diff options
| author | Evan Quan <evan.quan@amd.com> | 2019-04-26 12:02:48 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2019-05-24 12:20:48 -0500 |
| commit | f120386d74f193301d808ccfec1a778af62b6797 (patch) | |
| tree | 721a613677c1e039001d34393376f28fdc45914c /drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | |
| parent | 767fb6b35dfaba08f514ca4f8f5fed1c442c40fd (diff) | |
| download | linux-f120386d74f193301d808ccfec1a778af62b6797.tar.bz2 | |
drm/amdgpu: add new sysfs interface for memory realtime utilization
A new sysfs interface mem_busy_percent is added for telling
how busy the VRAM is(in percentage).
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>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c index 6d2995fcfd33..58edf6f13d51 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c @@ -1312,6 +1312,32 @@ static ssize_t amdgpu_get_busy_percent(struct device *dev, } /** + * DOC: mem_busy_percent + * + * The amdgpu driver provides a sysfs API for reading how busy the VRAM + * is as a percentage. The file mem_busy_percent is used for this. + * The SMU firmware computes a percentage of load based on the + * aggregate activity level in the IP cores. + */ +static ssize_t amdgpu_get_memory_busy_percent(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct drm_device *ddev = dev_get_drvdata(dev); + struct amdgpu_device *adev = ddev->dev_private; + int r, value, size = sizeof(value); + + /* read the IP busy sensor */ + r = amdgpu_dpm_read_sensor(adev, AMDGPU_PP_SENSOR_MEM_LOAD, + (void *)&value, &size); + + if (r) + return r; + + return snprintf(buf, PAGE_SIZE, "%d\n", value); +} + +/** * DOC: pcie_bw * * The amdgpu driver provides a sysfs API for estimating how much data @@ -1380,6 +1406,8 @@ static DEVICE_ATTR(pp_od_clk_voltage, S_IRUGO | S_IWUSR, amdgpu_set_pp_od_clk_voltage); static DEVICE_ATTR(gpu_busy_percent, S_IRUGO, amdgpu_get_busy_percent, NULL); +static DEVICE_ATTR(mem_busy_percent, S_IRUGO, + amdgpu_get_memory_busy_percent, NULL); static DEVICE_ATTR(pcie_bw, S_IRUGO, amdgpu_get_pcie_bw, NULL); static DEVICE_ATTR(ppfeatures, S_IRUGO | S_IWUSR, amdgpu_get_ppfeature_status, @@ -2762,6 +2790,16 @@ int amdgpu_pm_sysfs_init(struct amdgpu_device *adev) "gpu_busy_level\n"); return ret; } + /* APU does not have its own dedicated memory */ + if (!(adev->flags & AMD_IS_APU)) { + ret = device_create_file(adev->dev, + &dev_attr_mem_busy_percent); + if (ret) { + DRM_ERROR("failed to create device file " + "mem_busy_percent\n"); + return ret; + } + } /* PCIe Perf counters won't work on APU nodes */ if (!(adev->flags & AMD_IS_APU)) { ret = device_create_file(adev->dev, &dev_attr_pcie_bw); @@ -2828,6 +2866,8 @@ void amdgpu_pm_sysfs_fini(struct amdgpu_device *adev) &dev_attr_pp_od_clk_voltage); device_remove_file(adev->dev, &dev_attr_gpu_busy_percent); if (!(adev->flags & AMD_IS_APU)) + device_remove_file(adev->dev, &dev_attr_mem_busy_percent); + if (!(adev->flags & AMD_IS_APU)) device_remove_file(adev->dev, &dev_attr_pcie_bw); if ((adev->asic_type >= CHIP_VEGA10) && !(adev->flags & AMD_IS_APU)) |