Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
Conflicts:
net/nfc/netlink.c
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/nfc/core.c b/net/nfc/core.c
index ff74979..c9eacc1 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -679,7 +679,7 @@
if (dev->ops->check_presence) {
del_timer_sync(&dev->check_pres_timer);
- destroy_workqueue(dev->check_pres_wq);
+ cancel_work_sync(&dev->check_pres_work);
}
nfc_genl_data_exit(&dev->genl_data);
@@ -715,7 +715,7 @@
{
struct nfc_dev *dev = (struct nfc_dev *)data;
- queue_work(dev->check_pres_wq, &dev->check_pres_work);
+ queue_work(system_nrt_wq, &dev->check_pres_work);
}
struct class nfc_class = {
@@ -784,20 +784,11 @@
dev->targets_generation = 1;
if (ops->check_presence) {
- char name[32];
init_timer(&dev->check_pres_timer);
dev->check_pres_timer.data = (unsigned long)dev;
dev->check_pres_timer.function = nfc_check_pres_timeout;
INIT_WORK(&dev->check_pres_work, nfc_check_pres_work);
- snprintf(name, sizeof(name), "nfc%d_check_pres_wq", dev->idx);
- dev->check_pres_wq = alloc_workqueue(name, WQ_NON_REENTRANT |
- WQ_UNBOUND |
- WQ_MEM_RECLAIM, 1);
- if (dev->check_pres_wq == NULL) {
- kfree(dev);
- return NULL;
- }
}
return dev;
diff --git a/net/nfc/hci/Makefile b/net/nfc/hci/Makefile
index f9c44b2..c5dbb68 100644
--- a/net/nfc/hci/Makefile
+++ b/net/nfc/hci/Makefile
@@ -4,5 +4,5 @@
obj-$(CONFIG_NFC_HCI) += hci.o
-hci-y := core.o hcp.o command.o
-hci-$(CONFIG_NFC_SHDLC) += shdlc.o
+hci-y := core.o hcp.o command.o llc.o llc_nop.o
+hci-$(CONFIG_NFC_SHDLC) += llc_shdlc.o
diff --git a/net/nfc/hci/command.c b/net/nfc/hci/command.c
index 46362ef..71c6a70 100644
--- a/net/nfc/hci/command.c
+++ b/net/nfc/hci/command.c
@@ -28,10 +28,29 @@
#include "hci.h"
-static void nfc_hci_execute_cb(struct nfc_hci_dev *hdev, int err,
- struct sk_buff *skb, void *cb_data)
+static int nfc_hci_execute_cmd_async(struct nfc_hci_dev *hdev, u8 pipe, u8 cmd,
+ const u8 *param, size_t param_len,
+ data_exchange_cb_t cb, void *cb_context)
{
- struct hcp_exec_waiter *hcp_ew = (struct hcp_exec_waiter *)cb_data;
+ pr_debug("exec cmd async through pipe=%d, cmd=%d, plen=%zd\n", pipe,
+ cmd, param_len);
+
+ /* TODO: Define hci cmd execution delay. Should it be the same
+ * for all commands?
+ */
+ return nfc_hci_hcp_message_tx(hdev, pipe, NFC_HCI_HCP_COMMAND, cmd,
+ param, param_len, cb, cb_context, 3000);
+}
+
+/*
+ * HCI command execution completion callback.
+ * err will be a standard linux error (may be converted from HCI response)
+ * skb contains the response data and must be disposed, or may be NULL if
+ * an error occured
+ */
+static void nfc_hci_execute_cb(void *context, struct sk_buff *skb, int err)
+{
+ struct hcp_exec_waiter *hcp_ew = (struct hcp_exec_waiter *)context;
pr_debug("HCI Cmd completed with result=%d\n", err);
@@ -55,7 +74,8 @@
hcp_ew.exec_complete = false;
hcp_ew.result_skb = NULL;
- pr_debug("through pipe=%d, cmd=%d, plen=%zd\n", pipe, cmd, param_len);
+ pr_debug("exec cmd sync through pipe=%d, cmd=%d, plen=%zd\n", pipe,
+ cmd, param_len);
/* TODO: Define hci cmd execution delay. Should it be the same
* for all commands?
@@ -133,6 +153,23 @@
}
EXPORT_SYMBOL(nfc_hci_send_cmd);
+int nfc_hci_send_cmd_async(struct nfc_hci_dev *hdev, u8 gate, u8 cmd,
+ const u8 *param, size_t param_len,
+ data_exchange_cb_t cb, void *cb_context)
+{
+ u8 pipe;
+
+ pr_debug("\n");
+
+ pipe = hdev->gate2pipe[gate];
+ if (pipe == NFC_HCI_INVALID_PIPE)
+ return -EADDRNOTAVAIL;
+
+ return nfc_hci_execute_cmd_async(hdev, pipe, cmd, param, param_len,
+ cb, cb_context);
+}
+EXPORT_SYMBOL(nfc_hci_send_cmd_async);
+
int nfc_hci_set_param(struct nfc_hci_dev *hdev, u8 gate, u8 idx,
const u8 *param, size_t param_len)
{
diff --git a/net/nfc/hci/core.c b/net/nfc/hci/core.c
index 1ac7b3f..d378d93 100644
--- a/net/nfc/hci/core.c
+++ b/net/nfc/hci/core.c
@@ -26,6 +26,7 @@
#include <net/nfc/nfc.h>
#include <net/nfc/hci.h>
+#include <net/nfc/llc.h>
#include "hci.h"
@@ -57,12 +58,11 @@
if (hdev->cmd_pending_msg) {
if (timer_pending(&hdev->cmd_timer) == 0) {
if (hdev->cmd_pending_msg->cb)
- hdev->cmd_pending_msg->cb(hdev,
- -ETIME,
- NULL,
- hdev->
+ hdev->cmd_pending_msg->cb(hdev->
cmd_pending_msg->
- cb_context);
+ cb_context,
+ NULL,
+ -ETIME);
kfree(hdev->cmd_pending_msg);
hdev->cmd_pending_msg = NULL;
} else
@@ -78,12 +78,12 @@
pr_debug("msg_tx_queue has a cmd to send\n");
while ((skb = skb_dequeue(&msg->msg_frags)) != NULL) {
- r = hdev->ops->xmit(hdev, skb);
+ r = nfc_llc_xmit_from_hci(hdev->llc, skb);
if (r < 0) {
kfree_skb(skb);
skb_queue_purge(&msg->msg_frags);
if (msg->cb)
- msg->cb(hdev, r, NULL, msg->cb_context);
+ msg->cb(msg->cb_context, NULL, r);
kfree(msg);
break;
}
@@ -133,15 +133,15 @@
del_timer_sync(&hdev->cmd_timer);
if (hdev->cmd_pending_msg->cb)
- hdev->cmd_pending_msg->cb(hdev, err, skb,
- hdev->cmd_pending_msg->cb_context);
+ hdev->cmd_pending_msg->cb(hdev->cmd_pending_msg->cb_context,
+ skb, err);
else
kfree_skb(skb);
kfree(hdev->cmd_pending_msg);
hdev->cmd_pending_msg = NULL;
- queue_work(hdev->msg_tx_wq, &hdev->msg_tx_work);
+ queue_work(system_nrt_wq, &hdev->msg_tx_work);
}
void nfc_hci_resp_received(struct nfc_hci_dev *hdev, u8 result,
@@ -326,7 +326,7 @@
{
struct nfc_hci_dev *hdev = (struct nfc_hci_dev *)data;
- queue_work(hdev->msg_tx_wq, &hdev->msg_tx_work);
+ queue_work(system_nrt_wq, &hdev->msg_tx_work);
}
static int hci_dev_connect_gates(struct nfc_hci_dev *hdev, u8 gate_count,
@@ -398,8 +398,7 @@
nfc_hci_disconnect_all_gates(hdev);
exit:
- if (skb)
- kfree_skb(skb);
+ kfree_skb(skb);
return r;
}
@@ -470,29 +469,38 @@
return r;
}
+ r = nfc_llc_start(hdev->llc);
+ if (r < 0)
+ goto exit_close;
+
r = hci_dev_session_init(hdev);
if (r < 0)
- goto exit;
+ goto exit_llc;
r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
NFC_HCI_EVT_END_OPERATION, NULL, 0);
if (r < 0)
- goto exit;
+ goto exit_llc;
if (hdev->ops->hci_ready) {
r = hdev->ops->hci_ready(hdev);
if (r < 0)
- goto exit;
+ goto exit_llc;
}
r = hci_dev_version(hdev);
if (r < 0)
- goto exit;
+ goto exit_llc;
-exit:
- if (r < 0)
- if (hdev->ops->close)
- hdev->ops->close(hdev);
+ return 0;
+
+exit_llc:
+ nfc_llc_stop(hdev->llc);
+
+exit_close:
+ if (hdev->ops->close)
+ hdev->ops->close(hdev);
+
return r;
}
@@ -500,6 +508,8 @@
{
struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
+ nfc_llc_stop(hdev->llc);
+
if (hdev->ops->close)
hdev->ops->close(hdev);
@@ -539,13 +549,37 @@
{
}
+#define HCI_CB_TYPE_TRANSCEIVE 1
+
+static void hci_transceive_cb(void *context, struct sk_buff *skb, int err)
+{
+ struct nfc_hci_dev *hdev = context;
+
+ switch (hdev->async_cb_type) {
+ case HCI_CB_TYPE_TRANSCEIVE:
+ /*
+ * TODO: Check RF Error indicator to make sure data is valid.
