Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 389 insertions, 0 deletions

diff --git a/drivers/crypto/omap-aes-gcm.c b/drivers/crypto/omap-aes-gcm.c
new file mode 100644
index 000000000..9f937bdc5
--- /dev/null
+++ b/drivers/crypto/omap-aes-gcm.c
@@ -0,0 +1,389 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Cryptographic API.
+ *
+ * Support for OMAP AES GCM HW acceleration.
+ *
+ * Copyright (c) 2016 Texas Instruments Incorporated
+ */
+
+#include <linux/errno.h>
+#include <linux/scatterlist.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/omap-dma.h>
+#include <linux/interrupt.h>
+#include <linux/pm_runtime.h>
+#include <crypto/aes.h>
+#include <crypto/gcm.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/skcipher.h>
+#include <crypto/internal/aead.h>
+
+#include "omap-crypto.h"
+#include "omap-aes.h"
+
+static int omap_aes_gcm_handle_queue(struct omap_aes_dev *dd,
+				     struct aead_request *req);
+
+static void omap_aes_gcm_finish_req(struct omap_aes_dev *dd, int ret)
+{
+	struct aead_request *req = dd->aead_req;
+
+	dd->in_sg = NULL;
+	dd->out_sg = NULL;
+
+	crypto_finalize_aead_request(dd->engine, req, ret);
+
+	pm_runtime_mark_last_busy(dd->dev);
+	pm_runtime_put_autosuspend(dd->dev);
+}
+
+static void omap_aes_gcm_done_task(struct omap_aes_dev *dd)
+{
+	u8 *tag;
+	int alen, clen, i, ret = 0, nsg;
+	struct omap_aes_reqctx *rctx;
+
+	alen = ALIGN(dd->assoc_len, AES_BLOCK_SIZE);
+	clen = ALIGN(dd->total, AES_BLOCK_SIZE);
+	rctx = aead_request_ctx(dd->aead_req);
+
+	nsg = !!(dd->assoc_len && dd->total);
+
+	dma_sync_sg_for_device(dd->dev, dd->out_sg, dd->out_sg_len,
+			       DMA_FROM_DEVICE);
+	dma_unmap_sg(dd->dev, dd->in_sg, dd->in_sg_len, DMA_TO_DEVICE);
+	dma_unmap_sg(dd->dev, dd->out_sg, dd->out_sg_len, DMA_FROM_DEVICE);
+	omap_aes_crypt_dma_stop(dd);
+
+	omap_crypto_cleanup(dd->out_sg, dd->orig_out,
+			    dd->aead_req->assoclen, dd->total,
+			    FLAGS_OUT_DATA_ST_SHIFT, dd->flags);
+
+	if (dd->flags & FLAGS_ENCRYPT)
+		scatterwalk_map_and_copy(rctx->auth_tag,
+					 dd->aead_req->dst,
+					 dd->total + dd->aead_req->assoclen,
+					 dd->authsize, 1);
+
+	omap_crypto_cleanup(&dd->in_sgl[0], NULL, 0, alen,
+			    FLAGS_ASSOC_DATA_ST_SHIFT, dd->flags);
+
+	omap_crypto_cleanup(&dd->in_sgl[nsg], NULL, 0, clen,
+			    FLAGS_IN_DATA_ST_SHIFT, dd->flags);
+
+	if (!(dd->flags & FLAGS_ENCRYPT)) {
+		tag = (u8 *)rctx->auth_tag;
+		for (i = 0; i < dd->authsize; i++) {
+			if (tag[i]) {
+				ret = -EBADMSG;
+			}
+		}
+	}
+
+	omap_aes_gcm_finish_req(dd, ret);
+}
+
+static int omap_aes_gcm_copy_buffers(struct omap_aes_dev *dd,
+				     struct aead_request *req)
+{
+	int alen, clen, cryptlen, assoclen, ret;
+	struct crypto_aead *aead = crypto_aead_reqtfm(req);
+	unsigned int authlen = crypto_aead_authsize(aead);
+	struct scatterlist *tmp, sg_arr[2];
+	int nsg;
+	u16 flags;
+
+	assoclen = req->assoclen;
+	cryptlen = req->cryptlen;
+
+	if (dd->flags & FLAGS_RFC4106_GCM)
+		assoclen -= 8;
+
+	if (!(dd->flags & FLAGS_ENCRYPT))
+		cryptlen -= authlen;
+
+	alen = ALIGN(assoclen, AES_BLOCK_SIZE);
+	clen = ALIGN(cryptlen, AES_BLOCK_SIZE);
+
+	nsg = !!(assoclen && cryptlen);
+
+	omap_aes_clear_copy_flags(dd);
+
+	sg_init_table(dd->in_sgl, nsg + 1);
+	if (assoclen) {
+		tmp = req->src;
+		ret = omap_crypto_align_sg(&tmp, assoclen,
+					   AES_BLOCK_SIZE, dd->in_sgl,
+					   OMAP_CRYPTO_COPY_DATA |
+					   OMAP_CRYPTO_ZERO_BUF |
