1 files changed, 371 insertions, 4 deletions

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
index 5e5c84a8e1ef..6eca9509f2e3 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
@@ -1,5 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
 /*
- * Copyright 2014 Advanced Micro Devices, Inc.
+ * Copyright 2014-2022 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"),
@@ -42,6 +43,20 @@ static inline struct process_queue_node *get_queue_by_qid(
 	return NULL;
 }
 
+static int assign_queue_slot_by_qid(struct process_queue_manager *pqm,
+				    unsigned int qid)
+{
+	if (qid >= KFD_MAX_NUM_OF_QUEUES_PER_PROCESS)
+		return -EINVAL;
+
+	if (__test_and_set_bit(qid, pqm->queue_slot_bitmap)) {
+		pr_err("Cannot create new queue because requested qid(%u) is in use\n", qid);
+		return -ENOSPC;
+	}
+
+	return 0;
+}
+
 static int find_available_queue_slot(struct process_queue_manager *pqm,
 					unsigned int *qid)
 {
@@ -193,6 +208,9 @@ int pqm_create_queue(struct process_queue_manager *pqm,
 			    struct file *f,
 			    struct queue_properties *properties,
 			    unsigned int *qid,
+			    const struct kfd_criu_queue_priv_data *q_data,
+			    const void *restore_mqd,
+			    const void *restore_ctl_stack,
 			    uint32_t *p_doorbell_offset_in_process)
 {
 	int retval;
@@ -224,7 +242,12 @@ int pqm_create_queue(struct process_queue_manager *pqm,
 	if (pdd->qpd.queue_count >= max_queues)
 		return -ENOSPC;
 
-	retval = find_available_queue_slot(pqm, qid);
+	if (q_data) {
+		retval = assign_queue_slot_by_qid(pqm, q_data->q_id);
+		*qid = q_data->q_id;
+	} else
+		retval = find_available_queue_slot(pqm, qid);
+
 	if (retval != 0)
 		return retval;
 
@@ -252,7 +275,8 @@ int pqm_create_queue(struct process_queue_manager *pqm,
 			goto err_create_queue;
 		pqn->q = q;
 		pqn->kq = NULL;
-		retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
+		retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, q_data,
+						    restore_mqd, restore_ctl_stack);
 		print_queue(q);
 		break;
 
@@ -272,7 +296,8 @@ int pqm_create_queue(struct process_queue_manager *pqm,
 			goto err_create_queue;
 		pqn->q = q;
 		pqn->kq = NULL;
-		retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd);
+		retval = dev->dqm->ops.create_queue(dev->dqm, q, &pdd->qpd, q_data,
+						    restore_mqd, restore_ctl_stack);
 		print_queue(q);
 		break;
 	case KFD_QUEUE_TYPE_DIQ:
@@ -497,6 +522,348 @@ int pqm_get_wave_state(struct process_queue_manager *pqm,
 						       save_area_used_size);
 }
 
