[PATCH V3 11/13] amdkfd: remove DIQ support
Felix Kuehling
felix.kuehling at amd.com
Thu Aug 7 21:03:36 UTC 2025
On 2025-08-04 7:05, Zhu Lingshan wrote:
> This commit remove DIQ support because it has been
> marked as DEPRECATED since 2022 in commit 5bdd3eb2
I think you can also remove KFD_QUEUE_TYPE_DIQ from enum kfd_queue_type in kfd_priv.h.
See two more comments inline ...
>
> Signed-off-by: Zhu Lingshan <lingshan.zhu at amd.com>
> ---
> .../drm/amd/amdkfd/kfd_device_queue_manager.c | 6 +--
> drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c | 26 ++-----------
> .../drm/amd/amdkfd/kfd_packet_manager_v9.c | 4 --
> .../drm/amd/amdkfd/kfd_packet_manager_vi.c | 4 --
> .../amd/amdkfd/kfd_process_queue_manager.c | 39 +------------------
> 5 files changed, 7 insertions(+), 72 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> index 2d91027e2a74..58e47e14cf07 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> @@ -399,8 +399,7 @@ static void increment_queue_count(struct device_queue_manager *dqm,
> struct queue *q)
> {
> dqm->active_queue_count++;
> - if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE ||
> - q->properties.type == KFD_QUEUE_TYPE_DIQ)
> + if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE)
> dqm->active_cp_queue_count++;
>
> if (q->properties.is_gws) {
> @@ -414,8 +413,7 @@ static void decrement_queue_count(struct device_queue_manager *dqm,
> struct queue *q)
> {
> dqm->active_queue_count--;
> - if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE ||
> - q->properties.type == KFD_QUEUE_TYPE_DIQ)
> + if (q->properties.type == KFD_QUEUE_TYPE_COMPUTE)
> dqm->active_cp_queue_count--;
>
> if (q->properties.is_gws) {
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
> index ebee37937783..f676b7419984 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c
> @@ -46,7 +46,7 @@ static bool kq_initialize(struct kernel_queue *kq, struct kfd_node *dev,
> int retval;
> union PM4_MES_TYPE_3_HEADER nop;
>
> - if (WARN_ON(type != KFD_QUEUE_TYPE_DIQ && type != KFD_QUEUE_TYPE_HIQ))
> + if (WARN_ON(type != KFD_QUEUE_TYPE_HIQ))
> return false;
You're returning early here for invalid queue types. That's fine, but see below ...
>
> pr_debug("Initializing queue type %d size %d\n", KFD_QUEUE_TYPE_HIQ,
> @@ -61,14 +61,9 @@ static bool kq_initialize(struct kernel_queue *kq, struct kfd_node *dev,
>
> kq->dev = dev;
> kq->nop_packet = nop.u32all;
> - switch (type) {
> - case KFD_QUEUE_TYPE_DIQ:
> - kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_DIQ];
> - break;
> - case KFD_QUEUE_TYPE_HIQ:
> + if (type == KFD_QUEUE_TYPE_HIQ)
> kq->mqd_mgr = dev->dqm->mqd_mgrs[KFD_MQD_TYPE_HIQ];
> - break;
> - default:
> + else {
> dev_err(dev->adev->dev, "Invalid queue type %d\n", type);
> return false;
I think this code is unreachable because you returned above for any invalid queue type. You can just remove both the if and the else branch. Just assign the kq->mqd_mgr unconditionally.
