Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/ker…

…nel/git/bluetooth/bluetooth-next

Johan Hedberg says:

====================
pull request: bluetooth-next 2016-12-08

I didn't miss your "net-next is closed" email, but it did come as a bit
of a surprise, and due to time-zone differences I didn't have a chance
to react to it until now. We would have had a couple of patches in
bluetooth-next that we'd still have wanted to get to 4.10.

Out of these the most critical one is the H7/CT2 patch for Bluetooth
Security Manager Protocol, something that couldn't be published before
the Bluetooth 5.0 specification went public (yesterday). If these really
can't go to net-next we'll likely be sending at least this patch through
bluetooth.git to net.git for rc1 inclusion.
====================

Signed-off-by: David S. Miller <[email protected]>

drivers/bluetooth/btmrvl_drv.h

@@ -32,7 +32,6 @@
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
-#include <linux/slab.h>
 #include <linux/of_irq.h>
 
 #define BTM_HEADER_LEN			4

drivers/net/ieee802154/atusb.c

@@ -58,6 +58,11 @@ struct atusb {
 	struct urb *tx_urb;
 	struct sk_buff *tx_skb;
 	uint8_t tx_ack_seq;		/* current TX ACK sequence number */
+
+	/* Firmware variable */
+	unsigned char fw_ver_maj;	/* Firmware major version number */
+	unsigned char fw_ver_min;	/* Firmware minor version number */
+	unsigned char fw_hw_type;	/* Firmware hardware type */
 };
 
 /* ----- USB commands without data ----------------------------------------- */
@@ -540,6 +545,21 @@ atusb_set_csma_params(struct ieee802154_hw *hw, u8 min_be, u8 max_be, u8 retries
 	return atusb_write_subreg(atusb, SR_MAX_CSMA_RETRIES, retries);
 }
 
+static int
+atusb_set_frame_retries(struct ieee802154_hw *hw, s8 retries)
+{
+	struct atusb *atusb = hw->priv;
+	struct device *dev = &atusb->usb_dev->dev;
+
+	if (atusb->fw_ver_maj == 0 && atusb->fw_ver_min < 3) {
+		dev_info(dev, "Automatic frame retransmission is only available from "
+			"firmware version 0.3. Please update if you want this feature.");
+		return -EINVAL;
+	}
+
+	return atusb_write_subreg(atusb, SR_MAX_FRAME_RETRIES, retries);
+}
+
 static int
 atusb_set_promiscuous_mode(struct ieee802154_hw *hw, const bool on)
 {
@@ -579,6 +599,7 @@ static const struct ieee802154_ops atusb_ops = {
 	.set_cca_mode		= atusb_set_cca_mode,
 	.set_cca_ed_level	= atusb_set_cca_ed_level,
 	.set_csma_params	= atusb_set_csma_params,
+	.set_frame_retries	= atusb_set_frame_retries,
 	.set_promiscuous_mode	= atusb_set_promiscuous_mode,
 };
 
@@ -594,14 +615,19 @@ static int atusb_get_and_show_revision(struct atusb *atusb)
 	ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0),
 				ATUSB_ID, ATUSB_REQ_FROM_DEV, 0, 0,
 				buffer, 3, 1000);
-	if (ret >= 0)
+	if (ret >= 0) {
+		atusb->fw_ver_maj = buffer[0];
+		atusb->fw_ver_min = buffer[1];
+		atusb->fw_hw_type = buffer[2];
+
 		dev_info(&usb_dev->dev,
 			 "Firmware: major: %u, minor: %u, hardware type: %u\n",
-			 buffer[0], buffer[1], buffer[2]);
-	if (buffer[0] == 0 && buffer[1] < 2) {
+			 atusb->fw_ver_maj, atusb->fw_ver_min, atusb->fw_hw_type);
+	}
+	if (atusb->fw_ver_maj == 0 && atusb->fw_ver_min < 2) {
 		dev_info(&usb_dev->dev,
-			 "Firmware version (%u.%u) is predates our first public release.",
-			 buffer[0], buffer[1]);
+			 "Firmware version (%u.%u) predates our first public release.",
+			 atusb->fw_ver_maj, atusb->fw_ver_min);
 		dev_info(&usb_dev->dev, "Please update to version 0.2 or newer");
 	}
 
@@ -669,6 +695,43 @@ static int atusb_get_and_show_chip(struct atusb *atusb)
 	return -ENODEV;
 }
 
