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Commit 851a645e authored by Felix Kuehling's avatar Felix Kuehling Committed by Oded Gabbay
Browse files

drm/amdkfd: Add debugfs support to KFD 



This commit adds several debugfs entries for kfd:

kfd/hqds: dumps all HQDs on all GPUs for KFD-controlled compute and
    SDMA RLC queues

kfd/mqds: dumps all MQDs of all KFD processes on all GPUs

kfd/rls: dumps HWS runlists on all GPUs

Signed-off-by: default avatarYong Zhao <yong.zhao@amd.com>
Signed-off-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: default avatarOded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: default avatarOded Gabbay <oded.gabbay@gmail.com>
parent 80c195f5

drivers/gpu/drm/amd/amdkfd/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -37,4 +37,6 @@ amdkfd-y := kfd_module.o kfd_device.o kfd_chardev.o kfd_topology.o \ 
		kfd_interrupt.o kfd_events.o cik_event_interrupt.o \

		kfd_dbgdev.o kfd_dbgmgr.o



amdkfd-$(CONFIG_DEBUG_FS) += kfd_debugfs.o



obj-$(CONFIG_HSA_AMD)	+= amdkfd.o

drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c

0 → 100644
+75 −0
Original line number Diff line number Diff line 
/*

 * Copyright 2016-2017 Advanced Micro Devices, Inc.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL

 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR

 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

 * OTHER DEALINGS IN THE SOFTWARE.

 */



#include <linux/debugfs.h>

#include "kfd_priv.h"



static struct dentry *debugfs_root;



static int kfd_debugfs_open(struct inode *inode, struct file *file)

{

	int (*show)(struct seq_file *, void *) = inode->i_private;



	return single_open(file, show, NULL);

}



static const struct file_operations kfd_debugfs_fops = {

	.owner = THIS_MODULE,

	.open = kfd_debugfs_open,

	.read = seq_read,

	.llseek = seq_lseek,

	.release = single_release,

};



void kfd_debugfs_init(void)

{

	struct dentry *ent;



	debugfs_root = debugfs_create_dir("kfd", NULL);

	if (!debugfs_root || debugfs_root == ERR_PTR(-ENODEV)) {

		pr_warn("Failed to create kfd debugfs dir\n");

		return;

	}



	ent = debugfs_create_file("mqds", S_IFREG | 0444, debugfs_root,

				  kfd_debugfs_mqds_by_process,

				  &kfd_debugfs_fops);

	if (!ent)

		pr_warn("Failed to create mqds in kfd debugfs\n");



	ent = debugfs_create_file("hqds", S_IFREG | 0444, debugfs_root,

				  kfd_debugfs_hqds_by_device,

				  &kfd_debugfs_fops);

	if (!ent)

		pr_warn("Failed to create hqds in kfd debugfs\n");



	ent = debugfs_create_file("rls", S_IFREG | 0444, debugfs_root,

				  kfd_debugfs_rls_by_device,

				  &kfd_debugfs_fops);

	if (!ent)

		pr_warn("Failed to create rls in kfd debugfs\n");

}



void kfd_debugfs_fini(void)

{

	debugfs_remove_recursive(debugfs_root);

}

drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c

+71 −0
Original line number Diff line number Diff line
@@ -1311,3 +1311,74 @@ void device_queue_manager_uninit(struct device_queue_manager *dqm) 
	dqm->ops.uninitialize(dqm);

	kfree(dqm);

}



#if defined(CONFIG_DEBUG_FS)



static void seq_reg_dump(struct seq_file *m,

			 uint32_t (*dump)[2], uint32_t n_regs)

{

	uint32_t i, count;



	for (i = 0, count = 0; i < n_regs; i++) {

		if (count == 0 ||

		    dump[i-1][0] + sizeof(uint32_t) != dump[i][0]) {

			seq_printf(m, "%s    %08x: %08x",

				   i ? "\n" : "",

				   dump[i][0], dump[i][1]);

			count = 7;

		} else {

			seq_printf(m, " %08x", dump[i][1]);

			count--;

		}

	}



	seq_puts(m, "\n");

}



int dqm_debugfs_hqds(struct seq_file *m, void *data)

{

	struct device_queue_manager *dqm = data;

	uint32_t (*dump)[2], n_regs;

	int pipe, queue;

	int r = 0;



	for (pipe = 0; pipe < get_pipes_per_mec(dqm); pipe++) {

		int pipe_offset = pipe * get_queues_per_pipe(dqm);



		for (queue = 0; queue < get_queues_per_pipe(dqm); queue++) {

			if (!test_bit(pipe_offset + queue,

				      dqm->dev->shared_resources.queue_bitmap))

				continue;



			r = dqm->dev->kfd2kgd->hqd_dump(

				dqm->dev->kgd, pipe, queue, &dump, &n_regs);

			if (r)

				break;



			seq_printf(m, "  CP Pipe %d, Queue %d\n",

				  pipe, queue);

			seq_reg_dump(m, dump, n_regs);



			kfree(dump);

		}

	}



	for (pipe = 0; pipe < CIK_SDMA_ENGINE_NUM; pipe++) {

		for (queue = 0; queue < CIK_SDMA_QUEUES_PER_ENGINE; queue++) {

			r = dqm->dev->kfd2kgd->hqd_sdma_dump(

				dqm->dev->kgd, pipe, queue, &dump, &n_regs);

			if (r)

				break;



			seq_printf(m, "  SDMA Engine %d, RLC %d\n",

				  pipe, queue);

			seq_reg_dump(m, dump, n_regs);



			kfree(dump);

		}

	}



	return r;

}



#endif

drivers/gpu/drm/amd/amdkfd/kfd_module.c

+3 −0
Original line number Diff line number Diff line
@@ -123,6 +123,8 @@ static int __init kfd_module_init(void) 


	kfd_process_create_wq();



	kfd_debugfs_init();



	amdkfd_init_completed = 1;



	dev_info(kfd_device, "Initialized module\n");
@@ -139,6 +141,7 @@ static void __exit kfd_module_exit(void) 
{

	amdkfd_init_completed = 0;



	kfd_debugfs_fini();

	kfd_process_destroy_wq();

	kfd_topology_shutdown();

	kfd_chardev_exit();

drivers/gpu/drm/amd/amdkfd/kfd_mqd_manager.h

+4 −0
Original line number Diff line number Diff line
@@ -85,6 +85,10 @@ struct mqd_manager { 
				uint64_t queue_address,	uint32_t pipe_id,

				uint32_t queue_id);



#if defined(CONFIG_DEBUG_FS)

	int	(*debugfs_show_mqd)(struct seq_file *m, void *data);

#endif



	struct mutex	mqd_mutex;

	struct kfd_dev	*dev;

};