mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
![Yong Zhao](/assets/img/avatar_default.png)
The new code uses straightforward bit shifts and thus has better readability. Signed-off-by: Yong Zhao <Yong.Zhao@amd.com> Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
1194 lines
30 KiB
C
1194 lines
30 KiB
C
/*
|
|
* Copyright 2014 Advanced Micro Devices, Inc.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include <linux/mutex.h>
|
|
#include <linux/log2.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/sched/mm.h>
|
|
#include <linux/sched/task.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/amd-iommu.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/compat.h>
|
|
#include <linux/mman.h>
|
|
#include <linux/file.h>
|
|
#include "amdgpu_amdkfd.h"
|
|
|
|
struct mm_struct;
|
|
|
|
#include "kfd_priv.h"
|
|
#include "kfd_device_queue_manager.h"
|
|
#include "kfd_dbgmgr.h"
|
|
#include "kfd_iommu.h"
|
|
|
|
/*
|
|
* List of struct kfd_process (field kfd_process).
|
|
* Unique/indexed by mm_struct*
|
|
*/
|
|
DEFINE_HASHTABLE(kfd_processes_table, KFD_PROCESS_TABLE_SIZE);
|
|
static DEFINE_MUTEX(kfd_processes_mutex);
|
|
|
|
DEFINE_SRCU(kfd_processes_srcu);
|
|
|
|
/* For process termination handling */
|
|
static struct workqueue_struct *kfd_process_wq;
|
|
|
|
/* Ordered, single-threaded workqueue for restoring evicted
|
|
* processes. Restoring multiple processes concurrently under memory
|
|
* pressure can lead to processes blocking each other from validating
|
|
* their BOs and result in a live-lock situation where processes
|
|
* remain evicted indefinitely.
|
|
*/
|
|
static struct workqueue_struct *kfd_restore_wq;
|
|
|
|
static struct kfd_process *find_process(const struct task_struct *thread);
|
|
static void kfd_process_ref_release(struct kref *ref);
|
|
static struct kfd_process *create_process(const struct task_struct *thread);
|
|
static int kfd_process_init_cwsr_apu(struct kfd_process *p, struct file *filep);
|
|
|
|
static void evict_process_worker(struct work_struct *work);
|
|
static void restore_process_worker(struct work_struct *work);
|
|
|
|
struct kfd_procfs_tree {
|
|
struct kobject *kobj;
|
|
};
|
|
|
|
static struct kfd_procfs_tree procfs;
|
|
|
|
static ssize_t kfd_procfs_show(struct kobject *kobj, struct attribute *attr,
|
|
char *buffer)
|
|
{
|
|
int val = 0;
|
|
|
|
if (strcmp(attr->name, "pasid") == 0) {
|
|
struct kfd_process *p = container_of(attr, struct kfd_process,
|
|
attr_pasid);
|
|
val = p->pasid;
|
|
} else {
|
|
pr_err("Invalid attribute");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return snprintf(buffer, PAGE_SIZE, "%d\n", val);
|
|
}
|
|
|
|
static void kfd_procfs_kobj_release(struct kobject *kobj)
|
|
{
|
|
kfree(kobj);
|
|
}
|
|
|
|
static const struct sysfs_ops kfd_procfs_ops = {
|
|
.show = kfd_procfs_show,
|
|
};
|
|
|
|
static struct kobj_type procfs_type = {
|
|
.release = kfd_procfs_kobj_release,
|
|
.sysfs_ops = &kfd_procfs_ops,
|
|
};
|
|
|
|
void kfd_procfs_init(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
procfs.kobj = kfd_alloc_struct(procfs.kobj);
|
|
if (!procfs.kobj)
|
|
return;
|
|
|
|
ret = kobject_init_and_add(procfs.kobj, &procfs_type,
|
|
&kfd_device->kobj, "proc");
|
|
if (ret) {
|
|
pr_warn("Could not create procfs proc folder");
|
|
/* If we fail to create the procfs, clean up */
|
|
kfd_procfs_shutdown();
|
|
}
|
|
}
|
|
|
|
void kfd_procfs_shutdown(void)
|
|
{
|
|
if (procfs.kobj) {
|
|
kobject_del(procfs.kobj);
|
|
kobject_put(procfs.kobj);
|
|
procfs.kobj = NULL;
|
|
}
|
|
}
|
|
|
|
int kfd_process_create_wq(void)
|
|
{
|
|
if (!kfd_process_wq)
|
|
kfd_process_wq = alloc_workqueue("kfd_process_wq", 0, 0);
|
|
if (!kfd_restore_wq)
|
|
kfd_restore_wq = alloc_ordered_workqueue("kfd_restore_wq", 0);
|
|
|
|
if (!kfd_process_wq || !kfd_restore_wq) {
|
|
kfd_process_destroy_wq();
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void kfd_process_destroy_wq(void)
|
|
{
|
|
if (kfd_process_wq) {
|
|
destroy_workqueue(kfd_process_wq);
|
|
kfd_process_wq = NULL;
|
|
}
|
|
if (kfd_restore_wq) {
|
|
destroy_workqueue(kfd_restore_wq);
|
|
kfd_restore_wq = NULL;
|
|
}
|
|
}
|
|
|
|
static void kfd_process_free_gpuvm(struct kgd_mem *mem,
|
|
struct kfd_process_device *pdd)
|
|
{
|
|
struct kfd_dev *dev = pdd->dev;
|
|
|
|
amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu(dev->kgd, mem, pdd->vm);
|
|
amdgpu_amdkfd_gpuvm_free_memory_of_gpu(dev->kgd, mem);
|
|
}
|
|
|
|
/* kfd_process_alloc_gpuvm - Allocate GPU VM for the KFD process
|
|
* This function should be only called right after the process
|
|
* is created and when kfd_processes_mutex is still being held
|
|
* to avoid concurrency. Because of that exclusiveness, we do
|
|
* not need to take p->mutex.
