[PATCH 5/9] drm/amdkfd: Add new VI-specific queue properties

[Oded Gabbay]

From: Ben Goz <ben.goz at amd.com>

This patch adds new fields to the queue_properties structure. The new fields
are relevant only for queues running on AMD GPU VI architecture.

The eop_ring_buffer_address and eop_ring_buffer_size describe an
end-of-pipe queue which is assigned to the MQD. In CI, the EOP queue was per
pipeline and in VI it is per queue.

The ctx_save_restore_area_address and ctx_save_restore_area_size describe a
memory area that is designated to allow the CP to do context save/restore in
mid-wave state.

This patch also modifies the set_queue_properties_from_user() (called from
kfd_ioctl_create_queue()) to check and copy those new parameters.

Signed-off-by: Ben Goz <ben.goz at amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay at amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 31 ++++++++++++++++++++++++++++++-
 drivers/gpu/drm/amd/amdkfd/kfd_priv.h    |  5 +++++
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 1d9a447..41108dd 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -149,6 +149,8 @@ static long kfd_ioctl_get_version(struct file *filep, struct kfd_process *p,
 static int set_queue_properties_from_user(struct queue_properties *q_properties,
 				struct kfd_ioctl_create_queue_args *args)
 {
+	void *tmp;
+
 	if (args->queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
 		pr_err("kfd: queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
 		return -EINVAL;
@@ -186,6 +188,20 @@ static int set_queue_properties_from_user(struct queue_properties *q_properties,
 		return -EFAULT;
 	}
 
+	tmp = (void *)(uintptr_t)args->eop_buffer_address;
+	if (tmp != NULL &&
+		!access_ok(VERIFY_WRITE, tmp, sizeof(uint32_t))) {
+		pr_debug("kfd: can't access eop buffer");
+		return -EFAULT;
+	}
+
+	tmp = (void *)(uintptr_t)args->ctx_save_restore_address;
+	if (tmp != NULL &&
+		!access_ok(VERIFY_WRITE, tmp, sizeof(uint32_t))) {
+		pr_debug("kfd: can't access ctx save restore buffer");
+		return -EFAULT;
+	}
+
 	q_properties->is_interop = false;
 	q_properties->queue_percent = args->queue_percentage;
 	q_properties->priority = args->queue_priority;
@@ -193,6 +209,11 @@ static int set_queue_properties_from_user(struct queue_properties *q_properties,
 	q_properties->queue_size = args->ring_size;
 	q_properties->read_ptr = (uint32_t *) args->read_pointer_address;
 	q_properties->write_ptr = (uint32_t *) args->write_pointer_address;
+	q_properties->eop_ring_buffer_address = args->eop_buffer_address;
+	q_properties->eop_ring_buffer_size = args->eop_buffer_size;
+	q_properties->ctx_save_restore_area_address =
+			args->ctx_save_restore_address;
+	q_properties->ctx_save_restore_area_size = args->ctx_save_restore_size;
 	if (args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE ||
 		args->queue_type == KFD_IOC_QUEUE_TYPE_COMPUTE_AQL)
 		q_properties->type = KFD_QUEUE_TYPE_COMPUTE;
@@ -224,6 +245,11 @@ static int set_queue_properties_from_user(struct queue_properties *q_properties,
 
 	pr_debug("Queue Format (%d)\n", q_properties->format);
 
+	pr_debug("Queue EOP (0x%llX)\n", q_properties->eop_ring_buffer_address);
+
+	pr_debug("Queue CTX save arex (0x%llX)\n",
+			q_properties->ctx_save_restore_area_address);
+
 	return 0;
 }
 
@@ -248,9 +274,12 @@ static long kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
 	if (err)
 		return err;
 
+	pr_debug("kfd: looking for gpu id 0x%x\n", args.gpu_id);
 	dev = kfd_device_by_id(args.gpu_id);
-	if (dev == NULL)
+	if (dev == NULL) {
+		pr_debug("kfd: gpu id 0x%x was not found\n", args.gpu_id);
 		return -EINVAL;
+	}
 
 	mutex_lock(&p->mutex);
 
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index a79c217..3ba34b7 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -299,6 +299,11 @@ struct queue_properties {
 	uint32_t sdma_engine_id;
 	uint32_t sdma_queue_id;
 	uint32_t sdma_vm_addr;
+	/* Relevant only for VI */
+	uint64_t eop_ring_buffer_address;
+	uint32_t eop_ring_buffer_size;
+	uint64_t ctx_save_restore_area_address;
+	uint32_t ctx_save_restore_area_size;
 };
 
 /**
-- 
1.9.1