On 2020-09-01 9:49 a.m., Alex Deucher wrote:
> On Tue, Sep 1, 2020 at 3:44 AM Daniel Vetter <daniel@xxxxxxxx> wrote:
>>
>> On Wed, Aug 19, 2020 at 01:00:42AM -0400, Luben Tuikov wrote:
>>> a) Embed struct drm_device into struct amdgpu_device.
>>> b) Modify the inline-f drm_to_adev() accordingly.
>>> c) Modify the inline-f adev_to_drm() accordingly.
>>> d) Eliminate the use of drm_device.dev_private,
>>> in amdgpu.
>>> e) Switch from using drm_dev_alloc() to
>>> drm_dev_init().
>>> f) Add a DRM driver release function, which frees
>>> the container amdgpu_device after all krefs on
>>> the contained drm_device have been released.
>>>
>>> v2: Split out adding adev_to_drm() into its own
>>> patch (previous commit), making this patch
>>> more succinct and clear. More detailed commit
>>> description.
>>>
>>> Signed-off-by: Luben Tuikov <luben.tuikov@xxxxxxx>
>>> ---
>>> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 10 ++---
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 15 +++-----
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 43 ++++++++++++++--------
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 20 +++-------
>>> 4 files changed, 43 insertions(+), 45 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> index 735480cc7dcf..107a6ec920f7 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>>> @@ -724,8 +724,8 @@ struct amd_powerplay {
>>> #define AMDGPU_MAX_DF_PERFMONS 4
>>> struct amdgpu_device {
>>> struct device *dev;
>>> - struct drm_device *ddev;
>>> struct pci_dev *pdev;
>>> + struct drm_device ddev;
>>>
>>> #ifdef CONFIG_DRM_AMD_ACP
>>> struct amdgpu_acp acp;
>>> @@ -990,12 +990,12 @@ struct amdgpu_device {
>>>
>>> static inline struct amdgpu_device *drm_to_adev(struct drm_device *ddev)
>>> {
>>> - return ddev->dev_private;
>>> + return container_of(ddev, struct amdgpu_device, ddev);
>>> }
>>>
>>> static inline struct drm_device *adev_to_drm(struct amdgpu_device *adev)
>>> {
>>> - return adev->ddev;
>>> + return &adev->ddev;
>>> }
>>>
>>> static inline struct amdgpu_device *amdgpu_ttm_adev(struct ttm_bo_device *bdev)
>>> @@ -1004,8 +1004,6 @@ static inline struct amdgpu_device *amdgpu_ttm_adev(struct ttm_bo_device *bdev)
>>> }
>>>
>>> int amdgpu_device_init(struct amdgpu_device *adev,
>>> - struct drm_device *ddev,
>>> - struct pci_dev *pdev,
>>> uint32_t flags);
>>> void amdgpu_device_fini(struct amdgpu_device *adev);
>>> int amdgpu_gpu_wait_for_idle(struct amdgpu_device *adev);
>>> @@ -1195,7 +1193,7 @@ static inline void *amdgpu_atpx_get_dhandle(void) { return NULL; }
>>> extern const struct drm_ioctl_desc amdgpu_ioctls_kms[];
>>> extern const int amdgpu_max_kms_ioctl;
>>>
>>> -int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags);
>>> +int amdgpu_driver_load_kms(struct amdgpu_device *adev, unsigned long flags);
>>> void amdgpu_driver_unload_kms(struct drm_device *dev);
>>> void amdgpu_driver_lastclose_kms(struct drm_device *dev);
>>> int amdgpu_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv);
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> index 07012d71eeea..6e529548e708 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> @@ -1216,7 +1216,8 @@ static int amdgpu_device_check_arguments(struct amdgpu_device *adev)
>>> * Callback for the switcheroo driver. Suspends or resumes the
>>> * the asics before or after it is powered up using ACPI methods.
>>> */
>>> -static void amdgpu_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
>>> +static void amdgpu_switcheroo_set_state(struct pci_dev *pdev,
>>> + enum vga_switcheroo_state state)
>>> {
>>> struct drm_device *dev = pci_get_drvdata(pdev);
>>> int r;
>>> @@ -2977,8 +2978,6 @@ static const struct attribute *amdgpu_dev_attributes[] = {
>>> * amdgpu_device_init - initialize the driver
>>> *
>>> * @adev: amdgpu_device pointer
>>> - * @ddev: drm dev pointer
>>> - * @pdev: pci dev pointer
>>> * @flags: driver flags
>>> *
>>> * Initializes the driver info and hw (all asics).