+ * It seems that HCI cmd can complete without error, but data
+ * can be invalid if an RF error occured? Ignore for now.
+ */
+ if (err == 0)
+ skb_trim(skb, skb->len - 1); /* RF Err ind */
+
+ hdev->async_cb(hdev->async_cb_context, skb, err);
+ break;
+ default:
+ if (err == 0)
+ kfree_skb(skb);
+ break;
+ }
+}
+
static int hci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
struct sk_buff *skb, data_exchange_cb_t cb,
void *cb_context)
{
struct nfc_hci_dev *hdev = nfc_get_drvdata(nfc_dev);
int r;
- struct sk_buff *res_skb = NULL;
pr_debug("target_idx=%d\n", target->idx);
@@ -553,40 +587,37 @@
case NFC_HCI_RF_READER_A_GATE:
case NFC_HCI_RF_READER_B_GATE:
if (hdev->ops->data_exchange) {
- r = hdev->ops->data_exchange(hdev, target, skb,
- &res_skb);
+ r = hdev->ops->data_exchange(hdev, target, skb, cb,
+ cb_context);
if (r <= 0) /* handled */
break;
}
*skb_push(skb, 1) = 0; /* CTR, see spec:10.2.2.1 */
- r = nfc_hci_send_cmd(hdev, target->hci_reader_gate,
- NFC_HCI_WR_XCHG_DATA,
- skb->data, skb->len, &res_skb);
- /*
- * TODO: Check RF Error indicator to make sure data is valid.
- * It seems that HCI cmd can complete without error, but data
- * can be invalid if an RF error occured? Ignore for now.
- */
- if (r == 0)
- skb_trim(res_skb, res_skb->len - 1); /* RF Err ind */
+
+ hdev->async_cb_type = HCI_CB_TYPE_TRANSCEIVE;
+ hdev->async_cb = cb;
+ hdev->async_cb_context = cb_context;
+
+ r = nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
+ NFC_HCI_WR_XCHG_DATA, skb->data,
+ skb->len, hci_transceive_cb, hdev);
break;
default:
if (hdev->ops->data_exchange) {
- r = hdev->ops->data_exchange(hdev, target, skb,
- &res_skb);
+ r = hdev->ops->data_exchange(hdev, target, skb, cb,
+ cb_context);
if (r == 1)
r = -ENOTSUPP;
}
else
r = -ENOTSUPP;
+ break;
}
kfree_skb(skb);
- cb(cb_context, res_skb, r);
-
- return 0;
+ return r;
}
static int hci_check_presence(struct nfc_dev *nfc_dev,
@@ -600,149 +631,6 @@
return 0;
}
-static struct nfc_ops hci_nfc_ops = {
- .dev_up = hci_dev_up,
- .dev_down = hci_dev_down,
- .start_poll = hci_start_poll,
- .stop_poll = hci_stop_poll,
- .activate_target = hci_activate_target,
- .deactivate_target = hci_deactivate_target,
- .im_transceive = hci_transceive,
- .check_presence = hci_check_presence,
-};
-
-struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
- struct nfc_hci_init_data *init_data,
- u32 protocols,
- int tx_headroom,
- int tx_tailroom,
- int max_link_payload)
-{
- struct nfc_hci_dev *hdev;
-
- if (ops->xmit == NULL)
- return NULL;
-
- if (protocols == 0)
- return NULL;
-
- hdev = kzalloc(sizeof(struct nfc_hci_dev), GFP_KERNEL);
- if (hdev == NULL)
- return NULL;
-
- hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols,
- tx_headroom + HCI_CMDS_HEADROOM,
- tx_tailroom);
- if (!hdev->ndev) {
- kfree(hdev);
- return NULL;
- }
-
- hdev->ops = ops;
- hdev->max_data_link_payload = max_link_payload;
- hdev->init_data = *init_data;
-
- nfc_set_drvdata(hdev->ndev, hdev);
-
- memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
-
- return hdev;
-}
-EXPORT_SYMBOL(nfc_hci_allocate_device);
-
-void nfc_hci_free_device(struct nfc_hci_dev *hdev)
-{
- nfc_free_device(hdev->ndev);
- kfree(hdev);
-}
-EXPORT_SYMBOL(nfc_hci_free_device);
-
-int nfc_hci_register_device(struct nfc_hci_dev *hdev)
-{
- struct device *dev = &hdev->ndev->dev;
- const char *devname = dev_name(dev);
- char name[32];
- int r = 0;
-
- mutex_init(&hdev->msg_tx_mutex);
-
- INIT_LIST_HEAD(&hdev->msg_tx_queue);
-
- INIT_WORK(&hdev->msg_tx_work, nfc_hci_msg_tx_work);
- snprintf(name, sizeof(name), "%s_hci_msg_tx_wq", devname);
- hdev->msg_tx_wq = alloc_workqueue(name, WQ_NON_REENTRANT | WQ_UNBOUND |
- WQ_MEM_RECLAIM, 1);
- if (hdev->msg_tx_wq == NULL) {
- r = -ENOMEM;
- goto exit;
- }
-
- init_timer(&hdev->cmd_timer);
- hdev->cmd_timer.data = (unsigned long)hdev;
- hdev->cmd_timer.function = nfc_hci_cmd_timeout;
-
- skb_queue_head_init(&hdev->rx_hcp_frags);
-
- INIT_WORK(&hdev->msg_rx_work, nfc_hci_msg_rx_work);
- snprintf(name, sizeof(name), "%s_hci_msg_rx_wq", devname);
- hdev->msg_rx_wq = alloc_workqueue(name, WQ_NON_REENTRANT | WQ_UNBOUND |
- WQ_MEM_RECLAIM, 1);
- if (hdev->msg_rx_wq == NULL) {
- r = -ENOMEM;
- goto exit;
- }
-
- skb_queue_head_init(&hdev->msg_rx_queue);
-
- r = nfc_register_device(hdev->ndev);
-
-exit:
- if (r < 0) {
- if (hdev->msg_tx_wq)
- destroy_workqueue(hdev->msg_tx_wq);
- if (hdev->msg_rx_wq)
- destroy_workqueue(hdev->msg_rx_wq);
- }
-
- return r;
-}
-EXPORT_SYMBOL(nfc_hci_register_device);
-
-void nfc_hci_unregister_device(struct nfc_hci_dev *hdev)
-{
- struct hci_msg *msg, *n;
-
- skb_queue_purge(&hdev->rx_hcp_frags);
- skb_queue_purge(&hdev->msg_rx_queue);
-
- list_for_each_entry_safe(msg, n, &hdev->msg_tx_queue, msg_l) {
- list_del(&msg->msg_l);
- skb_queue_purge(&msg->msg_frags);
- kfree(msg);
- }
-
- del_timer_sync(&hdev->cmd_timer);
-
- nfc_unregister_device(hdev->ndev);
-
- destroy_workqueue(hdev->msg_tx_wq);
-
- destroy_workqueue(hdev->msg_rx_wq);
-}
-EXPORT_SYMBOL(nfc_hci_unregister_device);
-
-void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata)
-{
- hdev->clientdata = clientdata;
-}
-EXPORT_SYMBOL(nfc_hci_set_clientdata);
-
-void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev)
-{
- return hdev->clientdata;
-}
-EXPORT_SYMBOL(nfc_hci_get_clientdata);
-
static void nfc_hci_failure(struct nfc_hci_dev *hdev, int err)
{
mutex_lock(&hdev->msg_tx_mutex);
@@ -758,13 +646,12 @@
mutex_unlock(&hdev->msg_tx_mutex);
}
-void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err)
+static void nfc_hci_llc_failure(struct nfc_hci_dev *hdev, int err)
{
nfc_hci_failure(hdev, err);
}
-EXPORT_SYMBOL(nfc_hci_driver_failure);
-void nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+static void nfc_hci_recv_from_llc(struct nfc_hci_dev *hdev, struct sk_buff *skb)
{
struct hcp_packet *packet;
u8 type;
@@ -827,9 +714,158 @@
nfc_hci_hcp_message_rx(hdev, pipe, type, instruction, hcp_skb);
