drm/amdgpu: Add sysfs files for returning VRAM/GTT info v2

Add 6 files that return (in bytes):
The total amount of VRAM/visible VRAM/GTT
and the current total used VRAM/visible VRAM/GTT

v2: Split used and total into separate files

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Kent Russell <kent.russell@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
index da7b1b9..62591d0 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
@@ -36,6 +36,47 @@ struct amdgpu_gtt_node {
        struct ttm_buffer_object *tbo;
 };
 
+/**
+ * DOC: mem_info_gtt_total
+ *
+ * The amdgpu driver provides a sysfs API for reporting current total size of
+ * the GTT.
+ * The file mem_info_gtt_total is used for this, and returns the total size of
+ * the GTT block, in bytes
+ */
+static ssize_t amdgpu_mem_info_gtt_total_show(struct device *dev,
+               struct device_attribute *attr, char *buf)
+{
+       struct drm_device *ddev = dev_get_drvdata(dev);
+       struct amdgpu_device *adev = ddev->dev_private;
+
+       return snprintf(buf, PAGE_SIZE, "%llu\n",
+                       (adev->mman.bdev.man[TTM_PL_TT].size) * PAGE_SIZE);
+}
+
+/**
+ * DOC: mem_info_gtt_used
+ *
+ * The amdgpu driver provides a sysfs API for reporting current total amount of
+ * used GTT.
+ * The file mem_info_gtt_used is used for this, and returns the current used
+ * size of the GTT block, in bytes
+ */
+static ssize_t amdgpu_mem_info_gtt_used_show(struct device *dev,
+               struct device_attribute *attr, char *buf)
+{
+       struct drm_device *ddev = dev_get_drvdata(dev);
+       struct amdgpu_device *adev = ddev->dev_private;
+
+       return snprintf(buf, PAGE_SIZE, "%llu\n",
+                       amdgpu_gtt_mgr_usage(&adev->mman.bdev.man[TTM_PL_TT]));
+}
+
+static DEVICE_ATTR(mem_info_gtt_total, S_IRUGO,
+                  amdgpu_mem_info_gtt_total_show, NULL);
+static DEVICE_ATTR(mem_info_gtt_used, S_IRUGO,
+                  amdgpu_mem_info_gtt_used_show, NULL);
+
 /**
  * amdgpu_gtt_mgr_init - init GTT manager and DRM MM
  *
@@ -50,6 +91,7 @@ static int amdgpu_gtt_mgr_init(struct ttm_mem_type_manager *man,
        struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
        struct amdgpu_gtt_mgr *mgr;
        uint64_t start, size;
+       int ret;
 
        mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
        if (!mgr)
@@ -61,6 +103,18 @@ static int amdgpu_gtt_mgr_init(struct ttm_mem_type_manager *man,
        spin_lock_init(&mgr->lock);
        atomic64_set(&mgr->available, p_size);
        man->priv = mgr;
+
+       ret = device_create_file(adev->dev, &dev_attr_mem_info_gtt_total);
+       if (ret) {
+               DRM_ERROR("Failed to create device file mem_info_gtt_total\n");
+               return ret;
+       }
+       ret = device_create_file(adev->dev, &dev_attr_mem_info_gtt_used);
+       if (ret) {
+               DRM_ERROR("Failed to create device file mem_info_gtt_used\n");
+               return ret;
+       }
+
        return 0;
 }
 
@@ -74,12 +128,17 @@ static int amdgpu_gtt_mgr_init(struct ttm_mem_type_manager *man,
  */
 static int amdgpu_gtt_mgr_fini(struct ttm_mem_type_manager *man)
 {
+       struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
        struct amdgpu_gtt_mgr *mgr = man->priv;
        spin_lock(&mgr->lock);
        drm_mm_takedown(&mgr->mm);
        spin_unlock(&mgr->lock);
        kfree(mgr);
        man->priv = NULL;
+
+       device_remove_file(adev->dev, &dev_attr_mem_info_gtt_total);
+       device_remove_file(adev->dev, &dev_attr_mem_info_gtt_used);
+
        return 0;
 }
 

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 3f9d5d0..ec9ea3f 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -32,6 +32,85 @@ struct amdgpu_vram_mgr {
        atomic64_t vis_usage;
 };
 
