drivers/gpu/host1x/hw/debug_hw.c - arm/linux - Git at Google

 /*
  * Copyright (C) 2010 Google, Inc.
  * Author: Erik Gilling <konkers@android.com>
  *
  * Copyright (C) 2011-2013 NVIDIA Corporation
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
  * may be copied, distributed, and modified under those terms.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  */

 #include "../dev.h"
 #include "../debug.h"
 #include "../cdma.h"
 #include "../channel.h"

 #define HOST1X_DEBUG_MAX_PAGE_OFFSET 102400

 enum {
 	HOST1X_OPCODE_SETCLASS	= 0x00,
 	HOST1X_OPCODE_INCR	= 0x01,
 	HOST1X_OPCODE_NONINCR	= 0x02,
 	HOST1X_OPCODE_MASK	= 0x03,
 	HOST1X_OPCODE_IMM	= 0x04,
 	HOST1X_OPCODE_RESTART	= 0x05,
 	HOST1X_OPCODE_GATHER	= 0x06,
 	HOST1X_OPCODE_EXTEND	= 0x0e,
 };

 enum {
 	HOST1X_OPCODE_EXTEND_ACQUIRE_MLOCK	= 0x00,
 	HOST1X_OPCODE_EXTEND_RELEASE_MLOCK	= 0x01,
 };

 static unsigned int show_channel_command(struct output *o, u32 val)
 {
 	unsigned int mask, subop;

 	switch (val >> 28) {
 	case HOST1X_OPCODE_SETCLASS:
 		mask = val & 0x3f;
 		if (mask) {
 			host1x_debug_output(o, "SETCL(class=%03x, offset=%03x, mask=%02x, [",
 					    val >> 6 & 0x3ff,
 					    val >> 16 & 0xfff, mask);
 			return hweight8(mask);
 		}

 		host1x_debug_output(o, "SETCL(class=%03x)\n", val >> 6 & 0x3ff);
 		return 0;

 	case HOST1X_OPCODE_INCR:
 		host1x_debug_output(o, "INCR(offset=%03x, [",
 				    val >> 16 & 0xfff);
 		return val & 0xffff;

 	case HOST1X_OPCODE_NONINCR:
 		host1x_debug_output(o, "NONINCR(offset=%03x, [",
 				    val >> 16 & 0xfff);
 		return val & 0xffff;

 	case HOST1X_OPCODE_MASK:
 		mask = val & 0xffff;
 		host1x_debug_output(o, "MASK(offset=%03x, mask=%03x, [",
 				    val >> 16 & 0xfff, mask);
 		return hweight16(mask);

 	case HOST1X_OPCODE_IMM:
 		host1x_debug_output(o, "IMM(offset=%03x, data=%03x)\n",
 				    val >> 16 & 0xfff, val & 0xffff);
 		return 0;

 	case HOST1X_OPCODE_RESTART:
 		host1x_debug_output(o, "RESTART(offset=%08x)\n", val << 4);
 		return 0;

 	case HOST1X_OPCODE_GATHER:
 		host1x_debug_output(o, "GATHER(offset=%03x, insert=%d, type=%d, count=%04x, addr=[",
 				    val >> 16 & 0xfff, val >> 15 & 0x1,
 				    val >> 14 & 0x1, val & 0x3fff);
 		return 1;

 	case HOST1X_OPCODE_EXTEND:
 		subop = val >> 24 & 0xf;
 		if (subop == HOST1X_OPCODE_EXTEND_ACQUIRE_MLOCK)
 			host1x_debug_output(o, "ACQUIRE_MLOCK(index=%d)\n",
 					    val & 0xff);
 		else if (subop == HOST1X_OPCODE_EXTEND_RELEASE_MLOCK)
 			host1x_debug_output(o, "RELEASE_MLOCK(index=%d)\n",
 					    val & 0xff);
 		else
 			host1x_debug_output(o, "EXTEND_UNKNOWN(%08x)\n", val);
 		return 0;

 	default:
 		return 0;
 	}
 }

 static void show_gather(struct output *o, phys_addr_t phys_addr,
 			unsigned int words, struct host1x_cdma *cdma,
 			phys_addr_t pin_addr, u32 *map_addr)
 {
 	/* Map dmaget cursor to corresponding mem handle */
 	u32 offset = phys_addr - pin_addr;
 	unsigned int data_count = 0, i;

