Merge branch 'pci/controller/dwc-rockchip'

- Add tracepoints for PCIe controller LTSSM transitions and link rate
  changes (Shawn Lin)

- Trace LTSSM events collected by the dw-rockchip debug FIFO (Shawn Lin)

* pci/controller/dwc-rockchip:
  PCI: dw-rockchip: Add pcie_ltssm_state_transition tracepoint support
  Documentation: tracing: Add PCI controller event documentation
  PCI: trace: Add PCI controller tracepoint feature

1 files changed, 58 insertions, 0 deletions

diff --git a/include/trace/events/pci_controller.h b/include/trace/events/pci_controller.h
new file mode 100644
index 000000000000..a4b387cf52a6
--- /dev/null
+++ b/include/trace/events/pci_controller.h
@@ -0,0 +1,58 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM pci_controller
+
+#if !defined(_TRACE_HW_EVENT_PCI_CONTROLLER_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_HW_EVENT_PCI_CONTROLLER_H
+
+#include <uapi/linux/pci_regs.h>
+#include <linux/tracepoint.h>
+
+#define RATE					\
+	EM(PCIE_SPEED_2_5GT,  "2.5 GT/s")	\
+	EM(PCIE_SPEED_5_0GT,  "5.0 GT/s")	\
+	EM(PCIE_SPEED_8_0GT,  "8.0 GT/s")	\
+	EM(PCIE_SPEED_16_0GT, "16.0 GT/s")	\
+	EM(PCIE_SPEED_32_0GT, "32.0 GT/s")	\
+	EM(PCIE_SPEED_64_0GT, "64.0 GT/s")	\
+	EMe(PCI_SPEED_UNKNOWN, "Unknown")
+
+
+#undef EM
+#undef EMe
+#define EM(a, b)	TRACE_DEFINE_ENUM(a);
+#define EMe(a, b)	TRACE_DEFINE_ENUM(a);
+
+RATE
+
+#undef EM
+#undef EMe
+#define EM(a, b)	{a, b},
+#define EMe(a, b)	{a, b}
+
+TRACE_EVENT(pcie_ltssm_state_transition,
+	TP_PROTO(const char *dev_name, const char *state, u32 rate),
+	TP_ARGS(dev_name, state, rate),
+
+	TP_STRUCT__entry(
+		__string(dev_name, dev_name)
+		__string(state, state)
+		__field(u32, rate)
+	),
+
+	TP_fast_assign(
+		__assign_str(dev_name);
+		__assign_str(state);
+		__entry->rate = rate;
+	),
+
+	TP_printk("dev: %s state: %s rate: %s",
+		__get_str(dev_name), __get_str(state),
+		__print_symbolic(__entry->rate, RATE)
+	)
+);
+
+#endif /* _TRACE_HW_EVENT_PCI_CONTROLLER_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>