[PATCH v2 24/25] amdkfd: Implement the Get Process Aperture IOCTL

[Oded Gabbay <oded.gabbay@amd.com>]

From: Alexey Skidanov <Alexey.Skidanov@amd.com>

Signed-off-by: Alexey Skidanov <Alexey.Skidanov@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
---
 drivers/gpu/drm/radeon/amdkfd/kfd_chardev.c | 40 ++++++++++++++++++++++++++++-
 drivers/gpu/drm/radeon/amdkfd/kfd_priv.h    |  5 ++++
 2 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/amdkfd/kfd_chardev.c b/drivers/gpu/drm/radeon/amdkfd/kfd_chardev.c
index 72d8e79..1e19504 100644
--- a/drivers/gpu/drm/radeon/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/radeon/amdkfd/kfd_chardev.c
@@ -348,7 +348,45 @@ static long kfd_ioctl_get_clock_counters(struct file *filep, struct kfd_process
 
 static int kfd_ioctl_get_process_apertures(struct file *filp, struct kfd_process *p, void __user *arg)
 {
-	return -ENODEV;
+	struct kfd_ioctl_get_process_apertures_args args;
+	struct kfd_process_device *pdd;
+
+	dev_dbg(kfd_device, "get apertures for PASID %d", p->pasid);
+
+	if (copy_from_user(&args, arg, sizeof(args)))
+		return -EFAULT;
+
+	args.num_of_nodes = 0;
+
+	mutex_lock(&p->mutex);
+
+	/*if the process-device list isn't empty*/
+	if (kfd_has_process_device_data(p)) {
+		/* Run over all pdd of the process */
+		pdd = kfd_get_first_process_device_data(p);
+		do {
+
+			args.process_apertures[args.num_of_nodes].gpu_id = pdd->dev->id;
+			args.process_apertures[args.num_of_nodes].lds_base = pdd->lds_base;
+			args.process_apertures[args.num_of_nodes].lds_limit = pdd->lds_limit;
+			args.process_apertures[args.num_of_nodes].gpuvm_base = pdd->gpuvm_base;
+			args.process_apertures[args.num_of_nodes].gpuvm_limit = pdd->gpuvm_limit;
+			args.process_apertures[args.num_of_nodes].scratch_base = pdd->scratch_base;
+			args.process_apertures[args.num_of_nodes].scratch_limit = pdd->scratch_limit;
+
+			dev_dbg(kfd_device, "node id %u, gpu id %u, lds_base %llX lds_limit %llX gpuvm_base %llX gpuvm_limit %llX scratch_base %llX scratch_limit %llX",
+					args.num_of_nodes, pdd->dev->id, pdd->lds_base, pdd->lds_limit, pdd->gpuvm_base, pdd->gpuvm_limit, pdd->scratch_base, pdd->scratch_limit);
+			args.num_of_nodes++;
+		} while ((pdd = kfd_get_next_process_device_data(p, pdd)) != NULL &&
+				(args.num_of_nodes < NUM_OF_SUPPORTED_GPUS));
+	}
+
+	mutex_unlock(&p->mutex);
+
+	if (copy_to_user(arg, &args, sizeof(args)))
+		return -EFAULT;
+
+	return 0;
 }
 
 static long kfd_ioctl_pmc_acquire_access(struct file *filp, struct kfd_process *p, void __user *arg)
diff --git a/drivers/gpu/drm/radeon/amdkfd/kfd_priv.h b/drivers/gpu/drm/radeon/amdkfd/kfd_priv.h
index 7ea0e81..1db1ede 100644
--- a/drivers/gpu/drm/radeon/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/radeon/amdkfd/kfd_priv.h
@@ -346,6 +346,11 @@ void kfd_unbind_process_from_device(struct kfd_dev *dev, pasid_t pasid);
 struct kfd_process_device *kfd_get_process_device_data(struct kfd_dev *dev,
 							struct kfd_process *p);
 
+/* Process device data iterator */
+struct kfd_process_device *kfd_get_first_process_device_data(struct kfd_process *p);
+struct kfd_process_device *kfd_get_next_process_device_data(struct kfd_process *p, struct kfd_process_device *pdd);
+bool kfd_has_process_device_data(struct kfd_process *p);
+
 /* PASIDs */
 int kfd_pasid_init(void);
 void kfd_pasid_exit(void);
-- 
1.9.1