 	/*
 	 * Sometimes we're given different hardware address to the same
 	 * page - in these cases the offset will get an invalid number and
 	 * we just have to bail out.
 	 */
 	if (offset > HOST1X_DEBUG_MAX_PAGE_OFFSET) {
 		host1x_debug_output(o, "[address mismatch]\n");
 		return;
 	}

 	for (i = 0; i < words; i++) {
 		u32 addr = phys_addr + i * 4;
 		u32 val = *(map_addr + offset / 4 + i);

 		if (!data_count) {
 			host1x_debug_output(o, "%08x: %08x:", addr, val);
 			data_count = show_channel_command(o, val);
 		} else {
 			host1x_debug_output(o, "%08x%s", val,
 					    data_count > 0 ? ", " : "])\n");
 			data_count--;
 		}
 	}
 }

 static void show_channel_gathers(struct output *o, struct host1x_cdma *cdma)
 {
 	struct host1x_job *job;

 	list_for_each_entry(job, &cdma->sync_queue, list) {
 		unsigned int i;

 		host1x_debug_output(o, "\n%p: JOB, syncpt_id=%d, syncpt_val=%d, first_get=%08x, timeout=%d num_slots=%d, num_handles=%d\n",
 				    job, job->syncpt_id, job->syncpt_end,
 				    job->first_get, job->timeout,
 				    job->num_slots, job->num_unpins);

 		for (i = 0; i < job->num_gathers; i++) {
 			struct host1x_job_gather *g = &job->gathers[i];
 			u32 *mapped;

 			if (job->gather_copy_mapped)
 				mapped = (u32 *)job->gather_copy_mapped;
 			else
 				mapped = host1x_bo_mmap(g->bo);

 			if (!mapped) {
 				host1x_debug_output(o, "[could not mmap]\n");
 				continue;
 			}

 			host1x_debug_output(o, "    GATHER at %pad+%#x, %d words\n",
 					    &g->base, g->offset, g->words);

 			show_gather(o, g->base + g->offset, g->words, cdma,
 				    g->base, mapped);

 			if (!job->gather_copy_mapped)
 				host1x_bo_munmap(g->bo, mapped);
 		}
 	}
 }

 static void host1x_debug_show_channel_cdma(struct host1x *host,
 					   struct host1x_channel *ch,
 					   struct output *o)
 {
 	struct host1x_cdma *cdma = &ch->cdma;
 	u32 dmaput, dmaget, dmactrl;
 	u32 cbstat, cbread;
 	u32 val, base, baseval;

 	dmaput = host1x_ch_readl(ch, HOST1X_CHANNEL_DMAPUT);
 	dmaget = host1x_ch_readl(ch, HOST1X_CHANNEL_DMAGET);
 	dmactrl = host1x_ch_readl(ch, HOST1X_CHANNEL_DMACTRL);
 	cbread = host1x_sync_readl(host, HOST1X_SYNC_CBREAD(ch->id));
 	cbstat = host1x_sync_readl(host, HOST1X_SYNC_CBSTAT(ch->id));

 	host1x_debug_output(o, "%u-%s: ", ch->id, dev_name(ch->dev));

 	if (HOST1X_CHANNEL_DMACTRL_DMASTOP_V(dmactrl) ||
 	    !ch->cdma.push_buffer.mapped) {
 		host1x_debug_output(o, "inactive\n\n");
 		return;
 	}

 	if (HOST1X_SYNC_CBSTAT_CBCLASS_V(cbstat) == HOST1X_CLASS_HOST1X &&
 	    HOST1X_SYNC_CBSTAT_CBOFFSET_V(cbstat) ==
 			HOST1X_UCLASS_WAIT_SYNCPT)
 		host1x_debug_output(o, "waiting on syncpt %d val %d\n",
 				    cbread >> 24, cbread & 0xffffff);
 	else if (HOST1X_SYNC_CBSTAT_CBCLASS_V(cbstat) ==
 				HOST1X_CLASS_HOST1X &&
 		 HOST1X_SYNC_CBSTAT_CBOFFSET_V(cbstat) ==
 				HOST1X_UCLASS_WAIT_SYNCPT_BASE) {
 		base = (cbread >> 16) & 0xff;
 		baseval =
 			host1x_sync_readl(host, HOST1X_SYNC_SYNCPT_BASE(base));
 		val = cbread & 0xffff;
 		host1x_debug_output(o, "waiting on syncpt %d val %d (base %d = %d; offset = %d)\n",
 				    cbread >> 24, baseval + val, base,
 				    baseval, val);
 	} else
 		host1x_debug_output(o, "active class %02x, offset %04x, val %08x\n",
 				    HOST1X_SYNC_CBSTAT_CBCLASS_V(cbstat),
 				    HOST1X_SYNC_CBSTAT_CBOFFSET_V(cbstat),
 				    cbread);