} else {
skb_queue_tail(&hdev->msg_rx_queue, hcp_skb);
- queue_work(hdev->msg_rx_wq, &hdev->msg_rx_work);
+ queue_work(system_nrt_wq, &hdev->msg_rx_work);
}
}
+
+static struct nfc_ops hci_nfc_ops = {
+ .dev_up = hci_dev_up,
+ .dev_down = hci_dev_down,
+ .start_poll = hci_start_poll,
+ .stop_poll = hci_stop_poll,
+ .activate_target = hci_activate_target,
+ .deactivate_target = hci_deactivate_target,
+ .im_transceive = hci_transceive,
+ .check_presence = hci_check_presence,
+};
+
+struct nfc_hci_dev *nfc_hci_allocate_device(struct nfc_hci_ops *ops,
+ struct nfc_hci_init_data *init_data,
+ u32 protocols,
+ const char *llc_name,
+ int tx_headroom,
+ int tx_tailroom,
+ int max_link_payload)
+{
+ struct nfc_hci_dev *hdev;
+
+ if (ops->xmit == NULL)
+ return NULL;
+
+ if (protocols == 0)
+ return NULL;
+
+ hdev = kzalloc(sizeof(struct nfc_hci_dev), GFP_KERNEL);
+ if (hdev == NULL)
+ return NULL;
+
+ hdev->llc = nfc_llc_allocate(llc_name, hdev, ops->xmit,
+ nfc_hci_recv_from_llc, tx_headroom,
+ tx_tailroom, nfc_hci_llc_failure);
+ if (hdev->llc == NULL) {
+ kfree(hdev);
+ return NULL;
+ }
+
+ hdev->ndev = nfc_allocate_device(&hci_nfc_ops, protocols,
+ tx_headroom + HCI_CMDS_HEADROOM,
+ tx_tailroom);
+ if (!hdev->ndev) {
+ nfc_llc_free(hdev->llc);
+ kfree(hdev);
+ return NULL;
+ }
+
+ hdev->ops = ops;
+ hdev->max_data_link_payload = max_link_payload;
+ hdev->init_data = *init_data;
+
+ nfc_set_drvdata(hdev->ndev, hdev);
+
+ memset(hdev->gate2pipe, NFC_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
+
+ return hdev;
+}
+EXPORT_SYMBOL(nfc_hci_allocate_device);
+
+void nfc_hci_free_device(struct nfc_hci_dev *hdev)
+{
+ nfc_free_device(hdev->ndev);
+ nfc_llc_free(hdev->llc);
+ kfree(hdev);
+}
+EXPORT_SYMBOL(nfc_hci_free_device);
+
+int nfc_hci_register_device(struct nfc_hci_dev *hdev)
+{
+ mutex_init(&hdev->msg_tx_mutex);
+
+ INIT_LIST_HEAD(&hdev->msg_tx_queue);
+
+ INIT_WORK(&hdev->msg_tx_work, nfc_hci_msg_tx_work);
+
+ init_timer(&hdev->cmd_timer);
+ hdev->cmd_timer.data = (unsigned long)hdev;
+ hdev->cmd_timer.function = nfc_hci_cmd_timeout;
+
+ skb_queue_head_init(&hdev->rx_hcp_frags);
+
+ INIT_WORK(&hdev->msg_rx_work, nfc_hci_msg_rx_work);
+
+ skb_queue_head_init(&hdev->msg_rx_queue);
+
+ return nfc_register_device(hdev->ndev);
+}
+EXPORT_SYMBOL(nfc_hci_register_device);
+
+void nfc_hci_unregister_device(struct nfc_hci_dev *hdev)
+{
+ struct hci_msg *msg, *n;
+
+ skb_queue_purge(&hdev->rx_hcp_frags);
+ skb_queue_purge(&hdev->msg_rx_queue);
+
+ list_for_each_entry_safe(msg, n, &hdev->msg_tx_queue, msg_l) {
+ list_del(&msg->msg_l);
+ skb_queue_purge(&msg->msg_frags);
+ kfree(msg);
+ }
+
+ del_timer_sync(&hdev->cmd_timer);
+
+ nfc_unregister_device(hdev->ndev);
+
+ cancel_work_sync(&hdev->msg_tx_work);
+ cancel_work_sync(&hdev->msg_rx_work);
+}
+EXPORT_SYMBOL(nfc_hci_unregister_device);
+
+void nfc_hci_set_clientdata(struct nfc_hci_dev *hdev, void *clientdata)
+{
+ hdev->clientdata = clientdata;
+}
+EXPORT_SYMBOL(nfc_hci_set_clientdata);
+
+void *nfc_hci_get_clientdata(struct nfc_hci_dev *hdev)
+{
+ return hdev->clientdata;
+}
+EXPORT_SYMBOL(nfc_hci_get_clientdata);
+
+void nfc_hci_driver_failure(struct nfc_hci_dev *hdev, int err)
+{
+ nfc_hci_failure(hdev, err);
+}
+EXPORT_SYMBOL(nfc_hci_driver_failure);
+
+void inline nfc_hci_recv_frame(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+{
+ nfc_llc_rcv_from_drv(hdev->llc, skb);
+}
EXPORT_SYMBOL(nfc_hci_recv_frame);
+static int __init nfc_hci_init(void)
+{
+ return nfc_llc_init();
+}
+
+static void __exit nfc_hci_exit(void)
+{
+ nfc_llc_exit();
+}
+
+subsys_initcall(nfc_hci_init);
+module_exit(nfc_hci_exit);
+
MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("NFC HCI Core");
diff --git a/net/nfc/hci/hci.h b/net/nfc/hci/hci.h
index fa9a21e..b274d12 100644
--- a/net/nfc/hci/hci.h
+++ b/net/nfc/hci/hci.h
@@ -20,6 +20,8 @@
#ifndef __LOCAL_HCI_H
#define __LOCAL_HCI_H
+#include <net/nfc/hci.h>
+
struct gate_pipe_map {
u8 gate;
u8 pipe;
@@ -35,15 +37,6 @@
struct hcp_message message;
} __packed;
-/*
- * HCI command execution completion callback.
- * result will be a standard linux error (may be converted from HCI response)
- * skb contains the response data and must be disposed, or may be NULL if
- * an error occured
- */
-typedef void (*hci_cmd_cb_t) (struct nfc_hci_dev *hdev, int result,
- struct sk_buff *skb, void *cb_data);
-
struct hcp_exec_waiter {
wait_queue_head_t *wq;
bool exec_complete;
@@ -55,7 +48,7 @@
struct list_head msg_l;
struct sk_buff_head msg_frags;
bool wait_response;
- hci_cmd_cb_t cb;
+ data_exchange_cb_t cb;
void *cb_context;
unsigned long completion_delay;
};
@@ -83,7 +76,7 @@
int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe,
u8 type, u8 instruction,
const u8 *payload, size_t payload_len,
- hci_cmd_cb_t cb, void *cb_data,
+ data_exchange_cb_t cb, void *cb_context,
unsigned long completion_delay);
u8 nfc_hci_pipe2gate(struct nfc_hci_dev *hdev, u8 pipe);
diff --git a/net/nfc/hci/hcp.c b/net/nfc/hci/hcp.c
index f4dad1a..208eedd 100644
--- a/net/nfc/hci/hcp.c
+++ b/net/nfc/hci/hcp.c
@@ -35,7 +35,7 @@
int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe,
u8 type, u8 instruction,
const u8 *payload, size_t payload_len,
- hci_cmd_cb_t cb, void *cb_data,
+ data_exchange_cb_t cb, void *cb_context,
unsigned long completion_delay)
{
struct nfc_dev *ndev = hdev->ndev;
@@ -52,7 +52,7 @@
skb_queue_head_init(&cmd->msg_frags);
cmd->wait_response = (type == NFC_HCI_HCP_COMMAND) ? true : false;
cmd->cb = cb;
- cmd->cb_context = cb_data;
+ cmd->cb_context = cb_context;
cmd->completion_delay = completion_delay;
hci_len = payload_len + 1;
@@ -108,7 +108,7 @@
list_add_tail(&cmd->msg_l, &hdev->msg_tx_queue);
mutex_unlock(&hdev->msg_tx_mutex);
- queue_work(hdev->msg_tx_wq, &hdev->msg_tx_work);
+ queue_work(system_nrt_wq, &hdev->msg_tx_work);
return 0;
diff --git a/net/nfc/hci/llc.c b/net/nfc/hci/llc.c
new file mode 100644
index 0000000..ae1205d
