[PATCH 21/26] drm/xe/pf: Add helper to retrieve VF's LMEM object

Michał Winiarski
2025-10-11T19:41:56Z

From: Lukasz Laguna <lukasz.laguna@intel.com>

Instead of accessing VF's lmem_obj directly, introduce a helper function
to make the access more convenient.

Signed-off-by: Lukasz Laguna <lukasz.laguna@intel.com>
---
drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c | 30 ++++++++++++++++++++++
drivers/gpu/drm/xe/xe_gt_sriov_pf_config.h | 1 +
2 files changed, 31 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c b/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c
index 51027921b2988..94e434cac5cda 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.c
@@ -1662,6 +1662,36 @@ int xe_gt_sriov_pf_config_bulk_set_lmem(struct xe_gt *gt, unsigned int vfid,
"LMEM", n, err);
}

+static struct xe_bo *pf_get_vf_config_lmem_obj(struct xe_gt *gt, unsigned int vfid)
+{
+ struct xe_gt_sriov_config *config = pf_pick_vf_config(gt, vfid);
+
+ return config->lmem_obj;
+}
+
+/**
+ * xe_gt_sriov_pf_config_get_lmem_obj - Take a reference to &struct xe_bo backing VF LMEM.
+ * @gt: the &struct xe_gt
+ * @vfid: the VF identifier
+ *
+ * This function can only be called on PF.
+ *
+ * Return: pointer to &struct xe_bo backing VF LMEM.
+ */
+struct xe_bo *xe_gt_sriov_pf_config_get_lmem_obj(struct xe_gt *gt, unsigned int vfid)
+{
+ struct xe_bo *lmem_obj;
+
+ xe_gt_assert(gt, vfid);
+
+ mutex_lock(xe_gt_sriov_pf_master_mutex(gt));
+ lmem_obj = pf_get_vf_config_lmem_obj(gt, vfid);
+ xe_bo_get(lmem_obj);
+ mutex_unlock(xe_gt_sriov_pf_master_mutex(gt));
+
+ return lmem_obj;
+}
+
static u64 pf_query_free_lmem(struct xe_gt *gt)
{
struct xe_tile *tile = gt->tile;
diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.h b/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.h
index 6916b8f58ebf2..03c5dc0cd5fef 100644
--- a/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.h
+++ b/drivers/gpu/drm/xe/xe_gt_sriov_pf_config.h
@@ -36,6 +36,7 @@ int xe_gt_sriov_pf_config_set_lmem(struct xe_gt *gt, unsigned int vfid, u64 size
int xe_gt_sriov_pf_config_set_fair_lmem(struct xe_gt *gt, unsigned int vfid, unsigned int num_vfs);
int xe_gt_sriov_pf_config_bulk_set_lmem(struct xe_gt *gt, unsigned int vfid, unsigned int num_vfs,
u64 size);
+struct xe_bo *xe_gt_sriov_pf_config_get_lmem_obj(struct xe_gt *gt, unsigned int vfid);

u32 xe_gt_sriov_pf_config_get_exec_quantum(struct xe_gt *gt, unsigned int vfid);
int xe_gt_sriov_pf_config_set_exec_quantum(struct xe_gt *gt, unsigned int vfid, u32 exec_quantum);
--
2.50.1