git/linux-net
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/ synced 2026-04-23 08:55:56 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/amdgpu: use user provided hmm_range buffer in amdgpu_ttm_tt_get_user_pages

Browse Source 
update the amdgpu_ttm_tt_get_user_pages and all dependent function
along with it callers to use a user allocated hmm_range buffer instead
hmm layer allocates the buffer.

This is a need to get hmm_range pointers easily accessible
without accessing the bo and that is a requirement for the
userqueue to lock the userptrs effectively.

Signed-off-by: Sunil Khatri <sunil.khatri@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Sunil Khatri
2025-09-24 12:23:26 +05:30
committed by Alex Deucher
parent 079ae5118e
commit e095b55155
8 changed files with 38 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
View File

@@ -1089,8 +1089,15 @@ static int init_user_pages(struct kgd_mem *mem, uint64_t user_addr,
return 0;
}
ret = amdgpu_ttm_tt_get_user_pages(bo, &range);
range = kzalloc(sizeof(*range), GFP_KERNEL);
if (unlikely(!range)) {
ret = -ENOMEM;
goto unregister_out;
}
ret = amdgpu_ttm_tt_get_user_pages(bo, range);
if (ret) {
kfree(range);
if (ret == -EAGAIN)
pr_debug("Failed to get user pages, try again\n");
else
@@ -2566,9 +2573,14 @@ static int update_invalid_user_pages(struct amdkfd_process_info *process_info,
}
}
mem->range = kzalloc(sizeof(*mem->range), GFP_KERNEL);
if (unlikely(!mem->range))
return -ENOMEM;
/* Get updated user pages */
ret = amdgpu_ttm_tt_get_user_pages(bo, &mem->range);
ret = amdgpu_ttm_tt_get_user_pages(bo, mem->range);
if (ret) {
kfree(mem->range);
mem->range = NULL;
pr_debug("Failed %d to get user pages\n", ret);
/* Return -EFAULT bad address error as success. It will