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Commit 92add22e authored by Frederic Barrat's avatar Frederic Barrat Committed by Michael Ellerman
Browse files

ocxl: Add trace points 



Define a few trace points so that we can use the standard tracing
mechanism for debug and/or monitoring.

Signed-off-by: default avatarFrederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 280b983c

drivers/misc/ocxl/afu_irq.c

+5 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 
#include <linux/eventfd.h>

#include <asm/pnv-ocxl.h>

#include "ocxl_internal.h"

#include "trace.h"



struct afu_irq {

	int id;
@@ -28,6 +29,7 @@ static irqreturn_t afu_irq_handler(int virq, void *data) 
{

	struct afu_irq *irq = (struct afu_irq *) data;



	trace_ocxl_afu_irq_receive(virq);

	if (irq->ev_ctx)

		eventfd_signal(irq->ev_ctx, 1);

	return IRQ_HANDLED;
@@ -102,6 +104,8 @@ int ocxl_afu_irq_alloc(struct ocxl_context *ctx, u64 *irq_offset) 


	*irq_offset = irq_id_to_offset(ctx, irq->id);



	trace_ocxl_afu_irq_alloc(ctx->pasid, irq->id, irq->virq, irq->hw_irq,

				*irq_offset);

	mutex_unlock(&ctx->irq_lock);

	return 0;
@@ -117,6 +121,7 @@ int ocxl_afu_irq_alloc(struct ocxl_context *ctx, u64 *irq_offset) 


static void afu_irq_free(struct afu_irq *irq, struct ocxl_context *ctx)

{

	trace_ocxl_afu_irq_free(ctx->pasid, irq->id);

	if (ctx->mapping)

		unmap_mapping_range(ctx->mapping,

				irq_id_to_offset(ctx, irq->id),

drivers/misc/ocxl/context.c

+2 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0+

// Copyright 2017 IBM Corp.

#include <linux/sched/mm.h>

#include "trace.h"

#include "ocxl_internal.h"



struct ocxl_context *ocxl_context_alloc(void)
@@ -214,6 +215,7 @@ int ocxl_context_detach(struct ocxl_context *ctx) 
	mutex_lock(&ctx->afu->afu_control_lock);

	rc = ocxl_config_terminate_pasid(dev, afu_control_pos, ctx->pasid);

	mutex_unlock(&ctx->afu->afu_control_lock);

	trace_ocxl_terminate_pasid(ctx->pasid, rc);

	if (rc) {

		/*

		 * If we timeout waiting for the AFU to terminate the

drivers/misc/ocxl/link.c

+10 −1
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ 
#include <asm/pnv-ocxl.h>

#include <misc/ocxl.h>

#include "ocxl_internal.h"

#include "trace.h"





#define SPA_PASID_BITS		15
@@ -116,9 +117,12 @@ static void ack_irq(struct spa *spa, enum xsl_response r) 
	else

		WARN(1, "Invalid irq response %d\n", r);



	if (reg)

	if (reg) {

		trace_ocxl_fault_ack(spa->spa_mem, spa->xsl_fault.pe,

				spa->xsl_fault.dsisr, spa->xsl_fault.dar, reg);

		out_be64(spa->reg_tfc, reg);

	}

}



static void xsl_fault_handler_bh(struct work_struct *fault_work)

{
@@ -182,6 +186,7 @@ static irqreturn_t xsl_fault_handler(int irq, void *data) 
	int lpid, pid, tid;



	read_irq(spa, &dsisr, &dar, &pe_handle);

	trace_ocxl_fault(spa->spa_mem, pe_handle, dsisr, dar, -1);



	WARN_ON(pe_handle > SPA_PE_MASK);

	pe = spa->spa_mem + pe_handle;
@@ -532,6 +537,7 @@ int ocxl_link_add_pe(void *link_handle, int pasid, u32 pidr, u32 tidr, 
	 * the problem.

	 */

	mmgrab(mm);

	trace_ocxl_context_add(current->pid, spa->spa_mem, pasid, pidr, tidr);

unlock:

	mutex_unlock(&spa->spa_lock);

	return rc;
@@ -577,6 +583,9 @@ int ocxl_link_remove_pe(void *link_handle, int pasid) 
		goto unlock;

	}



	trace_ocxl_context_remove(current->pid, spa->spa_mem, pasid,

				be32_to_cpu(pe->pid), be32_to_cpu(pe->tid));



	memset(pe, 0, sizeof(struct ocxl_process_element));

	/*

	 * The barrier makes sure the PE is removed from the SPA

drivers/misc/ocxl/trace.c

0 → 100644
+6 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0+

// Copyright 2017 IBM Corp.

#ifndef __CHECKER__

#define CREATE_TRACE_POINTS

#include "trace.h"

#endif

drivers/misc/ocxl/trace.h

0 → 100644
+182 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0+

// Copyright 2017 IBM Corp.

