_UEFI_SET_VARIABLE) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->command_id != QSEE_CMD_UEFI_SET_VARIABLE)
return EFI_DEVICE_ERROR;
if (rsp_data->length != sizeof(*rsp_data)) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->length != sizeof(*rsp_data))
return EFI_DEVICE_ERROR;
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);
return qsee_uefi_status_to_efi(rsp_data->status);
}
out_free:
qseecom_dma_free(qcuefi->client, cmd_buf_size, cmd_buf, cmd_buf_dma);
out:
return efi_status;
return EFI_SUCCESS;
}
static efi_status_t qsee_uefi_get_next_variable(struct qcuefi_client *qcuefi,
@ -552,10 +519,9 @@ static efi_status_t qsee_uefi_get_next_variable(struct qcuefi_client *qcuefi,
{
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;
dma_addr_t cmd_buf_dma;
void *cmd_buf __free(qcom_tzmem) = NULL;
efi_status_t efi_status;
size_t cmd_buf_size;
void *cmd_buf;
size_t guid_offs;
size_t name_offs;
size_t req_size;
@ -587,11 +553,9 @@ static efi_status_t qsee_uefi_get_next_variable(struct qcuefi_client *qcuefi,
__reqdata_offs(rsp_size, &rsp_offs)
);
cmd_buf = qseecom_dma_alloc(qcuefi->client, cmd_buf_size, &cmd_buf_dma, GFP_KERNEL);
if (!cmd_buf) {
efi_status = EFI_OUT_OF_RESOURCES;
goto out;
}
cmd_buf = qcom_tzmem_alloc(qcuefi->mempool, cmd_buf_size, GFP_KERNEL);
if (!cmd_buf)
return EFI_OUT_OF_RESOURCES;
req_data = cmd_buf + req_offs;
rsp_data = cmd_buf + rsp_offs;
@ -606,28 +570,20 @@ static efi_status_t qsee_uefi_get_next_variable(struct qcuefi_client *qcuefi,
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) {
efi_status = EFI_INVALID_PARAMETER;
goto out_free;
}
if (status < 0)
return EFI_INVALID_PARAMETER;
status = qcom_qseecom_app_send(qcuefi->client,
cmd_buf_dma + req_offs, req_size,
cmd_buf_dma + rsp_offs, rsp_size);
if (status) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
cmd_buf + req_offs, req_size,
cmd_buf + rsp_offs, rsp_size);
if (status)
return EFI_DEVICE_ERROR;
if (rsp_data->command_id != QSEE_CMD_UEFI_GET_NEXT_VARIABLE) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->command_id != QSEE_CMD_UEFI_GET_NEXT_VARIABLE)
return EFI_DEVICE_ERROR;
if (rsp_data->length < sizeof(*rsp_data)) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->length < sizeof(*rsp_data))
return EFI_DEVICE_ERROR;
if (rsp_data->status) {
dev_dbg(qcuefi_dev(qcuefi), "%s: uefisecapp error: 0x%x\n",
@ -642,53 +598,40 @@ static efi_status_t qsee_uefi_get_next_variable(struct qcuefi_client *qcuefi,
if (efi_status == EFI_BUFFER_TOO_SMALL)
*name_size = rsp_data->name_size;
goto out_free;
return efi_status;
}
if (rsp_data->length > rsp_size) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->length > rsp_size)
return EFI_DEVICE_ERROR;
if (rsp_data->name_offset + rsp_data->name_size > rsp_data->length) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->name_offset + rsp_data->name_size > rsp_data->length)
return EFI_DEVICE_ERROR;
if (rsp_data->guid_offset + rsp_data->guid_size > rsp_data->length) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->guid_offset + rsp_data->guid_size > rsp_data->length)
return EFI_DEVICE_ERROR;
if (rsp_data->name_size > *name_size) {
*name_size = rsp_data->name_size;
efi_status = EFI_BUFFER_TOO_SMALL;
goto out_free;
return EFI_BUFFER_TOO_SMALL;
}
