the entries will be appearing at /sys/kernel/debug/kfd/proc/<pid>/pasid_<gpuid>.
Signed-off-by: Eric Huang <[email protected]> --- drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c | 77 ++++++++++++++++++++++++ drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 5 ++ drivers/gpu/drm/amd/amdkfd/kfd_process.c | 3 + 3 files changed, 85 insertions(+) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c b/drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c index 4a5a0a4e00f2..14ab770fb877 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_debugfs.c @@ -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 +119,70 @@ 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); +} diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h index f6aedf69c644..0ae794539bb0 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h @@ -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 diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c index 41d7dc8c2850..722ac1662bdc 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c @@ -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); -- 2.34.1
