[PATCH 06/18] drm/amdgpu/sriov:fix memory leak after gpu reset
Christian König
christian.koenig at amd.com
Mon Sep 18 11:34:32 UTC 2017
Am 18.09.2017 um 12:47 schrieb Liu, Monk:
> I didn't get your point... how could bo_create_kernel solve my issue ?
It doesn't solve the underlying issue, you just need less code for your
workaround.
With bo_create_kernel you can do create/pin/kmap in just one function call.
>
> The thing here is during gpu reset we invoke hw_init for every hw component, and by design hw_init shouldn't doing anything software related, thus the BO allocating in hw_init is wrong,
Yeah, but your patch doesn't fix that either as far as I can see.
> Even switch to bo_create_kernel won't address the issue ...
See the implementation of bo_create_kernel():
> if (!*bo_ptr) {
> r = amdgpu_bo_create(adev, size, align, true, domain,
....
> }
....
> r = amdgpu_bo_pin(*bo_ptr, domain, gpu_addr);
...
> if (cpu_addr) {
> r = amdgpu_bo_kmap(*bo_ptr, cpu_addr);
...
> }
Creating is actually optional, but the function always pins the BO once
more and figures out it's CPU address.
As far as I can see that should solve your problem for now.
Christian.
>
>
> BR Monk
>
> -----Original Message-----
> From: Christian König [mailto:ckoenig.leichtzumerken at gmail.com]
> Sent: 2017年9月18日 17:13
> To: Liu, Monk <Monk.Liu at amd.com>; amd-gfx at lists.freedesktop.org
> Subject: Re: [PATCH 06/18] drm/amdgpu/sriov:fix memory leak after gpu reset
>
> Am 18.09.2017 um 08:11 schrieb Monk Liu:
>> doing gpu reset will rerun all hw_init and thus ucode_init_bo is
>> invoked again, so we need to skip the fw_buf allocation during sriov
>> gpu reset to avoid memory leak.
>>
>> Change-Id: I31131eda1bd45ea2f5bdc50c5da5fc5a9fe9027d
>> Signed-off-by: Monk Liu <Monk.Liu at amd.com>
>> ---
>> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 3 ++
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c | 64 +++++++++++++++----------------
>> 2 files changed, 35 insertions(+), 32 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> index 6ff2959..3d0c633 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> @@ -1185,6 +1185,9 @@ struct amdgpu_firmware {
>>
>> /* gpu info firmware data pointer */
>> const struct firmware *gpu_info_fw;
>> +
>> + void *fw_buf_ptr;
>> + uint64_t fw_buf_mc;
>> };
>>
>> /*
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c
>> index f306374..6564902 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c
>> @@ -360,8 +360,6 @@ static int amdgpu_ucode_patch_jt(struct amdgpu_firmware_info *ucode,
>> int amdgpu_ucode_init_bo(struct amdgpu_device *adev)
>> {
>> struct amdgpu_bo **bo = &adev->firmware.fw_buf;
>> - uint64_t fw_mc_addr;
>> - void *fw_buf_ptr = NULL;
>> uint64_t fw_offset = 0;
>> int i, err;
>> struct amdgpu_firmware_info *ucode = NULL; @@ -372,37 +370,39 @@
>> int amdgpu_ucode_init_bo(struct amdgpu_device *adev)
>> return 0;
>> }
>>
>> - err = amdgpu_bo_create(adev, adev->firmware.fw_size, PAGE_SIZE, true,
>> - amdgpu_sriov_vf(adev) ? AMDGPU_GEM_DOMAIN_VRAM : AMDGPU_GEM_DOMAIN_GTT,
>> - AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS,
>> - NULL, NULL, 0, bo);
>> - if (err) {
>> - dev_err(adev->dev, "(%d) Firmware buffer allocate failed\n", err);
>> - goto failed;
>> - }
>> + if (!amdgpu_sriov_vf(adev) || !adev->in_sriov_reset) {
> Instead of all this better use amdgpu_bo_create_kernel(), this should already include most of the handling necessary here.
>
> Christian.
