[PATCH v4 01/24] drm/amdkfd/kfd_ioctl: add pc sampling support

[James Zhu]

From: David Yat Sin <david.yatsin at amd.com>

Add pc sampling support in kfd_ioctl.

The user mode code which uses this new kfd_ioctl is linked to
https://github.com/RadeonOpenCompute/ROCT-Thunk-Interface
with master branch.

Co-developed-by: James Zhu <James.Zhu at amd.com>
Signed-off-by: James Zhu <James.Zhu at amd.com>
Signed-off-by: David Yat Sin <david.yatsin at amd.com>
---
 include/uapi/linux/kfd_ioctl.h | 61 +++++++++++++++++++++++++++++++++-
 1 file changed, 60 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h
index 9ce46edc62a5..ec1b6404b185 100644
--- a/include/uapi/linux/kfd_ioctl.h
+++ b/include/uapi/linux/kfd_ioctl.h
@@ -1447,6 +1447,62 @@ struct kfd_ioctl_dbg_trap_args {
 	};
 };
 
+/**
+ * kfd_ioctl_pc_sample_op - PC Sampling ioctl operations
+ *
+ * @KFD_IOCTL_PCS_OP_QUERY_CAPABILITIES: Query device PC Sampling capabilities
+ * @KFD_IOCTL_PCS_OP_CREATE:             Register this process with a per-device PC sampler instance
+ * @KFD_IOCTL_PCS_OP_DESTROY:            Unregister from a previously registered PC sampler instance
+ * @KFD_IOCTL_PCS_OP_START:              Process begins taking samples from a previously registered PC sampler instance
+ * @KFD_IOCTL_PCS_OP_STOP:               Process stops taking samples from a previously registered PC sampler instance
+ */
+enum kfd_ioctl_pc_sample_op {
+	KFD_IOCTL_PCS_OP_QUERY_CAPABILITIES,
+	KFD_IOCTL_PCS_OP_CREATE,
+	KFD_IOCTL_PCS_OP_DESTROY,
+	KFD_IOCTL_PCS_OP_START,
+	KFD_IOCTL_PCS_OP_STOP,
+};
+
+/* Values have to be a power of 2*/
+#define KFD_IOCTL_PCS_FLAG_POWER_OF_2 0x00000001
+
+enum kfd_ioctl_pc_sample_method {
+	KFD_IOCTL_PCS_METHOD_HOSTTRAP = 1,
+	KFD_IOCTL_PCS_METHOD_STOCHASTIC,
+};
+
+enum kfd_ioctl_pc_sample_type {
+	KFD_IOCTL_PCS_TYPE_TIME_US,
+	KFD_IOCTL_PCS_TYPE_CLOCK_CYCLES,
+	KFD_IOCTL_PCS_TYPE_INSTRUCTIONS
+};
+
+struct kfd_pc_sample_info {
+	__u64 interval;      /* [IN] if PCS_TYPE_INTERVAL_US: sample interval in us
+	                      * if PCS_TYPE_CLOCK_CYCLES: sample interval in graphics core clk cycles
+	                      * if PCS_TYPE_INSTRUCTIONS: sample interval in instructions issued by
+	                      * graphics compute units
+	                      */
+	__u64 interval_min;  /* [OUT] */
+	__u64 interval_max;  /* [OUT] */
+	__u64 flags;         /* [OUT] indicate potential restrictions e.g FLAG_POWER_OF_2 */
+	__u32 method;        /* [IN/OUT] kfd_ioctl_pc_sample_method */
+	__u32 type;          /* [IN/OUT] kfd_ioctl_pc_sample_type */
+};
+
+#define KFD_IOCTL_PCS_QUERY_TYPE_FULL (1 << 0) /* If not set, return current */
+
+struct kfd_ioctl_pc_sample_args {
+	__u64 sample_info_ptr;   /* array of kfd_pc_sample_info */
+	__u32 num_sample_info;
+	__u32 op;                /* kfd_ioctl_pc_sample_op */
+	__u32 gpu_id;
+	__u32 trace_id;
+	__u32 flags;             /* kfd_ioctl_pcs_query flags */
+	__u32 reserved;
+};
+
 #define AMDKFD_IOCTL_BASE 'K'
 #define AMDKFD_IO(nr)			_IO(AMDKFD_IOCTL_BASE, nr)
 #define AMDKFD_IOR(nr, type)		_IOR(AMDKFD_IOCTL_BASE, nr, type)
@@ -1567,7 +1623,10 @@ struct kfd_ioctl_dbg_trap_args {
 #define AMDKFD_IOC_DBG_TRAP			\
 		AMDKFD_IOWR(0x26, struct kfd_ioctl_dbg_trap_args)
 
+#define AMDKFD_IOC_PC_SAMPLE		\
+		AMDKFD_IOWR(0x27, struct kfd_ioctl_pc_sample_args)
+
 #define AMDKFD_COMMAND_START		0x01
-#define AMDKFD_COMMAND_END		0x27
+#define AMDKFD_COMMAND_END		0x28
 
 #endif
-- 
2.25.1