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drm/amdkfd: prepare map process for single process debug devices

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Older HW only supports debugging on a single process because the
SPI debug mode setting registers are device global.

The HWS has supplied a single pinned VMID (0xf) for MAP_PROCESS
for debug purposes. To pin the VMID, the KFD will remove the VMID from
the HWS dynamic VMID allocation via SET_RESOUCES so that a debugged
process will never migrate away from its pinned VMID.

The KFD is responsible for reserving and releasing this pinned VMID
accordingly whenever the debugger attaches and detaches respectively.

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
2022-04-04 12:27:43 -04:00
committed by Alex Deucher
parent 7cee6a6824
commit 97ae3c8cce
4 changed files with 111 additions and 1 deletions
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drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h
+5
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@@ -250,6 +250,7 @@ struct device_queue_manager {
struct kfd_mem_obj *fence_mem;
bool active_runlist;
int sched_policy;
uint32_t trap_debug_vmid;
/* hw exception */
bool is_hws_hang;
@@ -285,6 +286,10 @@ unsigned int get_queues_per_pipe(struct device_queue_manager *dqm);
unsigned int get_pipes_per_mec(struct device_queue_manager *dqm);
unsigned int get_num_sdma_queues(struct device_queue_manager *dqm);
unsigned int get_num_xgmi_sdma_queues(struct device_queue_manager *dqm);
int reserve_debug_trap_vmid(struct device_queue_manager *dqm,
struct qcm_process_device *qpd);
int release_debug_trap_vmid(struct device_queue_manager *dqm,
struct qcm_process_device *qpd);
static inline unsigned int get_sh_mem_bases_32(struct kfd_process_device *pdd)
{