+static int atusb_set_extended_addr(struct atusb *atusb)
+{
+	struct usb_device *usb_dev = atusb->usb_dev;
+	unsigned char buffer[IEEE802154_EXTENDED_ADDR_LEN];
+	__le64 extended_addr;
+	u64 addr;
+	int ret;
+
+	/* Firmware versions before 0.3 do not support the EUI64_READ command.
+	 * Just use a random address and be done */
+	if (atusb->fw_ver_maj == 0 && atusb->fw_ver_min < 3) {
+		ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
+		return 0;
+	}
+
+	/* Firmware is new enough so we fetch the address from EEPROM */
+	ret = atusb_control_msg(atusb, usb_rcvctrlpipe(usb_dev, 0),
+				ATUSB_EUI64_READ, ATUSB_REQ_FROM_DEV, 0, 0,
+				buffer, IEEE802154_EXTENDED_ADDR_LEN, 1000);
+	if (ret < 0)
+		dev_err(&usb_dev->dev, "failed to fetch extended address\n");
+
+	memcpy(&extended_addr, buffer, IEEE802154_EXTENDED_ADDR_LEN);
+	/* Check if read address is not empty and the unicast bit is set correctly */
+	if (!ieee802154_is_valid_extended_unicast_addr(extended_addr)) {
+		dev_info(&usb_dev->dev, "no permanent extended address found, random address set\n");
+		ieee802154_random_extended_addr(&atusb->hw->phy->perm_extended_addr);
+	} else {
+		atusb->hw->phy->perm_extended_addr = extended_addr;
+		addr = swab64((__force u64)atusb->hw->phy->perm_extended_addr);
+		dev_info(&usb_dev->dev, "Read permanent extended address %8phC from device\n",
+			&addr);
+	}
+
+	return ret;
+}
+
 /* ----- Setup ------------------------------------------------------------- */
 
 static int atusb_probe(struct usb_interface *interface,
@@ -707,7 +770,8 @@ static int atusb_probe(struct usb_interface *interface,
 
 	hw->parent = &usb_dev->dev;
 	hw->flags = IEEE802154_HW_TX_OMIT_CKSUM | IEEE802154_HW_AFILT |
-		    IEEE802154_HW_PROMISCUOUS | IEEE802154_HW_CSMA_PARAMS;
+		    IEEE802154_HW_PROMISCUOUS | IEEE802154_HW_CSMA_PARAMS |
+		    IEEE802154_HW_FRAME_RETRIES;
 
 	hw->phy->flags = WPAN_PHY_FLAG_TXPOWER | WPAN_PHY_FLAG_CCA_ED_LEVEL |
 			 WPAN_PHY_FLAG_CCA_MODE;
@@ -728,13 +792,14 @@ static int atusb_probe(struct usb_interface *interface,
 	hw->phy->supported.tx_powers = atusb_powers;
 	hw->phy->supported.tx_powers_size = ARRAY_SIZE(atusb_powers);
 	hw->phy->transmit_power = hw->phy->supported.tx_powers[0];
-	ieee802154_random_extended_addr(&hw->phy->perm_extended_addr);
 	hw->phy->cca_ed_level = hw->phy->supported.cca_ed_levels[7];
 
 	atusb_command(atusb, ATUSB_RF_RESET, 0);
 	atusb_get_and_show_chip(atusb);
 	atusb_get_and_show_revision(atusb);
 	atusb_get_and_show_build(atusb);
+	atusb_set_extended_addr(atusb);
+
 	ret = atusb_get_and_clear_error(atusb);
 	if (ret) {
 		dev_err(&atusb->usb_dev->dev,

drivers/net/ieee802154/atusb.h

@@ -13,8 +13,8 @@
  * Firmware: ben-wpan/atusb/fw/include/atusb/atusb.h
  */
 
-#ifndef _ATUSB_H
-#define _ATUSB_H
+#ifndef	_ATUSB_H
+#define	_ATUSB_H
 
 #define ATUSB_VENDOR_ID	0x20b7	/* Qi Hardware*/
 #define ATUSB_PRODUCT_ID 0x1540	/* 802.15.4, device 0 */
@@ -46,9 +46,12 @@ enum atusb_requests {
 	ATUSB_SPI_WRITE2_SYNC,
 	ATUSB_RX_MODE			= 0x40, /* HardMAC group */
 	ATUSB_TX,
+	ATUSB_EUI64_WRITE		= 0x50, /* Parameter in EEPROM grp */
+	ATUSB_EUI64_READ,
 };
 
-/* Direction	bRequest		wValue		wIndex	wLength
+/*
+ * Direction	bRequest		wValue		wIndex	wLength
  *
  * ->host	ATUSB_ID		-		-	3
  * ->host	ATUSB_BUILD		-		-	#bytes
@@ -76,6 +79,8 @@ enum atusb_requests {
  *
  * host->	ATUSB_RX_MODE		on		-	0
  * host->	ATUSB_TX		flags		ack_seq	#bytes
+ * host->	ATUSB_EUI64_WRITE	-		-	#bytes (8)
+ * ->host	ATUSB_EUI64_READ	-		-	#bytes (8)
  */
 
