[PATCH 1/3] drm/amdgpu: do not pass ttm_resource_manager to gtt_mgr
Lazar, Lijo
lijo.lazar at amd.com
Wed Oct 20 09:19:31 UTC 2021
On 10/20/2021 2:18 PM, Das, Nirmoy wrote:
>
> On 10/20/2021 8:49 AM, Christian König wrote:
>> Am 19.10.21 um 20:14 schrieb Nirmoy Das:
>>> Do not allow exported amdgpu_gtt_mgr_*() to accept
>>> any ttm_resource_manager pointer. Also there is no need
>>> to force other module to call a ttm function just to
>>> eventually call gtt_mgr functions.
>>
>> That's a rather bad idea I think.
>>
>> The GTT and VRAM manager work on their respective objects and not on
>> the adev directly.
>
>
> What is bothering me is : it is obvious that the amdgpu_gtt_mgr_usage()
> for example should only calculate
>
> usages for TTM_PL_TT type resource manager, why to pass that explicitly.
> I am trying to leverage the fact that
>
> we only have one gtt/vram manager for a adev and the functions that I
> changed work on whole gtt/vram manager
>
> as a unit.
>
Don't know about the functional aspects. From a sofware perspective,
amdgpu_gtt_mgr_*() operating on struct amdgpu_gtt_mgr *mgr seems more
logical.
Thanks,
Lijo
>
> Regards,
>
> Nirmoy
>
>
>>
>> Christian.
>>
>>>
>>> Signed-off-by: Nirmoy Das <nirmoy.das at amd.com>
>>> ---
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 4 +--
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c | 31 ++++++++++++---------
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 4 +--
>>> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h | 4 +--
>>> 4 files changed, 24 insertions(+), 19 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> index 41ce86244144..5807df52031c 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>> @@ -4287,7 +4287,7 @@ static int amdgpu_device_reset_sriov(struct
>>> amdgpu_device *adev,
>>> amdgpu_virt_init_data_exchange(adev);
>>> /* we need recover gart prior to run SMC/CP/SDMA resume */
>>> - amdgpu_gtt_mgr_recover(ttm_manager_type(&adev->mman.bdev, TTM_PL_TT));
>>> + amdgpu_gtt_mgr_recover(adev);
>>> r = amdgpu_device_fw_loading(adev);
>>> if (r)
>>> @@ -4604,7 +4604,7 @@ int amdgpu_do_asic_reset(struct list_head
>>> *device_list_handle,
>>> amdgpu_inc_vram_lost(tmp_adev);
>>> }
>>> - r =
>>> amdgpu_gtt_mgr_recover(ttm_manager_type(&tmp_adev->mman.bdev,
>>> TTM_PL_TT));
>>> + r = amdgpu_gtt_mgr_recover(tmp_adev);
>>> if (r)
>>> goto out;
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
>>> index c18f16b3be9c..5e41f8ef743a 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gtt_mgr.c
>>> @@ -77,10 +77,8 @@ static ssize_t
>>> amdgpu_mem_info_gtt_used_show(struct device *dev,
>>> {
>>> struct drm_device *ddev = dev_get_drvdata(dev);
>>> struct amdgpu_device *adev = drm_to_adev(ddev);
>>> - struct ttm_resource_manager *man;
>>> - man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
>>> - return sysfs_emit(buf, "%llu\n", amdgpu_gtt_mgr_usage(man));
>>> + return sysfs_emit(buf, "%llu\n", amdgpu_gtt_mgr_usage(adev));
>>> }
>>> static DEVICE_ATTR(mem_info_gtt_total, S_IRUGO,
>>> @@ -206,14 +204,19 @@ static void amdgpu_gtt_mgr_del(struct
>>> ttm_resource_manager *man,
>>> /**
>>> * amdgpu_gtt_mgr_usage - return usage of GTT domain
>>> *
>>> - * @man: TTM memory type manager
>>> + * @adev: amdgpu_device pointer
>>> *
>>> * Return how many bytes are used in the GTT domain
>>> */
>>> -uint64_t amdgpu_gtt_mgr_usage(struct ttm_resource_manager *man)
>>> +uint64_t amdgpu_gtt_mgr_usage(struct amdgpu_device *adev)
>>> {
>>> - struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
>>> - s64 result = man->size - atomic64_read(&mgr->available);
>>> + struct ttm_resource_manager *man;
>>> + struct amdgpu_gtt_mgr *mgr;
>>> + s64 result;
>>> +
>>> + man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
>>> + mgr = to_gtt_mgr(man);
>>> + result = man->size - atomic64_read(&mgr->available);
>>> return (result > 0 ? result : 0) * PAGE_SIZE;
>>> }
>>> @@ -221,19 +224,20 @@ uint64_t amdgpu_gtt_mgr_usage(struct
>>> ttm_resource_manager *man)
>>> /**
>>> * amdgpu_gtt_mgr_recover - re-init gart
>>> *
>>> - * @man: TTM memory type manager
>>> + * @adev: amdgpu_device pointer
>>> *
>>> * Re-init the gart for each known BO in the GTT.
