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drm/amdgpu: add configurable grace period for unmap queues

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The HWS schedule allows a grace period for wave completion prior to
preemption for better performance by avoiding CWSR on waves that can
potentially complete quickly. The debugger, on the other hand, will
want to inspect wave status immediately after it actively triggers
preemption (a suspend function to be provided).

To minimize latency between preemption and debugger wave inspection, allow
immediate preemption by setting the grace period to 0.

Note that setting the preepmtion grace period to 0 will result in an
infinite grace period being set due to a CP FW bug so set it to 1 for now.

Signed-off-by: Jonathan Kim <jonathan.kim@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jonathan Kim
2023-03-23 17:17:20 -04:00
committed by Alex Deucher
parent 33f3437ae1
commit 7cee6a6824
14 changed files with 295 additions and 20 deletions
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3
drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h
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@@ -37,6 +37,7 @@
#define KFD_MES_PROCESS_QUANTUM 100000
#define KFD_MES_GANG_QUANTUM 10000
#define USE_DEFAULT_GRACE_PERIOD 0xffffffff
struct device_process_node {
struct qcm_process_device *qpd;
@@ -259,6 +260,8 @@ struct device_queue_manager {
/* used for GFX 9.4.3 only */
uint32_t current_logical_xcc_start;
uint32_t wait_times;
};
void device_queue_manager_init_cik(