Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linuxgrafted

Pull I3C updates from Alexandre Belloni:
 "A new driver this cycle, for the AMD AXI I3C controller.

  There are also new features such as IBI wakeup support, SETAASA device
  discovery and ACPI support for the the DAA methods, meaning we can now
  communicate with the SPD devices on DDR5 modules.

  New driver:
   - AMD AXI I3C master controller

  Subsystem:
   - I3C Common Command Code (CCC) handling improvements, especially
     around GET CCCs
   - SETAASA device discovery support
   - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as
     well as I2C devices on I3C bus
   - IBI-based wakeup support

  Drivers:
   - dw: SETAASA support
   - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C
     controller support, PIO queue management support for HCI v1.2
   - renesas: improve suspend to RAM support, add runtime PM support"

* tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits)
  i3c: dw: reduce do_daa time if there's no client
  i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller
  i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2
  i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode
  i3c: dw: rename "pclk" to "apb" to match dt-binding
  i3c: dw: make struct dw_i3c_cmd smaller
  i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding
  i3c: renesas: Don't register devices when ENTDAA times out
  i3c: master: dw-i3c-master: fix OD timing for first broadcast
  i3c: mipi-i3c-hci: Advertise IBI wakeup capability
  i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev()
  i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI
  i3c: master: Reject IBI requests from non-IBI-capable devices
  i3c: master: Add helper to query bus wakeup requirements
  i3c: master: Report wakeup events for IBIs
  i3c: master: Support IBI-based wakeup capability
  i3c: master: Fix potential UAF in i3c_device_match()
  i3c: master: Fix potential UAF in i3c_device_uevent()
  i3c: Make dev->desc locking assumptions explicit
  i3c: master: Fix use-after-free of master->this
  ...

