diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_device.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 0237513086e8..665764ff7eb7 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -97,6 +97,28 @@ static const char *amdgpu_asic_name[] = { "LAST", }; +/** + * DOC: pcie_replay_count + * + * The amdgpu driver provides a sysfs API for reporting the total number + * of PCIe replays (NAKs) + * The file pcie_replay_count is used for this and returns the total + * number of replays as a sum of the NAKs generated and NAKs received + */ + +static ssize_t amdgpu_device_get_pcie_replay_count(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct drm_device *ddev = dev_get_drvdata(dev); + struct amdgpu_device *adev = ddev->dev_private; + uint64_t cnt = amdgpu_asic_get_pcie_replay_count(adev); + + return snprintf(buf, PAGE_SIZE, "%llu\n", cnt); +} + +static DEVICE_ATTR(pcie_replay_count, S_IRUGO, + amdgpu_device_get_pcie_replay_count, NULL); + static void amdgpu_device_get_pcie_info(struct amdgpu_device *adev); /** @@ -2721,6 +2743,12 @@ fence_driver_init: /* must succeed. */ amdgpu_ras_post_init(adev); + r = device_create_file(adev->dev, &dev_attr_pcie_replay_count); + if (r) { + dev_err(adev->dev, "Could not create pcie_replay_count"); + return r; + } + return 0; failed: @@ -2784,6 +2812,7 @@ void amdgpu_device_fini(struct amdgpu_device *adev) adev->rmmio = NULL; amdgpu_device_doorbell_fini(adev); amdgpu_debugfs_regs_cleanup(adev); + device_remove_file(adev->dev, &dev_attr_pcie_replay_count); } |