 	host1x_debug_output(o, "DMAPUT %08x, DMAGET %08x, DMACTL %08x\n",
 			    dmaput, dmaget, dmactrl);
 	host1x_debug_output(o, "CBREAD %08x, CBSTAT %08x\n", cbread, cbstat);

 	show_channel_gathers(o, cdma);
 	host1x_debug_output(o, "\n");
 }

 static void host1x_debug_show_channel_fifo(struct host1x *host,
 					   struct host1x_channel *ch,
 					   struct output *o)
 {
 	u32 val, rd_ptr, wr_ptr, start, end;
 	unsigned int data_count = 0;

 	host1x_debug_output(o, "%u: fifo:\n", ch->id);

 	val = host1x_ch_readl(ch, HOST1X_CHANNEL_FIFOSTAT);
 	host1x_debug_output(o, "FIFOSTAT %08x\n", val);
 	if (HOST1X_CHANNEL_FIFOSTAT_CFEMPTY_V(val)) {
 		host1x_debug_output(o, "[empty]\n");
 		return;
 	}

 	host1x_sync_writel(host, 0x0, HOST1X_SYNC_CFPEEK_CTRL);
 	host1x_sync_writel(host, HOST1X_SYNC_CFPEEK_CTRL_ENA_F(1) |
 			   HOST1X_SYNC_CFPEEK_CTRL_CHANNR_F(ch->id),
 			   HOST1X_SYNC_CFPEEK_CTRL);

 	val = host1x_sync_readl(host, HOST1X_SYNC_CFPEEK_PTRS);
 	rd_ptr = HOST1X_SYNC_CFPEEK_PTRS_CF_RD_PTR_V(val);
 	wr_ptr = HOST1X_SYNC_CFPEEK_PTRS_CF_WR_PTR_V(val);

 	val = host1x_sync_readl(host, HOST1X_SYNC_CF_SETUP(ch->id));
 	start = HOST1X_SYNC_CF_SETUP_BASE_V(val);
 	end = HOST1X_SYNC_CF_SETUP_LIMIT_V(val);

 	do {
 		host1x_sync_writel(host, 0x0, HOST1X_SYNC_CFPEEK_CTRL);
 		host1x_sync_writel(host, HOST1X_SYNC_CFPEEK_CTRL_ENA_F(1) |
 				   HOST1X_SYNC_CFPEEK_CTRL_CHANNR_F(ch->id) |
 				   HOST1X_SYNC_CFPEEK_CTRL_ADDR_F(rd_ptr),
 				   HOST1X_SYNC_CFPEEK_CTRL);
 		val = host1x_sync_readl(host, HOST1X_SYNC_CFPEEK_READ);

 		if (!data_count) {
 			host1x_debug_output(o, "%08x:", val);
 			data_count = show_channel_command(o, val);
 		} else {
 			host1x_debug_output(o, "%08x%s", val,
 					    data_count > 0 ? ", " : "])\n");
 			data_count--;
 		}

 		if (rd_ptr == end)
 			rd_ptr = start;
 		else
 			rd_ptr++;
 	} while (rd_ptr != wr_ptr);

 	if (data_count)
 		host1x_debug_output(o, ", ...])\n");
 	host1x_debug_output(o, "\n");

 	host1x_sync_writel(host, 0x0, HOST1X_SYNC_CFPEEK_CTRL);
 }

 static void host1x_debug_show_mlocks(struct host1x *host, struct output *o)
 {
 	unsigned int i;

 	host1x_debug_output(o, "---- mlocks ----\n");

 	for (i = 0; i < host1x_syncpt_nb_mlocks(host); i++) {
 		u32 owner =
 			host1x_sync_readl(host, HOST1X_SYNC_MLOCK_OWNER(i));
 		if (HOST1X_SYNC_MLOCK_OWNER_CH_OWNS_V(owner))
 			host1x_debug_output(o, "%u: locked by channel %u\n",
 				i, HOST1X_SYNC_MLOCK_OWNER_CHID_V(owner));
 		else if (HOST1X_SYNC_MLOCK_OWNER_CPU_OWNS_V(owner))
 			host1x_debug_output(o, "%u: locked by cpu\n", i);
 		else
 			host1x_debug_output(o, "%u: unlocked\n", i);
 	}