>>> */
>>> -int amdgpu_gtt_mgr_recover(struct ttm_resource_manager *man)
>>> +int amdgpu_gtt_mgr_recover(struct amdgpu_device *adev)
>>> {
>>> - struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
>>> - struct amdgpu_device *adev;
>>> + struct ttm_resource_manager *man;
>>> + struct amdgpu_gtt_mgr *mgr;
>>> struct amdgpu_gtt_node *node;
>>> struct drm_mm_node *mm_node;
>>> int r = 0;
>>> - adev = container_of(mgr, typeof(*adev), mman.gtt_mgr);
>>> + man = ttm_manager_type(&adev->mman.bdev, TTM_PL_TT);
>>> + mgr = to_gtt_mgr(man);
>>> spin_lock(&mgr->lock);
>>> drm_mm_for_each_node(mm_node, &mgr->mm) {
>>> node = container_of(mm_node, typeof(*node), base.mm_nodes[0]);
>>> @@ -260,6 +264,7 @@ static void amdgpu_gtt_mgr_debug(struct
>>> ttm_resource_manager *man,
>>> struct drm_printer *printer)
>>> {
>>> struct amdgpu_gtt_mgr *mgr = to_gtt_mgr(man);
>>> + struct amdgpu_device *adev = container_of(mgr, typeof(*adev),
>>> mman.gtt_mgr);
>>> spin_lock(&mgr->lock);
>>> drm_mm_print(&mgr->mm, printer);
>>> @@ -267,7 +272,7 @@ static void amdgpu_gtt_mgr_debug(struct
>>> ttm_resource_manager *man,
>>> drm_printf(printer, "man size:%llu pages, gtt available:%lld
>>> pages, usage:%lluMB\n",
>>> man->size, (u64)atomic64_read(&mgr->available),
>>> - amdgpu_gtt_mgr_usage(man) >> 20);
>>> + amdgpu_gtt_mgr_usage(adev) >> 20);
>>> }
>>> static const struct ttm_resource_manager_func amdgpu_gtt_mgr_func
>>> = {
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>> index d2955ea4a62b..b9b38f70e416 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
>>> @@ -678,7 +678,7 @@ int amdgpu_info_ioctl(struct drm_device *dev,
>>> void *data, struct drm_file *filp)
>>> ui64 =
>>> amdgpu_vram_mgr_vis_usage(ttm_manager_type(&adev->mman.bdev,
>>> TTM_PL_VRAM));
>>> return copy_to_user(out, &ui64, min(size, 8u)) ? -EFAULT : 0;
>>> case AMDGPU_INFO_GTT_USAGE:
>>> - ui64 =
>>> amdgpu_gtt_mgr_usage(ttm_manager_type(&adev->mman.bdev, TTM_PL_TT));
>>> + ui64 = amdgpu_gtt_mgr_usage(adev);
>>> return copy_to_user(out, &ui64, min(size, 8u)) ? -EFAULT : 0;
>>> case AMDGPU_INFO_GDS_CONFIG: {
>>> struct drm_amdgpu_info_gds gds_info;
>>> @@ -738,7 +738,7 @@ int amdgpu_info_ioctl(struct drm_device *dev,
>>> void *data, struct drm_file *filp)
>>> mem.gtt.usable_heap_size = mem.gtt.total_heap_size -
>>> atomic64_read(&adev->gart_pin_size);
>>> mem.gtt.heap_usage =
>>> - amdgpu_gtt_mgr_usage(gtt_man);
>>> + amdgpu_gtt_mgr_usage(adev);
>>> mem.gtt.max_allocation = mem.gtt.usable_heap_size * 3 / 4;
>>> return copy_to_user(out, &mem,
>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
>>> index 91a087f9dc7c..6e337cacef51 100644
>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.h
>>> @@ -114,8 +114,8 @@ int amdgpu_vram_mgr_init(struct amdgpu_device
>>> *adev);
>>> void amdgpu_vram_mgr_fini(struct amdgpu_device *adev);
>>> bool amdgpu_gtt_mgr_has_gart_addr(struct ttm_resource *mem);
>>> -uint64_t amdgpu_gtt_mgr_usage(struct ttm_resource_manager *man);
>>> -int amdgpu_gtt_mgr_recover(struct ttm_resource_manager *man);
>>> +uint64_t amdgpu_gtt_mgr_usage(struct amdgpu_device *adev);
>>> +int amdgpu_gtt_mgr_recover(struct amdgpu_device *adev);
>>> uint64_t amdgpu_preempt_mgr_usage(struct ttm_resource_manager *man);
>>
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