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<pre>On 8/2/2025 12:10 AM, Felix Kuehling wrote:</pre>
<blockquote type="cite" cite="mid:d82d8f5b-f1d5-443b-a939-8e25717c6d62@amd.com">
<pre wrap="" class="moz-quote-pre">On 2025-08-01 4:55, Zhu Lingshan wrote:
</pre>
<blockquote type="cite">
<pre wrap="" class="moz-quote-pre">This commit decommissions the function kfd_get_process()
because it can not locate a specific kfd process among
mulitple contexts.
This commit refactors the relevant code path accordingly:
- kmmap: retrieve the kfd_process from filep->private_data
- kq_initialize: queue->process for HIQ should be set to NULL
because it does not belong to any kfd_process. DIQ has been
decommissioned in this commit because it has been marked as
DEPRECATED since 2022 in commit 5bdd3eb2
This commit removes test_kq() function becuse it has been
marked as unused since 2014 and no other functions calls it.
</pre>
</blockquote>
<pre wrap="" class="moz-quote-pre">
Please split this into 3 commits:
1. Change how kfd_mmap looks up the process
2. Remove DIQ support
3. Remove test_kq
</pre>
</blockquote>
<pre>Will do!</pre>
<blockquote type="cite" cite="mid:d82d8f5b-f1d5-443b-a939-8e25717c6d62@amd.com">
<pre wrap="" class="moz-quote-pre">
See one more comment inline.
</pre>
<blockquote type="cite">
<pre wrap="" class="moz-quote-pre">
Signed-off-by: Zhu Lingshan <a class="moz-txt-link-rfc2396E" href="mailto:lingshan.zhu@amd.com"><lingshan.zhu@amd.com></a>
---
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 11 ++--
.../drm/amd/amdkfd/kfd_device_queue_manager.c | 6 +-
drivers/gpu/drm/amd/amdkfd/kfd_kernel_queue.c | 60 ++-----------------
.../drm/amd/amdkfd/kfd_packet_manager_v9.c | 4 --
.../drm/amd/amdkfd/kfd_packet_manager_vi.c | 4 --
drivers/gpu/drm/amd/amdkfd/kfd_priv.h | 1 -
drivers/gpu/drm/amd/amdkfd/kfd_process.c | 18 ------
.../amd/amdkfd/kfd_process_queue_manager.c | 35 +----------
8 files changed, 16 insertions(+), 123 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 5b22e1c47b2e..9e95acd23889 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -3408,16 +3408,19 @@ static int kfd_mmio_mmap(struct kfd_node *dev, struct kfd_process *process,
}
-static int kfd_mmap(struct file *filp, struct vm_area_struct *vma)
+static int kfd_mmap(struct file *filep, struct vm_area_struct *vma)
{
struct kfd_process *process;
struct kfd_node *dev = NULL;
unsigned long mmap_offset;
unsigned int gpu_id;
- process = kfd_get_process(current);
- if (IS_ERR(process))
- return PTR_ERR(process);
+ process = filep->private_data;
+ if (!process)
+ return -ESRCH;
+
+ if (process->lead_thread != current->group_leader)
+ return -EBADF;
mmap_offset = vma->vm_pgoff << PAGE_SHIFT;
gpu_id = KFD_MMAP_GET_GPU_ID(mmap_offset);
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 76359c6a3f3a..3f78e0bb2dae 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 2b0a830f5b29..6aa8b0348bad 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;
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;
}
@@ -144,7 +139,8 @@ static bool kq_initialize(struct kernel_queue *kq, struct kfd_node *dev,
goto err_init_queue;
kq->queue->device = dev;
- kq->queue->process = kfd_get_process(current);
+ if (type == KFD_QUEUE_TYPE_HIQ)
+ kq->queue->process = NULL;
kq->queue->mqd_mem_obj = kq->mqd_mgr->allocate_mqd(kq->mqd_mgr->dev,
&kq->queue->properties);
@@ -162,24 +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:
@@ -209,8 +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);
@@ -358,34 +339,3 @@ void kernel_queue_uninit(struct kernel_queue *kq)
kq_uninitialize(kq);
kfree(kq);
}
-
-/* FIXME: Can this test be removed? */
-static __attribute__((unused)) void test_kq(struct kfd_node *dev)
-{
- struct kernel_queue *kq;
- uint32_t *buffer, i;
- int retval;
-
- dev_err(dev->adev->dev, "Starting kernel queue test\n");
-
- kq = kernel_queue_init(dev, KFD_QUEUE_TYPE_HIQ);
- if (unlikely(!kq)) {
- dev_err(dev->adev->dev, " Failed to initialize HIQ\n");
- dev_err(dev->adev->dev, "Kernel queue test failed\n");
- return;
- }
-
- retval = kq_acquire_packet_buffer(kq, 5, &buffer);
- if (unlikely(retval != 0)) {
- dev_err(dev->adev->dev, " Failed to acquire packet buffer\n");
- dev_err(dev->adev->dev, "Kernel queue test failed\n");
- return;
- }
- for (i = 0; i < 5; i++)
- buffer[i] = kq->nop_packet;
- kq_submit_packet(kq);
-
- dev_err(dev->adev->dev, "Ending kernel queue test\n");
-}
-
-
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_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
index a6e12c705734..67ebdaa9995f 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
@@ -1047,7 +1047,6 @@ void kfd_process_destroy_wq(void);
void kfd_cleanup_processes(void);
struct kfd_process *kfd_create_process(struct task_struct *thread);
int kfd_create_process_sysfs(struct kfd_process *process);
-struct kfd_process *kfd_get_process(const struct task_struct *task);
struct kfd_process *kfd_lookup_process_by_pasid(u32 pasid,
struct kfd_process_device **pdd);
struct kfd_process *kfd_lookup_process_by_mm(const struct mm_struct *mm);
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 117e524f4fb3..2d01356627ef 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -989,24 +989,6 @@ struct kfd_process *kfd_create_process(struct task_struct *thread)
return process;
}
-struct kfd_process *kfd_get_process(const struct task_struct *thread)
-{
- struct kfd_process *process;
-
- if (!thread->mm)
- return ERR_PTR(-EINVAL);
-
- /* Only the pthreads threading model is supported. */
- if (thread->group_leader->mm != thread->mm)
- return ERR_PTR(-EINVAL);
-
- process = find_process(thread, false);
- if (!process)
- return ERR_PTR(-EINVAL);
-
- return process;
-}
-
static struct kfd_process *find_process_by_mm(const struct mm_struct *mm)
{
struct kfd_process *process;
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..287ac5de838a 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;
@@ -1128,24 +1112,9 @@ int pqm_debugfs_mqds(struct seq_file *m, void *data)
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");
+ " Weird: Queue node with neither kernel nor user queue\n");
</pre>
</blockquote>
<pre wrap="" class="moz-quote-pre">
This message is no longer accurate, since this function no longer handles kernel queues at all.</pre>
</blockquote>
<pre>I will improve this message, drop kernel queue.
Thanks
Lingshan</pre>
<blockquote type="cite" cite="mid:d82d8f5b-f1d5-443b-a939-8e25717c6d62@amd.com">
<pre wrap="" class="moz-quote-pre">
Regards,
Felix
</pre>
<blockquote type="cite">
<pre wrap="" class="moz-quote-pre"> continue;
}
</pre>
</blockquote>
</blockquote>
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