diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c index a3fa1560de96..193ffdb957b6 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c @@ -1073,6 +1073,57 @@ static ssize_t amdgpu_debugfs_gfxoff_write(struct file *f, const char __user *bu } +/** + * amdgpu_debugfs_regs_gfxoff_status - read gfxoff status + * + * @f: open file handle + * @buf: User buffer to store read data in + * @size: Number of bytes to read + * @pos: Offset to seek to + */ +static ssize_t amdgpu_debugfs_gfxoff_read(struct file *f, char __user *buf, + size_t size, loff_t *pos) +{ + struct amdgpu_device *adev = file_inode(f)->i_private; + ssize_t result = 0; + int r; + + if (size & 0x3 || *pos & 0x3) + return -EINVAL; + + r = pm_runtime_get_sync(adev->ddev->dev); + if (r < 0) + return r; + + while (size) { + uint32_t value; + + r = amdgpu_get_gfx_off_status(adev, &value); + if (r) { + pm_runtime_mark_last_busy(adev->ddev->dev); + pm_runtime_put_autosuspend(adev->ddev->dev); + return r; + } + + r = put_user(value, (uint32_t *)buf); + if (r) { + pm_runtime_mark_last_busy(adev->ddev->dev); + pm_runtime_put_autosuspend(adev->ddev->dev); + return r; + } + + result += 4; + buf += 4; + *pos += 4; + size -= 4; + } + + pm_runtime_mark_last_busy(adev->ddev->dev); + pm_runtime_put_autosuspend(adev->ddev->dev); + + return result; +} + static const struct file_operations amdgpu_debugfs_regs_fops = { .owner = THIS_MODULE, .read = amdgpu_debugfs_regs_read, @@ -1123,7 +1174,9 @@ static const struct file_operations amdgpu_debugfs_gpr_fops = { static const struct file_operations amdgpu_debugfs_gfxoff_fops = { .owner = THIS_MODULE, + .read = amdgpu_debugfs_gfxoff_read, .write = amdgpu_debugfs_gfxoff_write, + .llseek = default_llseek }; static const struct file_operations *debugfs_regs[] = { |