diff options
author | Philip Yang <Philip.Yang@amd.com> | 2021-10-05 11:13:21 -0400 |
---|---|---|
committer | Alex Deucher <alexander.deucher@amd.com> | 2021-10-13 14:15:46 -0400 |
commit | ca432dcc27a1bca71a5e7b35399617d5efb3af45 (patch) | |
tree | de84d0a6aaef0665bd940140141afb358904e881 | |
parent | a273bc9937e64ddb3798ba0fd5c92b5f3fce84c4 (diff) | |
download | linux-ca432dcc27a1bca71a5e7b35399617d5efb3af45.tar.bz2 |
drm/amdkfd: handle svm partial migration cpages 0
migrate_vma_setup may return cpages 0, means 0 page can be migrated,
treat this as error case to skip the rest of vma migration steps.
Change svm_migrate_vma_to_vram and svm_migrate_vma_to_ram to return the
number of pages migrated successfully or error code. The caller add up
all the successful migration pages and update prange->actual_loc only if
the total migrated pages is not 0.
This also removes the warning message "VRAM BO missing during
validation" if migration cpages is 0.
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
-rw-r--r-- | drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 86 |
1 files changed, 52 insertions, 34 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c index b05c0579d0b9..147300a161d0 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c @@ -376,7 +376,7 @@ out: return r; } -static int +static long svm_migrate_vma_to_vram(struct amdgpu_device *adev, struct svm_range *prange, struct vm_area_struct *vma, uint64_t start, uint64_t end) @@ -413,32 +413,37 @@ svm_migrate_vma_to_vram(struct amdgpu_device *adev, struct svm_range *prange, prange->start, prange->last); goto out_free; } - if (migrate.cpages != npages) { - pr_debug("Partial migration. 0x%lx/0x%llx pages can be migrated\n", - migrate.cpages, - npages); - } - if (migrate.cpages) { - r = svm_migrate_copy_to_vram(adev, prange, &migrate, &mfence, - scratch); - migrate_vma_pages(&migrate); - svm_migrate_copy_done(adev, mfence); - migrate_vma_finalize(&migrate); + if (migrate.cpages != npages) + pr_debug("partial migration, 0x%lx/0x%llx pages migrated\n", + migrate.cpages, npages); + else + pr_debug("0x%lx pages migrated\n", migrate.cpages); + + if (!migrate.cpages) { + pr_debug("failed collect migrate sys pages [0x%lx 0x%lx]\n", + prange->start, prange->last); + goto out_free; } + r = svm_migrate_copy_to_vram(adev, prange, &migrate, &mfence, scratch); + migrate_vma_pages(&migrate); + svm_migrate_copy_done(adev, mfence); + migrate_vma_finalize(&migrate); + svm_range_dma_unmap(adev->dev, scratch, 0, npages); svm_range_free_dma_mappings(prange); out_free: kvfree(buf); out: - if (!r) { + if (!r && migrate.cpages) { pdd = svm_range_get_pdd_by_adev(prange, adev); if (pdd) WRITE_ONCE(pdd->page_in, pdd->page_in + migrate.cpages); - } + return migrate.cpages; + } return r; } @@ -460,7 +465,8 @@ svm_migrate_ram_to_vram(struct svm_range *prange, uint32_t best_loc, unsigned long addr, start, end; struct vm_area_struct *vma; struct amdgpu_device *adev; - int r = 0; + unsigned long cpages = 0; + long r = 0; if (prange->actual_loc == best_loc) { pr_debug("svms 0x%p [0x%lx 0x%lx] already on best_loc 0x%x\n", @@ -492,17 +498,19 @@ svm_migrate_ram_to_vram(struct svm_range *prange, uint32_t best_loc, next = min(vma->vm_end, end); r = svm_migrate_vma_to_vram(adev, prange, vma, addr, next); - if (r) { - pr_debug("failed to migrate\n"); + if (r < 0) { + pr_debug("failed %ld to migrate\n", r); break; + } else { + cpages += r; } addr = next; } - if (!r) + if (cpages) prange->actual_loc = best_loc; - return r; + return r < 0 ? r : 0; } static void svm_migrate_page_free(struct page *page) @@ -603,7 +611,7 @@ out_oom: return r; } -static int +static long svm_migrate_vma_to_ram(struct amdgpu_device *adev, struct svm_range *prange, struct vm_area_struct *vma, uint64_t start, uint64_t end) { @@ -640,29 +648,35 @@ svm_migrate_vma_to_ram(struct amdgpu_device *adev, struct svm_range *prange, goto out_free; } - pr_debug("cpages %ld\n", migrate.cpages); + if (migrate.cpages != npages) + pr_debug("partial migration, 0x%lx/0x%llx pages migrated\n", + migrate.cpages, npages); + else + pr_debug("0x%lx pages migrated\n", migrate.cpages); - if (migrate.cpages) { - r = svm_migrate_copy_to_ram(adev, prange, &migrate, &mfence, - scratch, npages); - migrate_vma_pages(&migrate); - svm_migrate_copy_done(adev, mfence); - migrate_vma_finalize(&migrate); - } else { + if (!migrate.cpages) { pr_debug("failed collect migrate device pages [0x%lx 0x%lx]\n", prange->start, prange->last); + goto out_free; } + r = svm_migrate_copy_to_ram(adev, prange, &migrate, &mfence, + scratch, npages); + migrate_vma_pages(&migrate); + svm_migrate_copy_done(adev, mfence); + migrate_vma_finalize(&migrate); svm_range_dma_unmap(adev->dev, scratch, 0, npages); out_free: kvfree(buf); out: - if (!r) { + if (!r && migrate.cpages) { pdd = svm_range_get_pdd_by_adev(prange, adev); if (pdd) WRITE_ONCE(pdd->page_out, pdd->page_out + migrate.cpages); + + return migrate.cpages; } return r; } @@ -684,7 +698,8 @@ int svm_migrate_vram_to_ram(struct svm_range *prange, struct mm_struct *mm) unsigned long addr; unsigned long start; unsigned long end; - int r = 0; + unsigned long cpages = 0; + long r = 0; if (!prange->actual_loc) { pr_debug("[0x%lx 0x%lx] already migrated to ram\n", @@ -715,18 +730,21 @@ int svm_migrate_vram_to_ram(struct svm_range *prange, struct mm_struct *mm) next = min(vma->vm_end, end); r = svm_migrate_vma_to_ram(adev, prange, vma, addr, next); - if (r) { - pr_debug("failed %d to migrate\n", r); + if (r < 0) { + pr_debug("failed %ld to migrate\n", r); break; + } else { + cpages += r; } addr = next; } - if (!r) { + if (cpages) { svm_range_vram_node_free(prange); prange->actual_loc = 0; } - return r; + + return r < 0 ? r : 0; } /** |