+/**
+ * DOC: mem_info_vram_total
+ *
+ * The amdgpu driver provides a sysfs API for reporting current total VRAM
+ * available on the device
+ * The file mem_info_vram_total is used for this and returns the total
+ * amount of VRAM in bytes
+ */
+static ssize_t amdgpu_mem_info_vram_total_show(struct device *dev,
+               struct device_attribute *attr, char *buf)
+{
+       struct drm_device *ddev = dev_get_drvdata(dev);
+       struct amdgpu_device *adev = ddev->dev_private;
+
+       return snprintf(buf, PAGE_SIZE, "%llu\n", adev->gmc.real_vram_size);
+}
+
+/**
+ * DOC: mem_info_vis_vram_total
+ *
+ * The amdgpu driver provides a sysfs API for reporting current total
+ * visible VRAM available on the device
+ * The file mem_info_vis_vram_total is used for this and returns the total
+ * amount of visible VRAM in bytes
+ */
+static ssize_t amdgpu_mem_info_vis_vram_total_show(struct device *dev,
+               struct device_attribute *attr, char *buf)
+{
+       struct drm_device *ddev = dev_get_drvdata(dev);
+       struct amdgpu_device *adev = ddev->dev_private;
+
+       return snprintf(buf, PAGE_SIZE, "%llu\n", adev->gmc.visible_vram_size);
+}
+
+/**
+ * DOC: mem_info_vram_used
+ *
+ * The amdgpu driver provides a sysfs API for reporting current total VRAM
+ * available on the device
+ * The file mem_info_vram_used is used for this and returns the total
+ * amount of currently used VRAM in bytes
+ */
+static ssize_t amdgpu_mem_info_vram_used_show(struct device *dev,
+               struct device_attribute *attr, char *buf)
+{
+       struct drm_device *ddev = dev_get_drvdata(dev);
+       struct amdgpu_device *adev = ddev->dev_private;
+
+       return snprintf(buf, PAGE_SIZE, "%llu\n",
+               amdgpu_vram_mgr_usage(&adev->mman.bdev.man[TTM_PL_VRAM]));
+}
+
+/**
+ * DOC: mem_info_vis_vram_used
+ *
+ * The amdgpu driver provides a sysfs API for reporting current total of
+ * used visible VRAM
+ * The file mem_info_vis_vram_used is used for this and returns the total
+ * amount of currently used visible VRAM in bytes
+ */
+static ssize_t amdgpu_mem_info_vis_vram_used_show(struct device *dev,
+               struct device_attribute *attr, char *buf)
+{
+       struct drm_device *ddev = dev_get_drvdata(dev);
+       struct amdgpu_device *adev = ddev->dev_private;
+
+       return snprintf(buf, PAGE_SIZE, "%llu\n",
+               amdgpu_vram_mgr_vis_usage(&adev->mman.bdev.man[TTM_PL_VRAM]));
+}
+
+static DEVICE_ATTR(mem_info_vram_total, S_IRUGO,
+                  amdgpu_mem_info_vram_total_show, NULL);
+static DEVICE_ATTR(mem_info_vis_vram_total, S_IRUGO,
+                  amdgpu_mem_info_vis_vram_total_show,NULL);
+static DEVICE_ATTR(mem_info_vram_used, S_IRUGO,
+                  amdgpu_mem_info_vram_used_show, NULL);
+static DEVICE_ATTR(mem_info_vis_vram_used, S_IRUGO,
+                  amdgpu_mem_info_vis_vram_used_show, NULL);
+
 /**
  * amdgpu_vram_mgr_init - init VRAM manager and DRM MM
  *
@@ -43,7 +122,9 @@ struct amdgpu_vram_mgr {
 static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
                                unsigned long p_size)
 {
+       struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
        struct amdgpu_vram_mgr *mgr;
+       int ret;
 
        mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
        if (!mgr)
@@ -52,6 +133,29 @@ static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
        drm_mm_init(&mgr->mm, 0, p_size);
        spin_lock_init(&mgr->lock);
        man->priv = mgr;
+
+       /* Add the two VRAM-related sysfs files */
+       ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_total);
+       if (ret) {
+               DRM_ERROR("Failed to create device file mem_info_vram_total\n");
+               return ret;
+       }
+       ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
+       if (ret) {
+               DRM_ERROR("Failed to create device file mem_info_vis_vram_total\n");
+               return ret;
+       }
+       ret = device_create_file(adev->dev, &dev_attr_mem_info_vram_used);
+       if (ret) {
+               DRM_ERROR("Failed to create device file mem_info_vram_used\n");
+               return ret;
+       }
+       ret = device_create_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
+       if (ret) {
+               DRM_ERROR("Failed to create device file mem_info_vis_vram_used\n");
+               return ret;
+       }
+
        return 0;
 }
 
@@ -65,6 +169,7 @@ static int amdgpu_vram_mgr_init(struct ttm_mem_type_manager *man,
  */
 static int amdgpu_vram_mgr_fini(struct ttm_mem_type_manager *man)
 {
+       struct amdgpu_device *adev = amdgpu_ttm_adev(man->bdev);
        struct amdgpu_vram_mgr *mgr = man->priv;
 
        spin_lock(&mgr->lock);
@@ -72,6 +177,10 @@ static int amdgpu_vram_mgr_fini(struct ttm_mem_type_manager *man)
        spin_unlock(&mgr->lock);
        kfree(mgr);
        man->priv = NULL;
+       device_remove_file(adev->dev, &dev_attr_mem_info_vram_total);
+       device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_total);
+       device_remove_file(adev->dev, &dev_attr_mem_info_vram_used);
+       device_remove_file(adev->dev, &dev_attr_mem_info_vis_vram_used);
        return 0;
 }