 	host1x_debug_output(o, "\n");
 }

 static const struct host1x_debug_ops host1x_debug_ops = {
 	.show_channel_cdma = host1x_debug_show_channel_cdma,
 	.show_channel_fifo = host1x_debug_show_channel_fifo,
 	.show_mlocks = host1x_debug_show_mlocks,
 };
	/*
	* Copyright (C) 2010 Google, Inc.
	* Author: Erik Gilling <konkers@android.com>
	*
	* Copyright (C) 2011-2013 NVIDIA Corporation
	*
	* This software is licensed under the terms of the GNU General Public
	* License version 2, as published by the Free Software Foundation, and
	* may be copied, distributed, and modified under those terms.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	*/

	#include "../dev.h"
	#include "../debug.h"
	#include "../cdma.h"
	#include "../channel.h"

	#define HOST1X_DEBUG_MAX_PAGE_OFFSET 102400

	enum {
	HOST1X_OPCODE_SETCLASS = 0x00,
	HOST1X_OPCODE_INCR = 0x01,
	HOST1X_OPCODE_NONINCR = 0x02,
	HOST1X_OPCODE_MASK = 0x03,
	HOST1X_OPCODE_IMM = 0x04,
	HOST1X_OPCODE_RESTART = 0x05,
	HOST1X_OPCODE_GATHER = 0x06,
	HOST1X_OPCODE_EXTEND = 0x0e,
	};

	enum {
	HOST1X_OPCODE_EXTEND_ACQUIRE_MLOCK = 0x00,
	HOST1X_OPCODE_EXTEND_RELEASE_MLOCK = 0x01,
	};

	static unsigned int show_channel_command(struct output *o, u32 val)
	{
	unsigned int mask, subop;

	switch (val >> 28) {
	case HOST1X_OPCODE_SETCLASS:
	mask = val & 0x3f;
	if (mask) {
	host1x_debug_output(o, "SETCL(class=%03x, offset=%03x, mask=%02x, [",
	val >> 6 & 0x3ff,
	val >> 16 & 0xfff, mask);
	return hweight8(mask);
	}

	host1x_debug_output(o, "SETCL(class=%03x)\n", val >> 6 & 0x3ff);
	return 0;

	case HOST1X_OPCODE_INCR:
	host1x_debug_output(o, "INCR(offset=%03x, [",
	val >> 16 & 0xfff);
	return val & 0xffff;

	case HOST1X_OPCODE_NONINCR:
	host1x_debug_output(o, "NONINCR(offset=%03x, [",
	val >> 16 & 0xfff);
	return val & 0xffff;

	case HOST1X_OPCODE_MASK:
	mask = val & 0xffff;
	host1x_debug_output(o, "MASK(offset=%03x, mask=%03x, [",
	val >> 16 & 0xfff, mask);
	return hweight16(mask);

	case HOST1X_OPCODE_IMM:
	host1x_debug_output(o, "IMM(offset=%03x, data=%03x)\n",
	val >> 16 & 0xfff, val & 0xffff);
	return 0;

	case HOST1X_OPCODE_RESTART:
	host1x_debug_output(o, "RESTART(offset=%08x)\n", val << 4);
	return 0;

	case HOST1X_OPCODE_GATHER:
	host1x_debug_output(o, "GATHER(offset=%03x, insert=%d, type=%d, count=%04x, addr=[",
	val >> 16 & 0xfff, val >> 15 & 0x1,
	val >> 14 & 0x1, val & 0x3fff);
	return 1;

	case HOST1X_OPCODE_EXTEND:
	subop = val >> 24 & 0xf;
	if (subop == HOST1X_OPCODE_EXTEND_ACQUIRE_MLOCK)
	host1x_debug_output(o, "ACQUIRE_MLOCK(index=%d)\n",
	val & 0xff);
	else if (subop == HOST1X_OPCODE_EXTEND_RELEASE_MLOCK)
	host1x_debug_output(o, "RELEASE_MLOCK(index=%d)\n",
	val & 0xff);
	else
	host1x_debug_output(o, "EXTEND_UNKNOWN(%08x)\n", val);
	return 0;

	default:
	return 0;
	}
	}

	static void show_gather(struct output *o, phys_addr_t phys_addr,
	unsigned int words, struct host1x_cdma *cdma,
	phys_addr_t pin_addr, u32 *map_addr)
	{
	/* Map dmaget cursor to corresponding mem handle */
	u32 offset = phys_addr - pin_addr;
	unsigned int data_count = 0, i;

