diff mbox series

[07/10] soc: fujitsu: hwb: Add IOC_GET_PE_INFO ioctl

Message ID 20210108105241.1757799-8-misono.tomohiro@jp.fujitsu.com (mailing list archive)
State Changes Requested
Headers show
Series Add Fujitsu A64FX soc entry/hardware barrier driver | expand

Commit Message

Misono Tomohiro Jan. 8, 2021, 10:52 a.m. UTC 
This is an infomative ioctl to tell users CMG/PE number of currently
running PE.

Signed-off-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
---
 drivers/soc/fujitsu/fujitsu_hwb.c      | 18 ++++++++++++++++++
 include/uapi/linux/fujitsu_hpc_ioctl.h |  7 +++++++
 2 files changed, 25 insertions(+)
diff mbox series

Patch

diff --git a/drivers/soc/fujitsu/fujitsu_hwb.c b/drivers/soc/fujitsu/fujitsu_hwb.c
index 2535942cc0d7..1132cb74b13b 100644
--- a/drivers/soc/fujitsu/fujitsu_hwb.c
+++ b/drivers/soc/fujitsu/fujitsu_hwb.c
@@ -733,6 +733,21 @@  static int ioc_bb_free(struct file *filp,  void __user *argp)
 	return 0;
 }
 
+static int ioc_get_pe_info(struct file *filp, void __user *argp)
+{
+	struct fujitsu_hwb_ioc_pe_info pe_info = {0};
+	int cpu = smp_processor_id();
+
+	pe_info.cmg = _hwinfo.core_map[cpu].cmg;
+	pe_info.ppe = _hwinfo.core_map[cpu].ppe;
+
+	if (copy_to_user((struct fujitsu_hwb_ioc_pe_info __user *)argp, &pe_info,
+						sizeof(struct fujitsu_hwb_ioc_pe_info)))
+		return -EFAULT;
+
+	return 0;
+}
+
 static long fujitsu_hwb_dev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
 	void __user *argp = (void __user *)arg;
@@ -751,6 +766,9 @@  static long fujitsu_hwb_dev_ioctl(struct file *filp, unsigned int cmd, unsigned
 	case FUJITSU_HWB_IOC_BB_FREE:
 		ret = ioc_bb_free(filp, argp);
 		break;
+	case FUJITSU_HWB_IOC_GET_PE_INFO:
+		ret = ioc_get_pe_info(filp, argp);
+		break;
 	default:
 		ret = -ENOTTY;
 		break;
diff --git a/include/uapi/linux/fujitsu_hpc_ioctl.h b/include/uapi/linux/fujitsu_hpc_ioctl.h
index 7a285d8db0a9..1226014d97c4 100644
--- a/include/uapi/linux/fujitsu_hpc_ioctl.h
+++ b/include/uapi/linux/fujitsu_hpc_ioctl.h
@@ -22,6 +22,11 @@  struct fujitsu_hwb_ioc_bw_ctl {
 	__s8 window;
 };
 
+struct fujitsu_hwb_ioc_pe_info {
+	__u8 cmg;
+	__u8 ppe;
+};
+
 #define FUJITSU_HWB_IOC_BB_ALLOC _IOWR(__FUJITSU_IOCTL_MAGIC, \
 	0x00, struct fujitsu_hwb_ioc_bb_ctl)
 #define FUJITSU_HWB_IOC_BW_ASSIGN _IOWR(__FUJITSU_IOCTL_MAGIC, \
@@ -30,5 +35,7 @@  struct fujitsu_hwb_ioc_bw_ctl {
 	0x02, struct fujitsu_hwb_ioc_bw_ctl)
 #define FUJITSU_HWB_IOC_BB_FREE _IOW(__FUJITSU_IOCTL_MAGIC, \
 	0x03, struct fujitsu_hwb_ioc_bb_ctl)
+#define FUJITSU_HWB_IOC_GET_PE_INFO _IOR(__FUJITSU_IOCTL_MAGIC, \
+	0x04, struct fujitsu_hwb_ioc_pe_info)
 
 #endif /* _UAPI_LINUX_FUJITSU_HPC_IOC_H */