 #define ATUSB_REQ_FROM_DEV	(USB_TYPE_VENDOR | USB_DIR_IN)

net/bluetooth/smp.c

@@ -57,7 +57,7 @@
 #define SMP_TIMEOUT	msecs_to_jiffies(30000)
 
 #define AUTH_REQ_MASK(dev)	(hci_dev_test_flag(dev, HCI_SC_ENABLED) ? \
-				 0x1f : 0x07)
+				 0x3f : 0x07)
 #define KEY_DIST_MASK		0x07
 
 /* Maximum message length that can be passed to aes_cmac */
@@ -76,6 +76,7 @@ enum {
 	SMP_FLAG_DHKEY_PENDING,
 	SMP_FLAG_REMOTE_OOB,
 	SMP_FLAG_LOCAL_OOB,
+	SMP_FLAG_CT2,
 };
 
 struct smp_dev {
@@ -357,6 +358,22 @@ static int smp_h6(struct crypto_shash *tfm_cmac, const u8 w[16],
 	return err;
 }
 
+static int smp_h7(struct crypto_shash *tfm_cmac, const u8 w[16],
+		  const u8 salt[16], u8 res[16])
+{
+	int err;
+
+	SMP_DBG("w %16phN salt %16phN", w, salt);
+
+	err = aes_cmac(tfm_cmac, salt, w, 16, res);
+	if (err)
+		return err;
+
+	SMP_DBG("res %16phN", res);
+
+	return err;
+}
+
 /* The following functions map to the legacy SMP crypto functions e, c1,
  * s1 and ah.
  */
@@ -1130,20 +1147,31 @@ static void sc_add_ltk(struct smp_chan *smp)
 
 static void sc_generate_link_key(struct smp_chan *smp)
 {
-	/* These constants are as specified in the core specification.
-	 * In ASCII they spell out to 'tmp1' and 'lebr'.
-	 */
-	const u8 tmp1[4] = { 0x31, 0x70, 0x6d, 0x74 };
+	/* From core spec. Spells out in ASCII as 'lebr'. */
 	const u8 lebr[4] = { 0x72, 0x62, 0x65, 0x6c };
 
 	smp->link_key = kzalloc(16, GFP_KERNEL);
 	if (!smp->link_key)
 		return;
 
-	if (smp_h6(smp->tfm_cmac, smp->tk, tmp1, smp->link_key)) {
-		kzfree(smp->link_key);
-		smp->link_key = NULL;
-		return;
+	if (test_bit(SMP_FLAG_CT2, &smp->flags)) {
+		/* SALT = 0x00000000000000000000000000000000746D7031 */
+		const u8 salt[16] = { 0x31, 0x70, 0x6d, 0x74 };
+
+		if (smp_h7(smp->tfm_cmac, smp->tk, salt, smp->link_key)) {
+			kzfree(smp->link_key);
+			smp->link_key = NULL;
+			return;
+		}
+	} else {
+		/* From core spec. Spells out in ASCII as 'tmp1'. */
+		const u8 tmp1[4] = { 0x31, 0x70, 0x6d, 0x74 };
+
+		if (smp_h6(smp->tfm_cmac, smp->tk, tmp1, smp->link_key)) {
+			kzfree(smp->link_key);
+			smp->link_key = NULL;
+			return;
+		}
 	}
 
 	if (smp_h6(smp->tfm_cmac, smp->link_key, lebr, smp->link_key)) {
@@ -1169,10 +1197,7 @@ static void smp_allow_key_dist(struct smp_chan *smp)
 
 static void sc_generate_ltk(struct smp_chan *smp)
 {
-	/* These constants are as specified in the core specification.
-	 * In ASCII they spell out to 'tmp2' and 'brle'.
-	 */
-	const u8 tmp2[4] = { 0x32, 0x70, 0x6d, 0x74 };
+	/* From core spec. Spells out in ASCII as 'brle'. */
 	const u8 brle[4] = { 0x65, 0x6c, 0x72, 0x62 };
 	struct hci_conn *hcon = smp->conn->hcon;
 	struct hci_dev *hdev = hcon->hdev;
@@ -1187,8 +1212,19 @@ static void sc_generate_ltk(struct smp_chan *smp)
 	if (key->type == HCI_LK_DEBUG_COMBINATION)
 		set_bit(SMP_FLAG_DEBUG_KEY, &smp->flags);
 