1 files changed, 450 insertions, 0 deletions

diff --git a/net/mac802154/rx.c b/net/mac802154/rx.c
new file mode 100644
index 000000000..cd8f2a119
--- /dev/null
+++ b/net/mac802154/rx.c
@@ -0,0 +1,450 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2007-2012 Siemens AG
+ *
+ * Written by:
+ * Pavel Smolenskiy <pavel.smolenskiy@gmail.com>
+ * Maxim Gorbachyov <maxim.gorbachev@siemens.com>
+ * Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
+ * Alexander Smirnov <alex.bluesman.smirnov@gmail.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/crc-ccitt.h>
+#include <linux/unaligned.h>
+
+#include <net/mac802154.h>
+#include <net/ieee802154_netdev.h>
+#include <net/nl802154.h>
+
+#include "ieee802154_i.h"
+
+static int ieee802154_deliver_skb(struct sk_buff *skb)
+{
+	skb->ip_summed = CHECKSUM_UNNECESSARY;
+	skb->protocol = htons(ETH_P_IEEE802154);
+
+	return netif_receive_skb(skb);
+}
+
+void mac802154_rx_beacon_worker(struct work_struct *work)
+{
+	struct ieee802154_local *local =
+		container_of(work, struct ieee802154_local, rx_beacon_work);
+	struct cfg802154_mac_pkt *mac_pkt;
+
+	mac_pkt = list_first_entry_or_null(&local->rx_beacon_list,
+					   struct cfg802154_mac_pkt, node);
+	if (!mac_pkt)
+		return;
+
+	mac802154_process_beacon(local, mac_pkt->skb, mac_pkt->page, mac_pkt->channel);
+
+	list_del(&mac_pkt->node);
+	kfree_skb(mac_pkt->skb);
+	kfree(mac_pkt);
+}
+
+static bool mac802154_should_answer_beacon_req(struct ieee802154_local *local)
+{
+	struct cfg802154_beacon_request *beacon_req;
+	unsigned int interval;
+
+	rcu_read_lock();
+	beacon_req = rcu_dereference(local->beacon_req);
+	if (!beacon_req) {
+		rcu_read_unlock();
+		return false;
+	}
+
+	interval = beacon_req->interval;
+	rcu_read_unlock();
+
+	if (!mac802154_is_beaconing(local))
+		return false;
+
+	return interval == IEEE802154_ACTIVE_SCAN_DURATION;
+}
+
+void mac802154_rx_mac_cmd_worker(struct work_struct *work)
+{
+	struct ieee802154_local *local =
+		container_of(work, struct ieee802154_local, rx_mac_cmd_work);
+	struct cfg802154_mac_pkt *mac_pkt;
+	u8 mac_cmd;
+	int rc;
+
+	mac_pkt = list_first_entry_or_null(&local->rx_mac_cmd_list,
+					   struct cfg802154_mac_pkt, node);
+	if (!mac_pkt)
+		return;
+
+	rc = ieee802154_get_mac_cmd(mac_pkt->skb, &mac_cmd);
+	if (rc)
+		goto out;
+
+	switch (mac_cmd) {
+	case IEEE802154_CMD_BEACON_REQ:
+		dev_dbg(&mac_pkt->sdata->dev->dev, "processing BEACON REQ\n");
+		if (!mac802154_should_answer_beacon_req(local))
+			break;
+
+		queue_delayed_work(local->mac_wq, &local->beacon_work, 0);
+		break;
+
+	case IEEE802154_CMD_ASSOCIATION_RESP:
+		dev_dbg(&mac_pkt->sdata->dev->dev, "processing ASSOC RESP\n");
+		if (!mac802154_is_associating(local))
+			break;
+
+		mac802154_process_association_resp(mac_pkt->sdata, mac_pkt->skb);
+		break;
+
+	case IEEE802154_CMD_ASSOCIATION_REQ:
+		dev_dbg(&mac_pkt->sdata->dev->dev, "processing ASSOC REQ\n");
+		if (mac_pkt->sdata->wpan_dev.iftype != NL802154_IFTYPE_COORD)
+			break;
+
+		mac802154_process_association_req(mac_pkt->sdata, mac_pkt->skb);
+		break;
+
+	case IEEE802154_CMD_DISASSOCIATION_NOTIFY:
+		dev_dbg(&mac_pkt->sdata->dev->dev, "processing DISASSOC NOTIF\n");
+		if (mac_pkt->sdata->wpan_dev.iftype != NL802154_IFTYPE_COORD)
+			break;
+
+		mac802154_process_disassociation_notif(mac_pkt->sdata, mac_pkt->skb);
+		break;
+
+	default:
+		break;
+	}
+
+out:
+	list_del(&mac_pkt->node);
+	kfree_skb(mac_pkt->skb);
+	kfree(mac_pkt);
+}
+
+static int
+ieee802154_subif_frame(struct ieee802154_sub_if_data *sdata,
+		       struct sk_buff *skb, const struct ieee802154_hdr *hdr)
+{
+	struct wpan_phy *wpan_phy = sdata->local->hw.phy;
+	struct wpan_dev *wpan_dev = &sdata->wpan_dev;
+	struct cfg802154_mac_pkt *mac_pkt;
+	__le16 span, sshort;
+	int rc;
+
+	pr_debug("getting packet via slave interface %s\n", sdata->dev->name);
+
+	span = wpan_dev->pan_id;
+	sshort = wpan_dev->short_addr;
+
+	/* Level 3 filtering: Only beacons are accepted during scans */
+	if (sdata->required_filtering == IEEE802154_FILTERING_3_SCAN &&
