summaryrefslogtreecommitdiffstats
path: root/net/xdp/xsk_queue.c
diff options
context:
space:
mode:
authorRob Herring (Arm) <robh@kernel.org>2026-08-31 14:43:51 -0500
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2026-09-13 18:17:31 -0700
commit55fc280e951ab2b39f3dcb640edc1b1eebc6d173 (patch)
treef0b5f37b42fc13b9908a31b657c646b024231cdd /net/xdp/xsk_queue.c
downloadlinux-stable-55fc280e951ab2b39f3dcb640edc1b1eebc6d173.tar.gz
linux-stable-55fc280e951ab2b39f3dcb640edc1b1eebc6d173.zip
Input: tsc2007 - read "ti,poll-period" as u32grafted
The "ti,poll-period" property is documented as a normal uint32 cell. The driver used a u64 helper, which makes the helper type disagree with the schema even though the stored value is still small. Read "ti,poll-period" with the u32 helper matching the documented DT cell size. Assisted-by: Codex:gpt-5-5 Signed-off-by: Rob Herring (Arm) <robh@kernel.org> Link: https://patch.msgid.link/20260831194352.1185860-1-robh@kernel.org Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'net/xdp/xsk_queue.c')
-rw-r--r--net/xdp/xsk_queue.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/net/xdp/xsk_queue.c b/net/xdp/xsk_queue.c
new file mode 100644
index 000000000..4dd01b7d8
--- /dev/null
+++ b/net/xdp/xsk_queue.c
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0
+/* XDP user-space ring structure
+ * Copyright(c) 2018 Intel Corporation.
+ */
+
+#include <linux/log2.h>
+#include <linux/slab.h>
+#include <linux/overflow.h>
+#include <linux/vmalloc.h>
+#include <net/xdp_sock_drv.h>
+
+#include "xsk_queue.h"
+
+static size_t xskq_get_ring_size(struct xsk_queue *q, bool umem_queue)
+{
+ struct xdp_umem_ring *umem_ring;
+ struct xdp_rxtx_ring *rxtx_ring;
+
+ if (umem_queue)
+ return struct_size(umem_ring, desc, q->nentries);
+ return struct_size(rxtx_ring, desc, q->nentries);
+}
+
+struct xsk_queue *xskq_create(u32 nentries, bool umem_queue)
+{
+ struct xsk_queue *q;
+ size_t size;
+
+ q = kzalloc_obj(*q);
+ if (!q)
+ return NULL;
+
+ q->nentries = nentries;
+ q->ring_mask = nentries - 1;
+
+ size = xskq_get_ring_size(q, umem_queue);
+
+ /* size which is overflowing or close to SIZE_MAX will become 0 in
+ * PAGE_ALIGN(), checking SIZE_MAX is enough due to the previous
+ * is_power_of_2(), the rest will be handled by vmalloc_user()
+ */
+ if (unlikely(size == SIZE_MAX)) {
+ kfree(q);
+ return NULL;
+ }
+
+ size = PAGE_ALIGN(size);
+
+ q->ring = vmalloc_user(size);
+ if (!q->ring) {
+ kfree(q);
+ return NULL;
+ }
+
+ q->ring_vmalloc_size = size;
+ return q;
+}
+
+void xskq_destroy(struct xsk_queue *q)
+{
+ if (!q)
+ return;
+
+ vfree(q->ring);
+ kfree(q);
+}