>>> @@ -2986,18 +2985,15 @@ static const struct attribute *amdgpu_dev_attributes[] = {
>>> * Called at driver startup.
>>> */
>>> int amdgpu_device_init(struct amdgpu_device *adev,
>>> - struct drm_device *ddev,
>>> - struct pci_dev *pdev,
>>> uint32_t flags)
>>> {
>>> + struct drm_device *ddev = adev_to_drm(adev);
>>> + struct pci_dev *pdev = adev->pdev;
>>> int r, i;
>>> bool boco = false;
>>> u32 max_MBps;
>>>
>>> adev->shutdown = false;
>>> - adev->dev = &pdev->dev;
>>> - adev->ddev = ddev;
>>> - adev->pdev = pdev;
>>> adev->flags = flags;
>>>
>>> if (amdgpu_force_asic_type >= 0 && amdgpu_force_asic_type < CHIP_LAST)
>>> @@ -3451,9 +3447,8 @@ int amdgpu_device_suspend(struct drm_device *dev, bool fbcon)
>>> struct drm_connector_list_iter iter;
>>> int r;
>>>
>>> - if (dev == NULL || dev->dev_private == NULL) {
>>> + if (!dev)
>>> return -ENODEV;
>>
>> Random comment, but is this really still needed?
>>
>
> Probably not. I think it's just left over from when we forked radeon.
Indeed! Since DRM dev is embedded into adev, it always exists.
I'll submit a patch to remove this check.
Regards,
Luben
>
> Alex
>
>
>> This pattern goes back to dri1 shadow attach trickery where everything was
>> horrible and we could end up with a device but not a device and trying to
>> suspend it.
>>
>> With a proper kms pci device you shouldn't ever end up in this situation
>> where the drm_device doesn't exist or isn't completely set up, but we're
>> trying to suspend. Maybe wrap in a WARN_ON at least?
>> -Daniel
>>
>>> - }
>>>
>>> adev = drm_to_adev(dev);
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>> index 38023c879db1..6866c515f00a 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
>>> @@ -1082,7 +1082,7 @@ static struct drm_driver kms_driver;
>>> static int amdgpu_pci_probe(struct pci_dev *pdev,
>>> const struct pci_device_id *ent)
>>> {
>>> - struct drm_device *dev;
>>> + struct drm_device *ddev;
>>> struct amdgpu_device *adev;
>>> unsigned long flags = ent->driver_data;
>>> int ret, retry = 0;
>>> @@ -1138,36 +1138,42 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
>>> if (ret)
>>> return ret;
>>>
>>> - dev = drm_dev_alloc(&kms_driver, &pdev->dev);
>>> - if (IS_ERR(dev))
>>> - return PTR_ERR(dev);
>>> + adev = kzalloc(sizeof(*adev), GFP_KERNEL);
>>> + if (!adev)
>>> + return -ENOMEM;
>>> +
>>> + adev->dev = &pdev->dev;
>>> + adev->pdev = pdev;
>>> + ddev = adev_to_drm(adev);
>>> + ret = drm_dev_init(ddev, &kms_driver, &pdev->dev);
>>> + if (ret)
>>> + goto err_free;
>>>
>>> if (!supports_atomic)
>>> - dev->driver_features &= ~DRIVER_ATOMIC;
>>> + ddev->driver_features &= ~DRIVER_ATOMIC;
>>>
>>> ret = pci_enable_device(pdev);
>>> if (ret)
>>> goto err_free;
>>>
>>> - dev->pdev = pdev;
>>> + ddev->pdev = pdev;
>>> + pci_set_drvdata(pdev, ddev);
>>>
>>> - pci_set_drvdata(pdev, dev);
>>> -
>>> - ret = amdgpu_driver_load_kms(dev, ent->driver_data);
>>> + ret = amdgpu_driver_load_kms(adev, ent->driver_data);
>>> if (ret)
>>> goto err_pci;
>>>
>>> retry_init:
>>> - ret = drm_dev_register(dev, ent->driver_data);
>>> + ret = drm_dev_register(ddev, ent->driver_data);
>>> if (ret == -EAGAIN && ++retry <= 3) {
>>> DRM_INFO("retry init %d\n", retry);
>>> /* Don't request EX mode too frequently which is attacking */
>>> msleep(5000);
>>> goto retry_init;
>>> - } else if (ret)
>>> + } else if (ret) {
>>> goto err_pci;
>>> + }
>>>
>>> - adev = drm_to_adev(dev);
>>> ret = amdgpu_debugfs_init(adev);
>>> if (ret)
>>> DRM_ERROR("Creating debugfs files failed (%d).\n", ret);