#undef TRACE_SYSTEM

#define TRACE_SYSTEM ocxl



#if !defined(_TRACE_OCXL_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_OCXL_H



#include <linux/tracepoint.h>



DECLARE_EVENT_CLASS(ocxl_context,

	TP_PROTO(pid_t pid, void *spa, int pasid, u32 pidr, u32 tidr),

	TP_ARGS(pid, spa, pasid, pidr, tidr),



	TP_STRUCT__entry(

		__field(pid_t, pid)

		__field(void*, spa)

		__field(int, pasid)

		__field(u32, pidr)

		__field(u32, tidr)

	),



	TP_fast_assign(

		__entry->pid = pid;

		__entry->spa = spa;

		__entry->pasid = pasid;

		__entry->pidr = pidr;

		__entry->tidr = tidr;

	),



	TP_printk("linux pid=%d spa=0x%p pasid=0x%x pidr=0x%x tidr=0x%x",

		__entry->pid,

		__entry->spa,

		__entry->pasid,

		__entry->pidr,

		__entry->tidr

	)

);



DEFINE_EVENT(ocxl_context, ocxl_context_add,

	TP_PROTO(pid_t pid, void *spa, int pasid, u32 pidr, u32 tidr),

	TP_ARGS(pid, spa, pasid, pidr, tidr)

);



DEFINE_EVENT(ocxl_context, ocxl_context_remove,

	TP_PROTO(pid_t pid, void *spa, int pasid, u32 pidr, u32 tidr),

	TP_ARGS(pid, spa, pasid, pidr, tidr)

);



TRACE_EVENT(ocxl_terminate_pasid,

	TP_PROTO(int pasid, int rc),

	TP_ARGS(pasid, rc),



	TP_STRUCT__entry(

		__field(int, pasid)

		__field(int, rc)

	),



	TP_fast_assign(

		__entry->pasid = pasid;

		__entry->rc = rc;

	),



	TP_printk("pasid=0x%x rc=%d",

		__entry->pasid,

		__entry->rc

	)

);



DECLARE_EVENT_CLASS(ocxl_fault_handler,

	TP_PROTO(void *spa, u64 pe, u64 dsisr, u64 dar, u64 tfc),

	TP_ARGS(spa, pe, dsisr, dar, tfc),



	TP_STRUCT__entry(

		__field(void *, spa)

		__field(u64, pe)

		__field(u64, dsisr)

		__field(u64, dar)

		__field(u64, tfc)

	),



	TP_fast_assign(

		__entry->spa = spa;

		__entry->pe = pe;

		__entry->dsisr = dsisr;

		__entry->dar = dar;

		__entry->tfc = tfc;

	),



	TP_printk("spa=%p pe=0x%llx dsisr=0x%llx dar=0x%llx tfc=0x%llx",

		__entry->spa,

		__entry->pe,

		__entry->dsisr,

		__entry->dar,

		__entry->tfc

	)

);



DEFINE_EVENT(ocxl_fault_handler, ocxl_fault,

	TP_PROTO(void *spa, u64 pe, u64 dsisr, u64 dar, u64 tfc),

	TP_ARGS(spa, pe, dsisr, dar, tfc)

);



DEFINE_EVENT(ocxl_fault_handler, ocxl_fault_ack,

	TP_PROTO(void *spa, u64 pe, u64 dsisr, u64 dar, u64 tfc),

	TP_ARGS(spa, pe, dsisr, dar, tfc)

);



TRACE_EVENT(ocxl_afu_irq_alloc,

	TP_PROTO(int pasid, int irq_id, unsigned int virq, int hw_irq,

		u64 irq_offset),

	TP_ARGS(pasid, irq_id, virq, hw_irq, irq_offset),



	TP_STRUCT__entry(

		__field(int, pasid)

		__field(int, irq_id)

		__field(unsigned int, virq)

		__field(int, hw_irq)

		__field(u64, irq_offset)

	),



	TP_fast_assign(

		__entry->pasid = pasid;

		__entry->irq_id = irq_id;

		__entry->virq = virq;

		__entry->hw_irq = hw_irq;

		__entry->irq_offset = irq_offset;

	),



	TP_printk("pasid=0x%x irq_id=%d virq=%u hw_irq=%d irq_offset=0x%llx",

		__entry->pasid,

		__entry->irq_id,

		__entry->virq,

		__entry->hw_irq,

		__entry->irq_offset

	)

);



TRACE_EVENT(ocxl_afu_irq_free,

	TP_PROTO(int pasid, int irq_id),

	TP_ARGS(pasid, irq_id),



	TP_STRUCT__entry(

		__field(int, pasid)

		__field(int, irq_id)

	),



	TP_fast_assign(

		__entry->pasid = pasid;

		__entry->irq_id = irq_id;

	),



	TP_printk("pasid=0x%x irq_id=%d",

		__entry->pasid,

		__entry->irq_id

	)

);



TRACE_EVENT(ocxl_afu_irq_receive,

	TP_PROTO(int virq),

	TP_ARGS(virq),



	TP_STRUCT__entry(

		__field(int, virq)

	),



	TP_fast_assign(

		__entry->virq = virq;

	),



	TP_printk("virq=%d",

		__entry->virq

	)

);



#endif /* _TRACE_OCXL_H */



/* This part must be outside protection */

#undef TRACE_INCLUDE_PATH

#define TRACE_INCLUDE_PATH .

#define TRACE_INCLUDE_FILE trace

#include <trace/define_trace.h>