linux-kernel - Re: [PATCH 08/83] drm/radeon: Add calls to initialize and finalize kfd from radeon

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Date:	Thu, 17 Jul 2014 14:57:06 +0300
From:	Oded Gabbay <oded.gabbay@....com>
To:	Jerome Glisse <j.glisse@...il.com>,
	Oded Gabbay <oded.gabbay@...il.com>
CC:	David Airlie <airlied@...ux.ie>,
	Alex Deucher <alexander.deucher@....com>,
	<linux-kernel@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
	"John Bridgman" <John.Bridgman@....com>,
	Andrew Lewycky <Andrew.Lewycky@....com>,
	Joerg Roedel <joro@...tes.org>,
	Christian König <christian.koenig@....com>
Subject: Re: [PATCH 08/83] drm/radeon: Add calls to initialize and finalize
 kfd from radeon

On 11/07/14 19:36, Jerome Glisse wrote:
> On Fri, Jul 11, 2014 at 12:50:08AM +0300, Oded Gabbay wrote:
>> The KFD driver should be loaded when the radeon driver is loaded and
>> should be finalized when the radeon driver is removed.
>>
>> This patch adds a function call to initialize kfd from radeon_init
>> and a function call to finalize kfd from radeon_exit.
>>
>> If the KFD driver is not present in the system, the initialize call
>> fails and the radeon driver continues normally.
>>
>> This patch also adds calls to probe, initialize and finalize a kfd device
>> per radeon device using the kgd-->kfd interface.
>>
>> Signed-off-by: Oded Gabbay <oded.gabbay@....com>
>
> It might be nice to allow to build radeon without HSA so i think an
> CONFIG_HSA should be added and have other thing depends on it.
> Otherwise this one is.
>
> Reviewed-by: Jérôme Glisse <jglisse@...hat.com>
>
We do allow it :)
There is no problem building radeon without the kfd. In that case, when radeon 
finds out that kfd is not available, it simply moves on with its initialization 
procedure.
	Oded
>
>> ---
>>   drivers/gpu/drm/radeon/radeon_drv.c | 6 ++++++
>>   drivers/gpu/drm/radeon/radeon_kms.c | 9 +++++++++
>>   2 files changed, 15 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
>> index cb14213..88a45a0 100644
>> --- a/drivers/gpu/drm/radeon/radeon_drv.c
>> +++ b/drivers/gpu/drm/radeon/radeon_drv.c
>> @@ -151,6 +151,9 @@ static inline void radeon_register_atpx_handler(void) {}
>>   static inline void radeon_unregister_atpx_handler(void) {}
>>   #endif
>>
>> +extern bool radeon_kfd_init(void);
>> +extern void radeon_kfd_fini(void);
>> +
>>   int radeon_no_wb;
>>   int radeon_modeset = -1;
>>   int radeon_dynclks = -1;
>> @@ -630,12 +633,15 @@ static int __init radeon_init(void)
>>   #endif
>>   	}
>>
>> +	radeon_kfd_init();
>> +
>>   	/* let modprobe override vga console setting */
>>   	return drm_pci_init(driver, pdriver);
>>   }
>>
>>   static void __exit radeon_exit(void)
>>   {
>> +	radeon_kfd_fini();
>>   	drm_pci_exit(driver, pdriver);
>>   	radeon_unregister_atpx_handler();
>>   }
>> diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
>> index 35d9318..0748284 100644
>> --- a/drivers/gpu/drm/radeon/radeon_kms.c
>> +++ b/drivers/gpu/drm/radeon/radeon_kms.c
>> @@ -34,6 +34,10 @@
>>   #include <linux/slab.h>
>>   #include <linux/pm_runtime.h>
>>
>> +extern void radeon_kfd_device_probe(struct radeon_device *rdev);
>> +extern void radeon_kfd_device_init(struct radeon_device *rdev);
>> +extern void radeon_kfd_device_fini(struct radeon_device *rdev);
>> +
>>   #if defined(CONFIG_VGA_SWITCHEROO)
>>   bool radeon_has_atpx(void);
>>   #else
>> @@ -63,6 +67,8 @@ int radeon_driver_unload_kms(struct drm_device *dev)
>>
>>   	pm_runtime_get_sync(dev->dev);
>>
>> +	radeon_kfd_device_fini(rdev);
>> +
>>   	radeon_acpi_fini(rdev);
>>   	
>>   	radeon_modeset_fini(rdev);
>> @@ -142,6 +148,9 @@ int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
>>   				"Error during ACPI methods call\n");
>>   	}
>>
>> +	radeon_kfd_device_probe(rdev);
>> +	radeon_kfd_device_init(rdev);
>> +
>>   	if (radeon_is_px(dev)) {
>>   		pm_runtime_use_autosuspend(dev->dev);
>>   		pm_runtime_set_autosuspend_delay(dev->dev, 5000);
>> --
>> 1.9.1
>>

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