|
|
*/
|
|
static int kfd_process_alloc_gpuvm(struct kfd_process_device *pdd,
|
|
uint64_t gpu_va, uint32_t size,
|
|
uint32_t flags, void **kptr)
|
|
{
|
|
struct kfd_dev *kdev = pdd->dev;
|
|
struct kgd_mem *mem = NULL;
|
|
int handle;
|
|
int err;
|
|
|
|
err = amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(kdev->kgd, gpu_va, size,
|
|
pdd->vm, &mem, NULL, flags);
|
|
if (err)
|
|
goto err_alloc_mem;
|
|
|
|
err = amdgpu_amdkfd_gpuvm_map_memory_to_gpu(kdev->kgd, mem, pdd->vm);
|
|
if (err)
|
|
goto err_map_mem;
|
|
|
|
err = amdgpu_amdkfd_gpuvm_sync_memory(kdev->kgd, mem, true);
|
|
if (err) {
|
|
pr_debug("Sync memory failed, wait interrupted by user signal\n");
|
|
goto sync_memory_failed;
|
|
}
|
|
|
|
/* Create an obj handle so kfd_process_device_remove_obj_handle
|
|
* will take care of the bo removal when the process finishes.
|
|
* We do not need to take p->mutex, because the process is just
|
|
* created and the ioctls have not had the chance to run.
|
|
*/
|
|
handle = kfd_process_device_create_obj_handle(pdd, mem);
|
|
|
|
if (handle < 0) {
|
|
err = handle;
|
|
goto free_gpuvm;
|
|
}
|
|
|
|
if (kptr) {
|
|
err = amdgpu_amdkfd_gpuvm_map_gtt_bo_to_kernel(kdev->kgd,
|
|
(struct kgd_mem *)mem, kptr, NULL);
|
|
if (err) {
|
|
pr_debug("Map GTT BO to kernel failed\n");
|
|
goto free_obj_handle;
|
|
}
|
|
}
|
|
|
|
return err;
|
|
|
|
free_obj_handle:
|
|
kfd_process_device_remove_obj_handle(pdd, handle);
|
|
free_gpuvm:
|
|
sync_memory_failed:
|
|
kfd_process_free_gpuvm(mem, pdd);
|
|
return err;
|
|
|
|
err_map_mem:
|
|
amdgpu_amdkfd_gpuvm_free_memory_of_gpu(kdev->kgd, mem);
|
|
err_alloc_mem:
|
|
*kptr = NULL;
|
|
return err;
|
|
}
|
|
|
|
/* kfd_process_device_reserve_ib_mem - Reserve memory inside the
|
|
* process for IB usage The memory reserved is for KFD to submit
|
|
* IB to AMDGPU from kernel. If the memory is reserved
|
|
* successfully, ib_kaddr will have the CPU/kernel
|
|
* address. Check ib_kaddr before accessing the memory.
|
|
*/
|
|
static int kfd_process_device_reserve_ib_mem(struct kfd_process_device *pdd)
|
|
{
|
|
struct qcm_process_device *qpd = &pdd->qpd;
|
|
uint32_t flags = ALLOC_MEM_FLAGS_GTT |
|
|
ALLOC_MEM_FLAGS_NO_SUBSTITUTE |
|
|
ALLOC_MEM_FLAGS_WRITABLE |
|
|
ALLOC_MEM_FLAGS_EXECUTABLE;
|
|
void *kaddr;
|
|
int ret;
|
|
|
|
if (qpd->ib_kaddr || !qpd->ib_base)
|
|
return 0;
|
|
|
|
/* ib_base is only set for dGPU */
|
|
ret = kfd_process_alloc_gpuvm(pdd, qpd->ib_base, PAGE_SIZE, flags,
|
|
&kaddr);
|
|
if (ret)
|
|
return ret;
|
|
|
|
qpd->ib_kaddr = kaddr;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct kfd_process *kfd_create_process(struct file *filep)
|
|
{
|
|
struct kfd_process *process;
|
|
struct task_struct *thread = current;
|
|
int ret;
|
|
|
|
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);
|
|
|
|
/*
|
|
* take kfd processes mutex before starting of process creation
|
|
* so there won't be a case where two threads of the same process
|
|
* create two kfd_process structures
|
|
*/
|
|
mutex_lock(&kfd_processes_mutex);
|
|
|
|
/* A prior open of /dev/kfd could have already created the process. */
|
|
process = find_process(thread);
|
|
if (process) {
|
|
pr_debug("Process already found\n");
|
|
} else {
|
|
process = create_process(thread);
|
|
if (IS_ERR(process))
|
|
goto out;
|
|
|
|
ret = kfd_process_init_cwsr_apu(process, filep);
|
|
if (ret) {
|
|
process = ERR_PTR(ret);
|
|
goto out;
|
|
}
|
|
|
|
if (!procfs.kobj)
