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| author | Oded Gabbay <oded.gabbay@amd.com> | 2015-02-17 11:58:27 +0200 |
|---|---|---|
| committer | Oded Gabbay <oded.gabbay@amd.com> | 2015-02-23 10:47:56 +0200 |
| commit | 1365aa6266fad0669487240af3f098593796172c (patch) | |
| tree | 5aec9b1e27fb9f362b6aeded3aaaaee17e097f85 /drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h | |
| parent | c517d838eb7d07bbe9507871fab3931deccff539 (diff) | |
| download | op-kernel-dev-1365aa6266fad0669487240af3f098593796172c.zip op-kernel-dev-1365aa6266fad0669487240af3f098593796172c.tar.gz | |
drm/amdkfd: Initialize only amdkfd's assigned pipelines
This patch fixes a bug in the initialization of the pipelines. The
init_pipelines() function was called with a constant value of 0 in the
first_pipe argument. This is an error because amdkfd doesn't handle pipe 0.
The correct way is to pass the value that get_first_pipe() returns as the
argument for first_pipe.
This bug appeared in 3.19 (first version with amdkfd) and it causes around 15%
drop in CPU performance of Kaveri (A10-7850).
v2: Don't set get_first_pipe() as inline because it calls BUG_ON()
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
Cc: stable@vger.kernel.org
Tested-by: Michel Dänzer <michel.daenzer@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h')
| -rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h index d64f86c..386bd7d 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h @@ -163,6 +163,7 @@ void program_sh_mem_settings(struct device_queue_manager *dqm, struct qcm_process_device *qpd); int init_pipelines(struct device_queue_manager *dqm, unsigned int pipes_num, unsigned int first_pipe); +unsigned int get_first_pipe(struct device_queue_manager *dqm); extern inline unsigned int get_sh_mem_bases_32(struct kfd_process_device *pdd) { |