-	if (smp_h6(smp->tfm_cmac, key->val, tmp2, smp->tk))
-		return;
+	if (test_bit(SMP_FLAG_CT2, &smp->flags)) {
+		/* SALT = 0x00000000000000000000000000000000746D7032 */
+		const u8 salt[16] = { 0x32, 0x70, 0x6d, 0x74 };
+
+		if (smp_h7(smp->tfm_cmac, key->val, salt, smp->tk))
+			return;
+	} else {
+		/* From core spec. Spells out in ASCII as 'tmp2'. */
+		const u8 tmp2[4] = { 0x32, 0x70, 0x6d, 0x74 };
+
+		if (smp_h6(smp->tfm_cmac, key->val, tmp2, smp->tk))
+			return;
+	}
 
 	if (smp_h6(smp->tfm_cmac, smp->tk, brle, smp->tk))
 		return;
@@ -1669,6 +1705,7 @@ static void build_bredr_pairing_cmd(struct smp_chan *smp,
 	if (!rsp) {
 		memset(req, 0, sizeof(*req));
 
+		req->auth_req        = SMP_AUTH_CT2;
 		req->init_key_dist   = local_dist;
 		req->resp_key_dist   = remote_dist;
 		req->max_key_size    = conn->hcon->enc_key_size;
@@ -1680,6 +1717,7 @@ static void build_bredr_pairing_cmd(struct smp_chan *smp,
 
 	memset(rsp, 0, sizeof(*rsp));
 
+	rsp->auth_req        = SMP_AUTH_CT2;
 	rsp->max_key_size    = conn->hcon->enc_key_size;
 	rsp->init_key_dist   = req->init_key_dist & remote_dist;
 	rsp->resp_key_dist   = req->resp_key_dist & local_dist;
@@ -1744,6 +1782,9 @@ static u8 smp_cmd_pairing_req(struct l2cap_conn *conn, struct sk_buff *skb)
 
 		build_bredr_pairing_cmd(smp, req, &rsp);
 
+		if (req->auth_req & SMP_AUTH_CT2)
+			set_bit(SMP_FLAG_CT2, &smp->flags);
+
 		key_size = min(req->max_key_size, rsp.max_key_size);
 		if (check_enc_key_size(conn, key_size))
 			return SMP_ENC_KEY_SIZE;
@@ -1761,9 +1802,13 @@ static u8 smp_cmd_pairing_req(struct l2cap_conn *conn, struct sk_buff *skb)
 
 	build_pairing_cmd(conn, req, &rsp, auth);
 
-	if (rsp.auth_req & SMP_AUTH_SC)
+	if (rsp.auth_req & SMP_AUTH_SC) {
 		set_bit(SMP_FLAG_SC, &smp->flags);
 
+		if (rsp.auth_req & SMP_AUTH_CT2)
+			set_bit(SMP_FLAG_CT2, &smp->flags);
+	}
+
 	if (conn->hcon->io_capability == HCI_IO_NO_INPUT_OUTPUT)
 		sec_level = BT_SECURITY_MEDIUM;
 	else
@@ -1917,6 +1962,9 @@ static u8 smp_cmd_pairing_rsp(struct l2cap_conn *conn, struct sk_buff *skb)
 	 */
 	smp->remote_key_dist &= rsp->resp_key_dist;
 
+	if ((req->auth_req & SMP_AUTH_CT2) && (auth & SMP_AUTH_CT2))
+		set_bit(SMP_FLAG_CT2, &smp->flags);
+
 	/* For BR/EDR this means we're done and can start phase 3 */
 	if (conn->hcon->type == ACL_LINK) {
 		/* Clear bits which are generated but not distributed */
@@ -2312,8 +2360,11 @@ int smp_conn_security(struct hci_conn *hcon, __u8 sec_level)
 
 	authreq = seclevel_to_authreq(sec_level);
 
-	if (hci_dev_test_flag(hcon->hdev, HCI_SC_ENABLED))
+	if (hci_dev_test_flag(hcon->hdev, HCI_SC_ENABLED)) {
 		authreq |= SMP_AUTH_SC;
+		if (hci_dev_test_flag(hcon->hdev, HCI_SSP_ENABLED))
+			authreq |= SMP_AUTH_CT2;
+	}
 
 	/* Require MITM if IO Capability allows or the security level
 	 * requires it.

net/bluetooth/smp.h

@@ -57,6 +57,7 @@ struct smp_cmd_pairing {
 #define SMP_AUTH_MITM		0x04
 #define SMP_AUTH_SC		0x08
 #define SMP_AUTH_KEYPRESS	0x10
+#define SMP_AUTH_CT2		0x20
 
 #define SMP_CMD_PAIRING_CONFIRM	0x03
 struct smp_cmd_pairing_confirm {