+					   OMAP_CRYPTO_FORCE_SINGLE_ENTRY,
+					   FLAGS_ASSOC_DATA_ST_SHIFT,
+					   &dd->flags);
+		if (ret)
+			return ret;
+	}
+
+	if (cryptlen) {
+		tmp = scatterwalk_ffwd(sg_arr, req->src, req->assoclen);
+
+		if (nsg)
+			sg_unmark_end(dd->in_sgl);
+
+		ret = omap_crypto_align_sg(&tmp, cryptlen,
+					   AES_BLOCK_SIZE, &dd->in_sgl[nsg],
+					   OMAP_CRYPTO_COPY_DATA |
+					   OMAP_CRYPTO_ZERO_BUF |
+					   OMAP_CRYPTO_FORCE_SINGLE_ENTRY,
+					   FLAGS_IN_DATA_ST_SHIFT,
+					   &dd->flags);
+		if (ret)
+			return ret;
+	}
+
+	dd->in_sg = dd->in_sgl;
+	dd->total = cryptlen;
+	dd->assoc_len = assoclen;
+	dd->authsize = authlen;
+
+	dd->out_sg = req->dst;
+	dd->orig_out = req->dst;
+
+	dd->out_sg = scatterwalk_ffwd(sg_arr, req->dst, req->assoclen);
+
+	flags = 0;
+	if (req->src == req->dst || dd->out_sg == sg_arr)
+		flags |= OMAP_CRYPTO_FORCE_COPY;
+
+	if (cryptlen) {
+		ret = omap_crypto_align_sg(&dd->out_sg, cryptlen,
+					   AES_BLOCK_SIZE, &dd->out_sgl,
+					   flags,
+					   FLAGS_OUT_DATA_ST_SHIFT, &dd->flags);
+		if (ret)
+			return ret;
+	}
+
+	dd->in_sg_len = sg_nents_for_len(dd->in_sg, alen + clen);
+	dd->out_sg_len = sg_nents_for_len(dd->out_sg, clen);
+
+	return 0;
+}
+
+static int do_encrypt_iv(struct aead_request *req, u32 *tag, u32 *iv)
+{
+	struct omap_aes_gcm_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
+
+	aes_encrypt(&ctx->actx, (u8 *)tag, (u8 *)iv);
+	return 0;
+}
+
+void omap_aes_gcm_dma_out_callback(void *data)
+{
+	struct omap_aes_dev *dd = data;
+	struct omap_aes_reqctx *rctx;
+	int i, val;
+	u32 *auth_tag, tag[4];
+
+	if (!(dd->flags & FLAGS_ENCRYPT))
+		scatterwalk_map_and_copy(tag, dd->aead_req->src,
+					 dd->total + dd->aead_req->assoclen,
+					 dd->authsize, 0);
+
+	rctx = aead_request_ctx(dd->aead_req);
+	auth_tag = (u32 *)rctx->auth_tag;
+	for (i = 0; i < 4; i++) {
+		val = omap_aes_read(dd, AES_REG_TAG_N(dd, i));
+		auth_tag[i] = val ^ auth_tag[i];
+		if (!(dd->flags & FLAGS_ENCRYPT))
+			auth_tag[i] = auth_tag[i] ^ tag[i];
+	}
+
+	omap_aes_gcm_done_task(dd);
+}
+
+static int omap_aes_gcm_handle_queue(struct omap_aes_dev *dd,
+				     struct aead_request *req)
+{
+	if (req)
+		return crypto_transfer_aead_request_to_engine(dd->engine, req);
+
+	return 0;
+}
+
+static int omap_aes_gcm_prepare_req(struct crypto_engine *engine, void *areq)
+{
+	struct aead_request *req = container_of(areq, struct aead_request,
+						base);
+	struct omap_aes_reqctx *rctx = aead_request_ctx(req);
+	struct omap_aes_dev *dd = rctx->dd;
+	struct omap_aes_gcm_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
+	int err;
+
+	dd->aead_req = req;
+
+	rctx->mode &= FLAGS_MODE_MASK;
+	dd->flags = (dd->flags & ~FLAGS_MODE_MASK) | rctx->mode;
+
+	err = omap_aes_gcm_copy_buffers(dd, req);
+	if (err)
+		return err;
+
+	dd->ctx = &ctx->octx;
+
+	return omap_aes_write_ctrl(dd);
+}
+
+static int omap_aes_gcm_crypt(struct aead_request *req, unsigned long mode)
+{
+	struct omap_aes_reqctx *rctx = aead_request_ctx(req);
+	struct crypto_aead *aead = crypto_aead_reqtfm(req);
+	unsigned int authlen = crypto_aead_authsize(aead);
+	struct omap_aes_dev *dd;
+	__be32 counter = cpu_to_be32(1);
+	int err, assoclen;
+
+	memset(rctx->auth_tag, 0, sizeof(rctx->auth_tag));
+	memcpy(rctx->iv + GCM_AES_IV_SIZE, &counter, 4);
+
+	err = do_encrypt_iv(req, (u32 *)rctx->auth_tag, (u32 *)rctx->iv);
+	if (err)
+		return err;
+
+	if (mode & FLAGS_RFC4106_GCM)
