diff options
| author | Alex Sierra <alex.sierra@amd.com> | 2020-05-28 18:27:05 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-04-20 21:47:48 -0400 |
| commit | 0f7b5c44d4c53710993e4773bd6eaf171f1888e6 (patch) | |
| tree | da65e40ffefb57dc0e382354301361775a517f0e /drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | |
| parent | 063e33c5469cf5f46407701f1121a978a3af2ce8 (diff) | |
drm/amdkfd: add ioctl to configure and query xnack retries
Xnack retries are used for page fault recovery. Some AMD chip
families support continuously retry while page table entries are invalid.
The driver must handle the page fault interrupt and fill in a valid entry
for the GPU to continue.
This ioctl allows to enable/disable XNACK retries per KFD process.
Signed-off-by: Alex Sierra <alex.sierra@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_chardev.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c index c31ce8c88df4..913cc29d8857 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c @@ -1745,6 +1745,31 @@ static int kfd_ioctl_smi_events(struct file *filep, return kfd_smi_event_open(dev, &args->anon_fd); } +static int kfd_ioctl_set_xnack_mode(struct file *filep, + struct kfd_process *p, void *data) +{ + struct kfd_ioctl_set_xnack_mode_args *args = data; + int r = 0; + + mutex_lock(&p->mutex); + if (args->xnack_enabled >= 0) { + if (!list_empty(&p->pqm.queues)) { + pr_debug("Process has user queues running\n"); + mutex_unlock(&p->mutex); + return -EBUSY; + } + if (args->xnack_enabled && !kfd_process_xnack_mode(p, true)) + r = -EPERM; + else + p->xnack_enabled = args->xnack_enabled; + } else { + args->xnack_enabled = p->xnack_enabled; + } + mutex_unlock(&p->mutex); + + return r; +} + static int kfd_ioctl_svm(struct file *filep, struct kfd_process *p, void *data) { struct kfd_ioctl_svm_args *args = data; @@ -1871,6 +1896,9 @@ static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = { kfd_ioctl_smi_events, 0), AMDKFD_IOCTL_DEF(AMDKFD_IOC_SVM, kfd_ioctl_svm, 0), + + AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_XNACK_MODE, + kfd_ioctl_set_xnack_mode, 0), }; #define AMDKFD_CORE_IOCTL_COUNT ARRAY_SIZE(amdkfd_ioctls) |