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Revert "drm/amdkfd:remove unused code"

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This reverts commit f9caf6cdd5.

Needed for the next revert patch.

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>
This commit is contained in:
Philip Yang 2023-10-23 16:05:24 -04:00 committed by Alex Deucher
parent 78964fcac4
commit afaec204d2
2 changed files with 63 additions and 0 deletions
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60
drivers/gpu/drm/amd/amdkfd/kfd_svm.c
View File

@ -1147,6 +1147,66 @@ svm_range_add_child(struct svm_range *prange, struct mm_struct *mm,
list_add_tail(&pchild->child_list, &prange->child_list);
}
/**
* svm_range_split_by_granularity - collect ranges within granularity boundary
*
* @p: the process with svms list
* @mm: mm structure
* @addr: the vm fault address in pages, to split the prange
* @parent: parent range if prange is from child list
* @prange: prange to split
*
* Trims @prange to be a single aligned block of prange->granularity if
* possible. The head and tail are added to the child_list in @parent.
*
* Context: caller must hold mmap_read_lock and prange->lock
*
* Return:
* 0 - OK, otherwise error code
*/
int
svm_range_split_by_granularity(struct kfd_process *p, struct mm_struct *mm,
unsigned long addr, struct svm_range *parent,
struct svm_range *prange)
{
struct svm_range *head, *tail;
unsigned long start, last, size;
int r;
/* Align splited range start and size to granularity size, then a single
* PTE will be used for whole range, this reduces the number of PTE
* updated and the L1 TLB space used for translation.
*/
size = 1UL << prange->granularity;
start = ALIGN_DOWN(addr, size);
last = ALIGN(addr + 1, size) - 1;
pr_debug("svms 0x%p split [0x%lx 0x%lx] to [0x%lx 0x%lx] size 0x%lx\n",
prange->svms, prange->start, prange->last, start, last, size);
if (start > prange->start) {
r = svm_range_split(prange, start, prange->last, &head);
if (r)
return r;
svm_range_add_child(parent, mm, head, SVM_OP_ADD_RANGE);
}
if (last < prange->last) {
r = svm_range_split(prange, prange->start, last, &tail);
if (r)
return r;
svm_range_add_child(parent, mm, tail, SVM_OP_ADD_RANGE);
}
/* xnack on, update mapping on GPUs with ACCESS_IN_PLACE */
if (p->xnack_enabled && prange->work_item.op == SVM_OP_ADD_RANGE) {
prange->work_item.op = SVM_OP_ADD_RANGE_AND_MAP;
pr_debug("change prange 0x%p [0x%lx 0x%lx] op %d\n",
prange, prange->start, prange->last,
SVM_OP_ADD_RANGE_AND_MAP);
}
return 0;
}
static bool
svm_nodes_in_same_hive(struct kfd_node *node_a, struct kfd_node *node_b)
{

3
drivers/gpu/drm/amd/amdkfd/kfd_svm.h
View File

@ -172,6 +172,9 @@ struct kfd_node *svm_range_get_node_by_id(struct svm_range *prange,
int svm_range_vram_node_new(struct kfd_node *node, struct svm_range *prange,
bool clear);
void svm_range_vram_node_free(struct svm_range *prange);
int svm_range_split_by_granularity(struct kfd_process *p, struct mm_struct *mm,
unsigned long addr, struct svm_range *parent,
struct svm_range *prange);
int svm_range_restore_pages(struct amdgpu_device *adev, unsigned int pasid,
uint32_t vmid, uint32_t node_id, uint64_t addr,
bool write_fault);