	/*
	* Sometimes we're given different hardware address to the same
	* page - in these cases the offset will get an invalid number and
	* we just have to bail out.
	*/
	if (offset > HOST1X_DEBUG_MAX_PAGE_OFFSET) {
	host1x_debug_output(o, "[address mismatch]\n");
	return;
	}

	for (i = 0; i < words; i++) {
	u32 addr = phys_addr + i * 4;
	u32 val = *(map_addr + offset / 4 + i);

	if (!data_count) {
	host1x_debug_output(o, "%08x: %08x:", addr, val);
	data_count = show_channel_command(o, val);
	} else {
	host1x_debug_output(o, "%08x%s", val,
	data_count > 0 ? ", " : "])\n");
	data_count--;
	}
	}
	}

	static void show_channel_gathers(struct output o, struct host1x_cdma cdma)
	{
	struct host1x_job *job;

	list_for_each_entry(job, &cdma->sync_queue, list) {
	unsigned int i;

	host1x_debug_output(o, "\n%p: JOB, syncpt_id=%d, syncpt_val=%d, first_get=%08x, timeout=%d num_slots=%d, num_handles=%d\n",
	job, job->syncpt_id, job->syncpt_end,
	job->first_get, job->timeout,
	job->num_slots, job->num_unpins);

	for (i = 0; i < job->num_gathers; i++) {
	struct host1x_job_gather *g = &job->gathers[i];
	u32 *mapped;

	if (job->gather_copy_mapped)
	mapped = (u32 *)job->gather_copy_mapped;
	else
	mapped = host1x_bo_mmap(g->bo);

	if (!mapped) {
	host1x_debug_output(o, "[could not mmap]\n");
	continue;
	}

	host1x_debug_output(o, " GATHER at %pad+%#x, %d words\n",
	&g->base, g->offset, g->words);

	show_gather(o, g->base + g->offset, g->words, cdma,
	g->base, mapped);

	if (!job->gather_copy_mapped)
	host1x_bo_munmap(g->bo, mapped);
	}
	}
	}

	static void host1x_debug_show_channel_cdma(struct host1x *host,
	struct host1x_channel *ch,
	struct output *o)
	{
	struct host1x_cdma *cdma = &ch->cdma;
	u32 dmaput, dmaget, dmactrl;
	u32 cbstat, cbread;
	u32 val, base, baseval;

	dmaput = host1x_ch_readl(ch, HOST1X_CHANNEL_DMAPUT);
	dmaget = host1x_ch_readl(ch, HOST1X_CHANNEL_DMAGET);
	dmactrl = host1x_ch_readl(ch, HOST1X_CHANNEL_DMACTRL);
	cbread = host1x_sync_readl(host, HOST1X_SYNC_CBREAD(ch->id));
	cbstat = host1x_sync_readl(host, HOST1X_SYNC_CBSTAT(ch->id));

	host1x_debug_output(o, "%u-%s: ", ch->id, dev_name(ch->dev));

	if (HOST1X_CHANNEL_DMACTRL_DMASTOP_V(dmactrl) \|\|
	!ch->cdma.push_buffer.mapped) {
	host1x_debug_output(o, "inactive\n\n");
	return;
	}

	if (HOST1X_SYNC_CBSTAT_CBCLASS_V(cbstat) == HOST1X_CLASS_HOST1X &&
	HOST1X_SYNC_CBSTAT_CBOFFSET_V(cbstat) ==
	HOST1X_UCLASS_WAIT_SYNCPT)
	host1x_debug_output(o, "waiting on syncpt %d val %d\n",
	cbread >> 24, cbread & 0xffffff);
	else if (HOST1X_SYNC_CBSTAT_CBCLASS_V(cbstat) ==
	HOST1X_CLASS_HOST1X &&
	HOST1X_SYNC_CBSTAT_CBOFFSET_V(cbstat) ==
	HOST1X_UCLASS_WAIT_SYNCPT_BASE) {
	base = (cbread >> 16) & 0xff;
	baseval =
	host1x_sync_readl(host, HOST1X_SYNC_SYNCPT_BASE(base));
	val = cbread & 0xffff;
	host1x_debug_output(o, "waiting on syncpt %d val %d (base %d = %d; offset = %d)\n",
	cbread >> 24, baseval + val, base,
	baseval, val);
	} else
	host1x_debug_output(o, "active class %02x, offset %04x, val %08x\n",
	HOST1X_SYNC_CBSTAT_CBCLASS_V(cbstat),
	HOST1X_SYNC_CBSTAT_CBOFFSET_V(cbstat),
	cbread);