+static int get_queue_data_sizes(struct kfd_process_device *pdd,
+				struct queue *q,
+				uint32_t *mqd_size,
+				uint32_t *ctl_stack_size)
+{
+	int ret;
+
+	ret = pqm_get_queue_checkpoint_info(&pdd->process->pqm,
+					    q->properties.queue_id,
+					    mqd_size,
+					    ctl_stack_size);
+	if (ret)
+		pr_err("Failed to get queue dump info (%d)\n", ret);
+
+	return ret;
+}
+
+int kfd_process_get_queue_info(struct kfd_process *p,
+			       uint32_t *num_queues,
+			       uint64_t *priv_data_sizes)
+{
+	uint32_t extra_data_sizes = 0;
+	struct queue *q;
+	int i;
+	int ret;
+
+	*num_queues = 0;
+
+	/* Run over all PDDs of the process */
+	for (i = 0; i < p->n_pdds; i++) {
+		struct kfd_process_device *pdd = p->pdds[i];
+
+		list_for_each_entry(q, &pdd->qpd.queues_list, list) {
+			if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE ||
+				q->properties.type == KFD_QUEUE_TYPE_SDMA ||
+				q->properties.type == KFD_QUEUE_TYPE_SDMA_XGMI) {
+				uint32_t mqd_size, ctl_stack_size;
+
+				*num_queues = *num_queues + 1;
+
+				ret = get_queue_data_sizes(pdd, q, &mqd_size, &ctl_stack_size);
+				if (ret)
+					return ret;
+
+				extra_data_sizes += mqd_size + ctl_stack_size;
+			} else {
+				pr_err("Unsupported queue type (%d)\n", q->properties.type);
+				return -EOPNOTSUPP;
+			}
+		}
+	}
+	*priv_data_sizes = extra_data_sizes +
+				(*num_queues * sizeof(struct kfd_criu_queue_priv_data));
+
+	return 0;
+}
+
+static int pqm_checkpoint_mqd(struct process_queue_manager *pqm,
+			      unsigned int qid,
+			      void *mqd,
+			      void *ctl_stack)
+{
+	struct process_queue_node *pqn;
+
+	pqn = get_queue_by_qid(pqm, qid);
+	if (!pqn) {
+		pr_debug("amdkfd: No queue %d exists for operation\n", qid);
+		return -EFAULT;
+	}
+
+	if (!pqn->q->device->dqm->ops.checkpoint_mqd) {
+		pr_err("amdkfd: queue dumping not supported on this device\n");
+		return -EOPNOTSUPP;
+	}
+
+	return pqn->q->device->dqm->ops.checkpoint_mqd(pqn->q->device->dqm,
+						       pqn->q, mqd, ctl_stack);
+}
+
+static int criu_checkpoint_queue(struct kfd_process_device *pdd,
+			   struct queue *q,
+			   struct kfd_criu_queue_priv_data *q_data)
+{
+	uint8_t *mqd, *ctl_stack;
+	int ret;
+
+	mqd = (void *)(q_data + 1);
+	ctl_stack = mqd + q_data->mqd_size;
+
+	q_data->gpu_id = pdd->user_gpu_id;
+	q_data->type = q->properties.type;
+	q_data->format = q->properties.format;
+	q_data->q_id =  q->properties.queue_id;
+	q_data->q_address = q->properties.queue_address;
+	q_data->q_size = q->properties.queue_size;
+	q_data->priority = q->properties.priority;
+	q_data->q_percent = q->properties.queue_percent;
+	q_data->read_ptr_addr = (uint64_t)q->properties.read_ptr;
+	q_data->write_ptr_addr = (uint64_t)q->properties.write_ptr;
+	q_data->doorbell_id = q->doorbell_id;
+
+	q_data->sdma_id = q->sdma_id;
+
+	q_data->eop_ring_buffer_address =
+		q->properties.eop_ring_buffer_address;
+
+	q_data->eop_ring_buffer_size = q->properties.eop_ring_buffer_size;
+
+	q_data->ctx_save_restore_area_address =
+		q->properties.ctx_save_restore_area_address;
+
+	q_data->ctx_save_restore_area_size =
