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drm/amdgpu: add read amdgpu_gfxoff status in debugfs

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Add interface for SMU12 device, used by UMR.

v2: fix code style

Signed-off-by: Jinzhou.Su <Jinzhou.Su@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jinzhou.Su
2020-07-07 18:52:18 +08:00
committed by Alex Deucher
parent 6ece96a137
commit 443c7f3c36
7 changed files with 86 additions and 0 deletions
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53
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
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@@ -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[] = {