+	    sdata->required_filtering > wpan_phy->filtering) {
+		if (mac_cb(skb)->type != IEEE802154_FC_TYPE_BEACON) {
+			dev_dbg(&sdata->dev->dev,
+				"drop non-beacon frame (0x%x) during scan\n",
+				mac_cb(skb)->type);
+			goto fail;
+		}
+	}
+
+	switch (mac_cb(skb)->dest.mode) {
+	case IEEE802154_ADDR_NONE:
+		if (hdr->source.mode == IEEE802154_ADDR_NONE)
+			/* ACK comes with both addresses empty */
+			skb->pkt_type = PACKET_HOST;
+		else if (!wpan_dev->parent)
+			/* No dest means PAN coordinator is the recipient */
+			skb->pkt_type = PACKET_HOST;
+		else
+			/* We are not the PAN coordinator, just relaying */
+			skb->pkt_type = PACKET_OTHERHOST;
+		break;
+	case IEEE802154_ADDR_LONG:
+		if (mac_cb(skb)->dest.pan_id != span &&
+		    mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
+			skb->pkt_type = PACKET_OTHERHOST;
+		else if (mac_cb(skb)->dest.extended_addr == wpan_dev->extended_addr)
+			skb->pkt_type = PACKET_HOST;
+		else
+			skb->pkt_type = PACKET_OTHERHOST;
+		break;
+	case IEEE802154_ADDR_SHORT:
+		if (mac_cb(skb)->dest.pan_id != span &&
+		    mac_cb(skb)->dest.pan_id != cpu_to_le16(IEEE802154_PANID_BROADCAST))
+			skb->pkt_type = PACKET_OTHERHOST;
+		else if (mac_cb(skb)->dest.short_addr == sshort)
+			skb->pkt_type = PACKET_HOST;
+		else if (mac_cb(skb)->dest.short_addr ==
+			  cpu_to_le16(IEEE802154_ADDR_BROADCAST))
+			skb->pkt_type = PACKET_BROADCAST;
+		else
+			skb->pkt_type = PACKET_OTHERHOST;
+		break;
+	default:
+		pr_debug("invalid dest mode\n");
+		goto fail;
+	}
+
+	skb->dev = sdata->dev;
+
+	/* TODO this should be moved after netif_receive_skb call, otherwise
+	 * wireshark will show a mac header with security fields and the
+	 * payload is already decrypted.
+	 */
+	rc = mac802154_llsec_decrypt(&sdata->sec, skb);
+	if (rc) {
+		pr_debug("decryption failed: %i\n", rc);
+		goto fail;
+	}
+
+	sdata->dev->stats.rx_packets++;
+	sdata->dev->stats.rx_bytes += skb->len;
+
+	switch (mac_cb(skb)->type) {
+	case IEEE802154_FC_TYPE_BEACON:
+		dev_dbg(&sdata->dev->dev, "BEACON received\n");
+		if (!mac802154_is_scanning(sdata->local))
+			goto fail;
+
+		mac_pkt = kzalloc_obj(*mac_pkt, GFP_ATOMIC);
+		if (!mac_pkt)
+			goto fail;
+
+		mac_pkt->skb = skb_get(skb);
+		mac_pkt->sdata = sdata;
+		mac_pkt->page = sdata->local->scan_page;
+		mac_pkt->channel = sdata->local->scan_channel;
+		list_add_tail(&mac_pkt->node, &sdata->local->rx_beacon_list);
+		queue_work(sdata->local->mac_wq, &sdata->local->rx_beacon_work);
+		return NET_RX_SUCCESS;
+
+	case IEEE802154_FC_TYPE_MAC_CMD:
+		dev_dbg(&sdata->dev->dev, "MAC COMMAND received\n");
+		mac_pkt = kzalloc_obj(*mac_pkt, GFP_ATOMIC);
+		if (!mac_pkt)
+			goto fail;
+
+		mac_pkt->skb = skb_get(skb);
+		mac_pkt->sdata = sdata;
+		list_add_tail(&mac_pkt->node, &sdata->local->rx_mac_cmd_list);
+		queue_work(sdata->local->mac_wq, &sdata->local->rx_mac_cmd_work);
+		return NET_RX_SUCCESS;
+
+	case IEEE802154_FC_TYPE_ACK:
+		goto fail;
+
+	case IEEE802154_FC_TYPE_DATA:
+		return ieee802154_deliver_skb(skb);
+	default:
+		pr_warn_ratelimited("ieee802154: bad frame received "
+				    "(type = %d)\n", mac_cb(skb)->type);
+		goto fail;
+	}
+
+fail:
+	kfree_skb(skb);
+	return NET_RX_DROP;
+}
+
+static void
+ieee802154_print_addr(const char *name, const struct ieee802154_addr *addr)
+{
+	if (addr->mode == IEEE802154_ADDR_NONE) {
+		pr_debug("%s not present\n", name);
+		return;
+	}
+
+	pr_debug("%s PAN ID: %04x\n", name, le16_to_cpu(addr->pan_id));
+	if (addr->mode == IEEE802154_ADDR_SHORT) {
+		pr_debug("%s is short: %04x\n", name,
+			 le16_to_cpu(addr->short_addr));
+	} else {
+		u64 hw = swab64((__force u64)addr->extended_addr);
+
+		pr_debug("%s is hardware: %8phC\n", name, &hw);
+	}
+}
+
+static int
+ieee802154_parse_frame_start(struct sk_buff *skb, struct ieee802154_hdr *hdr)
+{
+	int hlen;
+	struct ieee802154_mac_cb *cb = mac_cb(skb);
+
+	skb_reset_mac_header(skb);
+
+	hlen = ieee802154_hdr_pull(skb, hdr);
+	if (hlen < 0)
+		return -EINVAL;
+
+	skb->mac_len = hlen;