--- /dev/null
+++ b/net/nfc/hci/llc.c
@@ -0,0 +1,170 @@
+/*
+ * Link Layer Control manager
+ *
+ * Copyright (C) 2012 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <net/nfc/llc.h>
+
+#include "llc.h"
+
+static struct list_head llc_engines;
+
+int nfc_llc_init(void)
+{
+ int r;
+
+ INIT_LIST_HEAD(&llc_engines);
+
+ r = nfc_llc_nop_register();
+ if (r)
+ goto exit;
+
+ r = nfc_llc_shdlc_register();
+ if (r)
+ goto exit;
+
+ return 0;
+
+exit:
+ nfc_llc_exit();
+ return r;
+}
+
+void nfc_llc_exit(void)
+{
+ struct nfc_llc_engine *llc_engine, *n;
+
+ list_for_each_entry_safe(llc_engine, n, &llc_engines, entry) {
+ list_del(&llc_engine->entry);
+ kfree(llc_engine->name);
+ kfree(llc_engine);
+ }
+}
+
+int nfc_llc_register(const char *name, struct nfc_llc_ops *ops)
+{
+ struct nfc_llc_engine *llc_engine;
+
+ llc_engine = kzalloc(sizeof(struct nfc_llc_engine), GFP_KERNEL);
+ if (llc_engine == NULL)
+ return -ENOMEM;
+
+ llc_engine->name = kstrdup(name, GFP_KERNEL);
+ if (llc_engine->name == NULL) {
+ kfree(llc_engine);
+ return -ENOMEM;
+ }
+ llc_engine->ops = ops;
+
+ INIT_LIST_HEAD(&llc_engine->entry);
+ list_add_tail (&llc_engine->entry, &llc_engines);
+
+ return 0;
+}
+
+static struct nfc_llc_engine *nfc_llc_name_to_engine(const char *name)
+{
+ struct nfc_llc_engine *llc_engine;
+
+ list_for_each_entry(llc_engine, &llc_engines, entry) {
+ if (strcmp(llc_engine->name, name) == 0)
+ return llc_engine;
+ }
+
+ return NULL;
+}
+
+void nfc_llc_unregister(const char *name)
+{
+ struct nfc_llc_engine *llc_engine;
+
+ llc_engine = nfc_llc_name_to_engine(name);
+ if (llc_engine == NULL)
+ return;
+
+ list_del(&llc_engine->entry);
+ kfree(llc_engine->name);
+ kfree(llc_engine);
+}
+
+struct nfc_llc *nfc_llc_allocate(const char *name, struct nfc_hci_dev *hdev,
+ xmit_to_drv_t xmit_to_drv,
+ rcv_to_hci_t rcv_to_hci, int tx_headroom,
+ int tx_tailroom, llc_failure_t llc_failure)
+{
+ struct nfc_llc_engine *llc_engine;
+ struct nfc_llc *llc;
+
+ llc_engine = nfc_llc_name_to_engine(name);
+ if (llc_engine == NULL)
+ return NULL;
+
+ llc = kzalloc(sizeof(struct nfc_llc), GFP_KERNEL);
+ if (llc == NULL)
+ return NULL;
+
+ llc->data = llc_engine->ops->init(hdev, xmit_to_drv, rcv_to_hci,
+ tx_headroom, tx_tailroom,
+ &llc->rx_headroom, &llc->rx_tailroom,
+ llc_failure);
+ if (llc->data == NULL) {
+ kfree(llc);
+ return NULL;
+ }
+ llc->ops = llc_engine->ops;
+
+ return llc;
+}
+
+void nfc_llc_free(struct nfc_llc *llc)
+{
+ llc->ops->deinit(llc);
+ kfree(llc);
+}
+
+inline void nfc_llc_get_rx_head_tail_room(struct nfc_llc *llc, int *rx_headroom,
+ int *rx_tailroom)
+{
+ *rx_headroom = llc->rx_headroom;
+ *rx_tailroom = llc->rx_tailroom;
+}
+
+inline int nfc_llc_start(struct nfc_llc *llc)
+{
+ return llc->ops->start(llc);
+}
+
+inline int nfc_llc_stop(struct nfc_llc *llc)
+{
+ return llc->ops->stop(llc);
+}
+
+inline void nfc_llc_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb)
+{
+ llc->ops->rcv_from_drv(llc, skb);
+}
+
+inline int nfc_llc_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb)
+{
+ return llc->ops->xmit_from_hci(llc, skb);
+}
+
+inline void *nfc_llc_get_data(struct nfc_llc *llc)
+{
+ return llc->data;
+}
diff --git a/net/nfc/hci/llc.h b/net/nfc/hci/llc.h
new file mode 100644
index 0000000..7be0b7f
--- /dev/null
+++ b/net/nfc/hci/llc.h
@@ -0,0 +1,69 @@
+/*
+ * Link Layer Control manager
+ *
+ * Copyright (C) 2012 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __LOCAL_LLC_H_
+#define __LOCAL_LLC_H_
+
+#include <net/nfc/hci.h>
+#include <net/nfc/llc.h>
+#include <linux/skbuff.h>
+
+struct nfc_llc_ops {
+ void *(*init) (struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv,
+ rcv_to_hci_t rcv_to_hci, int tx_headroom,
+ int tx_tailroom, int *rx_headroom, int *rx_tailroom,
+ llc_failure_t llc_failure);
+ void (*deinit) (struct nfc_llc *llc);
+ int (*start) (struct nfc_llc *llc);
+ int (*stop) (struct nfc_llc *llc);
+ void (*rcv_from_drv) (struct nfc_llc *llc, struct sk_buff *skb);
+ int (*xmit_from_hci) (struct nfc_llc *llc, struct sk_buff *skb);
+};
+
+struct nfc_llc_engine {
+ const char *name;
+ struct nfc_llc_ops *ops;
+ struct list_head entry;
+};
+
+struct nfc_llc {
+ void *data;
+ struct nfc_llc_ops *ops;
+ int rx_headroom;
+ int rx_tailroom;
+};
+
+void *nfc_llc_get_data(struct nfc_llc *llc);
+
+int nfc_llc_register(const char *name, struct nfc_llc_ops *ops);
+void nfc_llc_unregister(const char *name);
+
+int nfc_llc_nop_register(void);
+
+#if defined(CONFIG_NFC_SHDLC)
+int nfc_llc_shdlc_register(void);
+#else
+static inline int nfc_llc_shdlc_register(void)
+{
+ return 0;
+}
+#endif
+
+#endif /* __LOCAL_LLC_H_ */
diff --git a/net/nfc/hci/llc_nop.c b/net/nfc/hci/llc_nop.c
new file mode 100644
index 0000000..87b1029
--- /dev/null
+++ b/net/nfc/hci/llc_nop.c
@@ -0,0 +1,99 @@
+/*
+ * nop (passthrough) Link Layer Control
+ *
+ * Copyright (C) 2012 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/types.h>
+
+#include "llc.h"
+
+struct llc_nop {
+ struct nfc_hci_dev *hdev;
+ xmit_to_drv_t xmit_to_drv;
+ rcv_to_hci_t rcv_to_hci;
+ int tx_headroom;
+ int tx_tailroom;
+ llc_failure_t llc_failure;
+};
+
+static void *llc_nop_init(struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv,
+ rcv_to_hci_t rcv_to_hci, int tx_headroom,
+ int tx_tailroom, int *rx_headroom, int *rx_tailroom,
+ llc_failure_t llc_failure)
+{
+ struct llc_nop *llc_nop;
+
+ *rx_headroom = 0;
+ *rx_tailroom = 0;
+
+ llc_nop = kzalloc(sizeof(struct llc_nop), GFP_KERNEL);
+ if (llc_nop == NULL)
+ return NULL;
+
+ llc_nop->hdev = hdev;
+ llc_nop->xmit_to_drv = xmit_to_drv;
+ llc_nop->rcv_to_hci = rcv_to_hci;
+ llc_nop->tx_headroom = tx_headroom;
+ llc_nop->tx_tailroom = tx_tailroom;
+ llc_nop->llc_failure = llc_failure;
+
+ return llc_nop;
+}
+
+static void llc_nop_deinit(struct nfc_llc *llc)
+{
+ kfree(nfc_llc_get_data(llc));
+}
+
+static int llc_nop_start(struct nfc_llc *llc)
+{
+ return 0;
+}
+