>
>> + err = amdgpu_bo_create(adev, adev->firmware.fw_size, PAGE_SIZE, true,
>> + amdgpu_sriov_vf(adev) ? AMDGPU_GEM_DOMAIN_VRAM : AMDGPU_GEM_DOMAIN_GTT,
>> + AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS,
>> + NULL, NULL, 0, bo);
>> + if (err) {
>> + dev_err(adev->dev, "(%d) Firmware buffer allocate failed\n", err);
>> + goto failed;
>> + }
>>
>> - err = amdgpu_bo_reserve(*bo, false);
>> - if (err) {
>> - dev_err(adev->dev, "(%d) Firmware buffer reserve failed\n", err);
>> - goto failed_reserve;
>> - }
>> + err = amdgpu_bo_reserve(*bo, false);
>> + if (err) {
>> + dev_err(adev->dev, "(%d) Firmware buffer reserve failed\n", err);
>> + goto failed_reserve;
>> + }
>>
>> - err = amdgpu_bo_pin(*bo, amdgpu_sriov_vf(adev) ? AMDGPU_GEM_DOMAIN_VRAM : AMDGPU_GEM_DOMAIN_GTT,
>> - &fw_mc_addr);
>> - if (err) {
>> - dev_err(adev->dev, "(%d) Firmware buffer pin failed\n", err);
>> - goto failed_pin;
>> - }
>> + err = amdgpu_bo_pin(*bo, amdgpu_sriov_vf(adev) ? AMDGPU_GEM_DOMAIN_VRAM : AMDGPU_GEM_DOMAIN_GTT,
>> + &adev->firmware.fw_buf_mc);
>> + if (err) {
>> + dev_err(adev->dev, "(%d) Firmware buffer pin failed\n", err);
>> + goto failed_pin;
>> + }
>>
>> - err = amdgpu_bo_kmap(*bo, &fw_buf_ptr);
>> - if (err) {
>> - dev_err(adev->dev, "(%d) Firmware buffer kmap failed\n", err);
>> - goto failed_kmap;
>> - }
>> + err = amdgpu_bo_kmap(*bo, &adev->firmware.fw_buf_ptr);
>> + if (err) {
>> + dev_err(adev->dev, "(%d) Firmware buffer kmap failed\n", err);
>> + goto failed_kmap;
>> + }
>>
>> - amdgpu_bo_unreserve(*bo);
>> + amdgpu_bo_unreserve(*bo);
>> + }
>>
>> - memset(fw_buf_ptr, 0, adev->firmware.fw_size);
>> + memset(adev->firmware.fw_buf_ptr, 0, adev->firmware.fw_size);
>>
>> /*
>> * if SMU loaded firmware, it needn't add SMC, UVD, and VCE @@
>> -421,14 +421,14 @@ int amdgpu_ucode_init_bo(struct amdgpu_device *adev)
>> ucode = &adev->firmware.ucode[i];
>> if (ucode->fw) {
>> header = (const struct common_firmware_header *)ucode->fw->data;
>> - amdgpu_ucode_init_single_fw(adev, ucode, fw_mc_addr + fw_offset,
>> - (void *)((uint8_t *)fw_buf_ptr + fw_offset));
>> + amdgpu_ucode_init_single_fw(adev, ucode, adev->firmware.fw_buf_mc + fw_offset,
>> + adev->firmware.fw_buf_ptr + fw_offset);
>> if (i == AMDGPU_UCODE_ID_CP_MEC1 &&
>> adev->firmware.load_type != AMDGPU_FW_LOAD_PSP) {
>> const struct gfx_firmware_header_v1_0 *cp_hdr;
>> cp_hdr = (const struct gfx_firmware_header_v1_0 *)ucode->fw->data;
>> - amdgpu_ucode_patch_jt(ucode, fw_mc_addr + fw_offset,
>> - fw_buf_ptr + fw_offset);
>> + amdgpu_ucode_patch_jt(ucode, adev->firmware.fw_buf_mc + fw_offset,
>> + adev->firmware.fw_buf_ptr + fw_offset);
>> fw_offset += ALIGN(le32_to_cpu(cp_hdr->jt_size) << 2, PAGE_SIZE);
>> }
>> fw_offset += ALIGN(ucode->ucode_size, PAGE_SIZE);
>
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