[PATCH v7 0/4] drm: Move struct drm_device.pdev to legacy

[PATCH v7 0/4] drm: Move struct drm_device.pdev to legacy

[Thomas Zimmermann]

V7 of the patchset fixes some bitrot in the intel driver.

The pdev field in struct drm_device points to a PCI device structure and
goes back to UMS-only days when all DRM drivers were for PCI devices.
Meanwhile we also support USB, SPI and platform devices. Each of those
uses the generic device stored in struct drm_device.dev.

To reduce duplication and remove the special case of PCI, this patchset
converts all modesetting drivers from pdev to dev and makes pdev a field
for legacy UMS drivers.

For PCI devices, the pointer in struct drm_device.dev can be upcasted to
struct pci_device; or tested for PCI with dev_is_pci(). In several places
the code can use the dev field directly.

After converting all drivers and the DRM core, the pdev fields becomes
only relevant for legacy drivers. In a later patchset, we may want to
convert these as well and remove pdev entirely.

v7:
	* fix instances of pdev that have benn added under i915/
v6:
	* also remove assignment in i915/selftests in later patch (Chris)
v5:
	* remove assignment in later patch (Chris)
v4:
	* merged several patches
	* moved core changes into separate patch
	* vmwgfx build fix
v3:
	* merged several patches
	* fix one pdev reference in nouveau (Jeremy)
	* rebases
v2:
	* move whitespace fixes into separate patches (Alex, Sam)
	* move i915 gt/ and gvt/ changes into separate patches (Joonas)

Thomas Zimmermann (4):
  drm/i915/gt: Remove reference to struct drm_device.pdev
  drm/i915: Remove reference to struct drm_device.pdev
  drm/i915: Don't assign to struct drm_device.pdev
  drm: Move struct drm_device.pdev to legacy section

 drivers/gpu/drm/i915/gt/intel_region_lmem.c      | 2 +-
 drivers/gpu/drm/i915/i915_drv.c                  | 1 -
 drivers/gpu/drm/i915/intel_runtime_pm.h          | 2 +-
 drivers/gpu/drm/i915/selftests/mock_gem_device.c | 1 -
 include/drm/drm_device.h                         | 6 +++---
 5 files changed, 5 insertions(+), 7 deletions(-)

--
2.31.1

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[PATCH v7 1/4] drm/i915/gt: Remove reference to struct drm_device.pdev

[Thomas Zimmermann]

References to struct drm_device.pdev should be used any longer as
the field will be moved into the struct's legacy section. Add a fix
for the rsp commit.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: a50ca39fbd01 ("drm/i915: setup the LMEM region")
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Venkata Sandeep Dhanalakota <venkata.s.dhanalakota@intel.com>
Cc: "Michał Winiarski" <michal.winiarski@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_region_lmem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_region_lmem.c b/drivers/gpu/drm/i915/gt/intel_region_lmem.c
index be6f2c8f5184..73fceb0c25fc 100644
--- a/drivers/gpu/drm/i915/gt/intel_region_lmem.c
+++ b/drivers/gpu/drm/i915/gt/intel_region_lmem.c
@@ -177,7 +177,7 @@ static struct intel_memory_region *setup_lmem(struct intel_gt *gt)
 {
 	struct drm_i915_private *i915 = gt->i915;
 	struct intel_uncore *uncore = gt->uncore;
-	struct pci_dev *pdev = i915->drm.pdev;
+	struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
 	struct intel_memory_region *mem;
 	resource_size_t io_start;
 	resource_size_t lmem_size;
-- 
2.31.1

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[PATCH v7 2/4] drm/i915: Remove reference to struct drm_device.pdev

[Thomas Zimmermann]

References to struct drm_device.pdev should be used any longer as
the field will be moved into the struct's legacy section. Fix a rsp
comment.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/i915/intel_runtime_pm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.h b/drivers/gpu/drm/i915/intel_runtime_pm.h
index 1e4ddd11c12b..183ea2b187fe 100644
--- a/drivers/gpu/drm/i915/intel_runtime_pm.h
+++ b/drivers/gpu/drm/i915/intel_runtime_pm.h
@@ -49,7 +49,7 @@ enum i915_drm_suspend_mode {
  */
 struct intel_runtime_pm {
 	atomic_t wakeref_count;
-	struct device *kdev; /* points to i915->drm.pdev->dev */
+	struct device *kdev; /* points to i915->drm.dev */
 	bool available;
 	bool suspended;
 	bool irqs_enabled;
-- 
2.31.1

