diff mbox series

[v6,4/7] firmware: qcom: scm: add support to restore secure config to qcm_scm-32

Message ID 20190822143703.13030-5-masneyb@onstation.org (mailing list archive)
State Superseded
Headers show
Series qcom: add OCMEM support | expand

Commit Message

Brian Masney Aug. 22, 2019, 2:37 p.m. UTC
From: Rob Clark <robdclark@gmail.com>

Add support to restore the secure configuration for qcm_scm-32.c. This
is needed by the On Chip MEMory (OCMEM) that is present on some
Snapdragon devices.

Signed-off-by: Rob Clark <robdclark@gmail.com>
[masneyb@onstation.org: ported to latest kernel; set ctx_bank_num to
 spare parameter.]
Signed-off-by: Brian Masney <masneyb@onstation.org>
---
Changes since v5:
- None

Changes since v4:
- None

Changes since v3:
- None

Changes since v2:
- None

Changes since v1:
- Use existing __qcom_scm_restore_sec_cfg() function stub in
  qcom_scm-32.c that was unimplemented
- Set the cfg.ctx_bank_num to the spare function parameter. It was
  previously set to the device_id.

 drivers/firmware/qcom_scm-32.c | 17 ++++++++++++++++-
 drivers/firmware/qcom_scm.c    | 13 +++++++++++++
 include/linux/qcom_scm.h       | 11 +++++++++++
 3 files changed, 40 insertions(+), 1 deletion(-)

Comments

Bjorn Andersson Aug. 22, 2019, 2:50 p.m. UTC | #1
On Thu 22 Aug 07:37 PDT 2019, Brian Masney wrote:

> From: Rob Clark <robdclark@gmail.com>
> 
> Add support to restore the secure configuration for qcm_scm-32.c. This
> is needed by the On Chip MEMory (OCMEM) that is present on some
> Snapdragon devices.
> 
> Signed-off-by: Rob Clark <robdclark@gmail.com>
> [masneyb@onstation.org: ported to latest kernel; set ctx_bank_num to
>  spare parameter.]
> Signed-off-by: Brian Masney <masneyb@onstation.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

> ---
> Changes since v5:
> - None
> 
> Changes since v4:
> - None
> 
> Changes since v3:
> - None
> 
> Changes since v2:
> - None
> 
> Changes since v1:
> - Use existing __qcom_scm_restore_sec_cfg() function stub in
>   qcom_scm-32.c that was unimplemented
> - Set the cfg.ctx_bank_num to the spare function parameter. It was
>   previously set to the device_id.
> 
>  drivers/firmware/qcom_scm-32.c | 17 ++++++++++++++++-
>  drivers/firmware/qcom_scm.c    | 13 +++++++++++++
>  include/linux/qcom_scm.h       | 11 +++++++++++
>  3 files changed, 40 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/firmware/qcom_scm-32.c b/drivers/firmware/qcom_scm-32.c
> index 4c2514e5e249..5d90b7f5ab5a 100644
> --- a/drivers/firmware/qcom_scm-32.c
> +++ b/drivers/firmware/qcom_scm-32.c
> @@ -617,7 +617,22 @@ int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region,
>  int __qcom_scm_restore_sec_cfg(struct device *dev, u32 device_id,
>  			       u32 spare)
>  {
> -	return -ENODEV;
> +	struct msm_scm_sec_cfg {
> +		__le32 id;
> +		__le32 ctx_bank_num;
> +	} cfg;
> +	int ret, scm_ret = 0;
> +
> +	cfg.id = cpu_to_le32(device_id);
> +	cfg.ctx_bank_num = cpu_to_le32(spare);
> +
> +	ret = qcom_scm_call(dev, QCOM_SCM_SVC_MP, QCOM_SCM_RESTORE_SEC_CFG,
> +			    &cfg, sizeof(cfg), &scm_ret, sizeof(scm_ret));
> +
> +	if (ret || scm_ret)
> +		return ret ? ret : -EINVAL;
> +
> +	return 0;
>  }
>  
>  int __qcom_scm_iommu_secure_ptbl_size(struct device *dev, u32 spare,
> diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
> index 7e285ff3961d..27c1d98a34e6 100644
> --- a/drivers/firmware/qcom_scm.c
> +++ b/drivers/firmware/qcom_scm.c
> @@ -367,6 +367,19 @@ static const struct reset_control_ops qcom_scm_pas_reset_ops = {
>  	.deassert = qcom_scm_pas_reset_deassert,
>  };
>  
> +/**
> + * qcom_scm_restore_sec_cfg_available() - Check if secure environment
> + * supports restore security config interface.
> + *
> + * Return true if restore-cfg interface is supported, false if not.
> + */
> +bool qcom_scm_restore_sec_cfg_available(void)
> +{
> +	return __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_MP,
> +					    QCOM_SCM_RESTORE_SEC_CFG);
> +}
> +EXPORT_SYMBOL(qcom_scm_restore_sec_cfg_available);
> +
>  int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare)
>  {
>  	return __qcom_scm_restore_sec_cfg(__scm->dev, device_id, spare);
> diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h
> index b49b734d662c..04382e1798e4 100644
> --- a/include/linux/qcom_scm.h
> +++ b/include/linux/qcom_scm.h
> @@ -34,6 +34,16 @@ enum qcom_scm_ocmem_client {
>  	QCOM_SCM_OCMEM_DEBUG_ID,
>  };
>  
> +enum qcom_scm_sec_dev_id {
> +	QCOM_SCM_MDSS_DEV_ID    = 1,
> +	QCOM_SCM_OCMEM_DEV_ID   = 5,
> +	QCOM_SCM_PCIE0_DEV_ID   = 11,
> +	QCOM_SCM_PCIE1_DEV_ID   = 12,
> +	QCOM_SCM_GFX_DEV_ID     = 18,
> +	QCOM_SCM_UFS_DEV_ID     = 19,
> +	QCOM_SCM_ICE_DEV_ID     = 20,
> +};
> +
>  #define QCOM_SCM_VMID_HLOS       0x3
>  #define QCOM_SCM_VMID_MSS_MSA    0xF
>  #define QCOM_SCM_VMID_WLAN       0x18
> @@ -70,6 +80,7 @@ extern int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
>  extern void qcom_scm_cpu_power_down(u32 flags);
>  extern u32 qcom_scm_get_version(void);
>  extern int qcom_scm_set_remote_state(u32 state, u32 id);
> +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);
> -- 
> 2.21.0
>
diff mbox series

