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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251011193847.1836454-22-michal.winiarski@intel.com>
Date: Sat, 11 Oct 2025 21:38:42 +0200
From: Michał Winiarski <michal.winiarski@...el.com>
To: Alex Williamson <alex.williamson@...hat.com>, Lucas De Marchi
	<lucas.demarchi@...el.com>, Thomas Hellström
	<thomas.hellstrom@...ux.intel.com>, Rodrigo Vivi <rodrigo.vivi@...el.com>,
	Jason Gunthorpe <jgg@...pe.ca>, Yishai Hadas <yishaih@...dia.com>, Kevin Tian
	<kevin.tian@...el.com>, Shameer Kolothum
	<shameerali.kolothum.thodi@...wei.com>, <intel-xe@...ts.freedesktop.org>,
	<linux-kernel@...r.kernel.org>, <kvm@...r.kernel.org>
CC: <dri-devel@...ts.freedesktop.org>, Matthew Brost
	<matthew.brost@...el.com>, Michal Wajdeczko <michal.wajdeczko@...el.com>,
	Jani Nikula <jani.nikula@...ux.intel.com>, Joonas Lahtinen
	<joonas.lahtinen@...ux.intel.com>, Tvrtko Ursulin <tursulin@...ulin.net>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, "Lukasz
 Laguna" <lukasz.laguna@...el.com>
Subject: [PATCH 21/26] drm/xe/pf: Add helper to retrieve VF's LMEM object

From: Lukasz Laguna <lukasz.laguna@...el.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@...el.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