Commit 7295e00d authored by Eric Huang's avatar Eric Huang Committed by Alex Deucher
Browse files

drm/amdkfd: add pasid debugfs entries 



the entries will be appearing at
/sys/kernel/debug/kfd/proc/<pid>/pasid_<gpuid>.

Signed-off-by: default avatarEric Huang <jinhuieric.huang@amd.com>
Reviewed-by: default avatarHarish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 56801cb8

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

+76 −0
Original line number Diff line number Diff line
@@ -27,6 +27,16 @@ 
#include "kfd_priv.h"



static struct dentry *debugfs_root;

static struct dentry *debugfs_proc;

static struct list_head procs;



struct debugfs_proc_entry {

	struct list_head list;

	struct dentry *proc_dentry;

	pid_t pid;

};



#define MAX_DEBUGFS_FILENAME_LEN 32



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

{
@@ -92,6 +102,8 @@ static const struct file_operations kfd_debugfs_hang_hws_fops = { 
void kfd_debugfs_init(void)

{

	debugfs_root = debugfs_create_dir("kfd", NULL);

	debugfs_proc = debugfs_create_dir("proc", debugfs_root);

	INIT_LIST_HEAD(&procs);



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

			    kfd_debugfs_mqds_by_process, &kfd_debugfs_fops);
@@ -107,5 +119,69 @@ void kfd_debugfs_init(void) 


void kfd_debugfs_fini(void)

{

	debugfs_remove_recursive(debugfs_proc);

	debugfs_remove_recursive(debugfs_root);

}



static ssize_t kfd_debugfs_pasid_read(struct file *file, char __user *buf,

				      size_t count, loff_t *ppos)

{

	struct kfd_process_device *pdd = file_inode(file)->i_private;

	char tmp[32];

	int len;



	len = snprintf(tmp, sizeof(tmp), "%u\n", pdd->pasid);



	return simple_read_from_buffer(buf, count, ppos, tmp, len);

}



static const struct file_operations kfd_debugfs_pasid_fops = {

	.owner = THIS_MODULE,

	.read = kfd_debugfs_pasid_read,

};



void kfd_debugfs_add_process(struct kfd_process *p)

{

	int i;

	char name[MAX_DEBUGFS_FILENAME_LEN];

	struct debugfs_proc_entry *entry;



	entry = kzalloc(sizeof(*entry), GFP_KERNEL);

	if (!entry)

		return;



	list_add(&entry->list, &procs);

	entry->pid = p->lead_thread->pid;

	snprintf(name, MAX_DEBUGFS_FILENAME_LEN, "%d",

		 (int)entry->pid);

	entry->proc_dentry = debugfs_create_dir(name, debugfs_proc);



	/* Create debugfs files for each GPU:

	 * - proc/<pid>/pasid_<gpuid>

	 */

	for (i = 0; i < p->n_pdds; i++) {

		struct kfd_process_device *pdd = p->pdds[i];



		snprintf(name, MAX_DEBUGFS_FILENAME_LEN, "pasid_%u",

			 pdd->dev->id);

		debugfs_create_file((const char *)name, S_IFREG | 0444,

				    entry->proc_dentry, pdd,

				    &kfd_debugfs_pasid_fops);

	}

}



void kfd_debugfs_remove_process(struct kfd_process *p)

{

	struct debugfs_proc_entry *entry, *next;



	mutex_lock(&kfd_processes_mutex);

	list_for_each_entry_safe(entry, next, &procs, list) {

		if (entry->pid != p->lead_thread->pid)

			continue;



		debugfs_remove_recursive(entry->proc_dentry);

		list_del(&entry->list);

		kfree(entry);

	}

	mutex_unlock(&kfd_processes_mutex);

}

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

+5 −0
Original line number Diff line number Diff line
@@ -1581,10 +1581,15 @@ int kfd_debugfs_hang_hws(struct kfd_node *dev); 
int pm_debugfs_hang_hws(struct packet_manager *pm);

int dqm_debugfs_hang_hws(struct device_queue_manager *dqm);



void kfd_debugfs_add_process(struct kfd_process *p);

void kfd_debugfs_remove_process(struct kfd_process *p);



#else



static inline void kfd_debugfs_init(void) {}

static inline void kfd_debugfs_fini(void) {}

static inline void kfd_debugfs_add_process(struct kfd_process *p) {}

static inline void kfd_debugfs_remove_process(struct kfd_process *p) {}



#endif

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

+3 −0
Original line number Diff line number Diff line
@@ -900,6 +900,8 @@ struct kfd_process *kfd_create_process(struct task_struct *thread) 
		kfd_procfs_add_sysfs_files(process);

		kfd_procfs_add_sysfs_counters(process);



		kfd_debugfs_add_process(process);



		init_waitqueue_head(&process->wait_irq_drain);

	}

out:
@@ -1176,6 +1178,7 @@ static void kfd_process_wq_release(struct work_struct *work) 
		dma_fence_signal(ef);



	kfd_process_remove_sysfs(p);

	kfd_debugfs_remove_process(p);



	kfd_process_kunmap_signal_bo(p);

	kfd_process_free_outstanding_kfd_bos(p);