From 9f8df7d71e382c9afa808a08c11a990e90ac7df4 Mon Sep 17 00:00:00 2001 From: Tom St Denis Date: Thu, 9 Feb 2017 14:29:01 -0500 Subject: drm/amd/amdgpu: Update read_sensor calls to have size parameter (v3) This update allows sensors to return more than 1 value and indicates to the caller how many bytes are written. The debugfs interface has been updated to handle reading all of the values. Simply seek to the enum value (multiplied by 4) and then read as many bytes as the sensor provides. (v2): Don't set size to 4 before reading GPU_POWER (v3): agd: rebase Signed-off-by: Tom St Denis Reviewed-by: Alex Deucher Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 26 +++++++++++++++++++------- 1 file changed, 19 insertions(+), 7 deletions(-) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_device.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c index 552452a654a5..f186c20f636b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c @@ -3106,24 +3106,36 @@ static ssize_t amdgpu_debugfs_sensor_read(struct file *f, char __user *buf, size_t size, loff_t *pos) { struct amdgpu_device *adev = file_inode(f)->i_private; - int idx, r; - int32_t value; + int idx, x, outsize, r, valuesize; + uint32_t values[16]; - if (size != 4 || *pos & 0x3) + if (size & 3 || *pos & 0x3) return -EINVAL; /* convert offset to sensor number */ idx = *pos >> 2; + valuesize = sizeof(values); if (adev->powerplay.pp_funcs && adev->powerplay.pp_funcs->read_sensor) - r = adev->powerplay.pp_funcs->read_sensor(adev->powerplay.pp_handle, idx, &value); + r = adev->powerplay.pp_funcs->read_sensor(adev->powerplay.pp_handle, idx, &values[0], &valuesize); else return -EINVAL; - if (!r) - r = put_user(value, (int32_t *)buf); + if (size > valuesize) + return -EINVAL; + + outsize = 0; + x = 0; + if (!r) { + while (size) { + r = put_user(values[x++], (int32_t *)buf); + buf += 4; + size -= 4; + outsize += 4; + } + } - return !r ? 4 : r; + return !r ? outsize : r; } static ssize_t amdgpu_debugfs_wave_read(struct file *f, char __user *buf, -- cgit v1.2.3-70-g09d2