+static int llc_nop_stop(struct nfc_llc *llc)
+{
+ return 0;
+}
+
+static void llc_nop_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb)
+{
+ struct llc_nop *llc_nop = nfc_llc_get_data(llc);
+
+ llc_nop->rcv_to_hci(llc_nop->hdev, skb);
+}
+
+static int llc_nop_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb)
+{
+ struct llc_nop *llc_nop = nfc_llc_get_data(llc);
+
+ return llc_nop->xmit_to_drv(llc_nop->hdev, skb);
+}
+
+static struct nfc_llc_ops llc_nop_ops = {
+ .init = llc_nop_init,
+ .deinit = llc_nop_deinit,
+ .start = llc_nop_start,
+ .stop = llc_nop_stop,
+ .rcv_from_drv = llc_nop_rcv_from_drv,
+ .xmit_from_hci = llc_nop_xmit_from_hci,
+};
+
+int nfc_llc_nop_register(void)
+{
+ return nfc_llc_register(LLC_NOP_NAME, &llc_nop_ops);
+}
diff --git a/net/nfc/hci/llc_shdlc.c b/net/nfc/hci/llc_shdlc.c
new file mode 100644
index 0000000..8f69d79
--- /dev/null
+++ b/net/nfc/hci/llc_shdlc.c
@@ -0,0 +1,857 @@
+/*
+ * shdlc Link Layer Control
+ *
+ * Copyright (C) 2012 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#define pr_fmt(fmt) "shdlc: %s: " fmt, __func__
+
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/wait.h>
+#include <linux/slab.h>
+#include <linux/skbuff.h>
+
+#include "llc.h"
+
+enum shdlc_state {
+ SHDLC_DISCONNECTED = 0,
+ SHDLC_CONNECTING = 1,
+ SHDLC_NEGOTIATING = 2,
+ SHDLC_HALF_CONNECTED = 3,
+ SHDLC_CONNECTED = 4
+};
+
+struct llc_shdlc {
+ struct nfc_hci_dev *hdev;
+ xmit_to_drv_t xmit_to_drv;
+ rcv_to_hci_t rcv_to_hci;
+
+ struct mutex state_mutex;
+ enum shdlc_state state;
+ int hard_fault;
+
+ wait_queue_head_t *connect_wq;
+ int connect_tries;
+ int connect_result;
+ struct timer_list connect_timer;/* aka T3 in spec 10.6.1 */
+
+ u8 w; /* window size */
+ bool srej_support;
+
+ struct timer_list t1_timer; /* send ack timeout */
+ bool t1_active;
+
+ struct timer_list t2_timer; /* guard/retransmit timeout */
+ bool t2_active;
+
+ int ns; /* next seq num for send */
+ int nr; /* next expected seq num for receive */
+ int dnr; /* oldest sent unacked seq num */
+
+ struct sk_buff_head rcv_q;
+
+ struct sk_buff_head send_q;
+ bool rnr; /* other side is not ready to receive */
+
+ struct sk_buff_head ack_pending_q;
+
+ struct work_struct sm_work;
+
+ int tx_headroom;
+ int tx_tailroom;
+
+ llc_failure_t llc_failure;
+};
+
+#define SHDLC_LLC_HEAD_ROOM 2
+
+#define SHDLC_MAX_WINDOW 4
+#define SHDLC_SREJ_SUPPORT false
+
+#define SHDLC_CONTROL_HEAD_MASK 0xe0
+#define SHDLC_CONTROL_HEAD_I 0x80
+#define SHDLC_CONTROL_HEAD_I2 0xa0
+#define SHDLC_CONTROL_HEAD_S 0xc0
+#define SHDLC_CONTROL_HEAD_U 0xe0
+
+#define SHDLC_CONTROL_NS_MASK 0x38
+#define SHDLC_CONTROL_NR_MASK 0x07
+#define SHDLC_CONTROL_TYPE_MASK 0x18
+
+#define SHDLC_CONTROL_M_MASK 0x1f
+
+enum sframe_type {
+ S_FRAME_RR = 0x00,
+ S_FRAME_REJ = 0x01,
+ S_FRAME_RNR = 0x02,
+ S_FRAME_SREJ = 0x03
+};
+
+enum uframe_modifier {
+ U_FRAME_UA = 0x06,
+ U_FRAME_RSET = 0x19
+};
+
+#define SHDLC_CONNECT_VALUE_MS 5
+#define SHDLC_T1_VALUE_MS(w) ((5 * w) / 4)
+#define SHDLC_T2_VALUE_MS 300
+
+#define SHDLC_DUMP_SKB(info, skb) \
+do { \
+ pr_debug("%s:\n", info); \
+ print_hex_dump(KERN_DEBUG, "shdlc: ", DUMP_PREFIX_OFFSET, \
+ 16, 1, skb->data, skb->len, 0); \
+} while (0)
+
+/* checks x < y <= z modulo 8 */
+static bool llc_shdlc_x_lt_y_lteq_z(int x, int y, int z)
+{
+ if (x < z)
+ return ((x < y) && (y <= z)) ? true : false;
+ else
+ return ((y > x) || (y <= z)) ? true : false;
+}
+
+/* checks x <= y < z modulo 8 */
+static bool llc_shdlc_x_lteq_y_lt_z(int x, int y, int z)
+{
+ if (x <= z)
+ return ((x <= y) && (y < z)) ? true : false;
+ else /* x > z -> z+8 > x */
+ return ((y >= x) || (y < z)) ? true : false;
+}
+
+static struct sk_buff *llc_shdlc_alloc_skb(struct llc_shdlc *shdlc,
+ int payload_len)
+{
+ struct sk_buff *skb;
+
+ skb = alloc_skb(shdlc->tx_headroom + SHDLC_LLC_HEAD_ROOM +
+ shdlc->tx_tailroom + payload_len, GFP_KERNEL);
+ if (skb)
+ skb_reserve(skb, shdlc->tx_headroom + SHDLC_LLC_HEAD_ROOM);
+
+ return skb;
+}
+
+/* immediately sends an S frame. */
+static int llc_shdlc_send_s_frame(struct llc_shdlc *shdlc,
+ enum sframe_type sframe_type, int nr)
+{
+ int r;
+ struct sk_buff *skb;
+
+ pr_debug("sframe_type=%d nr=%d\n", sframe_type, nr);
+
+ skb = llc_shdlc_alloc_skb(shdlc, 0);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ *skb_push(skb, 1) = SHDLC_CONTROL_HEAD_S | (sframe_type << 3) | nr;
+
+ r = shdlc->xmit_to_drv(shdlc->hdev, skb);
+
+ kfree_skb(skb);
+
+ return r;
+}
+
+/* immediately sends an U frame. skb may contain optional payload */
+static int llc_shdlc_send_u_frame(struct llc_shdlc *shdlc,
+ struct sk_buff *skb,
+ enum uframe_modifier uframe_modifier)
+{
+ int r;
+
+ pr_debug("uframe_modifier=%d\n", uframe_modifier);
+
+ *skb_push(skb, 1) = SHDLC_CONTROL_HEAD_U | uframe_modifier;
+
+ r = shdlc->xmit_to_drv(shdlc->hdev, skb);
+
+ kfree_skb(skb);
+
+ return r;
+}
+
+/*
+ * Free ack_pending frames until y_nr - 1, and reset t2 according to
+ * the remaining oldest ack_pending frame sent time
+ */
+static void llc_shdlc_reset_t2(struct llc_shdlc *shdlc, int y_nr)
+{
+ struct sk_buff *skb;
+ int dnr = shdlc->dnr; /* MUST initially be < y_nr */
+
+ pr_debug("release ack pending up to frame %d excluded\n", y_nr);
+
+ while (dnr != y_nr) {
+ pr_debug("release ack pending frame %d\n", dnr);
+
+ skb = skb_dequeue(&shdlc->ack_pending_q);
+ kfree_skb(skb);
+
+ dnr = (dnr + 1) % 8;
+ }
+
+ if (skb_queue_empty(&shdlc->ack_pending_q)) {
+ if (shdlc->t2_active) {
+ del_timer_sync(&shdlc->t2_timer);
+ shdlc->t2_active = false;
+
+ pr_debug
+ ("All sent frames acked. Stopped T2(retransmit)\n");
+ }
+ } else {
+ skb = skb_peek(&shdlc->ack_pending_q);
+
+ mod_timer(&shdlc->t2_timer, *(unsigned long *)skb->cb +
+ msecs_to_jiffies(SHDLC_T2_VALUE_MS));
+ shdlc->t2_active = true;
+
+ pr_debug
+ ("Start T2(retransmit) for remaining unacked sent frames\n");
+ }
+}
+
+/*
+ * Receive validated frames from lower layer. skb contains HCI payload only.
