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Message-ID: <20230802140606.2041889-8-quic_mmanikan@quicinc.com>
Date: Wed, 2 Aug 2023 19:36:02 +0530
From: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
To: <agross@...nel.org>, <andersson@...nel.org>,
<konrad.dybcio@...aro.org>, <mathieu.poirier@...aro.org>,
<robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
<conor+dt@...nel.org>, <mturquette@...libre.com>,
<sboyd@...nel.org>, <quic_eberman@...cinc.com>,
<quic_gurus@...cinc.com>, <kvalo@...nel.org>,
<quic_mmanikan@...cinc.com>, <loic.poulain@...aro.org>,
<linux-arm-msm@...r.kernel.org>,
<linux-remoteproc@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-clk@...r.kernel.org>
CC: <quic_srichara@...cinc.com>, <quic_sjaganat@...cinc.com>,
<quic_kathirav@...cinc.com>, <quic_anusha@...cinc.com>,
<quic_varada@...cinc.com>
Subject: [PATCH v5 07/11] firmware: qcom_scm: ipq5332: add msa lock/unlock support
IPQ5332 user pd remoteproc firmwares need to be locked
with MSA(modem secure access) features. This patch add
support to lock/unlock MSA features.
Signed-off-by: Manikanta Mylavarapu <quic_mmanikan@...cinc.com>
---
Changes in v5:
- Moved to EXPORT_SYMBOL_GPL() because scm driver moved to
using EXPORT_SYMBOL_GPL() now.
Changes in v4:
- Rebased on linux-next
drivers/firmware/qcom_scm.c | 78 ++++++++++++++++++++++++++
drivers/firmware/qcom_scm.h | 2 +
include/linux/firmware/qcom/qcom_scm.h | 2 +
3 files changed, 82 insertions(+)
diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 5e1ff137ab52..ae5c6e495e19 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -676,6 +676,84 @@ bool qcom_scm_pas_supported(u32 peripheral)
}
EXPORT_SYMBOL_GPL(qcom_scm_pas_supported);
+/**
+ * qcom_scm_msa_lock() - Lock given peripheral firmware region as MSA
+ *
+ * @peripheral: peripheral id
+ *
+ * Return 0 on success.
+ */
+int qcom_scm_msa_lock(u32 peripheral)
+{
+ int ret;
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_PIL,
+ .cmd = QCOM_SCM_MSA_LOCK,
+ .arginfo = QCOM_SCM_ARGS(1),
+ .args[0] = peripheral,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+ struct qcom_scm_res res;
+
+ if (!__qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_PIL,
+ QCOM_SCM_MSA_LOCK))
+ return 0;
+
+ ret = qcom_scm_clk_enable();
+ if (ret)
+ return ret;
+
+ ret = qcom_scm_bw_enable();
+ if (ret)
+ return ret;
+
+ ret = qcom_scm_call(__scm->dev, &desc, &res);
+ qcom_scm_bw_disable();
+ qcom_scm_clk_disable();
+
+ return ret ? : res.result[0];
+}
+EXPORT_SYMBOL_GPL(qcom_scm_msa_lock);
+
+/**
+ * qcom_scm_msa_unlock() - Unlock given peripheral MSA firmware region
+ *
+ * @peripheral: peripheral id
+ *
+ * Return 0 on success.
+ */
+int qcom_scm_msa_unlock(u32 peripheral)
+{
+ int ret;
+ struct qcom_scm_desc desc = {
+ .svc = QCOM_SCM_SVC_PIL,
+ .cmd = QCOM_SCM_MSA_UNLOCK,
+ .arginfo = QCOM_SCM_ARGS(1),
+ .args[0] = peripheral,
+ .owner = ARM_SMCCC_OWNER_SIP,
+ };
+ struct qcom_scm_res res;
+
+ if (!__qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_PIL,
+ QCOM_SCM_MSA_UNLOCK))
+ return 0;
+
+ ret = qcom_scm_clk_enable();
+ if (ret)
+ return ret;
+
+ ret = qcom_scm_bw_enable();
+ if (ret)
+ return ret;
+
+ ret = qcom_scm_call(__scm->dev, &desc, &res);
+ qcom_scm_bw_disable();
+ qcom_scm_clk_disable();
+
+ return ret ? : res.result[0];
+}
+EXPORT_SYMBOL_GPL(qcom_scm_msa_unlock);
+
static int __qcom_scm_pas_mss_reset(struct device *dev, bool reset)
{
struct qcom_scm_desc desc = {
diff --git a/drivers/firmware/qcom_scm.h b/drivers/firmware/qcom_scm.h
index 6ab5e7c77e8d..9480b0b57c3d 100644
--- a/drivers/firmware/qcom_scm.h
+++ b/drivers/firmware/qcom_scm.h
@@ -97,6 +97,8 @@ extern int scm_legacy_call(struct device *dev, const struct qcom_scm_desc *desc,
#define QCOM_SCM_PIL_PAS_SHUTDOWN 0x06
#define QCOM_SCM_PIL_PAS_IS_SUPPORTED 0x07
#define QCOM_SCM_PIL_PAS_MSS_RESET 0x0a
+#define QCOM_SCM_MSA_LOCK 0x24
+#define QCOM_SCM_MSA_UNLOCK 0x25
#define QCOM_SCM_SVC_IO 0x05
#define QCOM_SCM_IO_READ 0x01
diff --git a/include/linux/firmware/qcom/qcom_scm.h b/include/linux/firmware/qcom/qcom_scm.h
index 0c091a3f6d49..58c476941e71 100644
--- a/include/linux/firmware/qcom/qcom_scm.h
+++ b/include/linux/firmware/qcom/qcom_scm.h
@@ -81,6 +81,8 @@ extern int qcom_scm_pas_mem_setup(u32 peripheral, phys_addr_t addr,
extern int qcom_scm_pas_auth_and_reset(u32 peripheral);
extern int qcom_scm_pas_shutdown(u32 peripheral);
extern bool qcom_scm_pas_supported(u32 peripheral);
+extern int qcom_scm_msa_lock(u32 peripheral);
+extern int qcom_scm_msa_unlock(u32 peripheral);
extern int qcom_scm_io_readl(phys_addr_t addr, unsigned int *val);
extern int qcom_scm_io_writel(phys_addr_t addr, unsigned int val);
--
2.34.1
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