+		assoclen = req->assoclen - 8;
+	else
+		assoclen = req->assoclen;
+	if (assoclen + req->cryptlen == 0) {
+		scatterwalk_map_and_copy(rctx->auth_tag, req->dst, 0, authlen,
+					 1);
+		return 0;
+	}
+
+	dd = omap_aes_find_dev(rctx);
+	if (!dd)
+		return -ENODEV;
+	rctx->mode = mode;
+
+	return omap_aes_gcm_handle_queue(dd, req);
+}
+
+int omap_aes_gcm_encrypt(struct aead_request *req)
+{
+	struct omap_aes_reqctx *rctx = aead_request_ctx(req);
+
+	memcpy(rctx->iv, req->iv, GCM_AES_IV_SIZE);
+	return omap_aes_gcm_crypt(req, FLAGS_ENCRYPT | FLAGS_GCM);
+}
+
+int omap_aes_gcm_decrypt(struct aead_request *req)
+{
+	struct omap_aes_reqctx *rctx = aead_request_ctx(req);
+
+	memcpy(rctx->iv, req->iv, GCM_AES_IV_SIZE);
+	return omap_aes_gcm_crypt(req, FLAGS_GCM);
+}
+
+int omap_aes_4106gcm_encrypt(struct aead_request *req)
+{
+	struct omap_aes_gcm_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
+	struct omap_aes_reqctx *rctx = aead_request_ctx(req);
+
+	memcpy(rctx->iv, ctx->octx.nonce, 4);
+	memcpy(rctx->iv + 4, req->iv, 8);
+	return crypto_ipsec_check_assoclen(req->assoclen) ?:
+	       omap_aes_gcm_crypt(req, FLAGS_ENCRYPT | FLAGS_GCM |
+				  FLAGS_RFC4106_GCM);
+}
+
+int omap_aes_4106gcm_decrypt(struct aead_request *req)
+{
+	struct omap_aes_gcm_ctx *ctx = crypto_aead_ctx(crypto_aead_reqtfm(req));
+	struct omap_aes_reqctx *rctx = aead_request_ctx(req);
+
+	memcpy(rctx->iv, ctx->octx.nonce, 4);
+	memcpy(rctx->iv + 4, req->iv, 8);
+	return crypto_ipsec_check_assoclen(req->assoclen) ?:
+	       omap_aes_gcm_crypt(req, FLAGS_GCM | FLAGS_RFC4106_GCM);
+}
+
+int omap_aes_gcm_setkey(struct crypto_aead *tfm, const u8 *key,
+			unsigned int keylen)
+{
+	struct omap_aes_gcm_ctx *ctx = crypto_aead_ctx(tfm);
+	int ret;
+
+	ret = aes_expandkey(&ctx->actx, key, keylen);
+	if (ret)
+		return ret;
+
+	memcpy(ctx->octx.key, key, keylen);
+	ctx->octx.keylen = keylen;
+
+	return 0;
+}
+
+int omap_aes_4106gcm_setkey(struct crypto_aead *tfm, const u8 *key,
+			    unsigned int keylen)
+{
+	struct omap_aes_gcm_ctx *ctx = crypto_aead_ctx(tfm);
+	int ret;
+
+	if (keylen < 4)
+		return -EINVAL;
+	keylen -= 4;
+
+	ret = aes_expandkey(&ctx->actx, key, keylen);
+	if (ret)
+		return ret;
+
+	memcpy(ctx->octx.key, key, keylen);
+	memcpy(ctx->octx.nonce, key + keylen, 4);
+	ctx->octx.keylen = keylen;
+
+	return 0;
+}
+
+int omap_aes_gcm_setauthsize(struct crypto_aead *tfm, unsigned int authsize)
+{
+	return crypto_gcm_check_authsize(authsize);
+}
+
+int omap_aes_4106gcm_setauthsize(struct crypto_aead *parent,
+				 unsigned int authsize)
+{
+	return crypto_rfc4106_check_authsize(authsize);
+}
+
+static int omap_aes_gcm_crypt_req(struct crypto_engine *engine, void *areq)
+{
+	struct aead_request *req = container_of(areq, struct aead_request,
+						base);
+	struct omap_aes_reqctx *rctx = aead_request_ctx(req);
+	struct omap_aes_dev *dd = rctx->dd;
+	int ret = 0;
+
+	if (!dd)
+		return -ENODEV;
+
+	if (dd->in_sg_len)
+		ret = omap_aes_crypt_dma_start(dd);
+	else
+		omap_aes_gcm_dma_out_callback(dd);
+
+	return ret;
+}
+
+int omap_aes_gcm_cra_init(struct crypto_aead *tfm)
+{
+	struct omap_aes_ctx *ctx = crypto_aead_ctx(tfm);
+
+	ctx->enginectx.op.prepare_request = omap_aes_gcm_prepare_req;
+	ctx->enginectx.op.unprepare_request = NULL;
+	ctx->enginectx.op.do_one_request = omap_aes_gcm_crypt_req;
+
+	crypto_aead_set_reqsize(tfm, sizeof(struct omap_aes_reqctx));
+
+	return 0;
+}