On Thu, Jan 22, 2015 at 5:59 AM, Oded Gabbay <oded.gabbay@xxxxxxx> wrote:
> This patch fixes a bug when calling to init_pipeline() interface.
> The index that was passed to that function didn't take into account the
> first_pipe value, which represents the first pipe index that is under amdkfd's
> responsibility.
>
> Signed-off-by: Oded Gabbay <oded.gabbay@xxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
> ---
> drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> 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 b9626ae..cd0710a 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> @@ -565,10 +565,14 @@ static int init_pipelines(struct device_queue_manager *dqm,
>
> for (i = 0; i < pipes_num; i++) {
> inx = i + first_pipe;
> + /*
> + * HPD buffer on GTT is allocated by amdkfd, no need to waste
> + * space in GTT for pipelines we don't initialize
> + */
> pipe_hpd_addr = dqm->pipelines_addr + i * CIK_HPD_EOP_BYTES;
> pr_debug("kfd: pipeline address %llX\n", pipe_hpd_addr);
> /* = log2(bytes/4)-1 */
> - kfd2kgd->init_pipeline(dqm->dev->kgd, i,
> + kfd2kgd->init_pipeline(dqm->dev->kgd, inx,
> CIK_HPD_EOP_BYTES_LOG2 - 3, pipe_hpd_addr);
> }
>
> --
> 1.9.1
>
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