|
|
goto out;
|
|
|
|
process->kobj = kfd_alloc_struct(process->kobj);
|
|
if (!process->kobj) {
|
|
pr_warn("Creating procfs kobject failed");
|
|
goto out;
|
|
}
|
|
ret = kobject_init_and_add(process->kobj, &procfs_type,
|
|
procfs.kobj, "%d",
|
|
(int)process->lead_thread->pid);
|
|
if (ret) {
|
|
pr_warn("Creating procfs pid directory failed");
|
|
goto out;
|
|
}
|
|
|
|
process->attr_pasid.name = "pasid";
|
|
process->attr_pasid.mode = KFD_SYSFS_FILE_MODE;
|
|
sysfs_attr_init(&process->attr_pasid);
|
|
ret = sysfs_create_file(process->kobj, &process->attr_pasid);
|
|
if (ret)
|
|
pr_warn("Creating pasid for pid %d failed",
|
|
(int)process->lead_thread->pid);
|
|
}
|
|
out:
|
|
mutex_unlock(&kfd_processes_mutex);
|
|
|
|
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);
|
|
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;
|
|
|
|
hash_for_each_possible_rcu(kfd_processes_table, process,
|
|
kfd_processes, (uintptr_t)mm)
|
|
if (process->mm == mm)
|
|
return process;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static struct kfd_process *find_process(const struct task_struct *thread)
|
|
{
|
|
struct kfd_process *p;
|
|
int idx;
|
|
|
|
idx = srcu_read_lock(&kfd_processes_srcu);
|
|
p = find_process_by_mm(thread->mm);
|
|
srcu_read_unlock(&kfd_processes_srcu, idx);
|
|
|
|
return p;
|
|
}
|
|
|
|
void kfd_unref_process(struct kfd_process *p)
|
|
{
|
|
kref_put(&p->ref, kfd_process_ref_release);
|
|
}
|
|
|
|
static void kfd_process_device_free_bos(struct kfd_process_device *pdd)
|
|
{
|
|
struct kfd_process *p = pdd->process;
|
|
void *mem;
|
|
int id;
|
|
|
|
/*
|
|
* Remove all handles from idr and release appropriate
|
|
* local memory object
|
|
*/
|
|
idr_for_each_entry(&pdd->alloc_idr, mem, id) {
|
|
struct kfd_process_device *peer_pdd;
|
|
|
|
list_for_each_entry(peer_pdd, &p->per_device_data,
|
|
per_device_list) {
|
|
if (!peer_pdd->vm)
|
|
continue;
|
|
amdgpu_amdkfd_gpuvm_unmap_memory_from_gpu(
|
|
peer_pdd->dev->kgd, mem, peer_pdd->vm);
|
|
}
|
|
|
|
amdgpu_amdkfd_gpuvm_free_memory_of_gpu(pdd->dev->kgd, mem);
|
|
kfd_process_device_remove_obj_handle(pdd, id);
|
|
}
|
|
}
|
|
|
|
static void kfd_process_free_outstanding_kfd_bos(struct kfd_process *p)
|
|
{
|
|
struct kfd_process_device *pdd;
|
|
|
|
list_for_each_entry(pdd, &p->per_device_data, per_device_list)
|
|
kfd_process_device_free_bos(pdd);
|
|
}
|
|
|
|
static void kfd_process_destroy_pdds(struct kfd_process *p)
|
|
{
|
|
struct kfd_process_device *pdd, *temp;
|
|
|
|
list_for_each_entry_safe(pdd, temp, &p->per_device_data,
|
|
per_device_list) {
|
|
pr_debug("Releasing pdd (topology id %d) for process (pasid 0x%x)\n",
|
|
pdd->dev->id, p->pasid);
|
|
|
|
if (pdd->drm_file) {
|
|
amdgpu_amdkfd_gpuvm_release_process_vm(
|
|
pdd->dev->kgd, pdd->vm);
|
|
fput(pdd->drm_file);
|
|
}
|
|
else if (pdd->vm)
|
|
amdgpu_amdkfd_gpuvm_destroy_process_vm(
|
|
pdd->dev->kgd, pdd->vm);
|
|
|
|
list_del(&pdd->per_device_list);
|
|
|
|
if (pdd->qpd.cwsr_kaddr && !pdd->qpd.cwsr_base)
|
|
free_pages((unsigned long)pdd->qpd.cwsr_kaddr,
|
|
get_order(KFD_CWSR_TBA_TMA_SIZE));
|
|
|
|
kfree(pdd->qpd.doorbell_bitmap);
|
|
idr_destroy(&pdd->alloc_idr);
|
|
|
|
kfree(pdd);
|
|
}
|
|
}
|
|
|
|
/* No process locking is needed in this function, because the process
|
|
* is not findable any more. We must assume that no other thread is
|
|
* using it any more, otherwise we couldn't safely free the process
|
|
* structure in the end.
