[PATCH] drm/amdgpu: Move VBIOS version to sysfs
Alex Deucher
alexdeucher at gmail.com
Fri Aug 25 19:17:23 UTC 2017
On Fri, Aug 25, 2017 at 3:13 PM, Christian König
<deathsimple at vodafone.de> wrote:
> Am 25.08.2017 um 16:41 schrieb Alex Deucher:
>>
>> On Fri, Aug 25, 2017 at 9:43 AM, Kent Russell <kent.russell at amd.com>
>> wrote:
>>>
>>> sysfs is more stable, and doesn't require root to access
>>>
>>> Signed-off-by: Kent Russell <kent.russell at amd.com>
>>
>> Might as well move the vbios binary itself to sysfs as well. It
>> should be a stable interface :)
>
>
> Yeah, but that is nothing a "normal" client application should be interested
> in.
>
> Additional to that I'm still not sure if a large binary BIOS qualifies as
> single value per file.
Well, you can read pci roms out of sysfs, so there is precedent. For
our purposes, debugfs is fine.
Alex
>
> Christian.
>
>
>>
>> Alex
>>
>>> ---
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 54
>>> +++++++++++++-----------------
>>> 1 file changed, 23 insertions(+), 31 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> index c041496..77929e4 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> @@ -67,7 +67,6 @@ static int amdgpu_debugfs_regs_init(struct
>>> amdgpu_device *adev);
>>> static void amdgpu_debugfs_regs_cleanup(struct amdgpu_device *adev);
>>> static int amdgpu_debugfs_test_ib_ring_init(struct amdgpu_device
>>> *adev);
>>> static int amdgpu_debugfs_vbios_dump_init(struct amdgpu_device *adev);
>>> -static int amdgpu_debugfs_vbios_version_init(struct amdgpu_device
>>> *adev);
>>>
>>> static const char *amdgpu_asic_name[] = {
>>> "TAHITI",
>>> @@ -890,6 +889,20 @@ static uint32_t cail_ioreg_read(struct card_info
>>> *info, uint32_t reg)
>>> return r;
>>> }
>>>
>>> +static ssize_t amdgpu_atombios_get_vbios_version(struct device *dev,
>>> + struct device_attribute
>>> *attr,
>>> + char *buf)
>>> +{
>>> + struct drm_device *ddev = dev_get_drvdata(dev);
>>> + struct amdgpu_device *adev = ddev->dev_private;
>>> + struct atom_context *ctx = adev->mode_info.atom_context;
>>> +
>>> + return snprintf(buf, PAGE_SIZE, "%s\n", ctx->vbios_version);
>>> +}
>>> +
>>> +static DEVICE_ATTR(vbios_version, 0444,
>>> amdgpu_atombios_get_vbios_version,
>>> + NULL);
>>> +
>>> /**
>>> * amdgpu_atombios_fini - free the driver info and callbacks for
>>> atombios
>>> *
>>> @@ -909,6 +922,7 @@ static void amdgpu_atombios_fini(struct amdgpu_device
>>> *adev)
>>> adev->mode_info.atom_context = NULL;
>>> kfree(adev->mode_info.atom_card_info);
>>> adev->mode_info.atom_card_info = NULL;
>>> + device_remove_file(adev->dev, &dev_attr_vbios_version);
>>> }
>>>
>>> /**
>>> @@ -925,6 +939,7 @@ static int amdgpu_atombios_init(struct amdgpu_device
>>> *adev)
>>> {
>>> struct card_info *atom_card_info =
>>> kzalloc(sizeof(struct card_info), GFP_KERNEL);
>>> + int ret;
>>>
>>> if (!atom_card_info)
>>> return -ENOMEM;
>>> @@ -961,6 +976,13 @@ static int amdgpu_atombios_init(struct amdgpu_device
>>> *adev)
>>> amdgpu_atombios_scratch_regs_init(adev);
>>> amdgpu_atombios_allocate_fb_scratch(adev);
>>> }
>>> +
>>> + ret = device_create_file(adev->dev, &dev_attr_vbios_version);
>>> + if (ret) {
>>> + DRM_ERROR("Failed to create device file for VBIOS
>>> version\n");
>>> + return ret;
>>> + }
>>> +
>>> return 0;
>>> }
>>>
>>> @@ -2256,10 +2278,6 @@ int amdgpu_device_init(struct amdgpu_device *adev,
>>> if (r)
>>> DRM_ERROR("Creating vbios dump debugfs failed (%d).\n",
>>> r);
>>>
>>> - r = amdgpu_debugfs_vbios_version_init(adev);
>>> - if (r)
>>> - DRM_ERROR("Creating vbios version debugfs failed
>>> (%d).\n", r);
>>> -
>>> if ((amdgpu_testing & 1)) {
>>> if (adev->accel_working)
>>> amdgpu_test_moves(adev);
>>> @@ -3851,39 +3869,17 @@ static int amdgpu_debugfs_get_vbios_dump(struct
>>> seq_file *m, void *data)
>>> return 0;
>>> }
>>>
>>> -static int amdgpu_debugfs_get_vbios_version(struct seq_file *m, void
>>> *data)
>>> -{
>>> - struct drm_info_node *node = (struct drm_info_node *) m->private;
>>> - struct drm_device *dev = node->minor->dev;
>>> - struct amdgpu_device *adev = dev->dev_private;
>>> - struct atom_context *ctx = adev->mode_info.atom_context;
>>> -
>>> - seq_printf(m, "%s\n", ctx->vbios_version);
>>> - return 0;
>>> -}
>>> -
>>> static const struct drm_info_list amdgpu_vbios_dump_list[] = {
>>> {"amdgpu_vbios",
>>> amdgpu_debugfs_get_vbios_dump,
>>> 0, NULL},
>>> };
>>>
>>> -static const struct drm_info_list amdgpu_vbios_version_list[] = {
>>> - {"amdgpu_vbios_version",
>>> - amdgpu_debugfs_get_vbios_version,
>>> - 0, NULL},
>>> -};
>>> -
>>> static int amdgpu_debugfs_vbios_dump_init(struct amdgpu_device *adev)
>>> {
>>> return amdgpu_debugfs_add_files(adev,
>>> amdgpu_vbios_dump_list, 1);
>>> }
>>> -static int amdgpu_debugfs_vbios_version_init(struct amdgpu_device *adev)
>>> -{
>>> - return amdgpu_debugfs_add_files(adev,
>>> - amdgpu_vbios_version_list, 1);
>>> -}
>>> #else
>>> static int amdgpu_debugfs_test_ib_ring_init(struct amdgpu_device *adev)
>>> {
>>> @@ -3897,9 +3893,5 @@ static int amdgpu_debugfs_vbios_dump_init(struct
>>> amdgpu_device *adev)
>>> {
>>> return 0;
>>> }
>>> -static int amdgpu_debugfs_vbios_version_init(struct amdgpu_device *adev)
>>> -{
>>> - return 0;
>>> -}
>>> static void amdgpu_debugfs_regs_cleanup(struct amdgpu_device *adev) { }
>>> #endif
>>> --
>>> 2.7.4
>>>
>>> _______________________________________________
>>> amd-gfx mailing list
>>> amd-gfx at lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>>
>> _______________________________________________
>> amd-gfx mailing list
>> amd-gfx at lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/amd-gfx
>
>
>
More information about the amd-gfx
mailing list