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[PATCH v7 3/4] drm/i915: Don't assign to struct drm_device.pdev

[Thomas Zimmermann]

Using struct drm_device.pdev is deprecated. Don't assign it. Users
should upcast from struct drm_device.dev.

v6:
	* also fix the assignment in selftests in this patch (Chris)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c                  | 1 -
 drivers/gpu/drm/i915/selftests/mock_gem_device.c | 1 -
 2 files changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 785dcf20c77b..db513f93f0f5 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -758,7 +758,6 @@ i915_driver_create(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (IS_ERR(i915))
 		return i915;
 
-	i915->drm.pdev = pdev;
 	pci_set_drvdata(pdev, i915);
 
 	/* Device parameters start as a copy of module parameters. */
diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
index 2ffc763fe90d..cf40004bc92a 100644
--- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c
+++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
@@ -146,7 +146,6 @@ struct drm_i915_private *mock_gem_device(void)
 	}
 
 	pci_set_drvdata(pdev, i915);
-	i915->drm.pdev = pdev;
 
 	dev_pm_domain_set(&pdev->dev, &pm_domain);
 	pm_runtime_enable(&pdev->dev);
-- 
2.31.1

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[PATCH v7 4/4] drm: Move struct drm_device.pdev to legacy section

[Thomas Zimmermann]

Struct drm_device.pdev is being moved to legacy status as only legacy
DRM drivers use it. A possible follow-up patchset could remove pdev
entirely.

v4:
	* rebased

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
---
 include/drm/drm_device.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h
index d647223e8390..c5a195676e8f 100644
--- a/include/drm/drm_device.h
+++ b/include/drm/drm_device.h
@@ -279,9 +279,6 @@ struct drm_device {
 	/** @agp: AGP data */
 	struct drm_agp_head *agp;
 
-	/** @pdev: PCI device structure */
-	struct pci_dev *pdev;
-
 	/** @num_crtcs: Number of CRTCs on this device */
 	unsigned int num_crtcs;
 
@@ -324,6 +321,9 @@ struct drm_device {
 	/* List of devices per driver for stealth attach cleanup */
 	struct list_head legacy_dev_list;
 
+	/* PCI device structure */
+	struct pci_dev *pdev;
+
 #ifdef __alpha__
 	/** @hose: PCI hose, only used on ALPHA platforms. */
 	struct pci_controller *hose;
-- 
2.31.1

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Re: [PATCH v7 0/4] drm: Move struct drm_device.pdev to legacy

[Jani Nikula]

On Tue, 27 Apr 2021, Thomas Zimmermann <tzimmermann@suse.de> wrote:
> V7 of the patchset fixes some bitrot in the intel driver.
>
> The pdev field in struct drm_device points to a PCI device structure and
> goes back to UMS-only days when all DRM drivers were for PCI devices.
> Meanwhile we also support USB, SPI and platform devices. Each of those
> uses the generic device stored in struct drm_device.dev.
>
> To reduce duplication and remove the special case of PCI, this patchset
> converts all modesetting drivers from pdev to dev and makes pdev a field
> for legacy UMS drivers.
>
> For PCI devices, the pointer in struct drm_device.dev can be upcasted to
> struct pci_device; or tested for PCI with dev_is_pci(). In several places
> the code can use the dev field directly.
>
> After converting all drivers and the DRM core, the pdev fields becomes
> only relevant for legacy drivers. In a later patchset, we may want to
> convert these as well and remove pdev entirely.

On the series,

Reviewed-by: Jani Nikula <jani.nikula@intel.com>

How should we merge these?