|
|
*/
|
|
static void kfd_process_wq_release(struct work_struct *work)
|
|
{
|
|
struct kfd_process *p = container_of(work, struct kfd_process,
|
|
release_work);
|
|
|
|
/* Remove the procfs files */
|
|
if (p->kobj) {
|
|
sysfs_remove_file(p->kobj, &p->attr_pasid);
|
|
kobject_del(p->kobj);
|
|
kobject_put(p->kobj);
|
|
p->kobj = NULL;
|
|
}
|
|
|
|
kfd_iommu_unbind_process(p);
|
|
|
|
kfd_process_free_outstanding_kfd_bos(p);
|
|
|
|
kfd_process_destroy_pdds(p);
|
|
dma_fence_put(p->ef);
|
|
|
|
kfd_event_free_process(p);
|
|
|
|
kfd_pasid_free(p->pasid);
|
|
kfd_free_process_doorbells(p);
|
|
|
|
mutex_destroy(&p->mutex);
|
|
|
|
put_task_struct(p->lead_thread);
|
|
|
|
kfree(p);
|
|
}
|
|
|
|
static void kfd_process_ref_release(struct kref *ref)
|
|
{
|
|
struct kfd_process *p = container_of(ref, struct kfd_process, ref);
|
|
|
|
INIT_WORK(&p->release_work, kfd_process_wq_release);
|
|
queue_work(kfd_process_wq, &p->release_work);
|
|
}
|
|
|
|
static void kfd_process_free_notifier(struct mmu_notifier *mn)
|
|
{
|
|
kfd_unref_process(container_of(mn, struct kfd_process, mmu_notifier));
|
|
}
|
|
|
|
static void kfd_process_notifier_release(struct mmu_notifier *mn,
|
|
struct mm_struct *mm)
|
|
{
|
|
struct kfd_process *p;
|
|
struct kfd_process_device *pdd = NULL;
|
|
|
|
/*
|
|
* The kfd_process structure can not be free because the
|
|
* mmu_notifier srcu is read locked
|
|
*/
|
|
p = container_of(mn, struct kfd_process, mmu_notifier);
|
|
if (WARN_ON(p->mm != mm))
|
|
return;
|
|
|
|
mutex_lock(&kfd_processes_mutex);
|
|
hash_del_rcu(&p->kfd_processes);
|
|
mutex_unlock(&kfd_processes_mutex);
|
|
synchronize_srcu(&kfd_processes_srcu);
|
|
|
|
cancel_delayed_work_sync(&p->eviction_work);
|
|
cancel_delayed_work_sync(&p->restore_work);
|
|
|
|
mutex_lock(&p->mutex);
|
|
|
|
/* Iterate over all process device data structures and if the
|
|
* pdd is in debug mode, we should first force unregistration,
|
|
* then we will be able to destroy the queues
|
|
*/
|
|
list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
|
|
struct kfd_dev *dev = pdd->dev;
|
|
|
|
mutex_lock(kfd_get_dbgmgr_mutex());
|
|
if (dev && dev->dbgmgr && dev->dbgmgr->pasid == p->pasid) {
|
|
if (!kfd_dbgmgr_unregister(dev->dbgmgr, p)) {
|
|
kfd_dbgmgr_destroy(dev->dbgmgr);
|
|
dev->dbgmgr = NULL;
|
|
}
|
|
}
|
|
mutex_unlock(kfd_get_dbgmgr_mutex());
|
|
}
|
|
|
|
kfd_process_dequeue_from_all_devices(p);
|
|
pqm_uninit(&p->pqm);
|
|
|
|
/* Indicate to other users that MM is no longer valid */
|
|
p->mm = NULL;
|
|
|
|
mutex_unlock(&p->mutex);
|
|
|
|
mmu_notifier_put(&p->mmu_notifier);
|
|
}
|
|
|
|
static const struct mmu_notifier_ops kfd_process_mmu_notifier_ops = {
|
|
.release = kfd_process_notifier_release,
|
|
.free_notifier = kfd_process_free_notifier,
|
|
};
|
|
|
|
static int kfd_process_init_cwsr_apu(struct kfd_process *p, struct file *filep)
|
|
{
|
|
unsigned long offset;
|
|
struct kfd_process_device *pdd;
|
|
|
|
list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
|
|
struct kfd_dev *dev = pdd->dev;
|
|
struct qcm_process_device *qpd = &pdd->qpd;
|
|
|
|
if (!dev->cwsr_enabled || qpd->cwsr_kaddr || qpd->cwsr_base)
|
|
continue;
|
|
|
|
offset = KFD_MMAP_TYPE_RESERVED_MEM | KFD_MMAP_GPU_ID(dev->id);
|
|
qpd->tba_addr = (int64_t)vm_mmap(filep, 0,
|
|
KFD_CWSR_TBA_TMA_SIZE, PROT_READ | PROT_EXEC,
|
|
MAP_SHARED, offset);
|
|
|
|
if (IS_ERR_VALUE(qpd->tba_addr)) {
|
|
int err = qpd->tba_addr;
|
|
|
|
pr_err("Failure to set tba address. error %d.\n", err);
|
|
qpd->tba_addr = 0;
|
|
qpd->cwsr_kaddr = NULL;
|
|
return err;
|
|
}
|
|
|
|
memcpy(qpd->cwsr_kaddr, dev->cwsr_isa, dev->cwsr_isa_size);
|
|
|
|
qpd->tma_addr = qpd->tba_addr + KFD_CWSR_TMA_OFFSET;
|
|
pr_debug("set tba :0x%llx, tma:0x%llx, cwsr_kaddr:%p for pqm.\n",
|
|
qpd->tba_addr, qpd->tma_addr, qpd->cwsr_kaddr);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kfd_process_device_init_cwsr_dgpu(struct kfd_process_device *pdd)
|
|
{
|
|
struct kfd_dev *dev = pdd->dev;
|
|
struct qcm_process_device *qpd = &pdd->qpd;
|
|
uint32_t flags = ALLOC_MEM_FLAGS_GTT |
|
|
ALLOC_MEM_FLAGS_NO_SUBSTITUTE | ALLOC_MEM_FLAGS_EXECUTABLE;
|
|
void *kaddr;
|
|
int ret;
|
|
|
|
if (!dev->cwsr_enabled || qpd->cwsr_kaddr || !qpd->cwsr_base)
|
|
return 0;
|
|
|
|
/* cwsr_base is only set for dGPU */
|
|
ret = kfd_process_alloc_gpuvm(pdd, qpd->cwsr_base,
|
|
KFD_CWSR_TBA_TMA_SIZE, flags, &kaddr);
|
|
if (ret)
|
|
return ret;
|
|
|
|
qpd->cwsr_kaddr = kaddr;
|
|
qpd->tba_addr = qpd->cwsr_base;
|
|
|
|
memcpy(qpd->cwsr_kaddr, dev->cwsr_isa, dev->cwsr_isa_size);
|
|
|
|
qpd->tma_addr = qpd->tba_addr + KFD_CWSR_TMA_OFFSET;
|
|
pr_debug("set tba :0x%llx, tma:0x%llx, cwsr_kaddr:%p for pqm.\n",
|
|