+ * Handle according to algorithm at spec:10.8.2
+ */
+static void llc_shdlc_rcv_i_frame(struct llc_shdlc *shdlc,
+ struct sk_buff *skb, int ns, int nr)
+{
+ int x_ns = ns;
+ int y_nr = nr;
+
+ pr_debug("recvd I-frame %d, remote waiting frame %d\n", ns, nr);
+
+ if (shdlc->state != SHDLC_CONNECTED)
+ goto exit;
+
+ if (x_ns != shdlc->nr) {
+ llc_shdlc_send_s_frame(shdlc, S_FRAME_REJ, shdlc->nr);
+ goto exit;
+ }
+
+ if (shdlc->t1_active == false) {
+ shdlc->t1_active = true;
+ mod_timer(&shdlc->t1_timer, jiffies +
+ msecs_to_jiffies(SHDLC_T1_VALUE_MS(shdlc->w)));
+ pr_debug("(re)Start T1(send ack)\n");
+ }
+
+ if (skb->len) {
+ shdlc->rcv_to_hci(shdlc->hdev, skb);
+ skb = NULL;
+ }
+
+ shdlc->nr = (shdlc->nr + 1) % 8;
+
+ if (llc_shdlc_x_lt_y_lteq_z(shdlc->dnr, y_nr, shdlc->ns)) {
+ llc_shdlc_reset_t2(shdlc, y_nr);
+
+ shdlc->dnr = y_nr;
+ }
+
+exit:
+ kfree_skb(skb);
+}
+
+static void llc_shdlc_rcv_ack(struct llc_shdlc *shdlc, int y_nr)
+{
+ pr_debug("remote acked up to frame %d excluded\n", y_nr);
+
+ if (llc_shdlc_x_lt_y_lteq_z(shdlc->dnr, y_nr, shdlc->ns)) {
+ llc_shdlc_reset_t2(shdlc, y_nr);
+ shdlc->dnr = y_nr;
+ }
+}
+
+static void llc_shdlc_requeue_ack_pending(struct llc_shdlc *shdlc)
+{
+ struct sk_buff *skb;
+
+ pr_debug("ns reset to %d\n", shdlc->dnr);
+
+ while ((skb = skb_dequeue_tail(&shdlc->ack_pending_q))) {
+ skb_pull(skb, 1); /* remove control field */
+ skb_queue_head(&shdlc->send_q, skb);
+ }
+ shdlc->ns = shdlc->dnr;
+}
+
+static void llc_shdlc_rcv_rej(struct llc_shdlc *shdlc, int y_nr)
+{
+ struct sk_buff *skb;
+
+ pr_debug("remote asks retransmition from frame %d\n", y_nr);
+
+ if (llc_shdlc_x_lteq_y_lt_z(shdlc->dnr, y_nr, shdlc->ns)) {
+ if (shdlc->t2_active) {
+ del_timer_sync(&shdlc->t2_timer);
+ shdlc->t2_active = false;
+ pr_debug("Stopped T2(retransmit)\n");
+ }
+
+ if (shdlc->dnr != y_nr) {
+ while ((shdlc->dnr = ((shdlc->dnr + 1) % 8)) != y_nr) {
+ skb = skb_dequeue(&shdlc->ack_pending_q);
+ kfree_skb(skb);
+ }
+ }
+
+ llc_shdlc_requeue_ack_pending(shdlc);
+ }
+}
+
+/* See spec RR:10.8.3 REJ:10.8.4 */
+static void llc_shdlc_rcv_s_frame(struct llc_shdlc *shdlc,
+ enum sframe_type s_frame_type, int nr)
+{
+ struct sk_buff *skb;
+
+ if (shdlc->state != SHDLC_CONNECTED)
+ return;
+
+ switch (s_frame_type) {
+ case S_FRAME_RR:
+ llc_shdlc_rcv_ack(shdlc, nr);
+ if (shdlc->rnr == true) { /* see SHDLC 10.7.7 */
+ shdlc->rnr = false;
+ if (shdlc->send_q.qlen == 0) {
+ skb = llc_shdlc_alloc_skb(shdlc, 0);
+ if (skb)
+ skb_queue_tail(&shdlc->send_q, skb);
+ }
+ }
+ break;
+ case S_FRAME_REJ:
+ llc_shdlc_rcv_rej(shdlc, nr);
+ break;
+ case S_FRAME_RNR:
+ llc_shdlc_rcv_ack(shdlc, nr);
+ shdlc->rnr = true;
+ break;
+ default:
+ break;
+ }
+}
+
+static void llc_shdlc_connect_complete(struct llc_shdlc *shdlc, int r)
+{
+ pr_debug("result=%d\n", r);
+
+ del_timer_sync(&shdlc->connect_timer);
+
+ if (r == 0) {
+ shdlc->ns = 0;
+ shdlc->nr = 0;
+ shdlc->dnr = 0;
+
+ shdlc->state = SHDLC_HALF_CONNECTED;
+ } else {
+ shdlc->state = SHDLC_DISCONNECTED;
+ }
+
+ shdlc->connect_result = r;
+
+ wake_up(shdlc->connect_wq);
+}
+
+static int llc_shdlc_connect_initiate(struct llc_shdlc *shdlc)
+{
+ struct sk_buff *skb;
+
+ pr_debug("\n");
+
+ skb = llc_shdlc_alloc_skb(shdlc, 2);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ *skb_put(skb, 1) = SHDLC_MAX_WINDOW;
+ *skb_put(skb, 1) = SHDLC_SREJ_SUPPORT ? 1 : 0;
+
+ return llc_shdlc_send_u_frame(shdlc, skb, U_FRAME_RSET);
+}
+
+static int llc_shdlc_connect_send_ua(struct llc_shdlc *shdlc)
+{
+ struct sk_buff *skb;
+
+ pr_debug("\n");
+
+ skb = llc_shdlc_alloc_skb(shdlc, 0);
+ if (skb == NULL)
+ return -ENOMEM;
+
+ return llc_shdlc_send_u_frame(shdlc, skb, U_FRAME_UA);
+}
+
+static void llc_shdlc_rcv_u_frame(struct llc_shdlc *shdlc,
+ struct sk_buff *skb,
+ enum uframe_modifier u_frame_modifier)
+{
+ u8 w = SHDLC_MAX_WINDOW;
+ bool srej_support = SHDLC_SREJ_SUPPORT;
+ int r;
+
+ pr_debug("u_frame_modifier=%d\n", u_frame_modifier);
+
+ switch (u_frame_modifier) {
+ case U_FRAME_RSET:
+ switch (shdlc->state) {
+ case SHDLC_NEGOTIATING:
+ case SHDLC_CONNECTING:
+ /*
+ * We sent RSET, but chip wants to negociate or we
+ * got RSET before we managed to send out our.
+ */
+ if (skb->len > 0)
+ w = skb->data[0];
+
+ if (skb->len > 1)
+ srej_support = skb->data[1] & 0x01 ? true :
+ false;
+
+ if ((w <= SHDLC_MAX_WINDOW) &&
+ (SHDLC_SREJ_SUPPORT || (srej_support == false))) {
+ shdlc->w = w;
+ shdlc->srej_support = srej_support;
+ r = llc_shdlc_connect_send_ua(shdlc);
+ llc_shdlc_connect_complete(shdlc, r);
+ }
+ break;
+ case SHDLC_HALF_CONNECTED:
+ /*
+ * Chip resent RSET due to its timeout - Ignote it
+ * as we already sent UA.
+ */
+ break;
+ case SHDLC_CONNECTED:
+ /*
+ * Chip wants to reset link. This is unexpected and
+ * unsupported.
+ */
+ shdlc->hard_fault = -ECONNRESET;
+ break;
+ default:
+ break;
+ }
+ break;
+ case U_FRAME_UA:
+ if ((shdlc->state == SHDLC_CONNECTING &&
+ shdlc->connect_tries > 0) ||
+ (shdlc->state == SHDLC_NEGOTIATING)) {
+ llc_shdlc_connect_complete(shdlc, 0);
+ shdlc->state = SHDLC_CONNECTED;
+ }
+ break;
+ default:
+ break;
+ }
+
+ kfree_skb(skb);
+}
+
+static void llc_shdlc_handle_rcv_queue(struct llc_shdlc *shdlc)
+{
+ struct sk_buff *skb;
+ u8 control;
+ int nr;
+ int ns;
+ enum sframe_type s_frame_type;
+ enum uframe_modifier u_frame_modifier;
+
+ if (shdlc->rcv_q.qlen)
+ pr_debug("rcvQlen=%d\n", shdlc->rcv_q.qlen);
+
+ while ((skb = skb_dequeue(&shdlc->rcv_q)) != NULL) {
+ control = skb->data[0];
+ skb_pull(skb, 1);
+ switch (control & SHDLC_CONTROL_HEAD_MASK) {
+ case SHDLC_CONTROL_HEAD_I:
+ case SHDLC_CONTROL_HEAD_I2:
+ if (shdlc->state == SHDLC_HALF_CONNECTED)
+ shdlc->state = SHDLC_CONNECTED;
+
+ ns = (control & SHDLC_CONTROL_NS_MASK) >> 3;
