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>

4 files changed, 117 insertions, 172 deletions

diff --git a/drivers/firmware/qcom/qcom_qseecom_uefisecapp.c b/drivers/firmware/qcom/qcom_qseecom_uefisecapp.c
index bc550ad0dbe0..6fefa4fe80e8 100644
--- a/drivers/firmware/qcom/qcom_qseecom_uefisecapp.c
+++ b/drivers/firmware/qcom/qcom_qseecom_uefisecapp.c
@@ -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;
 }
 
diff --git a/drivers/firmware/qcom/qcom_scm.c b/drivers/firmware/qcom/qcom_scm.c
index aeb81afb9606..43676a680de2 100644
--- a/drivers/firmware/qcom/qcom_scm.c
+++ b/drivers/firmware/qcom/qcom_scm.c
@@ -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);
diff --git a/include/linux/firmware/qcom/qcom_qseecom.h b/include/linux/firmware/qcom/qcom_qseecom.h
index 366243ee9609..1dc5b3b50aa9 100644
--- a/include/linux/firmware/qcom/qcom_qseecom.h
+++ b/include/linux/firmware/qcom/qcom_qseecom.h
@@ -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);
 }
diff --git a/include/linux/firmware/qcom/qcom_scm.h b/include/linux/firmware/qcom/qcom_scm.h
index a221a643dc12..77be72d40200 100644
--- a/include/linux/firmware/qcom/qcom_scm.h
+++ b/include/linux/firmware/qcom/qcom_scm.h
@@ -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;
 }