Patch

diff --git a/drivers/firmware/qcom_scm-32.c b/drivers/firmware/qcom_scm-32.c
index 4c2514e5e249..5d90b7f5ab5a 100644
--- a/drivers/firmware/qcom_scm-32.c
+++ b/drivers/firmware/qcom_scm-32.c
@@ -617,7 +617,22 @@  int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region,
 int __qcom_scm_restore_sec_cfg(struct device *dev, u32 device_id,
 			       u32 spare)
 {
-	return -ENODEV;
+	struct msm_scm_sec_cfg {
+		__le32 id;
+		__le32 ctx_bank_num;
+	} cfg;
+	int ret, scm_ret = 0;
+
+	cfg.id = cpu_to_le32(device_id);
+	cfg.ctx_bank_num = cpu_to_le32(spare);
+
+	ret = qcom_scm_call(dev, QCOM_SCM_SVC_MP, QCOM_SCM_RESTORE_SEC_CFG,
+			    &cfg, sizeof(cfg), &scm_ret, sizeof(scm_ret));
+
+	if (ret || scm_ret)
+		return ret ? ret : -EINVAL;
+
+	return 0;
 }
 
 int __qcom_scm_iommu_secure_ptbl_size(struct device *dev, u32 spare,
diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
index 7e285ff3961d..27c1d98a34e6 100644
--- a/drivers/firmware/qcom_scm.c
+++ b/drivers/firmware/qcom_scm.c
@@ -367,6 +367,19 @@  static const struct reset_control_ops qcom_scm_pas_reset_ops = {
 	.deassert = qcom_scm_pas_reset_deassert,
 };
 
+/**
+ * qcom_scm_restore_sec_cfg_available() - Check if secure environment
+ * supports restore security config interface.
+ *
+ * Return true if restore-cfg interface is supported, false if not.
+ */
+bool qcom_scm_restore_sec_cfg_available(void)
+{
+	return __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_MP,
+					    QCOM_SCM_RESTORE_SEC_CFG);
+}
+EXPORT_SYMBOL(qcom_scm_restore_sec_cfg_available);
+
 int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare)
 {
 	return __qcom_scm_restore_sec_cfg(__scm->dev, device_id, spare);
diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h
index b49b734d662c..04382e1798e4 100644
--- a/include/linux/qcom_scm.h
+++ b/include/linux/qcom_scm.h
@@ -34,6 +34,16 @@  enum qcom_scm_ocmem_client {
 	QCOM_SCM_OCMEM_DEBUG_ID,
 };
 
+enum qcom_scm_sec_dev_id {
+	QCOM_SCM_MDSS_DEV_ID    = 1,
+	QCOM_SCM_OCMEM_DEV_ID   = 5,
+	QCOM_SCM_PCIE0_DEV_ID   = 11,
+	QCOM_SCM_PCIE1_DEV_ID   = 12,
+	QCOM_SCM_GFX_DEV_ID     = 18,
+	QCOM_SCM_UFS_DEV_ID     = 19,
+	QCOM_SCM_ICE_DEV_ID     = 20,
+};
+
 #define QCOM_SCM_VMID_HLOS       0x3
 #define QCOM_SCM_VMID_MSS_MSA    0xF
 #define QCOM_SCM_VMID_WLAN       0x18
@@ -70,6 +80,7 @@  extern int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
 extern void qcom_scm_cpu_power_down(u32 flags);
 extern u32 qcom_scm_get_version(void);
 extern int qcom_scm_set_remote_state(u32 state, u32 id);
+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);