+ nr = control & SHDLC_CONTROL_NR_MASK;
+ llc_shdlc_rcv_i_frame(shdlc, skb, ns, nr);
+ break;
+ case SHDLC_CONTROL_HEAD_S:
+ if (shdlc->state == SHDLC_HALF_CONNECTED)
+ shdlc->state = SHDLC_CONNECTED;
+
+ s_frame_type = (control & SHDLC_CONTROL_TYPE_MASK) >> 3;
+ nr = control & SHDLC_CONTROL_NR_MASK;
+ llc_shdlc_rcv_s_frame(shdlc, s_frame_type, nr);
+ kfree_skb(skb);
+ break;
+ case SHDLC_CONTROL_HEAD_U:
+ u_frame_modifier = control & SHDLC_CONTROL_M_MASK;
+ llc_shdlc_rcv_u_frame(shdlc, skb, u_frame_modifier);
+ break;
+ default:
+ pr_err("UNKNOWN Control=%d\n", control);
+ kfree_skb(skb);
+ break;
+ }
+ }
+}
+
+static int llc_shdlc_w_used(int ns, int dnr)
+{
+ int unack_count;
+
+ if (dnr <= ns)
+ unack_count = ns - dnr;
+ else
+ unack_count = 8 - dnr + ns;
+
+ return unack_count;
+}
+
+/* Send frames according to algorithm at spec:10.8.1 */
+static void llc_shdlc_handle_send_queue(struct llc_shdlc *shdlc)
+{
+ struct sk_buff *skb;
+ int r;
+ unsigned long time_sent;
+
+ if (shdlc->send_q.qlen)
+ pr_debug
+ ("sendQlen=%d ns=%d dnr=%d rnr=%s w_room=%d unackQlen=%d\n",
+ shdlc->send_q.qlen, shdlc->ns, shdlc->dnr,
+ shdlc->rnr == false ? "false" : "true",
+ shdlc->w - llc_shdlc_w_used(shdlc->ns, shdlc->dnr),
+ shdlc->ack_pending_q.qlen);
+
+ while (shdlc->send_q.qlen && shdlc->ack_pending_q.qlen < shdlc->w &&
+ (shdlc->rnr == false)) {
+
+ if (shdlc->t1_active) {
+ del_timer_sync(&shdlc->t1_timer);
+ shdlc->t1_active = false;
+ pr_debug("Stopped T1(send ack)\n");
+ }
+
+ skb = skb_dequeue(&shdlc->send_q);
+
+ *skb_push(skb, 1) = SHDLC_CONTROL_HEAD_I | (shdlc->ns << 3) |
+ shdlc->nr;
+
+ pr_debug("Sending I-Frame %d, waiting to rcv %d\n", shdlc->ns,
+ shdlc->nr);
+ SHDLC_DUMP_SKB("shdlc frame written", skb);
+
+ r = shdlc->xmit_to_drv(shdlc->hdev, skb);
+ if (r < 0) {
+ shdlc->hard_fault = r;
+ break;
+ }
+
+ shdlc->ns = (shdlc->ns + 1) % 8;
+
+ time_sent = jiffies;
+ *(unsigned long *)skb->cb = time_sent;
+
+ skb_queue_tail(&shdlc->ack_pending_q, skb);
+
+ if (shdlc->t2_active == false) {
+ shdlc->t2_active = true;
+ mod_timer(&shdlc->t2_timer, time_sent +
+ msecs_to_jiffies(SHDLC_T2_VALUE_MS));
+ pr_debug("Started T2 (retransmit)\n");
+ }
+ }
+}
+
+static void llc_shdlc_connect_timeout(unsigned long data)
+{
+ struct llc_shdlc *shdlc = (struct llc_shdlc *)data;
+
+ pr_debug("\n");
+
+ queue_work(system_nrt_wq, &shdlc->sm_work);
+}
+
+static void llc_shdlc_t1_timeout(unsigned long data)
+{
+ struct llc_shdlc *shdlc = (struct llc_shdlc *)data;
+
+ pr_debug("SoftIRQ: need to send ack\n");
+
+ queue_work(system_nrt_wq, &shdlc->sm_work);
+}
+
+static void llc_shdlc_t2_timeout(unsigned long data)
+{
+ struct llc_shdlc *shdlc = (struct llc_shdlc *)data;
+
+ pr_debug("SoftIRQ: need to retransmit\n");
+
+ queue_work(system_nrt_wq, &shdlc->sm_work);
+}
+
+static void llc_shdlc_sm_work(struct work_struct *work)
+{
+ struct llc_shdlc *shdlc = container_of(work, struct llc_shdlc, sm_work);
+ int r;
+
+ pr_debug("\n");
+
+ mutex_lock(&shdlc->state_mutex);
+
+ switch (shdlc->state) {
+ case SHDLC_DISCONNECTED:
+ skb_queue_purge(&shdlc->rcv_q);
+ skb_queue_purge(&shdlc->send_q);
+ skb_queue_purge(&shdlc->ack_pending_q);
+ break;
+ case SHDLC_CONNECTING:
+ if (shdlc->hard_fault) {
+ llc_shdlc_connect_complete(shdlc, shdlc->hard_fault);
+ break;
+ }
+
+ if (shdlc->connect_tries++ < 5)
+ r = llc_shdlc_connect_initiate(shdlc);
+ else
+ r = -ETIME;
+ if (r < 0)
+ llc_shdlc_connect_complete(shdlc, r);
+ else {
+ mod_timer(&shdlc->connect_timer, jiffies +
+ msecs_to_jiffies(SHDLC_CONNECT_VALUE_MS));
+
+ shdlc->state = SHDLC_NEGOTIATING;
+ }
+ break;
+ case SHDLC_NEGOTIATING:
+ if (timer_pending(&shdlc->connect_timer) == 0) {
+ shdlc->state = SHDLC_CONNECTING;
+ queue_work(system_nrt_wq, &shdlc->sm_work);
+ }
+
+ llc_shdlc_handle_rcv_queue(shdlc);
+
+ if (shdlc->hard_fault) {
+ llc_shdlc_connect_complete(shdlc, shdlc->hard_fault);
+ break;
+ }
+ break;
+ case SHDLC_HALF_CONNECTED:
+ case SHDLC_CONNECTED:
+ llc_shdlc_handle_rcv_queue(shdlc);
+ llc_shdlc_handle_send_queue(shdlc);
+
+ if (shdlc->t1_active && timer_pending(&shdlc->t1_timer) == 0) {
+ pr_debug
+ ("Handle T1(send ack) elapsed (T1 now inactive)\n");
+
+ shdlc->t1_active = false;
+ r = llc_shdlc_send_s_frame(shdlc, S_FRAME_RR,
+ shdlc->nr);
+ if (r < 0)
+ shdlc->hard_fault = r;
+ }
+
+ if (shdlc->t2_active && timer_pending(&shdlc->t2_timer) == 0) {
+ pr_debug
+ ("Handle T2(retransmit) elapsed (T2 inactive)\n");
+
+ shdlc->t2_active = false;
+
+ llc_shdlc_requeue_ack_pending(shdlc);
+ llc_shdlc_handle_send_queue(shdlc);
+ }
+
+ if (shdlc->hard_fault) {
+ shdlc->llc_failure(shdlc->hdev, shdlc->hard_fault);
+ }
+ break;
+ default:
+ break;
+ }
+ mutex_unlock(&shdlc->state_mutex);
+}
+
+/*
+ * Called from syscall context to establish shdlc link. Sleeps until
+ * link is ready or failure.
+ */
+static int llc_shdlc_connect(struct llc_shdlc *shdlc)
+{
+ DECLARE_WAIT_QUEUE_HEAD_ONSTACK(connect_wq);
+
+ pr_debug("\n");
+
+ mutex_lock(&shdlc->state_mutex);
+
+ shdlc->state = SHDLC_CONNECTING;
+ shdlc->connect_wq = &connect_wq;
+ shdlc->connect_tries = 0;
+ shdlc->connect_result = 1;
+
+ mutex_unlock(&shdlc->state_mutex);
+
+ queue_work(system_nrt_wq, &shdlc->sm_work);
+
+ wait_event(connect_wq, shdlc->connect_result != 1);
+
+ return shdlc->connect_result;
+}
+
+static void llc_shdlc_disconnect(struct llc_shdlc *shdlc)
+{
+ pr_debug("\n");
+
+ mutex_lock(&shdlc->state_mutex);
+
+ shdlc->state = SHDLC_DISCONNECTED;
+
+ mutex_unlock(&shdlc->state_mutex);
+
+ queue_work(system_nrt_wq, &shdlc->sm_work);
+}
+
+/*
+ * Receive an incoming shdlc frame. Frame has already been crc-validated.
+ * skb contains only LLC header and payload.
+ * If skb == NULL, it is a notification that the link below is dead.