>>> @@ -1177,7 +1183,7 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
>>> err_pci:
>>> pci_disable_device(pdev);
>>> err_free:
>>> - drm_dev_put(dev);
>>> + drm_dev_put(ddev);
>>> return ret;
>>> }
>>>
>>> @@ -1197,6 +1203,14 @@ amdgpu_pci_remove(struct pci_dev *pdev)
>>> drm_dev_put(dev);
>>> }
>>>
>>> +static void amdgpu_driver_release(struct drm_device *ddev)
>>> +{
>>> + struct amdgpu_device *adev = drm_to_adev(ddev);
>>> +
>>> + drm_dev_fini(ddev);
>>> + kfree(adev);
>>> +}
>>> +
>>> static void
>>> amdgpu_pci_shutdown(struct pci_dev *pdev)
>>> {
>>> @@ -1491,6 +1505,7 @@ static struct drm_driver kms_driver = {
>>> .open = amdgpu_driver_open_kms,
>>> .postclose = amdgpu_driver_postclose_kms,
>>> .lastclose = amdgpu_driver_lastclose_kms,
>>> + .release = amdgpu_driver_release,
>>> .irq_handler = amdgpu_irq_handler,
>>> .ioctls = amdgpu_ioctls_kms,
>>> .gem_free_object_unlocked = amdgpu_gem_object_free,
>>> @@ -1525,8 +1540,6 @@ static struct pci_driver amdgpu_kms_pci_driver = {
>>> .driver.pm = &amdgpu_pm_ops,
>>> };
>>>
>>> -
>>> -
>>> static int __init amdgpu_init(void)
>>> {
>>> int r;
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>> index 47cd3558f9c7..f2a4fdcd542d 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>> @@ -86,7 +86,7 @@ void amdgpu_driver_unload_kms(struct drm_device *dev)
>>> amdgpu_unregister_gpu_instance(adev);
>>>
>>> if (adev->rmmio == NULL)
>>> - goto done_free;
>>> + return;
>>>
>>> if (adev->runpm) {
>>> pm_runtime_get_sync(dev->dev);
>>> @@ -96,10 +96,6 @@ void amdgpu_driver_unload_kms(struct drm_device *dev)
>>> amdgpu_acpi_fini(adev);
>>>
>>> amdgpu_device_fini(adev);
>>> -
>>> -done_free:
>>> - kfree(adev);
>>> - dev->dev_private = NULL;
>>> }
>>>
>>> void amdgpu_register_gpu_instance(struct amdgpu_device *adev)
>>> @@ -130,22 +126,18 @@ void amdgpu_register_gpu_instance(struct amdgpu_device *adev)
>>> /**
>>> * amdgpu_driver_load_kms - Main load function for KMS.
>>> *
>>> - * @dev: drm dev pointer
>>> + * @adev: pointer to struct amdgpu_device
>>> * @flags: device flags
>>> *
>>> * This is the main load function for KMS (all asics).
>>> * Returns 0 on success, error on failure.
>>> */
>>> -int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags)
>>> +int amdgpu_driver_load_kms(struct amdgpu_device *adev, unsigned long flags)
>>> {
>>> - struct amdgpu_device *adev;
>>> + struct drm_device *dev;
>>> int r, acpi_status;
>>>
>>> - adev = kzalloc(sizeof(struct amdgpu_device), GFP_KERNEL);
>>> - if (adev == NULL) {
>>> - return -ENOMEM;
>>> - }
>>> - dev->dev_private = (void *)adev;
>>> + dev = adev_to_drm(adev);
>>>
>>> if (amdgpu_has_atpx() &&
>>> (amdgpu_is_atpx_hybrid() ||
>>> @@ -160,7 +152,7 @@ int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags)
>>> * properly initialize the GPU MC controller and permit
>>> * VRAM allocation
>>> */
>>> - r = amdgpu_device_init(adev, dev, dev->pdev, flags);
>>> + r = amdgpu_device_init(adev, flags);
>>> if (r) {
>>> dev_err(&dev->pdev->dev, "Fatal error during GPU init\n");
>>> goto out;
>>> --
>>> 2.28.0.215.g878e727637
>>>
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>>
>> --
>> Daniel Vetter
>> Software Engineer, Intel Corporation
>> https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fblog.ffwll.ch%2F&data=02%7C01%7Cluben.tuikov%40amd.com%7Ca578357aacfd4c2147c208d84e7dcf9f%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637345649545602871&sdata=wamEB%2F1DRtIA7Rj3tkwbdnLbve9QPexn0IMqUNSznfs%3D&reserved=0
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