[PATCH 1/1] drm/amdgpu/gfx8: add support kernel interface queue(KIQ)

[zhoucm1]

On 2016年12月22日 16:58, Yu, Xiangliang wrote:
>> -----Original Message-----
>> From: Zhou, David(ChunMing)
>> Sent: Tuesday, December 20, 2016 5:49 PM
>> To: Yu, Xiangliang <Xiangliang.Yu at amd.com>; amd-
>> gfx at lists.freedesktop.org
>> Cc: Liu, Monk <Monk.Liu at amd.com>
>> Subject: Re: [PATCH 1/1] drm/amdgpu/gfx8: add support kernel interface
>> queue(KIQ)
>>
>>
>>
>> On 2016年12月20日 17:48, Xiangliang Yu wrote:
>>> +	if (kiq->eop_obj == NULL) {
>>> +		r = amdgpu_bo_create(adev,
>>> +				     MEC_HPD_SIZE,
>>> +				     PAGE_SIZE, true,
>>> +				     AMDGPU_GEM_DOMAIN_GTT, 0, NULL,
>> NULL,
>>> +				     &kiq->eop_obj);
>>> +		if (r) {
>>> +			dev_warn(adev->dev, "(%d) create HDP EOP bo
>> failed\n", r);
>>> +			return r;
>>> +		}
>>> +	}
>>> +
>>> +	r = amdgpu_bo_reserve(kiq->eop_obj, false);
>>> +	if (unlikely(r != 0)) {
>>> +		gfx_v8_0_kiq_fini(adev);
>>> +		return r;
>>> +	}
>>> +
>>> +	r = amdgpu_bo_pin(kiq->eop_obj, AMDGPU_GEM_DOMAIN_GTT,
>>> +			  &kiq->eop_gpu_addr);
>>> +	if (r) {
>>> +		dev_warn(adev->dev, "(%d) pin HDP EOP bo failed\n", r);
>>> +		gfx_v8_0_kiq_fini(adev);
>>> +		return r;
>>> +	}
>>> +
>>> +	r = amdgpu_bo_kmap(kiq->eop_obj, (void **)&hpd);
>> you can use amdgpu_bo_create/free_kernel helper to do these.
> First I have same idea, but I find rlc_init & mec_init hasn't use this helper, I don’t know why. So just following rlc_init& mec_init behavior.
>
> Could you tell me why not use don’t use amdpgu_bo_create/free_kerenl helper in rlc_init & mec_init?
Yeah, I realized them as well, they certainly need to use helper, which 
could be forgot by code creator. You can do that with a separate patch 
for it, that would be  fine.

Regards,
David Zhou
>