Regards,
Felix
> }
> @@ -163,24 +158,11 @@ static bool kq_initialize(struct kernel_queue *kq, struct kfd_node *dev,
> kq->mqd_mgr->load_mqd(kq->mqd_mgr, kq->queue->mqd,
> kq->queue->pipe, kq->queue->queue,
> &kq->queue->properties, NULL);
> - } else {
> - /* allocate fence for DIQ */
> -
> - retval = kfd_gtt_sa_allocate(dev, sizeof(uint32_t),
> - &kq->fence_mem_obj);
> -
> - if (retval != 0)
> - goto err_alloc_fence;
> -
> - kq->fence_kernel_address = kq->fence_mem_obj->cpu_ptr;
> - kq->fence_gpu_addr = kq->fence_mem_obj->gpu_addr;
> }
>
> print_queue(kq->queue);
>
> return true;
> -err_alloc_fence:
> - kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd, kq->queue->mqd_mem_obj);
> err_allocate_mqd:
> uninit_queue(kq->queue);
> err_init_queue:
> @@ -210,8 +192,6 @@ static void kq_uninitialize(struct kernel_queue *kq)
> kq->queue->queue);
> up_read(&kq->dev->adev->reset_domain->sem);
> }
> - else if (kq->queue->properties.type == KFD_QUEUE_TYPE_DIQ)
> - kfd_gtt_sa_free(kq->dev, kq->fence_mem_obj);
>
> kq->mqd_mgr->free_mqd(kq->mqd_mgr, kq->queue->mqd,
> kq->queue->mqd_mem_obj);
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c b/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c
> index 505036968a77..3d2375817c3e 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_v9.c
> @@ -252,10 +252,6 @@ static int pm_map_queues_v9(struct packet_manager *pm, uint32_t *buffer,
> packet->bitfields2.queue_type =
> queue_type__mes_map_queues__normal_latency_static_queue_vi;
> break;
> - case KFD_QUEUE_TYPE_DIQ:
> - packet->bitfields2.queue_type =
> - queue_type__mes_map_queues__debug_interface_queue_vi;
> - break;
> case KFD_QUEUE_TYPE_SDMA:
> case KFD_QUEUE_TYPE_SDMA_XGMI:
> if (q->properties.sdma_engine_id < 2 &&
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_vi.c b/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_vi.c
> index a1de5d7e173a..60086e7cc258 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_vi.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager_vi.c
> @@ -166,10 +166,6 @@ static int pm_map_queues_vi(struct packet_manager *pm, uint32_t *buffer,
> packet->bitfields2.queue_type =
> queue_type__mes_map_queues__normal_latency_static_queue_vi;
> break;
> - case KFD_QUEUE_TYPE_DIQ:
> - packet->bitfields2.queue_type =
> - queue_type__mes_map_queues__debug_interface_queue_vi;
> - break;
> case KFD_QUEUE_TYPE_SDMA:
> case KFD_QUEUE_TYPE_SDMA_XGMI:
> packet->bitfields2.engine_sel = q->properties.sdma_engine_id +
> 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 c643e0ccec52..e36950e7e14f 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
> @@ -345,7 +345,7 @@ int pqm_create_queue(struct process_queue_manager *pqm,
> * If we are just about to create DIQ, the is_debug flag is not set yet
> * Hence we also check the type as well
> */
> - if ((pdd->qpd.is_debug) || (type == KFD_QUEUE_TYPE_DIQ))
> + if ((pdd->qpd.is_debug))
> max_queues = dev->kfd->device_info.max_no_of_hqd/2;
>
> if (pdd->qpd.queue_count >= max_queues)
> @@ -426,22 +426,6 @@ int pqm_create_queue(struct process_queue_manager *pqm,
> restore_mqd, restore_ctl_stack);
> print_queue(q);
> break;
> - case KFD_QUEUE_TYPE_DIQ:
> - kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_DIQ);
> - if (!kq) {
> - retval = -ENOMEM;
> - goto err_create_queue;
> - }
> - kq->queue->properties.queue_id = *qid;
> - pqn->kq = kq;
> - pqn->q = NULL;
> - retval = kfd_process_drain_interrupts(pdd);
> - if (retval)
> - break;
> -
> - retval = dev->dqm->ops.create_kernel_queue(dev->dqm,
> - kq, &pdd->qpd);
> - break;
> default:
> WARN(1, "Invalid queue type %d", type);
> retval = -EINVAL;
> @@ -1121,32 +1105,13 @@ int pqm_debugfs_mqds(struct seq_file *m, void *data)
> break;
> default:
> seq_printf(m,
> - " Bad user queue type %d on device %x\n",
> + " Qeueu node with bad user queue type %d on device %x\n",
> q->properties.type, q->device->id);
> continue;
> }
> mqd_mgr = q->device->dqm->mqd_mgrs[mqd_type];
> size = mqd_mgr->mqd_stride(mqd_mgr,
> &q->properties);
> - } else if (pqn->kq) {
> - q = pqn->kq->queue;
> - mqd_mgr = pqn->kq->mqd_mgr;
> - switch (q->properties.type) {
> - case KFD_QUEUE_TYPE_DIQ:
> - seq_printf(m, " DIQ on device %x\n",
> - pqn->kq->dev->id);
> - break;
> - default:
> - seq_printf(m,
> - " Bad kernel queue type %d on device %x\n",
> - q->properties.type,
> - pqn->kq->dev->id);
> - continue;
> - }
> - } else {
> - seq_printf(m,
> - " Weird: Queue node with neither kernel nor user queue\n");
> - continue;
> }
>
> for (xcc = 0; xcc < num_xccs; xcc++) {
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