Commit 4817754a authored by Mathias Nyman's avatar Mathias Nyman Committed by Greg Kroah-Hartman
Browse files

xhci: add stream context tracing 



Show stream id, stream context type (SCT), ring dequeue pointer and
the DMA address of the stream context during stream allocation

Signed-off-by: default avatarMathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20241106101459.775897-8-mathias.nyman@linux.intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 4a587aa5

drivers/usb/host/xhci-mem.c

+2 −0
Original line number Diff line number Diff line
@@ -658,6 +658,8 @@ struct xhci_stream_info *xhci_alloc_stream_info(struct xhci_hcd *xhci, 
		xhci_dbg(xhci, "Setting stream %d ring ptr to 0x%08llx\n", cur_stream, addr);



		ret = xhci_update_stream_mapping(cur_ring, mem_flags);



		trace_xhci_alloc_stream_info_ctx(stream_info, cur_stream);

		if (ret) {

			xhci_ring_free(xhci, cur_ring);

			stream_info->stream_rings[cur_stream] = NULL;

drivers/usb/host/xhci-trace.h

+26 −0
Original line number Diff line number Diff line
@@ -314,6 +314,32 @@ DEFINE_EVENT(xhci_log_urb, xhci_urb_dequeue, 
	TP_ARGS(urb)

);



DECLARE_EVENT_CLASS(xhci_log_stream_ctx,

	TP_PROTO(struct xhci_stream_info *info, unsigned int stream_id),

	TP_ARGS(info, stream_id),

	TP_STRUCT__entry(

		__field(unsigned int, stream_id)

		__field(u64, stream_ring)

		__field(dma_addr_t, ctx_array_dma)



	),

	TP_fast_assign(

		__entry->stream_id = stream_id;

		__entry->stream_ring = le64_to_cpu(info->stream_ctx_array[stream_id].stream_ring);

		__entry->ctx_array_dma = info->ctx_array_dma + stream_id * 16;



	),

	TP_printk("stream %u ctx @%pad: SCT %llu deq %llx", __entry->stream_id,

		&__entry->ctx_array_dma, CTX_TO_SCT(__entry->stream_ring),

		__entry->stream_ring

	)

);



DEFINE_EVENT(xhci_log_stream_ctx, xhci_alloc_stream_info_ctx,

	TP_PROTO(struct xhci_stream_info *info, unsigned int stream_id),

	TP_ARGS(info, stream_id)

);



DECLARE_EVENT_CLASS(xhci_log_ep_ctx,

	TP_PROTO(struct xhci_ep_ctx *ctx),

	TP_ARGS(ctx),

drivers/usb/host/xhci.h

+1 −0
Original line number Diff line number Diff line
@@ -554,6 +554,7 @@ struct xhci_stream_ctx { 


/* Stream Context Types (section 6.4.1) - bits 3:1 of stream ctx deq ptr */

#define	SCT_FOR_CTX(p)		(((p) & 0x7) << 1)

#define	CTX_TO_SCT(p)		(((p) >> 1) & 0x7)

/* Secondary stream array type, dequeue pointer is to a transfer ring */

#define	SCT_SEC_TR		0

/* Primary stream array type, dequeue pointer is to a transfer ring */