	host1x_debug_output(o, "DMAPUT %08x, DMAGET %08x, DMACTL %08x\n",
	dmaput, dmaget, dmactrl);
	host1x_debug_output(o, "CBREAD %08x, CBSTAT %08x\n", cbread, cbstat);

	show_channel_gathers(o, cdma);
	host1x_debug_output(o, "\n");
	}

	static void host1x_debug_show_channel_fifo(struct host1x *host,
	struct host1x_channel *ch,
	struct output *o)
	{
	u32 val, rd_ptr, wr_ptr, start, end;
	unsigned int data_count = 0;

	host1x_debug_output(o, "%u: fifo:\n", ch->id);

	val = host1x_ch_readl(ch, HOST1X_CHANNEL_FIFOSTAT);
	host1x_debug_output(o, "FIFOSTAT %08x\n", val);
	if (HOST1X_CHANNEL_FIFOSTAT_CFEMPTY_V(val)) {
	host1x_debug_output(o, "[empty]\n");
	return;
	}

	host1x_sync_writel(host, 0x0, HOST1X_SYNC_CFPEEK_CTRL);
	host1x_sync_writel(host, HOST1X_SYNC_CFPEEK_CTRL_ENA_F(1) \|
	HOST1X_SYNC_CFPEEK_CTRL_CHANNR_F(ch->id),
	HOST1X_SYNC_CFPEEK_CTRL);

	val = host1x_sync_readl(host, HOST1X_SYNC_CFPEEK_PTRS);
	rd_ptr = HOST1X_SYNC_CFPEEK_PTRS_CF_RD_PTR_V(val);
	wr_ptr = HOST1X_SYNC_CFPEEK_PTRS_CF_WR_PTR_V(val);

	val = host1x_sync_readl(host, HOST1X_SYNC_CF_SETUP(ch->id));
	start = HOST1X_SYNC_CF_SETUP_BASE_V(val);
	end = HOST1X_SYNC_CF_SETUP_LIMIT_V(val);

	do {
	host1x_sync_writel(host, 0x0, HOST1X_SYNC_CFPEEK_CTRL);
	host1x_sync_writel(host, HOST1X_SYNC_CFPEEK_CTRL_ENA_F(1) \|
	HOST1X_SYNC_CFPEEK_CTRL_CHANNR_F(ch->id) \|
	HOST1X_SYNC_CFPEEK_CTRL_ADDR_F(rd_ptr),
	HOST1X_SYNC_CFPEEK_CTRL);
	val = host1x_sync_readl(host, HOST1X_SYNC_CFPEEK_READ);

	if (!data_count) {
	host1x_debug_output(o, "%08x:", val);
	data_count = show_channel_command(o, val);
	} else {
	host1x_debug_output(o, "%08x%s", val,
	data_count > 0 ? ", " : "])\n");
	data_count--;
	}

	if (rd_ptr == end)
	rd_ptr = start;
	else
	rd_ptr++;
	} while (rd_ptr != wr_ptr);

	if (data_count)
	host1x_debug_output(o, ", ...])\n");
	host1x_debug_output(o, "\n");

	host1x_sync_writel(host, 0x0, HOST1X_SYNC_CFPEEK_CTRL);
	}

	static void host1x_debug_show_mlocks(struct host1x host, struct output o)
	{
	unsigned int i;

	host1x_debug_output(o, "---- mlocks ----\n");

	for (i = 0; i < host1x_syncpt_nb_mlocks(host); i++) {
	u32 owner =
	host1x_sync_readl(host, HOST1X_SYNC_MLOCK_OWNER(i));
	if (HOST1X_SYNC_MLOCK_OWNER_CH_OWNS_V(owner))
	host1x_debug_output(o, "%u: locked by channel %u\n",
	i, HOST1X_SYNC_MLOCK_OWNER_CHID_V(owner));
	else if (HOST1X_SYNC_MLOCK_OWNER_CPU_OWNS_V(owner))
	host1x_debug_output(o, "%u: locked by cpu\n", i);
	else
	host1x_debug_output(o, "%u: unlocked\n", i);
	}

	host1x_debug_output(o, "\n");
	}

	static const struct host1x_debug_ops host1x_debug_ops = {
	.show_channel_cdma = host1x_debug_show_channel_cdma,
	.show_channel_fifo = host1x_debug_show_channel_fifo,
	.show_mlocks = host1x_debug_show_mlocks,
	};