media: firmware: qcom_scm: Add memory protect virtual address ranges

This adds a new SCM memprotect command to set virtual address ranges.
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Reviewed-by: Elliot Berman <eberman@codeaurora.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/firmware/qcom_scm.c

@@ -756,6 +756,30 @@ int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare)
 }
 EXPORT_SYMBOL(qcom_scm_iommu_secure_ptbl_init);
 
+int qcom_scm_mem_protect_video_var(u32 cp_start, u32 cp_size,
+				   u32 cp_nonpixel_start,
+				   u32 cp_nonpixel_size)
+{
+	int ret;
+	struct qcom_scm_desc desc = {
+		.svc = QCOM_SCM_SVC_MP,
+		.cmd = QCOM_SCM_MP_VIDEO_VAR,
+		.arginfo = QCOM_SCM_ARGS(4, QCOM_SCM_VAL, QCOM_SCM_VAL,
+					 QCOM_SCM_VAL, QCOM_SCM_VAL),
+		.args[0] = cp_start,
+		.args[1] = cp_size,
+		.args[2] = cp_nonpixel_start,
+		.args[3] = cp_nonpixel_size,
+		.owner = ARM_SMCCC_OWNER_SIP,
+	};
+	struct qcom_scm_res res;
+
+	ret = qcom_scm_call(__scm->dev, &desc, &res);
+
+	return ret ? : res.result[0];
+}
+EXPORT_SYMBOL(qcom_scm_mem_protect_video_var);
+
 static int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region,
 				 size_t mem_sz, phys_addr_t src, size_t src_sz,
 				 phys_addr_t dest, size_t dest_sz)

drivers/firmware/qcom_scm.h

@@ -97,6 +97,7 @@ extern int scm_legacy_call(struct device *dev, const struct qcom_scm_desc *desc,
 #define QCOM_SCM_MP_RESTORE_SEC_CFG		0x02
 #define QCOM_SCM_MP_IOMMU_SECURE_PTBL_SIZE	0x03
 #define QCOM_SCM_MP_IOMMU_SECURE_PTBL_INIT	0x04
+#define QCOM_SCM_MP_VIDEO_VAR			0x08
 #define QCOM_SCM_MP_ASSIGN			0x16
 
 #define QCOM_SCM_SVC_OCMEM		0x0f

include/linux/qcom_scm.h

@@ -84,6 +84,9 @@ extern bool qcom_scm_restore_sec_cfg_available(void);
 extern int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare);
 extern int qcom_scm_iommu_secure_ptbl_size(u32 spare, size_t *size);
 extern int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare);
+extern int qcom_scm_mem_protect_video_var(u32 cp_start, u32 cp_size,
+					  u32 cp_nonpixel_start,
+					  u32 cp_nonpixel_size);
 extern int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
 			       unsigned int *src,
 			       const struct qcom_scm_vmperm *newvm,
@@ -141,6 +144,10 @@ static inline int qcom_scm_iommu_secure_ptbl_size(u32 spare, size_t *size)
 		{ return -ENODEV; }
 static inline int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare)
 		{ return -ENODEV; }
+extern inline int qcom_scm_mem_protect_video_var(u32 cp_start, u32 cp_size,
+						 u32 cp_nonpixel_start,
+						 u32 cp_nonpixel_size)
+		{ return -ENODEV; }
 static inline int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
 		unsigned int *src, const struct qcom_scm_vmperm *newvm,
 		unsigned int dest_cnt) { return -ENODEV; }