kernel/drivers/gpu/drm/amd/amdkfd/kfd_device.c, branch linux-4.16.y

drm/amdkfd: map multiple processes to HW scheduler

2017-11-27T23:29:45Z

Allow HWS to to execute multiple processes on the hardware concurrently. The number of concurrent processes is limited by the number of VMIDs allocated to the HWS. A module parameter can be used for limiting this further or turn it off altogether (mainly for debugging purposes). Signed-off-by: Yong Zhao Signed-off-by: Jay Cornwall Signed-off-by: Felix Kuehling Acked-by: Oded Gabbay Signed-off-by: Oded Gabbay

drm/amdkfd: Add CWSR support

2017-11-14T21:41:19Z

This hardware feature allows the GPU to preempt shader execution in the middle of a compute wave, save the state and restore it later to resume execution. Memory for saving the state is allocated per queue in user mode and the address and size passed to the create_queue ioctl. The size depends on the number of waves that can be in flight simultaneously on a given ASIC. Signed-off-by: Shaoyun.liu Signed-off-by: Yong Zhao Signed-off-by: Felix Kuehling Signed-off-by: Oded Gabbay

drm/amdkfd: use a high priority workqueue for IH work

2017-10-27T23:35:34Z

In systems under heavy load the IH work may experience significant scheduling delays. Under load + system workqueue: Max Latency: 7.023695 ms Avg Latency: 0.263994 ms Under load + high priority workqueue: Max Latency: 1.162568 ms Avg Latency: 0.163213 ms Further work is required to measure the impact of per-cpu settings on IH performance. Signed-off-by: Andres Rodriguez Signed-off-by: Felix Kuehling Acked-by: Oded Gabbay Signed-off-by: Oded Gabbay

drm/amdkfd: Use VMID bitmap from KGD v2

2017-09-20T22:10:18Z

The hard-coded values related to VMID were removed in KFD, as those values can be calculated in the KFD initialization function. v2: remove unnecessary local variable Signed-off-by: Yong Zhao Signed-off-by: Felix Kuehling Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay

drm/amdkfd: Fix suspend/resume issue on Carrizo v2

2017-09-20T22:10:14Z

When we do suspend/resume through "sudo pm-suspend" while there is HSA activity running, upon resume we will encounter HWS hanging, which is caused by memory read/write failures. The root cause is that when suspend, we neglected to unbind pasid from kfd device. Another major change is that the bind/unbinding is changed to be performed on a per process basis, instead of whether there are queues in dqm. v2: - free IOMMU device if kfd_bind_processes_to_device fails in kfd_resume - add comments to kfd_bind/unbind_processes_to/from_device - minor cleanups Signed-off-by: Yong Zhao Signed-off-by: Felix Kuehling Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay

drm/amdkfd: Reorganize kfd resume code

2017-09-20T22:10:13Z

The idea is to let kfd init and resume function share the same code path as much as possible, rather than to have two copies of almost identical code. That way improves the code readability and maintainability. Signed-off-by: Yong Zhao Signed-off-by: Felix Kuehling Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay

drm/amdkfd: Separate doorbell allocation from PASID

2017-09-26T17:07:03Z

PASID management is moving into KGD. Limiting the PASID range to the number of doorbell pages is no longer practical. Signed-off-by: Felix Kuehling Acked-by: Alex Deucher Reviewed-by: Oded Gabbay Signed-off-by: Alex Deucher

drm/amdkfd: Update PM4 packet headers

2017-08-16T03:00:15Z

To match current firmware. The map process packet has been extended to support scratch. This is a non-backwards compatible change and it's about two years old. So no point keeping the old version around conditionally. Signed-off-by: Felix Kuehling Reviewed-by: Oded Gabbay Signed-off-by: Oded Gabbay

drm/amdkfd: Add more error printing to help bringup v2

2017-08-16T03:00:13Z

v2: Turned WARN into dev_warn and made the message more helpful Signed-off-by: Yong Zhao Signed-off-by: Felix Kuehling Signed-off-by: Oded Gabbay

drm/amdkfd: Handle remaining BUG_ONs more gracefully v2

2017-08-16T03:00:12Z

In most cases, BUG_ONs can be replaced with WARN_ON with an error return. In some void functions just turn them into a WARN_ON and possibly an early exit. v2: * Cleaned up error handling in pm_send_unmap_queue * Removed redundant WARN_ON in kfd_process_destroy_delayed Signed-off-by: Felix Kuehling Signed-off-by: Oded Gabbay