qpd->tba_addr, qpd->tma_addr, qpd->cwsr_kaddr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* On return the kfd_process is fully operational and will be freed when the
|
|
* mm is released
|
|
*/
|
|
static struct kfd_process *create_process(const struct task_struct *thread)
|
|
{
|
|
struct kfd_process *process;
|
|
int err = -ENOMEM;
|
|
|
|
process = kzalloc(sizeof(*process), GFP_KERNEL);
|
|
if (!process)
|
|
goto err_alloc_process;
|
|
|
|
kref_init(&process->ref);
|
|
mutex_init(&process->mutex);
|
|
process->mm = thread->mm;
|
|
process->lead_thread = thread->group_leader;
|
|
INIT_LIST_HEAD(&process->per_device_data);
|
|
INIT_DELAYED_WORK(&process->eviction_work, evict_process_worker);
|
|
INIT_DELAYED_WORK(&process->restore_work, restore_process_worker);
|
|
process->last_restore_timestamp = get_jiffies_64();
|
|
kfd_event_init_process(process);
|
|
process->is_32bit_user_mode = in_compat_syscall();
|
|
|
|
process->pasid = kfd_pasid_alloc();
|
|
if (process->pasid == 0)
|
|
goto err_alloc_pasid;
|
|
|
|
if (kfd_alloc_process_doorbells(process) < 0)
|
|
goto err_alloc_doorbells;
|
|
|
|
err = pqm_init(&process->pqm, process);
|
|
if (err != 0)
|
|
goto err_process_pqm_init;
|
|
|
|
/* init process apertures*/
|
|
err = kfd_init_apertures(process);
|
|
if (err != 0)
|
|
goto err_init_apertures;
|
|
|
|
/* Must be last, have to use release destruction after this */
|
|
process->mmu_notifier.ops = &kfd_process_mmu_notifier_ops;
|
|
err = mmu_notifier_register(&process->mmu_notifier, process->mm);
|
|
if (err)
|
|
goto err_register_notifier;
|
|
|
|
get_task_struct(process->lead_thread);
|
|
hash_add_rcu(kfd_processes_table, &process->kfd_processes,
|
|
(uintptr_t)process->mm);
|
|
|
|
return process;
|
|
|
|
err_register_notifier:
|
|
kfd_process_free_outstanding_kfd_bos(process);
|
|
kfd_process_destroy_pdds(process);
|
|
err_init_apertures:
|
|
pqm_uninit(&process->pqm);
|
|
err_process_pqm_init:
|
|
kfd_free_process_doorbells(process);
|
|
err_alloc_doorbells:
|
|
kfd_pasid_free(process->pasid);
|
|
err_alloc_pasid:
|
|
mutex_destroy(&process->mutex);
|
|
kfree(process);
|
|
err_alloc_process:
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
static int init_doorbell_bitmap(struct qcm_process_device *qpd,
|
|
struct kfd_dev *dev)
|
|
{
|
|
unsigned int i;
|
|
int range_start = dev->shared_resources.non_cp_doorbells_start;
|
|
int range_end = dev->shared_resources.non_cp_doorbells_end;
|
|
|
|
if (!KFD_IS_SOC15(dev->device_info->asic_family))
|
|
return 0;
|
|
|
|
qpd->doorbell_bitmap =
|
|
kzalloc(DIV_ROUND_UP(KFD_MAX_NUM_OF_QUEUES_PER_PROCESS,
|
|
BITS_PER_BYTE), GFP_KERNEL);
|
|
if (!qpd->doorbell_bitmap)
|
|
return -ENOMEM;
|
|
|
|
/* Mask out doorbells reserved for SDMA, IH, and VCN on SOC15. */
|
|
pr_debug("reserved doorbell 0x%03x - 0x%03x\n", range_start, range_end);
|
|
pr_debug("reserved doorbell 0x%03x - 0x%03x\n",
|
|
range_start + KFD_QUEUE_DOORBELL_MIRROR_OFFSET,
|
|
range_end + KFD_QUEUE_DOORBELL_MIRROR_OFFSET);
|
|
|
|
for (i = 0; i < KFD_MAX_NUM_OF_QUEUES_PER_PROCESS / 2; i++) {
|
|
if (i >= range_start && i <= range_end) {
|
|
set_bit(i, qpd->doorbell_bitmap);
|
|
set_bit(i + KFD_QUEUE_DOORBELL_MIRROR_OFFSET,
|
|
qpd->doorbell_bitmap);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct kfd_process_device *kfd_get_process_device_data(struct kfd_dev *dev,
|
|
struct kfd_process *p)
|
|
{
|
|
struct kfd_process_device *pdd = NULL;
|
|
|
|
list_for_each_entry(pdd, &p->per_device_data, per_device_list)
|
|
if (pdd->dev == dev)
|
|
return pdd;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
struct kfd_process_device *kfd_create_process_device_data(struct kfd_dev *dev,
|
|
struct kfd_process *p)
|
|
{
|
|
struct kfd_process_device *pdd = NULL;
|
|
|
|
pdd = kzalloc(sizeof(*pdd), GFP_KERNEL);
|
|
if (!pdd)
|
|
return NULL;
|
|
|
|
if (init_doorbell_bitmap(&pdd->qpd, dev)) {
|
|
pr_err("Failed to init doorbell for process\n");
|
|
kfree(pdd);
|
|
return NULL;
|
|
}
|
|
|
|
pdd->dev = dev;
|
|
INIT_LIST_HEAD(&pdd->qpd.queues_list);
|
|
INIT_LIST_HEAD(&pdd->qpd.priv_queue_list);
|
|
pdd->qpd.dqm = dev->dqm;
|
|
pdd->qpd.pqm = &p->pqm;
|
|
pdd->qpd.evicted = 0;
|
|
pdd->process = p;
|
|
pdd->bound = PDD_UNBOUND;
|
|
pdd->already_dequeued = false;
|
|
list_add(&pdd->per_device_list, &p->per_device_data);
|
|
|
|
/* Init idr used for memory handle translation */
|
|
idr_init(&pdd->alloc_idr);
|
|
|
|
return pdd;
|
|
}
|
|
|
|
/**
|
|
* kfd_process_device_init_vm - Initialize a VM for a process-device
|
|
*
|
|
* @pdd: The process-device
|
|
* @drm_file: Optional pointer to a DRM file descriptor
|
|
*
|
|
* If @drm_file is specified, it will be used to acquire the VM from
|
|
* that file descriptor. If successful, the @pdd takes ownership of
|
|
* the file descriptor.
