[PATCH] drm/amdgpu: XGMI pstate switch initial support
Liu, Shaoyun
Shaoyun.Liu at amd.com
Tue Mar 5 16:25:11 UTC 2019
Driver vote low to high pstate switch whenever there is an outstanding
XGMI mapping request. Driver vote high to low pstate when all the
outstanding XGMI mapping is terminated.
Change-Id: I499fb1c389077632fe9cfce4b6dc9a33deff6875
Signed-off-by: shaoyunl <shaoyun.liu at amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 4 ++++
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 +++
drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 1 +
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 29 ++++++++++++++++++++++++++++-
drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c | 15 +++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h | 2 ++
6 files changed, 53 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index f0dada9..c3c8392 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -930,6 +930,10 @@ struct amdgpu_device {
int asic_reset_res;
struct work_struct xgmi_reset_work;
+
+ /* counter of mapped memory through xgmi */
+ atomic_t xgmi_map_counter;
+
};
static inline struct amdgpu_device *amdgpu_ttm_adev(struct ttm_bo_device *bdev)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 00def57..f28abb3 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -2008,6 +2008,9 @@ static void amdgpu_device_ip_late_init_func_handler(struct work_struct *work)
r = amdgpu_device_enable_mgpu_fan_boost();
if (r)
DRM_ERROR("enable mgpu fan boost failed (%d).\n", r);
+
+ /*set to low pstate by default */
+ amdgpu_xgmi_set_pstate(adev, 0);
}
static void amdgpu_device_delay_enable_gfx_off(struct work_struct *work)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
index 220a6a7..6f176bb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
@@ -54,6 +54,7 @@ struct amdgpu_bo_va_mapping {
uint64_t __subtree_last;
uint64_t offset;
uint64_t flags;
+ bool is_xgmi;
};
/* User space allocated BO in a VM */
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index c0f315b..5765761 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -34,6 +34,7 @@
#include "amdgpu_trace.h"
#include "amdgpu_amdkfd.h"
#include "amdgpu_gmc.h"
+#include "amdgpu_xgmi.h"
/**
* DOC: GPUVM
@@ -2013,8 +2014,9 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev,
struct ttm_mem_reg *mem;
struct drm_mm_node *nodes;
struct dma_fence *exclusive, **last_update;
- uint64_t flags;
struct amdgpu_device *bo_adev = adev;
+ bool is_xgmi = false;
+ uint64_t flags;
int r;
if (clear || !bo) {
@@ -2036,6 +2038,10 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev,
if (bo) {
flags = amdgpu_ttm_tt_pte_flags(adev, bo->tbo.ttm, mem);
bo_adev = amdgpu_ttm_adev(bo->tbo.bdev);
+ if (adev != bo_adev &&
+ adev->gmc.xgmi.hive_id &&
+ adev->gmc.xgmi.hive_id == bo_adev->gmc.xgmi.hive_id)
+ is_xgmi = true;
} else {
flags = 0x0;
}
@@ -2054,6 +2060,19 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev,
}
list_for_each_entry(mapping, &bo_va->invalids, list) {
+ if (mapping->is_xgmi != is_xgmi) {
+ if (is_xgmi) {
+ /* Adding an XGMI mapping to the PT */
+ if (atomic_inc_return(&adev->xgmi_map_counter) == 1)
+ amdgpu_xgmi_set_pstate(adev, 1);
+ } else {
+ /* Removing an XGMI mapping from the PT */
+ if (atomic_dec_return(&adev->xgmi_map_counter) == 0)
+ amdgpu_xgmi_set_pstate(adev, 0);
+ }
+ mapping->is_xgmi = is_xgmi;
+ }
+
r = amdgpu_vm_bo_split_mapping(adev, exclusive, pages_addr, vm,
mapping, flags, bo_adev, nodes,
last_update);
@@ -2271,6 +2290,13 @@ int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
r = amdgpu_vm_bo_update_mapping(adev, NULL, NULL, vm,
mapping->start, mapping->last,
init_pte_value, 0, &f);
+
+ if (mapping->is_xgmi) {
+ /* Removing an XGMI mapping from the PT */
+ if (atomic_dec_return(&adev->xgmi_map_counter) == 0)
+ amdgpu_xgmi_set_pstate(adev, 0);
+ }
+
amdgpu_vm_free_mapping(adev, vm, mapping, f);
if (r) {
dma_fence_put(f);
@@ -2467,6 +2493,7 @@ int amdgpu_vm_bo_map(struct amdgpu_device *adev,
mapping->last = eaddr;
mapping->offset = offset;
mapping->flags = flags;
+ mapping->is_xgmi = false;
amdgpu_vm_bo_insert_map(adev, bo_va, mapping);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
index 407dd16c..cb403cf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.c
@@ -72,6 +72,7 @@ struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev, int lo
mutex_init(&tmp->reset_lock);
if (lock)
mutex_lock(&tmp->hive_lock);
+ tmp->pstate = -1;
mutex_unlock(&xgmi_mutex);
@@ -182,3 +183,17 @@ void amdgpu_xgmi_remove_device(struct amdgpu_device *adev)
mutex_unlock(&hive->hive_lock);
}
}
+
+int amdgpu_xgmi_set_pstate(struct amdgpu_device *adev, int pstate)
+{
+ int ret = 0;
+ struct amdgpu_hive_info *hive = amdgpu_get_xgmi_hive(adev, 0);
+
+ if (!hive)
+ return 0;
+
+ if (hive->pstate == pstate)
+ return 0;
+ /* Todo : sent the message to SMU for pstate change */
+ return ret;
+}
\ No newline at end of file
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
index 14bc606..6859702 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xgmi.h
@@ -31,11 +31,13 @@ struct amdgpu_hive_info {
int number_devices;
struct mutex hive_lock,
reset_lock;
+ int pstate; /*0 -- low , 1 -- high , -1 unknown*/
};
struct amdgpu_hive_info *amdgpu_get_xgmi_hive(struct amdgpu_device *adev, int lock);
int amdgpu_xgmi_update_topology(struct amdgpu_hive_info *hive, struct amdgpu_device *adev);
int amdgpu_xgmi_add_device(struct amdgpu_device *adev);
void amdgpu_xgmi_remove_device(struct amdgpu_device *adev);
+int amdgpu_xgmi_set_pstate(struct amdgpu_device *adev, int pstate);
#endif
--
2.7.4
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