+		q->properties.ctx_save_restore_area_size;
+
+	ret = pqm_checkpoint_mqd(&pdd->process->pqm, q->properties.queue_id, mqd, ctl_stack);
+	if (ret) {
+		pr_err("Failed checkpoint queue_mqd (%d)\n", ret);
+		return ret;
+	}
+
+	pr_debug("Dumping Queue: gpu_id:%x queue_id:%u\n", q_data->gpu_id, q_data->q_id);
+	return ret;
+}
+
+static int criu_checkpoint_queues_device(struct kfd_process_device *pdd,
+				   uint8_t __user *user_priv,
+				   unsigned int *q_index,
+				   uint64_t *queues_priv_data_offset)
+{
+	unsigned int q_private_data_size = 0;
+	uint8_t *q_private_data = NULL; /* Local buffer to store individual queue private data */
+	struct queue *q;
+	int ret = 0;
+
+	list_for_each_entry(q, &pdd->qpd.queues_list, list) {
+		struct kfd_criu_queue_priv_data *q_data;
+		uint64_t q_data_size;
+		uint32_t mqd_size;
+		uint32_t ctl_stack_size;
+
+		if (q->properties.type != KFD_QUEUE_TYPE_COMPUTE &&
+			q->properties.type != KFD_QUEUE_TYPE_SDMA &&
+			q->properties.type != KFD_QUEUE_TYPE_SDMA_XGMI) {
+
+			pr_err("Unsupported queue type (%d)\n", q->properties.type);
+			ret = -EOPNOTSUPP;
+			break;
+		}
+
+		ret = get_queue_data_sizes(pdd, q, &mqd_size, &ctl_stack_size);
+		if (ret)
+			break;
+
+		q_data_size = sizeof(*q_data) + mqd_size + ctl_stack_size;
+
+		/* Increase local buffer space if needed */
+		if (q_private_data_size < q_data_size) {
+			kfree(q_private_data);
+
+			q_private_data = kzalloc(q_data_size, GFP_KERNEL);
+			if (!q_private_data) {
+				ret = -ENOMEM;
+				break;
+			}
+			q_private_data_size = q_data_size;
+		}
+
+		q_data = (struct kfd_criu_queue_priv_data *)q_private_data;
+
+		/* data stored in this order: priv_data, mqd, ctl_stack */
+		q_data->mqd_size = mqd_size;
+		q_data->ctl_stack_size = ctl_stack_size;
+
+		ret = criu_checkpoint_queue(pdd, q, q_data);
+		if (ret)
+			break;
+
+		q_data->object_type = KFD_CRIU_OBJECT_TYPE_QUEUE;
+
+		ret = copy_to_user(user_priv + *queues_priv_data_offset,
+				q_data, q_data_size);
+		if (ret) {
+			ret = -EFAULT;
+			break;
+		}
+		*queues_priv_data_offset += q_data_size;
+		*q_index = *q_index + 1;
+	}
+
+	kfree(q_private_data);
+
+	return ret;
+}
+
+int kfd_criu_checkpoint_queues(struct kfd_process *p,
+			 uint8_t __user *user_priv_data,
+			 uint64_t *priv_data_offset)
+{
+	int ret = 0, pdd_index, q_index = 0;
+
+	for (pdd_index = 0; pdd_index < p->n_pdds; pdd_index++) {
+		struct kfd_process_device *pdd = p->pdds[pdd_index];
+
+		/*
+		 * criu_checkpoint_queues_device will copy data to user and update q_index and
+		 * queues_priv_data_offset
+		 */
+		ret = criu_checkpoint_queues_device(pdd, user_priv_data, &q_index,
+					      priv_data_offset);
+
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+
+static void set_queue_properties_from_criu(struct queue_properties *qp,
+					  struct kfd_criu_queue_priv_data *q_data)
+{
+	qp->is_interop = false;
+	qp->is_gws = q_data->is_gws;
+	qp->queue_percent = q_data->q_percent;
+	qp->priority = q_data->priority;
+	qp->queue_address = q_data->q_address;
+	qp->queue_size = q_data->q_size;
+	qp->read_ptr = (uint32_t *) q_data->read_ptr_addr;
