Re: [PATCH 4/7] drm/amdkfd: Add function to set queue gws

["Kuehling, Felix" <Felix.Kuehling-5C7GfCeVMHo@public.gmane.org>]

On 2019-05-15 4:37 p.m., Zeng, Oak wrote:
> Add functions in process queue manager to
> set/get queue gws. Also set process's number
> of gws used. Currently only one queue in
> process can use and use all gws.
>
> Change-Id: I03e480c8692db3eabfc3a188cce8904d5d962ab7
> Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>
> ---
>   drivers/gpu/drm/amd/amdkfd/kfd_priv.h              |  6 +++
>   .../gpu/drm/amd/amdkfd/kfd_process_queue_manager.c | 50 ++++++++++++++++++++++
>   2 files changed, 56 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
> index 5969e37..40a5c67 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
> @@ -454,6 +454,9 @@ struct queue_properties {
>    *
>    * @device: The kfd device that created this queue.
>    *
> + * @gws: Pointing to gws kgd_mem if this is a gws control queue; NULL
> + * otherwise.
> + *
>    * This structure represents user mode compute queues.
>    * It contains all the necessary data to handle such queues.
>    *
> @@ -475,6 +478,7 @@ struct queue {
>   
>   	struct kfd_process	*process;
>   	struct kfd_dev		*device;
> +	void *gws;
>   };
>   
>   /*
> @@ -868,6 +872,8 @@ int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid,
>   			struct queue_properties *p);
>   int pqm_set_cu_mask(struct process_queue_manager *pqm, unsigned int qid,
>   			struct queue_properties *p);
> +int pqm_set_gws(struct process_queue_manager *pqm, unsigned int qid,
> +			void *gws);
>   struct kernel_queue *pqm_get_kernel_queue(struct process_queue_manager *pqm,
>   						unsigned int qid);
>   int pqm_get_wave_state(struct process_queue_manager *pqm,
> 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 e652e25..8e45296 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
> @@ -26,6 +26,7 @@
>   #include "kfd_device_queue_manager.h"
>   #include "kfd_priv.h"
>   #include "kfd_kernel_queue.h"
> +#include "amdgpu_amdkfd.h"
>   
>   static inline struct process_queue_node *get_queue_by_qid(
>   			struct process_queue_manager *pqm, unsigned int qid)
> @@ -74,6 +75,55 @@ void kfd_process_dequeue_from_device(struct kfd_process_device *pdd)
>   	pdd->already_dequeued = true;
>   }
>   
> +int pqm_set_gws(struct process_queue_manager *pqm, unsigned int qid,
> +			void *gws)
> +{
> +	struct kfd_dev *dev = NULL;
> +	struct process_queue_node *pqn;
> +	struct kfd_process_device *pdd;
> +
> +	pqn = get_queue_by_qid(pqm, qid);
> +	if (!pqn) {
> +		pr_err("Queue id does not match any known queue\n");
> +		return -EINVAL;
> +	}
> +
> +	if (pqn->q)
> +		dev = pqn->q->device;
> +	if (WARN_ON(!dev))
> +		return -ENODEV;
> +
> +	pdd = kfd_get_process_device_data(dev, pqm->process);
> +	if (!pdd) {
> +		pr_err("Process device data doesn't exist\n");
> +		return -EINVAL;
> +	}
> +
> +	/* Only allow one queue per process can have GWS assigned */
> +	list_for_each_entry(pqn, &pqm->queues, process_queue_list) {
> +		if (pqn->q && pqn->q->gws)
> +			return -EINVAL;
> +	}
> +
> +	pqn->q->gws = gws;
> +	pdd->qpd.num_gws = gws ? amdgpu_amdkfd_get_num_gws(dev->kgd) : 0;

You'll have to call pqn->q->device->dqm->ops.update_queue somewhere, to 
make sure the runlist gets updated with the new GWS parameters. See 
pqm_update_queue or pqm_set_cu_mask for reference.

Regards,
   Felix


> +	return 0;
> +}
> +
> +static void *pqm_get_gws(struct process_queue_manager *pqm, unsigned int qid)
> +{
> +	struct process_queue_node *pqn;
> +
> +	pqn = get_queue_by_qid(pqm, qid);
> +	if (!pqn) {
> +		pr_debug("No queue %d exists for get gws operation\n", qid);
> +		return NULL;
> +	}
> +
> +	return pqn->q->gws;
> +}
> +
> +
>   void kfd_process_dequeue_from_all_devices(struct kfd_process *p)
>   {
>   	struct kfd_process_device *pdd;
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