|
|
*
|
|
* If @drm_file is NULL, a new VM is created.
|
|
*
|
|
* Returns 0 on success, -errno on failure.
|
|
*/
|
|
int kfd_process_device_init_vm(struct kfd_process_device *pdd,
|
|
struct file *drm_file)
|
|
{
|
|
struct kfd_process *p;
|
|
struct kfd_dev *dev;
|
|
int ret;
|
|
|
|
if (pdd->vm)
|
|
return drm_file ? -EBUSY : 0;
|
|
|
|
p = pdd->process;
|
|
dev = pdd->dev;
|
|
|
|
if (drm_file)
|
|
ret = amdgpu_amdkfd_gpuvm_acquire_process_vm(
|
|
dev->kgd, drm_file, p->pasid,
|
|
&pdd->vm, &p->kgd_process_info, &p->ef);
|
|
else
|
|
ret = amdgpu_amdkfd_gpuvm_create_process_vm(dev->kgd, p->pasid,
|
|
&pdd->vm, &p->kgd_process_info, &p->ef);
|
|
if (ret) {
|
|
pr_err("Failed to create process VM object\n");
|
|
return ret;
|
|
}
|
|
|
|
amdgpu_vm_set_task_info(pdd->vm);
|
|
|
|
ret = kfd_process_device_reserve_ib_mem(pdd);
|
|
if (ret)
|
|
goto err_reserve_ib_mem;
|
|
ret = kfd_process_device_init_cwsr_dgpu(pdd);
|
|
if (ret)
|
|
goto err_init_cwsr;
|
|
|
|
pdd->drm_file = drm_file;
|
|
|
|
return 0;
|
|
|
|
err_init_cwsr:
|
|
err_reserve_ib_mem:
|
|
kfd_process_device_free_bos(pdd);
|
|
if (!drm_file)
|
|
amdgpu_amdkfd_gpuvm_destroy_process_vm(dev->kgd, pdd->vm);
|
|
pdd->vm = NULL;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Direct the IOMMU to bind the process (specifically the pasid->mm)
|
|
* to the device.
|
|
* Unbinding occurs when the process dies or the device is removed.
|
|
*
|
|
* Assumes that the process lock is held.
|
|
*/
|
|
struct kfd_process_device *kfd_bind_process_to_device(struct kfd_dev *dev,
|
|
struct kfd_process *p)
|
|
{
|
|
struct kfd_process_device *pdd;
|
|
int err;
|
|
|
|
pdd = kfd_get_process_device_data(dev, p);
|
|
if (!pdd) {
|
|
pr_err("Process device data doesn't exist\n");
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
err = kfd_iommu_bind_process_to_device(pdd);
|
|
if (err)
|
|
return ERR_PTR(err);
|
|
|
|
err = kfd_process_device_init_vm(pdd, NULL);
|
|
if (err)
|
|
return ERR_PTR(err);
|
|
|
|
return pdd;
|
|
}
|
|
|
|
struct kfd_process_device *kfd_get_first_process_device_data(
|
|
struct kfd_process *p)
|
|
{
|
|
return list_first_entry(&p->per_device_data,
|
|
struct kfd_process_device,
|
|
per_device_list);
|
|
}
|
|
|
|
struct kfd_process_device *kfd_get_next_process_device_data(
|
|
struct kfd_process *p,
|
|
struct kfd_process_device *pdd)
|
|
{
|
|
if (list_is_last(&pdd->per_device_list, &p->per_device_data))
|
|
return NULL;
|
|
return list_next_entry(pdd, per_device_list);
|
|
}
|
|
|
|
bool kfd_has_process_device_data(struct kfd_process *p)
|
|
{
|
|
return !(list_empty(&p->per_device_data));
|
|
}
|
|
|
|
/* Create specific handle mapped to mem from process local memory idr
|
|
* Assumes that the process lock is held.
|
|
*/
|
|
int kfd_process_device_create_obj_handle(struct kfd_process_device *pdd,
|
|
void *mem)
|
|
{
|
|
return idr_alloc(&pdd->alloc_idr, mem, 0, 0, GFP_KERNEL);
|
|
}
|
|
|
|
/* Translate specific handle from process local memory idr
|
|
* Assumes that the process lock is held.
|
|
*/
|
|
void *kfd_process_device_translate_handle(struct kfd_process_device *pdd,
|
|
int handle)
|
|
{
|
|
if (handle < 0)
|
|
return NULL;
|
|
|
|
return idr_find(&pdd->alloc_idr, handle);
|
|
}
|
|
|
|
/* Remove specific handle from process local memory idr
|
|
* Assumes that the process lock is held.