+	qp->write_ptr = (uint32_t *) q_data->write_ptr_addr;
+	qp->eop_ring_buffer_address = q_data->eop_ring_buffer_address;
+	qp->eop_ring_buffer_size = q_data->eop_ring_buffer_size;
+	qp->ctx_save_restore_area_address = q_data->ctx_save_restore_area_address;
+	qp->ctx_save_restore_area_size = q_data->ctx_save_restore_area_size;
+	qp->ctl_stack_size = q_data->ctl_stack_size;
+	qp->type = q_data->type;
+	qp->format = q_data->format;
+}
+
+int kfd_criu_restore_queue(struct kfd_process *p,
+			   uint8_t __user *user_priv_ptr,
+			   uint64_t *priv_data_offset,
+			   uint64_t max_priv_data_size)
+{
+	uint8_t *mqd, *ctl_stack, *q_extra_data = NULL;
+	struct kfd_criu_queue_priv_data *q_data;
+	struct kfd_process_device *pdd;
+	uint64_t q_extra_data_size;
+	struct queue_properties qp;
+	unsigned int queue_id;
+	int ret = 0;
+
+	if (*priv_data_offset + sizeof(*q_data) > max_priv_data_size)
+		return -EINVAL;
+
+	q_data = kmalloc(sizeof(*q_data), GFP_KERNEL);
+	if (!q_data)
+		return -ENOMEM;
+
+	ret = copy_from_user(q_data, user_priv_ptr + *priv_data_offset, sizeof(*q_data));
+	if (ret) {
+		ret = -EFAULT;
+		goto exit;
+	}
+
+	*priv_data_offset += sizeof(*q_data);
+	q_extra_data_size = (uint64_t)q_data->ctl_stack_size + q_data->mqd_size;
+
+	if (*priv_data_offset + q_extra_data_size > max_priv_data_size) {
+		ret = -EINVAL;
+		goto exit;
+	}
+
+	q_extra_data = kmalloc(q_extra_data_size, GFP_KERNEL);
+	if (!q_extra_data) {
+		ret = -ENOMEM;
+		goto exit;
+	}
+
+	ret = copy_from_user(q_extra_data, user_priv_ptr + *priv_data_offset, q_extra_data_size);
+	if (ret) {
+		ret = -EFAULT;
+		goto exit;
+	}
+
+	*priv_data_offset += q_extra_data_size;
+
+	pdd = kfd_process_device_data_by_id(p, q_data->gpu_id);
+	if (!pdd) {
+		pr_err("Failed to get pdd\n");
+		ret = -EINVAL;
+		goto exit;
+	}
+	/* data stored in this order: mqd, ctl_stack */
+	mqd = q_extra_data;
+	ctl_stack = mqd + q_data->mqd_size;
+
+	memset(&qp, 0, sizeof(qp));
+	set_queue_properties_from_criu(&qp, q_data);
+
+	print_queue_properties(&qp);
+
+	ret = pqm_create_queue(&p->pqm, pdd->dev, NULL, &qp, &queue_id, q_data, mqd, ctl_stack,
+				NULL);
+	if (ret) {
+		pr_err("Failed to create new queue err:%d\n", ret);
+		ret = -EINVAL;
+	}
+
+exit:
+	if (ret)
+		pr_err("Failed to create queue (%d)\n", ret);
+	else
+		pr_debug("Queue id %d was restored successfully\n", queue_id);
+
+	kfree(q_data);
+
+	return ret;
+}
+
+int pqm_get_queue_checkpoint_info(struct process_queue_manager *pqm,
+				  unsigned int qid,
+				  uint32_t *mqd_size,
+				  uint32_t *ctl_stack_size)
+{
+	struct process_queue_node *pqn;
+
+	pqn = get_queue_by_qid(pqm, qid);
+	if (!pqn) {
+		pr_debug("amdkfd: No queue %d exists for operation\n", qid);
+		return -EFAULT;
+	}
+
+	if (!pqn->q->device->dqm->ops.get_queue_checkpoint_info) {
+		pr_err("amdkfd: queue dumping not supported on this device\n");
+		return -EOPNOTSUPP;
+	}
+
+	pqn->q->device->dqm->ops.get_queue_checkpoint_info(pqn->q->device->dqm,
+						       pqn->q, mqd_size,
+						       ctl_stack_size);
+	return 0;
+}
+
 #if defined(CONFIG_DEBUG_FS)
 
 int pqm_debugfs_mqds(struct seq_file *m, void *data)