+
+	pr_debug("fc: %04x dsn: %02x\n", le16_to_cpup((__le16 *)&hdr->fc),
+		 hdr->seq);
+
+	cb->type = hdr->fc.type;
+	cb->ackreq = hdr->fc.ack_request;
+	cb->secen = hdr->fc.security_enabled;
+
+	ieee802154_print_addr("destination", &hdr->dest);
+	ieee802154_print_addr("source", &hdr->source);
+
+	cb->source = hdr->source;
+	cb->dest = hdr->dest;
+
+	if (hdr->fc.security_enabled) {
+		u64 key;
+
+		pr_debug("seclevel %i\n", hdr->sec.level);
+
+		switch (hdr->sec.key_id_mode) {
+		case IEEE802154_SCF_KEY_IMPLICIT:
+			pr_debug("implicit key\n");
+			break;
+
+		case IEEE802154_SCF_KEY_INDEX:
+			pr_debug("key %02x\n", hdr->sec.key_id);
+			break;
+
+		case IEEE802154_SCF_KEY_SHORT_INDEX:
+			pr_debug("key %04x:%04x %02x\n",
+				 le32_to_cpu(hdr->sec.short_src) >> 16,
+				 le32_to_cpu(hdr->sec.short_src) & 0xffff,
+				 hdr->sec.key_id);
+			break;
+
+		case IEEE802154_SCF_KEY_HW_INDEX:
+			key = swab64((__force u64)hdr->sec.extended_src);
+			pr_debug("key source %8phC %02x\n", &key,
+				 hdr->sec.key_id);
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static void
+__ieee802154_rx_handle_packet(struct ieee802154_local *local,
+			      struct sk_buff *skb)
+{
+	int ret;
+	struct ieee802154_sub_if_data *sdata;
+	struct ieee802154_hdr hdr;
+	struct sk_buff *skb2;
+
+	ret = ieee802154_parse_frame_start(skb, &hdr);
+	if (ret) {
+		pr_debug("got invalid frame\n");
+		return;
+	}
+
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		if (sdata->wpan_dev.iftype == NL802154_IFTYPE_MONITOR)
+			continue;
+
+		if (!ieee802154_sdata_running(sdata))
+			continue;
+
+		/* Do not deliver packets received on interfaces expecting
+		 * AACK=1 if the address filters where disabled.
+		 */
+		if (local->hw.phy->filtering < IEEE802154_FILTERING_4_FRAME_FIELDS &&
+		    sdata->required_filtering == IEEE802154_FILTERING_4_FRAME_FIELDS)
+			continue;
+
+		skb2 = skb_clone(skb, GFP_ATOMIC);
+		if (skb2) {
+			skb2->dev = sdata->dev;
+			ieee802154_subif_frame(sdata, skb2, &hdr);
+		}
+	}
+}
+
+static void
+ieee802154_monitors_rx(struct ieee802154_local *local, struct sk_buff *skb)
+{
+	struct sk_buff *skb2;
+	struct ieee802154_sub_if_data *sdata;
+
+	skb_reset_mac_header(skb);
+	skb->ip_summed = CHECKSUM_UNNECESSARY;
+	skb->pkt_type = PACKET_OTHERHOST;
+	skb->protocol = htons(ETH_P_IEEE802154);
+
+	list_for_each_entry_rcu(sdata, &local->interfaces, list) {
+		if (sdata->wpan_dev.iftype != NL802154_IFTYPE_MONITOR)
+			continue;
+
+		if (!ieee802154_sdata_running(sdata))
+			continue;
+
+		skb2 = skb_clone(skb, GFP_ATOMIC);
+		if (skb2) {
+			skb2->dev = sdata->dev;
+			ieee802154_deliver_skb(skb2);
+
+			sdata->dev->stats.rx_packets++;
+			sdata->dev->stats.rx_bytes += skb->len;
+		}
+	}
+}
+
+void ieee802154_rx(struct ieee802154_local *local, struct sk_buff *skb)
+{
+	u16 crc;
+
+	WARN_ON_ONCE(softirq_count() == 0);
+
+	if (local->suspended)
+		goto free_skb;
+
+	/* TODO: When a transceiver omits the checksum here, we
+	 * add an own calculated one. This is currently an ugly
+	 * solution because the monitor needs a crc here.
+	 */
+	if (local->hw.flags & IEEE802154_HW_RX_OMIT_CKSUM) {
+		crc = crc_ccitt(0, skb->data, skb->len);
+		put_unaligned_le16(crc, skb_put(skb, 2));
+	}
+
+	rcu_read_lock();
+
+	ieee802154_monitors_rx(local, skb);
+
+	/* Level 1 filtering: Check the FCS by software when relevant */
+	if (local->hw.phy->filtering == IEEE802154_FILTERING_NONE) {
+		crc = crc_ccitt(0, skb->data, skb->len);
+		if (crc)
+			goto drop;
+	}
+	/* remove crc */
+	skb_trim(skb, skb->len - 2);
+
+	__ieee802154_rx_handle_packet(local, skb);
+
+drop:
+	rcu_read_unlock();
+free_skb:
+	kfree_skb(skb);
+}
+
+void
+ieee802154_rx_irqsafe(struct ieee802154_hw *hw, struct sk_buff *skb, u8 lqi)
+{
+	struct ieee802154_local *local = hw_to_local(hw);
+	struct ieee802154_mac_cb *cb = mac_cb_init(skb);
+
+	cb->lqi = lqi;
+	skb->pkt_type = IEEE802154_RX_MSG;
+	skb_queue_tail(&local->skb_queue, skb);
+	tasklet_schedule(&local->tasklet);
+}
+EXPORT_SYMBOL(ieee802154_rx_irqsafe);