On 2019-05-23 6:41 p.m., Zeng, Oak wrote:
> Add a new kfd ioctl to allocate queue GWS. Queue
> GWS is released on queue destroy.
>
> Change-Id: I60153c26a577992ad873e4292e759e5c3d5bbd15
> Signed-off-by: Oak Zeng <Oak.Zeng@xxxxxxx>
Reviewed-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
> ---
> drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 27 +++++++++++++++++++++++++++
> include/uapi/linux/kfd_ioctl.h | 20 +++++++++++++++++++-
> 2 files changed, 46 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> index 38ae53f..455a3db 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
> @@ -1559,6 +1559,31 @@ static int kfd_ioctl_unmap_memory_from_gpu(struct file *filep,
> return err;
> }
>
> +static int kfd_ioctl_alloc_queue_gws(struct file *filep,
> + struct kfd_process *p, void *data)
> +{
> + int retval;
> + struct kfd_ioctl_alloc_queue_gws_args *args = data;
> + struct kfd_dev *dev = NULL;
> +
> + if (!hws_gws_support ||
> + dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS)
> + return -EINVAL;
> +
> + dev = kfd_device_by_id(args->gpu_id);
> + if (!dev) {
> + pr_debug("Could not find gpu id 0x%x\n", args->gpu_id);
> + return -EINVAL;
> + }
> +
> + mutex_lock(&p->mutex);
> + retval = pqm_set_gws(&p->pqm, args->queue_id, args->num_gws ? dev->gws : NULL);
> + mutex_unlock(&p->mutex);
> +
> + args->first_gws = 0;
> + return retval;
> +}
> +
> static int kfd_ioctl_get_dmabuf_info(struct file *filep,
> struct kfd_process *p, void *data)
> {
> @@ -1761,6 +1786,8 @@ static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = {
> AMDKFD_IOCTL_DEF(AMDKFD_IOC_IMPORT_DMABUF,
> kfd_ioctl_import_dmabuf, 0),
>
> + AMDKFD_IOCTL_DEF(AMDKFD_IOC_ALLOC_QUEUE_GWS,
> + kfd_ioctl_alloc_queue_gws, 0),
> };
>
> #define AMDKFD_CORE_IOCTL_COUNT ARRAY_SIZE(amdkfd_ioctls)
> diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h
> index 20917c5..070d1bc 100644
> --- a/include/uapi/linux/kfd_ioctl.h
> +++ b/include/uapi/linux/kfd_ioctl.h
> @@ -410,6 +410,21 @@ struct kfd_ioctl_unmap_memory_from_gpu_args {
> __u32 n_success; /* to/from KFD */
> };
>
> +/* Allocate GWS for specific queue
> + *
> + * @gpu_id: device identifier
> + * @queue_id: queue's id that GWS is allocated for
> + * @num_gws: how many GWS to allocate
> + * @first_gws: index of the first GWS allocated.
> + * only support contiguous GWS allocation
> + */
> +struct kfd_ioctl_alloc_queue_gws_args {
> + __u32 gpu_id; /* to KFD */
> + __u32 queue_id; /* to KFD */
> + __u32 num_gws; /* to KFD */
> + __u32 first_gws; /* from KFD */
> +};
> +
> struct kfd_ioctl_get_dmabuf_info_args {
> __u64 size; /* from KFD */
> __u64 metadata_ptr; /* to KFD */
> @@ -529,7 +544,10 @@ enum kfd_mmio_remap {
> #define AMDKFD_IOC_IMPORT_DMABUF \
> AMDKFD_IOWR(0x1D, struct kfd_ioctl_import_dmabuf_args)
>
> +#define AMDKFD_IOC_ALLOC_QUEUE_GWS \
> + AMDKFD_IOWR(0x1E, struct kfd_ioctl_alloc_queue_gws_args)
> +
> #define AMDKFD_COMMAND_START 0x01
> -#define AMDKFD_COMMAND_END 0x1E
> +#define AMDKFD_COMMAND_END 0x1F
>
> #endif
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