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drm/xe: Create LRC BO without VM

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Specifying VM during lrc->bo creation requires VM's reference
to be held for the lifetime of lrc->bo as it will use VM's dma
reservation object. Using VM's dma reservation object for
lrc->bo doesn't provide any advantage. Hence do not pass VM
while creating lrc->bo.

v2: Use xe_bo_unpin_map_no_vm (Matthew Brost)

Fixes: 264eecdba2 ("drm/xe: Decouple xe_exec_queue and xe_lrc")
Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20250529052031.2429120-2-niranjana.vishwanathapura@intel.com
(cherry picked from commit fbeaad071a)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
This commit is contained in:
Niranjana Vishwanathapura 2025-05-28 22:20:32 -07:00 committed by Thomas Hellström
parent 2e824747cf
commit 2b0a0ce0c2
2 changed files with 4 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/gpu/drm/xe/xe_exec_queue.c
View File

@ -132,12 +132,6 @@ static int __xe_exec_queue_init(struct xe_exec_queue *q)
flags |= XE_LRC_CREATE_RUNALONE;
}
if (vm) {
err = xe_vm_lock(vm, true);
if (err)
return err;
}
for (i = 0; i < q->width; ++i) {
q->lrc[i] = xe_lrc_create(q->hwe, q->vm, SZ_16K, q->msix_vec, flags);
if (IS_ERR(q->lrc[i])) {
@ -146,9 +140,6 @@ static int __xe_exec_queue_init(struct xe_exec_queue *q)
}
}
if (vm)
xe_vm_unlock(vm);
err = q->ops->init(q);
if (err)
goto err_lrc;

23
drivers/gpu/drm/xe/xe_lrc.c
View File

@ -876,10 +876,7 @@ static void xe_lrc_set_ppgtt(struct xe_lrc *lrc, struct xe_vm *vm)
static void xe_lrc_finish(struct xe_lrc *lrc)
{
xe_hw_fence_ctx_finish(&lrc->fence_ctx);
xe_bo_lock(lrc->bo, false);
xe_bo_unpin(lrc->bo);
xe_bo_unlock(lrc->bo);
xe_bo_put(lrc->bo);
xe_bo_unpin_map_no_vm(lrc->bo);
}
#define PVC_CTX_ASID (0x2e + 1)
@ -914,7 +911,7 @@ static int xe_lrc_init(struct xe_lrc *lrc, struct xe_hw_engine *hwe,
* FIXME: Perma-pinning LRC as we don't yet support moving GGTT address
* via VM bind calls.
*/
lrc->bo = xe_bo_create_pin_map(xe, tile, vm, lrc_size,
lrc->bo = xe_bo_create_pin_map(xe, tile, NULL, lrc_size,
ttm_bo_type_kernel,
bo_flags);
if (IS_ERR(lrc->bo))
@ -1676,9 +1673,6 @@ struct xe_lrc_snapshot *xe_lrc_snapshot_capture(struct xe_lrc *lrc)
if (!snapshot)
return NULL;
if (lrc->bo->vm)
xe_vm_get(lrc->bo->vm);
snapshot->context_desc = xe_lrc_ggtt_addr(lrc);
snapshot->ring_addr = __xe_lrc_ring_ggtt_addr(lrc);
snapshot->indirect_context_desc = xe_lrc_indirect_ring_ggtt_addr(lrc);
@ -1700,14 +1694,12 @@ struct xe_lrc_snapshot *xe_lrc_snapshot_capture(struct xe_lrc *lrc)
void xe_lrc_snapshot_capture_delayed(struct xe_lrc_snapshot *snapshot)
{
struct xe_bo *bo;
struct xe_vm *vm;
struct iosys_map src;
if (!snapshot)
return;
bo = snapshot->lrc_bo;
vm = bo->vm;
snapshot->lrc_bo = NULL;
snapshot->lrc_snapshot = kvmalloc(snapshot->lrc_size, GFP_KERNEL);
@ -1727,8 +1719,6 @@ void xe_lrc_snapshot_capture_delayed(struct xe_lrc_snapshot *snapshot)
xe_bo_unlock(bo);
put_bo:
xe_bo_put(bo);
if (vm)
xe_vm_put(vm);
}
void xe_lrc_snapshot_print(struct xe_lrc_snapshot *snapshot, struct drm_printer *p)
@ -1781,14 +1771,9 @@ void xe_lrc_snapshot_free(struct xe_lrc_snapshot *snapshot)
return;
kvfree(snapshot->lrc_snapshot);
if (snapshot->lrc_bo) {
struct xe_vm *vm;
vm = snapshot->lrc_bo->vm;
if (snapshot->lrc_bo)
xe_bo_put(snapshot->lrc_bo);
if (vm)
xe_vm_put(vm);
}
kfree(snapshot);
}