if (rsp_data->guid_size != sizeof(*guid)) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->guid_size != sizeof(*guid))
return EFI_DEVICE_ERROR;
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) {
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.
*/
efi_status = EFI_DEVICE_ERROR;
}
return EFI_DEVICE_ERROR;
out_free:
qseecom_dma_free(qcuefi->client, cmd_buf_size, cmd_buf, cmd_buf_dma);
out:
return efi_status;
return EFI_SUCCESS;
}
static efi_status_t qsee_uefi_query_variable_info(struct qcuefi_client *qcuefi, u32 attr,
@ -697,10 +640,8 @@ static efi_status_t qsee_uefi_query_variable_info(struct qcuefi_client *qcuefi,
{
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;
dma_addr_t cmd_buf_dma;
void *cmd_buf __free(qcom_tzmem) = NULL;
size_t cmd_buf_size;
void *cmd_buf;
size_t req_offs;
size_t rsp_offs;
int status;
@ -710,11 +651,9 @@ static efi_status_t qsee_uefi_query_variable_info(struct qcuefi_client *qcuefi,
__reqdata_offs(sizeof(*rsp_data), &rsp_offs)
);
cmd_buf = qseecom_dma_alloc(qcuefi->client, cmd_buf_size, &cmd_buf_dma, GFP_KERNEL);
if (!cmd_buf) {
efi_status = EFI_OUT_OF_RESOURCES;
goto out;
}
cmd_buf = qcom_tzmem_alloc(qcuefi->mempool, cmd_buf_size, GFP_KERNEL);
if (!cmd_buf)
return EFI_OUT_OF_RESOURCES;
req_data = cmd_buf + req_offs;
rsp_data = cmd_buf + rsp_offs;
@ -724,28 +663,21 @@ static efi_status_t qsee_uefi_query_variable_info(struct qcuefi_client *qcuefi,
req_data->length = sizeof(*req_data);
status = qcom_qseecom_app_send(qcuefi->client,
cmd_buf_dma + req_offs, sizeof(*req_data),
cmd_buf_dma + rsp_offs, sizeof(*rsp_data));
if (status) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
cmd_buf + req_offs, sizeof(*req_data),
cmd_buf + rsp_offs, sizeof(*rsp_data));
if (status)
return EFI_DEVICE_ERROR;
if (rsp_data->command_id != QSEE_CMD_UEFI_QUERY_VARIABLE_INFO) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->command_id != QSEE_CMD_UEFI_QUERY_VARIABLE_INFO)
return EFI_DEVICE_ERROR;
if (rsp_data->length != sizeof(*rsp_data)) {
efi_status = EFI_DEVICE_ERROR;
goto out_free;
}
if (rsp_data->length != sizeof(*rsp_data))
return EFI_DEVICE_ERROR;
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;
return qsee_uefi_status_to_efi(rsp_data->status);
}
if (storage_space)
@ -757,10 +689,7 @@ static efi_status_t qsee_uefi_query_variable_info(struct qcuefi_client *qcuefi,
if (max_variable_size)
*max_variable_size = rsp_data->max_variable_size;
out_free:
qseecom_dma_free(qcuefi->client, cmd_buf_size, cmd_buf, cmd_buf_dma);
out:
return efi_status;
return EFI_SUCCESS;
}
/* -- Global efivar interface. ---------------------------------------------- */
@ -871,6 +800,7 @@ static const struct efivar_operations qcom_efivar_ops = {
static int qcom_uefisecapp_probe(struct auxiliary_device *aux_dev,
const struct auxiliary_device_id *aux_dev_id)
{
struct qcom_tzmem_pool_config pool_config;
struct qcuefi_client *qcuefi;
int status;
@ -889,6 +819,16 @@ static int qcom_uefisecapp_probe(struct auxiliary_device *aux_dev,
if (status)
qcuefi_set_reference(NULL);
memset(&pool_config, 0, sizeof(pool_config));
pool_config.initial_size = SZ_4K;
pool_config.policy = QCOM_TZMEM_POLICY_MULTIPLIER;
pool_config.increment = 2;
pool_config.max_size = SZ_256K;
qcuefi->mempool = devm_qcom_tzmem_pool_new(&aux_dev->dev, &pool_config);
if (IS_ERR(qcuefi->mempool))
return PTR_ERR(qcuefi->mempool);
return status;
}