|
|
*/
|
|
void kfd_process_device_remove_obj_handle(struct kfd_process_device *pdd,
|
|
int handle)
|
|
{
|
|
if (handle >= 0)
|
|
idr_remove(&pdd->alloc_idr, handle);
|
|
}
|
|
|
|
/* This increments the process->ref counter. */
|
|
struct kfd_process *kfd_lookup_process_by_pasid(unsigned int pasid)
|
|
{
|
|
struct kfd_process *p, *ret_p = NULL;
|
|
unsigned int temp;
|
|
|
|
int idx = srcu_read_lock(&kfd_processes_srcu);
|
|
|
|
hash_for_each_rcu(kfd_processes_table, temp, p, kfd_processes) {
|
|
if (p->pasid == pasid) {
|
|
kref_get(&p->ref);
|
|
ret_p = p;
|
|
break;
|
|
}
|
|
}
|
|
|
|
srcu_read_unlock(&kfd_processes_srcu, idx);
|
|
|
|
return ret_p;
|
|
}
|
|
|
|
/* This increments the process->ref counter. */
|
|
struct kfd_process *kfd_lookup_process_by_mm(const struct mm_struct *mm)
|
|
{
|
|
struct kfd_process *p;
|
|
|
|
int idx = srcu_read_lock(&kfd_processes_srcu);
|
|
|
|
p = find_process_by_mm(mm);
|
|
if (p)
|
|
kref_get(&p->ref);
|
|
|
|
srcu_read_unlock(&kfd_processes_srcu, idx);
|
|
|
|
return p;
|
|
}
|
|
|
|
/* process_evict_queues - Evict all user queues of a process
|
|
*
|
|
* Eviction is reference-counted per process-device. This means multiple
|
|
* evictions from different sources can be nested safely.
|
|
*/
|
|
int kfd_process_evict_queues(struct kfd_process *p)
|
|
{
|
|
struct kfd_process_device *pdd;
|
|
int r = 0;
|
|
unsigned int n_evicted = 0;
|
|
|
|
list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
|
|
r = pdd->dev->dqm->ops.evict_process_queues(pdd->dev->dqm,
|
|
&pdd->qpd);
|
|
if (r) {
|
|
pr_err("Failed to evict process queues\n");
|
|
goto fail;
|
|
}
|
|
n_evicted++;
|
|
}
|
|
|
|
return r;
|
|
|
|
fail:
|
|
/* To keep state consistent, roll back partial eviction by
|
|
* restoring queues
|
|
*/
|
|
list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
|
|
if (n_evicted == 0)
|
|
break;
|
|
if (pdd->dev->dqm->ops.restore_process_queues(pdd->dev->dqm,
|
|
&pdd->qpd))
|
|
pr_err("Failed to restore queues\n");
|
|
|
|
n_evicted--;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
/* process_restore_queues - Restore all user queues of a process */
|
|
int kfd_process_restore_queues(struct kfd_process *p)
|
|
{
|
|
struct kfd_process_device *pdd;
|
|
int r, ret = 0;
|
|
|
|
list_for_each_entry(pdd, &p->per_device_data, per_device_list) {
|
|
r = pdd->dev->dqm->ops.restore_process_queues(pdd->dev->dqm,
|
|
&pdd->qpd);
|
|
if (r) {
|
|
pr_err("Failed to restore process queues\n");
|
|
if (!ret)
|
|
ret = r;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void evict_process_worker(struct work_struct *work)
|
|
{
|
|
int ret;
|
|
struct kfd_process *p;
|
|
struct delayed_work *dwork;
|
|
|
|
dwork = to_delayed_work(work);
|
|
|
|
/* Process termination destroys this worker thread. So during the
|
|
* lifetime of this thread, kfd_process p will be valid
|
|
*/
|
|
p = container_of(dwork, struct kfd_process, eviction_work);
|
|
WARN_ONCE(p->last_eviction_seqno != p->ef->seqno,
|
|
"Eviction fence mismatch\n");
|
|
|
|
/* Narrow window of overlap between restore and evict work
|
|
* item is possible. Once amdgpu_amdkfd_gpuvm_restore_process_bos
|
|
* unreserves KFD BOs, it is possible to evicted again. But
|
|
* restore has few more steps of finish. So lets wait for any
|
|
* previous restore work to complete
|
|
*/
|
|
flush_delayed_work(&p->restore_work);
|
|
|
|
pr_debug("Started evicting pasid 0x%x\n", p->pasid);
|
|
ret = kfd_process_evict_queues(p);
|
|
if (!ret) {
|
|
dma_fence_signal(p->ef);
|
|
dma_fence_put(p->ef);
|
|
p->ef = NULL;
|
|
queue_delayed_work(kfd_restore_wq, &p->restore_work,
|
|
msecs_to_jiffies(PROCESS_RESTORE_TIME_MS));
|
|
|
|
pr_debug("Finished evicting pasid 0x%x\n", p->pasid);
|
|
} else
|
|
pr_err("Failed to evict queues of pasid 0x%x\n", p->pasid);
|
|
}
|
|
|
|
static void restore_process_worker(struct work_struct *work)
|
|
{
|
|
struct delayed_work *dwork;
|
|
struct kfd_process *p;
|
|
int ret = 0;
|
|
|
|
dwork = to_delayed_work(work);
|
|
|
|
/* Process termination destroys this worker thread. So during the
|
|
* lifetime of this thread, kfd_process p will be valid
|
|
*/
|
|
p = container_of(dwork, struct kfd_process, restore_work);
|
|
pr_debug("Started restoring pasid 0x%x\n", p->pasid);
|
|
|
|
/* Setting last_restore_timestamp before successful restoration.
|
|
* Otherwise this would have to be set by KGD (restore_process_bos)
|
|
* before KFD BOs are unreserved. If not, the process can be evicted
|
|
* again before the timestamp is set.