>
> v7:
> 	* fix instances of pdev that have benn added under i915/
> v6:
> 	* also remove assignment in i915/selftests in later patch (Chris)
> v5:
> 	* remove assignment in later patch (Chris)
> v4:
> 	* merged several patches
> 	* moved core changes into separate patch
> 	* vmwgfx build fix
> v3:
> 	* merged several patches
> 	* fix one pdev reference in nouveau (Jeremy)
> 	* rebases
> v2:
> 	* move whitespace fixes into separate patches (Alex, Sam)
> 	* move i915 gt/ and gvt/ changes into separate patches (Joonas)
>
> Thomas Zimmermann (4):
>   drm/i915/gt: Remove reference to struct drm_device.pdev
>   drm/i915: Remove reference to struct drm_device.pdev
>   drm/i915: Don't assign to struct drm_device.pdev
>   drm: Move struct drm_device.pdev to legacy section
>
>  drivers/gpu/drm/i915/gt/intel_region_lmem.c      | 2 +-
>  drivers/gpu/drm/i915/i915_drv.c                  | 1 -
>  drivers/gpu/drm/i915/intel_runtime_pm.h          | 2 +-
>  drivers/gpu/drm/i915/selftests/mock_gem_device.c | 1 -
>  include/drm/drm_device.h                         | 6 +++---
>  5 files changed, 5 insertions(+), 7 deletions(-)
>
> --
> 2.31.1
>

-- 
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Re: [PATCH v7 0/4] drm: Move struct drm_device.pdev to legacy

[Thomas Zimmermann]

[-- Attachment #1.1.1: Type: text/plain, Size: 3071 bytes --]

Hi Jani

Am 27.04.21 um 14:04 schrieb Jani Nikula:
> On Tue, 27 Apr 2021, Thomas Zimmermann <tzimmermann@suse.de> wrote:
>> V7 of the patchset fixes some bitrot in the intel driver.
>>
>> The pdev field in struct drm_device points to a PCI device structure and
>> goes back to UMS-only days when all DRM drivers were for PCI devices.
>> Meanwhile we also support USB, SPI and platform devices. Each of those
>> uses the generic device stored in struct drm_device.dev.
>>
>> To reduce duplication and remove the special case of PCI, this patchset
>> converts all modesetting drivers from pdev to dev and makes pdev a field
>> for legacy UMS drivers.
>>
>> For PCI devices, the pointer in struct drm_device.dev can be upcasted to
>> struct pci_device; or tested for PCI with dev_is_pci(). In several places
>> the code can use the dev field directly.
>>
>> After converting all drivers and the DRM core, the pdev fields becomes
>> only relevant for legacy drivers. In a later patchset, we may want to
>> convert these as well and remove pdev entirely.
> 
> On the series,
> 
> Reviewed-by: Jani Nikula <jani.nikula@intel.com>
> 
> How should we merge these?

Thanks for the quick reply.

There is another pdev patch that I just sent out. [1] It has to go into 
the intel tree. After it landed, I want to get this patchset into 
drm-misc-next ASAP. Otherwise, drm-tip would stop building.

This should fix things in the correct order and finally remove pdev for 
current drivers.

Best regards
Thomas

[1] 
https://lore.kernel.org/dri-devel/20210427110747.2065-1-tzimmermann@suse.de/T/#u

> 
> 
> 
>>
>> v7:
>> 	* fix instances of pdev that have benn added under i915/
>> v6:
>> 	* also remove assignment in i915/selftests in later patch (Chris)
>> v5:
>> 	* remove assignment in later patch (Chris)
>> v4:
>> 	* merged several patches
>> 	* moved core changes into separate patch
>> 	* vmwgfx build fix
>> v3:
>> 	* merged several patches
>> 	* fix one pdev reference in nouveau (Jeremy)
>> 	* rebases
>> v2:
>> 	* move whitespace fixes into separate patches (Alex, Sam)
>> 	* move i915 gt/ and gvt/ changes into separate patches (Joonas)
>>
>> Thomas Zimmermann (4):
>>    drm/i915/gt: Remove reference to struct drm_device.pdev
>>    drm/i915: Remove reference to struct drm_device.pdev
>>    drm/i915: Don't assign to struct drm_device.pdev
>>    drm: Move struct drm_device.pdev to legacy section
>>
>>   drivers/gpu/drm/i915/gt/intel_region_lmem.c      | 2 +-
>>   drivers/gpu/drm/i915/i915_drv.c                  | 1 -
>>   drivers/gpu/drm/i915/intel_runtime_pm.h          | 2 +-
>>   drivers/gpu/drm/i915/selftests/mock_gem_device.c | 1 -
>>   include/drm/drm_device.h                         | 6 +++---
>>   5 files changed, 5 insertions(+), 7 deletions(-)
>>
>> --
>> 2.31.1
>>
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer


