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drm/amd/amdgpu: Add gfxoff debugfs entry

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Write a 32-bit value of zero to disable GFXOFF and write a 32-bit
value of non-zero to enable GFXOFF.

Signed-off-by: Tom St Denis <tom.stdenis@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Tom St Denis 2020-02-21 13:45:10 -05:00 committed by Alex Deucher
parent c6fc97f9bc
commit 669e2f91e4
1 changed files with 56 additions and 0 deletions
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56
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
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@ -840,6 +840,55 @@ static ssize_t amdgpu_debugfs_gpr_read(struct file *f, char __user *buf,
return result;
}
/**
* amdgpu_debugfs_regs_gfxoff_write - Enable/disable GFXOFF
*
* @f: open file handle
* @buf: User buffer to write data from
* @size: Number of bytes to write
* @pos: Offset to seek to
*
* Write a 32-bit zero to disable or a 32-bit non-zero to enable
*/
static ssize_t amdgpu_debugfs_gfxoff_write(struct file *f, const 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 = get_user(value, (uint32_t *)buf);
if (r) {
pm_runtime_mark_last_busy(adev->ddev->dev);
pm_runtime_put_autosuspend(adev->ddev->dev);
return r;
}
amdgpu_gfx_off_ctrl(adev, value ? true : false);
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,
@ -888,6 +937,11 @@ static const struct file_operations amdgpu_debugfs_gpr_fops = {
.llseek = default_llseek
};
static const struct file_operations amdgpu_debugfs_gfxoff_fops = {
.owner = THIS_MODULE,
.write = amdgpu_debugfs_gfxoff_write,
};
static const struct file_operations *debugfs_regs[] = {
&amdgpu_debugfs_regs_fops,
&amdgpu_debugfs_regs_didt_fops,
@ -897,6 +951,7 @@ static const struct file_operations *debugfs_regs[] = {
&amdgpu_debugfs_sensors_fops,
&amdgpu_debugfs_wave_fops,
&amdgpu_debugfs_gpr_fops,
&amdgpu_debugfs_gfxoff_fops,
};
static const char *debugfs_regs_names[] = {
@ -908,6 +963,7 @@ static const char *debugfs_regs_names[] = {
"amdgpu_sensors",
"amdgpu_wave",
"amdgpu_gpr",
"amdgpu_gfxoff",
};
/**