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drm/xe/vm: Don't pin the vm_resv during validation

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The pinning has the odd side-effect that unlocking *any* resv
during validation triggers an "unlocking pinned lock" warning.

Cc: Matthew Brost <matthew.brost@intel.com>
Fixes: 9d5558649f ("drm/xe: Rework eviction rejection of bound external bos")
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://lore.kernel.org/r/20250821143045.106005-2-thomas.hellstrom@linux.intel.com
This commit is contained in:
Thomas Hellström 2025-08-21 16:30:43 +02:00
parent 8ae04fe9ff
commit 0a51bf3e54
2 changed files with 4 additions and 16 deletions
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5
drivers/gpu/drm/xe/xe_bo.c
View File

@ -2468,7 +2468,6 @@ int xe_bo_validate(struct xe_bo *bo, struct xe_vm *vm, bool allow_res_evict)
.no_wait_gpu = false,
.gfp_retry_mayfail = true,
};
struct pin_cookie cookie;
int ret;
if (vm) {
@ -2479,10 +2478,10 @@ int xe_bo_validate(struct xe_bo *bo, struct xe_vm *vm, bool allow_res_evict)
ctx.resv = xe_vm_resv(vm);
}
cookie = xe_vm_set_validating(vm, allow_res_evict);
xe_vm_set_validating(vm, allow_res_evict);
trace_xe_bo_validate(bo);
ret = ttm_bo_validate(&bo->ttm, &bo->placement, &ctx);
xe_vm_clear_validating(vm, allow_res_evict, cookie);
xe_vm_clear_validating(vm, allow_res_evict);
return ret;
}

15
drivers/gpu/drm/xe/xe_vm.h
View File

@ -315,22 +315,14 @@ void xe_vm_snapshot_free(struct xe_vm_snapshot *snap);
* Register this task as currently making bos resident for the vm. Intended
* to avoid eviction by the same task of shared bos bound to the vm.
* Call with the vm's resv lock held.
*
* Return: A pin cookie that should be used for xe_vm_clear_validating().
*/
static inline struct pin_cookie xe_vm_set_validating(struct xe_vm *vm,
bool allow_res_evict)
static inline void xe_vm_set_validating(struct xe_vm *vm, bool allow_res_evict)
{
struct pin_cookie cookie = {};
if (vm && !allow_res_evict) {
xe_vm_assert_held(vm);
cookie = lockdep_pin_lock(&xe_vm_resv(vm)->lock.base);
/* Pairs with READ_ONCE in xe_vm_is_validating() */
WRITE_ONCE(vm->validating, current);
}
return cookie;
}
/**
@ -338,17 +330,14 @@ static inline struct pin_cookie xe_vm_set_validating(struct xe_vm *vm,
* @vm: Pointer to the vm or NULL
* @allow_res_evict: Eviction from @vm was allowed. Must be set to the same
* value as for xe_vm_set_validation().
* @cookie: Cookie obtained from xe_vm_set_validating().
*
* Register this task as currently making bos resident for the vm. Intended
* to avoid eviction by the same task of shared bos bound to the vm.
* Call with the vm's resv lock held.
*/
static inline void xe_vm_clear_validating(struct xe_vm *vm, bool allow_res_evict,
struct pin_cookie cookie)
static inline void xe_vm_clear_validating(struct xe_vm *vm, bool allow_res_evict)
{
if (vm && !allow_res_evict) {
lockdep_unpin_lock(&xe_vm_resv(vm)->lock.base, cookie);
/* Pairs with READ_ONCE in xe_vm_is_validating() */
WRITE_ONCE(vm->validating, NULL);
}