[PATCH 2/4] WIP: qcom-scm: add ocmem dump support

[Rob Clark]

Seems so far not to be required, at least for gpu.  Just stuffing it in
a patch since I wrote the code and someone might want to resurrect this
at some later time.

Signed-off-by: Rob Clark <robdclark at gmail.com>
---
 drivers/firmware/qcom_scm-32.c | 32 +++++++++++++++++++++++++
 drivers/firmware/qcom_scm-64.c | 10 ++++++++
 drivers/firmware/qcom_scm.c    | 54 ++++++++++++++++++++++++++++++++++++++++++
 drivers/firmware/qcom_scm.h    |  4 ++++
 include/linux/qcom_scm.h       |  4 ++++
 5 files changed, 104 insertions(+)

diff --git a/drivers/firmware/qcom_scm-32.c b/drivers/firmware/qcom_scm-32.c
index 656d8fe..287041a 100644
--- a/drivers/firmware/qcom_scm-32.c
+++ b/drivers/firmware/qcom_scm-32.c
@@ -557,6 +557,38 @@ int __qcom_scm_ocmem_unlock(uint32_t id, uint32_t offset, uint32_t size)
 			&request, sizeof(request), NULL, 0);
 }
 
+int __qcom_scm_ocmem_enable_dump(uint32_t id, uint32_t offset, uint32_t size)
+{
+	struct ocmem_tz_en_dump {
+		u32 id;
+		u32 offset;
+		u32 size;
+	} request;
+
+	request.id = id;
+	request.offset = offset;
+	request.size = size;
+
+	return qcom_scm_call(QCOM_SCM_OCMEM_SVC, QCOM_SCM_OCMEM_ENABLE_DUMP_CMD,
+			&request, sizeof(request), NULL, 0);
+}
+
+int __qcom_scm_ocmem_disable_dump(uint32_t id, uint32_t offset, uint32_t size)
+{
+	struct ocmem_tz_dis_dump {
+		u32 id;
+		u32 offset;
+		u32 size;
+	} request;
+
+	request.id = id;
+	request.offset = offset;
+	request.size = size;
+
+	return qcom_scm_call(QCOM_SCM_OCMEM_SVC, QCOM_SCM_OCMEM_DISABLE_DUMP_CMD,
+			&request, sizeof(request), NULL, 0);
+}
+
 bool __qcom_scm_pas_supported(u32 peripheral)
 {
 	__le32 out;
diff --git a/drivers/firmware/qcom_scm-64.c b/drivers/firmware/qcom_scm-64.c
index ef5c59e..fc02828 100644
--- a/drivers/firmware/qcom_scm-64.c
+++ b/drivers/firmware/qcom_scm-64.c
@@ -78,6 +78,16 @@ int __qcom_scm_ocmem_unlock(uint32_t id, uint32_t offset, uint32_t size)
 	return -ENOTSUPP;
 }
 
+int __qcom_scm_ocmem_enable_dump(uint32_t id, uint32_t offset, uint32_t size)
+{
+	return -ENOTSUPP;
+}
+
+int __qcom_scm_ocmem_disable_dump(uint32_t id, uint32_t offset, uint32_t size)
+{
+	return -ENOTSUPP;
+}
+
 bool __qcom_scm_pas_supported(u32 peripheral)
 {
 	return false;
diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 59b1007..b15b0d8 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -260,6 +260,60 @@ int qcom_scm_ocmem_unlock(uint32_t id, uint32_t offset, uint32_t size)
 EXPORT_SYMBOL(qcom_scm_ocmem_unlock);
 
 /**
+ *
+ */
+bool qcom_scm_ocmem_dump_available(void)
+{
+	int ret = qcom_scm_clk_enable();
+
+	if (ret)
+		goto clk_err;
+
+	ret = __qcom_scm_is_call_available(QCOM_SCM_OCMEM_SVC,
+			QCOM_SCM_OCMEM_ENABLE_DUMP_CMD);
+
+	qcom_scm_clk_disable();
+
+clk_err:
+	return (ret > 0) ? true : false;
+}
+EXPORT_SYMBOL(qcom_scm_ocmem_dump_available);
+
+/**
+ *
+ */
+int qcom_scm_ocmem_enable_dump(uint32_t id, uint32_t offset, uint32_t size)
+{
+	int ret = qcom_scm_clk_enable();
+
+	if (ret)
+		return ret;
+
+	ret = __qcom_scm_ocmem_enable_dump(id, offset, size);
+	qcom_scm_clk_disable();
+
+	return ret;
+}
+EXPORT_SYMBOL(qcom_scm_ocmem_enable_dump);
+
+/**
+ *
+ */
+int qcom_scm_ocmem_disable_dump(uint32_t id, uint32_t offset, uint32_t size)
+{
+	int ret = qcom_scm_clk_enable();
+
+	if (ret)
+		return ret;
+
+	ret = __qcom_scm_ocmem_disable_dump(id, offset, size);
+	qcom_scm_clk_disable();
+
+	return ret;
+}
+EXPORT_SYMBOL(qcom_scm_ocmem_disable_dump);
+
+/**
  * qcom_scm_pas_supported() - Check if the peripheral authentication service is
  *			      available for the given peripherial
  * @peripheral:	peripheral id
diff --git a/drivers/firmware/qcom_scm.h b/drivers/firmware/qcom_scm.h
index e01656f3..a090236 100644
--- a/drivers/firmware/qcom_scm.h
+++ b/drivers/firmware/qcom_scm.h
@@ -44,10 +44,14 @@ extern int __qcom_scm_ocmem_secure_cfg(unsigned sec_id);
 #define QCOM_SCM_OCMEM_SVC			0xf
 #define QCOM_SCM_OCMEM_LOCK_CMD		0x1
 #define QCOM_SCM_OCMEM_UNLOCK_CMD		0x2
+#define QCOM_SCM_OCMEM_ENABLE_DUMP_CMD		0x3
+#define QCOM_SCM_OCMEM_DISABLE_DUMP_CMD	0x4
 
 extern int __qcom_scm_ocmem_lock(uint32_t id, uint32_t offset, uint32_t size,
 		uint32_t mode);
 extern int __qcom_scm_ocmem_unlock(uint32_t id, uint32_t offset, uint32_t size);
+extern int __qcom_scm_ocmem_enable_dump(uint32_t id, uint32_t offset, uint32_t size);
+extern int __qcom_scm_ocmem_disable_dump(uint32_t id, uint32_t offset, uint32_t size);
 
 #define QCOM_SCM_SVC_PIL		0x2
 #define QCOM_SCM_PAS_INIT_IMAGE_CMD	0x1
diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h
index a934457..bdbbbdf 100644
--- a/include/linux/qcom_scm.h
+++ b/include/linux/qcom_scm.h
@@ -37,6 +37,10 @@ extern int qcom_scm_ocmem_lock(uint32_t id, uint32_t offset, uint32_t size,
 		uint32_t mode);
 extern int qcom_scm_ocmem_unlock(uint32_t id, uint32_t offset, uint32_t size);
 
+extern bool qcom_scm_ocmem_dump_available(void);
+extern int qcom_scm_ocmem_enable_dump(uint32_t id, uint32_t offset, uint32_t size);
+extern int qcom_scm_ocmem_disable_dump(uint32_t id, uint32_t offset, uint32_t size);
+
 extern bool qcom_scm_pas_supported(u32 peripheral);
 extern int qcom_scm_pas_init_image(u32 peripheral, const void *metadata, size_t size);
 extern int qcom_scm_pas_mem_setup(u32 peripheral, phys_addr_t addr, phys_addr_t size);
-- 
2.4.3