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drm/amdgpu: added AMD GPU instance counting V2

Browse source 
Count all GPU instances from AMD(including iGPUs and
dGPUs) in the system.

V2: drop unnecessary initialization for other gpu_info
    members except mutex

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Evan Quan 2018-09-27 13:26:58 +08:00 • committed by Alex Deucher
parent e92b83e508
commit 62d73fbcfb
3 changed files with 73 additions and 0 deletions
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18
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View file

@ -81,6 +81,23 @@
#include "amdgpu_bo_list.h"
#include "amdgpu_gem.h"
#define MAX_GPU_INSTANCE 16
struct amdgpu_gpu_instance
{
struct amdgpu_device *adev;
int mgpu_fan_enabled;
};
struct amdgpu_mgpu_info
{
struct amdgpu_gpu_instance gpu_ins[MAX_GPU_INSTANCE];
struct mutex mutex;
uint32_t num_gpu;
uint32_t num_dgpu;
uint32_t num_apu;
};
/*
* Modules parameters.
*/
@ -134,6 +151,7 @@ extern int amdgpu_compute_multipipe;
extern int amdgpu_gpu_recovery;
extern int amdgpu_emu_mode;
extern uint amdgpu_smu_memory_pool_size;
extern struct amdgpu_mgpu_info mgpu_info;
#ifdef CONFIG_DRM_AMDGPU_SI
extern int amdgpu_si_support;

3
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
View file

@ -127,6 +127,9 @@ int amdgpu_compute_multipipe = -1;
int amdgpu_gpu_recovery = -1; /* auto */
int amdgpu_emu_mode = 0;
uint amdgpu_smu_memory_pool_size = 0;
struct amdgpu_mgpu_info mgpu_info = {
.mutex = __MUTEX_INITIALIZER(mgpu_info.mutex),
};
/**
* DOC: vramlimit (int)

52
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
View file

@ -40,6 +40,30 @@
#include "amdgpu_gem.h"
#include "amdgpu_display.h"
static void amdgpu_unregister_gpu_instance(struct amdgpu_device *adev)
{
struct amdgpu_gpu_instance *gpu_instance;
int i;
mutex_lock(&mgpu_info.mutex);
for (i = 0; i < mgpu_info.num_gpu; i++) {
gpu_instance = &(mgpu_info.gpu_ins[i]);
if (gpu_instance->adev == adev) {
mgpu_info.gpu_ins[i] =
mgpu_info.gpu_ins[mgpu_info.num_gpu - 1];
mgpu_info.num_gpu--;
if (adev->flags & AMD_IS_APU)
mgpu_info.num_apu--;
else
mgpu_info.num_dgpu--;
break;
}
}
mutex_unlock(&mgpu_info.mutex);
}
/**
* amdgpu_driver_unload_kms - Main unload function for KMS.
*
@ -55,6 +79,8 @@ void amdgpu_driver_unload_kms(struct drm_device *dev)
if (adev == NULL)
return;
amdgpu_unregister_gpu_instance(adev);
if (adev->rmmio == NULL)
goto done_free;
@ -75,6 +101,31 @@ done_free:
dev->dev_private = NULL;
}
static void amdgpu_register_gpu_instance(struct amdgpu_device *adev)
{
struct amdgpu_gpu_instance *gpu_instance;
mutex_lock(&mgpu_info.mutex);
if (mgpu_info.num_gpu >= MAX_GPU_INSTANCE) {
DRM_ERROR("Cannot register more gpu instance\n");
mutex_unlock(&mgpu_info.mutex);
return;
}
gpu_instance = &(mgpu_info.gpu_ins[mgpu_info.num_gpu]);
gpu_instance->adev = adev;
gpu_instance->mgpu_fan_enabled = 0;
mgpu_info.num_gpu++;
if (adev->flags & AMD_IS_APU)
mgpu_info.num_apu++;
else
mgpu_info.num_dgpu++;
mutex_unlock(&mgpu_info.mutex);
}
/**
* amdgpu_driver_load_kms - Main load function for KMS.
*
@ -169,6 +220,7 @@ int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags)
pm_runtime_put_autosuspend(dev->dev);
}
amdgpu_register_gpu_instance(adev);
out:
if (r) {
/* balance pm_runtime_get_sync in amdgpu_driver_unload_kms */