[-- Attachment #1.2: OpenPGP digital signature --]
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[-- Attachment #2: Type: text/plain, Size: 160 bytes --]

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Re: [PATCH v7 0/4] drm: Move struct drm_device.pdev to legacy

[Jani Nikula]

On Tue, 27 Apr 2021, Thomas Zimmermann <tzimmermann@suse.de> wrote:
> Hi Jani
>
> Am 27.04.21 um 14:04 schrieb Jani Nikula:
>> On Tue, 27 Apr 2021, Thomas Zimmermann <tzimmermann@suse.de> wrote:
>>> V7 of the patchset fixes some bitrot in the intel driver.
>>>
>>> The pdev field in struct drm_device points to a PCI device structure and
>>> goes back to UMS-only days when all DRM drivers were for PCI devices.
>>> Meanwhile we also support USB, SPI and platform devices. Each of those
>>> uses the generic device stored in struct drm_device.dev.
>>>
>>> To reduce duplication and remove the special case of PCI, this patchset
>>> converts all modesetting drivers from pdev to dev and makes pdev a field
>>> for legacy UMS drivers.
>>>
>>> For PCI devices, the pointer in struct drm_device.dev can be upcasted to
>>> struct pci_device; or tested for PCI with dev_is_pci(). In several places
>>> the code can use the dev field directly.
>>>
>>> After converting all drivers and the DRM core, the pdev fields becomes
>>> only relevant for legacy drivers. In a later patchset, we may want to
>>> convert these as well and remove pdev entirely.
>> 
>> On the series,
>> 
>> Reviewed-by: Jani Nikula <jani.nikula@intel.com>
>> 
>> How should we merge these?
>
> Thanks for the quick reply.
>
> There is another pdev patch that I just sent out. [1] It has to go into 
> the intel tree. After it landed, I want to get this patchset into 
> drm-misc-next ASAP. Otherwise, drm-tip would stop building.

On merging the series via drm-misc-next,

Acked-by: Jani Nikula <jani.nikula@intel.com>

>
> This should fix things in the correct order and finally remove pdev for 
> current drivers.
>
> Best regards
> Thomas
>
> [1] 
> https://lore.kernel.org/dri-devel/20210427110747.2065-1-tzimmermann@suse.de/T/#u
>
>> 
>> 
>> 
>>>
>>> v7:
>>> 	* fix instances of pdev that have benn added under i915/
>>> v6:
>>> 	* also remove assignment in i915/selftests in later patch (Chris)
>>> v5:
>>> 	* remove assignment in later patch (Chris)
>>> v4:
>>> 	* merged several patches
>>> 	* moved core changes into separate patch
>>> 	* vmwgfx build fix
>>> v3:
>>> 	* merged several patches
>>> 	* fix one pdev reference in nouveau (Jeremy)
>>> 	* rebases
>>> v2:
>>> 	* move whitespace fixes into separate patches (Alex, Sam)
>>> 	* move i915 gt/ and gvt/ changes into separate patches (Joonas)
>>>
>>> Thomas Zimmermann (4):
>>>    drm/i915/gt: Remove reference to struct drm_device.pdev
>>>    drm/i915: Remove reference to struct drm_device.pdev
>>>    drm/i915: Don't assign to struct drm_device.pdev
>>>    drm: Move struct drm_device.pdev to legacy section
>>>
>>>   drivers/gpu/drm/i915/gt/intel_region_lmem.c      | 2 +-
>>>   drivers/gpu/drm/i915/i915_drv.c                  | 1 -
>>>   drivers/gpu/drm/i915/intel_runtime_pm.h          | 2 +-
>>>   drivers/gpu/drm/i915/selftests/mock_gem_device.c | 1 -
>>>   include/drm/drm_device.h                         | 6 +++---
>>>   5 files changed, 5 insertions(+), 7 deletions(-)
>>>
>>> --
>>> 2.31.1
>>>
>> 

-- 
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