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From 3a4bcdefa362f429f7ee5e3d4fbf50a4ae32d370 Mon Sep 17 00:00:00 2001
From: Evan Quan <evan.quan@amd.com>
Date: Thu, 27 Sep 2018 13:26:58 +0800
Subject: [PATCH 5475/5725] drm/amdgpu: added AMD GPU instance counting V2
Count all GPU instances from AMD(including iGPUs and
dGPUs) in the system.
V2: drop unnecessary initialization for other gpu_info
members except mutex
Change-Id: If62a0873c64857a3fcdf9785557e24cb3456c12e
Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Raveendra Talabattula <raveendra.talabattula@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 18 ++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 3 ++
drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 52 +++++++++++++++++++++++++++++++++
3 files changed, 73 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 7d10f6e..15e12e7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -82,6 +82,23 @@
#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.
*/
@@ -139,6 +156,7 @@ 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;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 626a172..5f59a07 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -133,6 +133,9 @@ 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)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 42b9d30..625eb29 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -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 @@ void amdgpu_driver_unload_kms(struct drm_device *dev)
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.
*
@@ -166,6 +217,7 @@ 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 */
--
2.7.4
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