|
|
* If restore fails, the timestamp will be set again in the next
|
|
* attempt. This would mean that the minimum GPU quanta would be
|
|
* PROCESS_ACTIVE_TIME_MS - (time to execute the following two
|
|
* functions)
|
|
*/
|
|
|
|
p->last_restore_timestamp = get_jiffies_64();
|
|
ret = amdgpu_amdkfd_gpuvm_restore_process_bos(p->kgd_process_info,
|
|
&p->ef);
|
|
if (ret) {
|
|
pr_debug("Failed to restore BOs of pasid 0x%x, retry after %d ms\n",
|
|
p->pasid, PROCESS_BACK_OFF_TIME_MS);
|
|
ret = queue_delayed_work(kfd_restore_wq, &p->restore_work,
|
|
msecs_to_jiffies(PROCESS_BACK_OFF_TIME_MS));
|
|
WARN(!ret, "reschedule restore work failed\n");
|
|
return;
|
|
}
|
|
|
|
ret = kfd_process_restore_queues(p);
|
|
if (!ret)
|
|
pr_debug("Finished restoring pasid 0x%x\n", p->pasid);
|
|
else
|
|
pr_err("Failed to restore queues of pasid 0x%x\n", p->pasid);
|
|
}
|
|
|
|
void kfd_suspend_all_processes(void)
|
|
{
|
|
struct kfd_process *p;
|
|
unsigned int temp;
|
|
int idx = srcu_read_lock(&kfd_processes_srcu);
|
|
|
|
hash_for_each_rcu(kfd_processes_table, temp, p, kfd_processes) {
|
|
cancel_delayed_work_sync(&p->eviction_work);
|
|
cancel_delayed_work_sync(&p->restore_work);
|
|
|
|
if (kfd_process_evict_queues(p))
|
|
pr_err("Failed to suspend process 0x%x\n", p->pasid);
|
|
dma_fence_signal(p->ef);
|
|
dma_fence_put(p->ef);
|
|
p->ef = NULL;
|
|
}
|
|
srcu_read_unlock(&kfd_processes_srcu, idx);
|
|
}
|
|
|
|
int kfd_resume_all_processes(void)
|
|
{
|
|
struct kfd_process *p;
|
|
unsigned int temp;
|
|
int ret = 0, idx = srcu_read_lock(&kfd_processes_srcu);
|
|
|
|
hash_for_each_rcu(kfd_processes_table, temp, p, kfd_processes) {
|
|
if (!queue_delayed_work(kfd_restore_wq, &p->restore_work, 0)) {
|
|
pr_err("Restore process %d failed during resume\n",
|
|
p->pasid);
|
|
ret = -EFAULT;
|
|
}
|
|
}
|
|
srcu_read_unlock(&kfd_processes_srcu, idx);
|
|
return ret;
|
|
}
|
|
|
|
int kfd_reserved_mem_mmap(struct kfd_dev *dev, struct kfd_process *process,
|
|
struct vm_area_struct *vma)
|
|
{
|
|
struct kfd_process_device *pdd;
|
|
struct qcm_process_device *qpd;
|
|
|
|
if ((vma->vm_end - vma->vm_start) != KFD_CWSR_TBA_TMA_SIZE) {
|
|
pr_err("Incorrect CWSR mapping size.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pdd = kfd_get_process_device_data(dev, process);
|
|
if (!pdd)
|
|
return -EINVAL;
|
|
qpd = &pdd->qpd;
|
|
|
|
qpd->cwsr_kaddr = (void *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
|
|
get_order(KFD_CWSR_TBA_TMA_SIZE));
|
|
if (!qpd->cwsr_kaddr) {
|
|
pr_err("Error allocating per process CWSR buffer.\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
vma->vm_flags |= VM_IO | VM_DONTCOPY | VM_DONTEXPAND
|
|
| VM_NORESERVE | VM_DONTDUMP | VM_PFNMAP;
|
|
/* Mapping pages to user process */
|
|
return remap_pfn_range(vma, vma->vm_start,
|
|
PFN_DOWN(__pa(qpd->cwsr_kaddr)),
|
|
KFD_CWSR_TBA_TMA_SIZE, vma->vm_page_prot);
|
|
}
|
|
|
|
void kfd_flush_tlb(struct kfd_process_device *pdd)
|
|
{
|
|
struct kfd_dev *dev = pdd->dev;
|
|
const struct kfd2kgd_calls *f2g = dev->kfd2kgd;
|
|
|
|
if (dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) {
|
|
/* Nothing to flush until a VMID is assigned, which
|
|
* only happens when the first queue is created.
|
|
*/
|
|
if (pdd->qpd.vmid)
|
|
f2g->invalidate_tlbs_vmid(dev->kgd, pdd->qpd.vmid);
|
|
} else {
|
|
f2g->invalidate_tlbs(dev->kgd, pdd->process->pasid);
|
|
}
|
|
}
|
|
|
|
#if defined(CONFIG_DEBUG_FS)
|
|
|
|
int kfd_debugfs_mqds_by_process(struct seq_file *m, void *data)
|
|
{
|
|
struct kfd_process *p;
|
|
unsigned int temp;
|
|
int r = 0;
|
|
|
|
int idx = srcu_read_lock(&kfd_processes_srcu);
|
|
|
|
hash_for_each_rcu(kfd_processes_table, temp, p, kfd_processes) {
|
|
seq_printf(m, "Process %d PASID 0x%x:\n",
|
|
p->lead_thread->tgid, p->pasid);
|
|
|
|
mutex_lock(&p->mutex);
|
|
r = pqm_debugfs_mqds(m, &p->pqm);
|
|
mutex_unlock(&p->mutex);
|
|
|
|
if (r)
|
|
break;
|
|
}
|
|
|
|
srcu_read_unlock(&kfd_processes_srcu, idx);
|
|
|
|
return r;
|
|
}
|
|
|
|
#endif
|
|
|