17
drivers/firmware/qcom/qcom_scm.c
View File

@ -1601,9 +1601,9 @@ 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: DMA address of the request buffer sent to the app.
* @req: Request buffer sent to the app (must be TZ memory)
* @req_size: Size of the request buffer.
* @rsp: DMA address of the response buffer, written to by the app.
* @rsp: Response buffer, written to by the app (must be TZ memory)
* @rsp_size: Size of the response buffer.
*
* Sends a request to the QSEE app associated with the given ID and read back
@ -1614,13 +1614,18 @@ EXPORT_SYMBOL_GPL(qcom_scm_qseecom_app_get_id);
*
* Return: Zero on success, nonzero on failure.
*/
int qcom_scm_qseecom_app_send(u32 app_id, dma_addr_t req, size_t req_size,
dma_addr_t rsp, size_t rsp_size)
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 = {};
phys_addr_t req_phys;
phys_addr_t rsp_phys;
int status;
req_phys = qcom_tzmem_to_phys(req);
rsp_phys = qcom_tzmem_to_phys(rsp);
desc.owner = QSEECOM_TZ_OWNER_TZ_APPS;
desc.svc = QSEECOM_TZ_SVC_APP_ID_PLACEHOLDER;
desc.cmd = QSEECOM_TZ_CMD_APP_SEND;
@ -1628,9 +1633,9 @@ int qcom_scm_qseecom_app_send(u32 app_id, dma_addr_t req, size_t req_size,
QCOM_SCM_RW, QCOM_SCM_VAL,
QCOM_SCM_RW, QCOM_SCM_VAL);
desc.args[0] = app_id;
desc.args[1] = req;
desc.args[1] = req_phys;
desc.args[2] = req_size;
desc.args[3] = rsp;
desc.args[3] = rsp_phys;
desc.args[4] = rsp_size;
status = qcom_scm_qseecom_call(&desc, &res);

8
include/linux/firmware/qcom/qcom_qseecom.h
View File

@ -73,9 +73,9 @@ static inline void qseecom_dma_free(struct qseecom_client *client, size_t size,
/**
* qcom_qseecom_app_send() - Send to and receive data from a given QSEE app.
* @client: The QSEECOM client associated with the target app.
* @req: DMA address of the request buffer sent to the app.
* @req: Request buffer sent to the app (must be TZ memory).
* @req_size: Size of the request buffer.
* @rsp: DMA address of the response buffer, written to by the app.
* @rsp: Response buffer, written to by the app (must be TZ memory).
* @rsp_size: Size of the response buffer.
*
* Sends a request to the QSEE app associated with the given client and read
@ -90,8 +90,8 @@ static inline void qseecom_dma_free(struct qseecom_client *client, size_t size,
* Return: Zero on success, nonzero on failure.
*/
static inline int qcom_qseecom_app_send(struct qseecom_client *client,
dma_addr_t req, size_t req_size,
dma_addr_t rsp, size_t rsp_size)
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);
}

8
include/linux/firmware/qcom/qcom_scm.h
View File

@ -141,8 +141,8 @@ int qcom_scm_gpu_init_regs(u32 gpu_req);
#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, dma_addr_t req, size_t req_size,
dma_addr_t rsp, size_t rsp_size);
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 */
@ -152,8 +152,8 @@ static inline int qcom_scm_qseecom_app_get_id(const char *app_name, u32 *app_id)
}
static inline int qcom_scm_qseecom_app_send(u32 app_id,
dma_addr_t req, size_t req_size,
dma_addr_t rsp, size_t rsp_size)
void *req, size_t req_size,
void *rsp, size_t rsp_size)
{
return -EINVAL;
}