+ */
+static void llc_shdlc_recv_frame(struct llc_shdlc *shdlc, struct sk_buff *skb)
+{
+ if (skb == NULL) {
+ pr_err("NULL Frame -> link is dead\n");
+ shdlc->hard_fault = -EREMOTEIO;
+ } else {
+ SHDLC_DUMP_SKB("incoming frame", skb);
+ skb_queue_tail(&shdlc->rcv_q, skb);
+ }
+
+ queue_work(system_nrt_wq, &shdlc->sm_work);
+}
+
+static void *llc_shdlc_init(struct nfc_hci_dev *hdev, xmit_to_drv_t xmit_to_drv,
+ rcv_to_hci_t rcv_to_hci, int tx_headroom,
+ int tx_tailroom, int *rx_headroom, int *rx_tailroom,
+ llc_failure_t llc_failure)
+{
+ struct llc_shdlc *shdlc;
+
+ *rx_headroom = SHDLC_LLC_HEAD_ROOM;
+ *rx_tailroom = 0;
+
+ shdlc = kzalloc(sizeof(struct llc_shdlc), GFP_KERNEL);
+ if (shdlc == NULL)
+ return NULL;
+
+ mutex_init(&shdlc->state_mutex);
+ shdlc->state = SHDLC_DISCONNECTED;
+
+ init_timer(&shdlc->connect_timer);
+ shdlc->connect_timer.data = (unsigned long)shdlc;
+ shdlc->connect_timer.function = llc_shdlc_connect_timeout;
+
+ init_timer(&shdlc->t1_timer);
+ shdlc->t1_timer.data = (unsigned long)shdlc;
+ shdlc->t1_timer.function = llc_shdlc_t1_timeout;
+
+ init_timer(&shdlc->t2_timer);
+ shdlc->t2_timer.data = (unsigned long)shdlc;
+ shdlc->t2_timer.function = llc_shdlc_t2_timeout;
+
+ shdlc->w = SHDLC_MAX_WINDOW;
+ shdlc->srej_support = SHDLC_SREJ_SUPPORT;
+
+ skb_queue_head_init(&shdlc->rcv_q);
+ skb_queue_head_init(&shdlc->send_q);
+ skb_queue_head_init(&shdlc->ack_pending_q);
+
+ INIT_WORK(&shdlc->sm_work, llc_shdlc_sm_work);
+
+ shdlc->hdev = hdev;
+ shdlc->xmit_to_drv = xmit_to_drv;
+ shdlc->rcv_to_hci = rcv_to_hci;
+ shdlc->tx_headroom = tx_headroom;
+ shdlc->tx_tailroom = tx_tailroom;
+ shdlc->llc_failure = llc_failure;
+
+ return shdlc;
+}
+
+static void llc_shdlc_deinit(struct nfc_llc *llc)
+{
+ struct llc_shdlc *shdlc = nfc_llc_get_data(llc);
+
+ skb_queue_purge(&shdlc->rcv_q);
+ skb_queue_purge(&shdlc->send_q);
+ skb_queue_purge(&shdlc->ack_pending_q);
+
+ kfree(shdlc);
+}
+
+static int llc_shdlc_start(struct nfc_llc *llc)
+{
+ struct llc_shdlc *shdlc = nfc_llc_get_data(llc);
+
+ return llc_shdlc_connect(shdlc);
+}
+
+static int llc_shdlc_stop(struct nfc_llc *llc)
+{
+ struct llc_shdlc *shdlc = nfc_llc_get_data(llc);
+
+ llc_shdlc_disconnect(shdlc);
+
+ return 0;
+}
+
+static void llc_shdlc_rcv_from_drv(struct nfc_llc *llc, struct sk_buff *skb)
+{
+ struct llc_shdlc *shdlc = nfc_llc_get_data(llc);
+
+ llc_shdlc_recv_frame(shdlc, skb);
+}
+
+static int llc_shdlc_xmit_from_hci(struct nfc_llc *llc, struct sk_buff *skb)
+{
+ struct llc_shdlc *shdlc = nfc_llc_get_data(llc);
+
+ skb_queue_tail(&shdlc->send_q, skb);
+
+ queue_work(system_nrt_wq, &shdlc->sm_work);
+
+ return 0;
+}
+
+static struct nfc_llc_ops llc_shdlc_ops = {
+ .init = llc_shdlc_init,
+ .deinit = llc_shdlc_deinit,
+ .start = llc_shdlc_start,
+ .stop = llc_shdlc_stop,
+ .rcv_from_drv = llc_shdlc_rcv_from_drv,
+ .xmit_from_hci = llc_shdlc_xmit_from_hci,
+};
+
+int nfc_llc_shdlc_register(void)
+{
+ return nfc_llc_register(LLC_SHDLC_NAME, &llc_shdlc_ops);
+}
diff --git a/net/nfc/hci/shdlc.c b/net/nfc/hci/shdlc.c
deleted file mode 100644
index 6f840c1..0000000
--- a/net/nfc/hci/shdlc.c
+++ /dev/null
@@ -1,951 +0,0 @@
-/*
- * Copyright (C) 2012 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the
- * Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#define pr_fmt(fmt) "shdlc: %s: " fmt, __func__
-
-#include <linux/sched.h>
-#include <linux/export.h>
-#include <linux/wait.h>
-#include <linux/crc-ccitt.h>
-#include <linux/slab.h>
-#include <linux/skbuff.h>
-
-#include <net/nfc/hci.h>
-#include <net/nfc/shdlc.h>
-
-#define SHDLC_LLC_HEAD_ROOM 2
-#define SHDLC_LLC_TAIL_ROOM 2
-
-#define SHDLC_MAX_WINDOW 4
-#define SHDLC_SREJ_SUPPORT false
-
-#define SHDLC_CONTROL_HEAD_MASK 0xe0
-#define SHDLC_CONTROL_HEAD_I 0x80
-#define SHDLC_CONTROL_HEAD_I2 0xa0
-#define SHDLC_CONTROL_HEAD_S 0xc0
-#define SHDLC_CONTROL_HEAD_U 0xe0
-
-#define SHDLC_CONTROL_NS_MASK 0x38
-#define SHDLC_CONTROL_NR_MASK 0x07
-#define SHDLC_CONTROL_TYPE_MASK 0x18
-
-#define SHDLC_CONTROL_M_MASK 0x1f
-
-enum sframe_type {
- S_FRAME_RR = 0x00,
- S_FRAME_REJ = 0x01,
- S_FRAME_RNR = 0x02,
- S_FRAME_SREJ = 0x03
-};
-
-enum uframe_modifier {
- U_FRAME_UA = 0x06,
- U_FRAME_RSET = 0x19
-};
-
-#define SHDLC_CONNECT_VALUE_MS 5
-#define SHDLC_T1_VALUE_MS(w) ((5 * w) / 4)
-#define SHDLC_T2_VALUE_MS 300
-
-#define SHDLC_DUMP_SKB(info, skb) \
-do { \
- pr_debug("%s:\n", info); \
- print_hex_dump(KERN_DEBUG, "shdlc: ", DUMP_PREFIX_OFFSET, \
- 16, 1, skb->data, skb->len, 0); \
-} while (0)
-
-/* checks x < y <= z modulo 8 */
-static bool nfc_shdlc_x_lt_y_lteq_z(int x, int y, int z)
-{
- if (x < z)
- return ((x < y) && (y <= z)) ? true : false;
- else
- return ((y > x) || (y <= z)) ? true : false;
-}
-
-/* checks x <= y < z modulo 8 */
-static bool nfc_shdlc_x_lteq_y_lt_z(int x, int y, int z)
-{
- if (x <= z)
- return ((x <= y) && (y < z)) ? true : false;
- else /* x > z -> z+8 > x */
- return ((y >= x) || (y < z)) ? true : false;
-}
-
-static struct sk_buff *nfc_shdlc_alloc_skb(struct nfc_shdlc *shdlc,
- int payload_len)
-{
- struct sk_buff *skb;
-
- skb = alloc_skb(shdlc->client_headroom + SHDLC_LLC_HEAD_ROOM +
- shdlc->client_tailroom + SHDLC_LLC_TAIL_ROOM +
- payload_len, GFP_KERNEL);
- if (skb)
- skb_reserve(skb, shdlc->client_headroom + SHDLC_LLC_HEAD_ROOM);
-
- return skb;
-}
-
-static void nfc_shdlc_add_len_crc(struct sk_buff *skb)
-{
- u16 crc;
- int len;
-
- len = skb->len + 2;
- *skb_push(skb, 1) = len;
-
- crc = crc_ccitt(0xffff, skb->data, skb->len);
- crc = ~crc;
- *skb_put(skb, 1) = crc & 0xff;
- *skb_put(skb, 1) = crc >> 8;
-}
-
-/* immediately sends an S frame. */
-static int nfc_shdlc_send_s_frame(struct nfc_shdlc *shdlc,
- enum sframe_type sframe_type, int nr)
-{
- int r;
- struct sk_buff *skb;
-
- pr_debug("sframe_type=%d nr=%d\n", sframe_type, nr);
-
- skb = nfc_shdlc_alloc_skb(shdlc, 0);
- if (skb == NULL)
- return -ENOMEM;
-
- *skb_push(skb, 1) = SHDLC_CONTROL_HEAD_S | (sframe_type << 3) | nr;
-
- nfc_shdlc_add_len_crc(skb);
-
- r = shdlc->ops->xmit(shdlc, skb);
-
- kfree_skb(skb);
-
- return r;
-}
-
-/* immediately sends an U frame. skb may contain optional payload */
-static int nfc_shdlc_send_u_frame(struct nfc_shdlc *shdlc,
- struct sk_buff *skb,
- enum uframe_modifier uframe_modifier)
-{
- int r;
-
- pr_debug("uframe_modifier=%d\n", uframe_modifier);
-
- *skb_push(skb, 1) = SHDLC_CONTROL_HEAD_U | uframe_modifier;
-
- nfc_shdlc_add_len_crc(skb);
-
- r = shdlc->ops->xmit(shdlc, skb);
-
- kfree_skb(skb);
-
- return r;
-}
-
-/*
- * Free ack_pending frames until y_nr - 1, and reset t2 according to
- * the remaining oldest ack_pending frame sent time
- */
-static void nfc_shdlc_reset_t2(struct nfc_shdlc *shdlc, int y_nr)
-{
- struct sk_buff *skb;
- int dnr = shdlc->dnr; /* MUST initially be < y_nr */
-
- pr_debug("release ack pending up to frame %d excluded\n", y_nr);
-
- while (dnr != y_nr) {
- pr_debug("release ack pending frame %d\n", dnr);
-
- skb = skb_dequeue(&shdlc->ack_pending_q);
- kfree_skb(skb);
-
- dnr = (dnr + 1) % 8;
- }
-
- if (skb_queue_empty(&shdlc->ack_pending_q)) {
- if (shdlc->t2_active) {
- del_timer_sync(&shdlc->t2_timer);
- shdlc->t2_active = false;
-
- pr_debug
- ("All sent frames acked. Stopped T2(retransmit)\n");
- }
- } else {
- skb = skb_peek(&shdlc->ack_pending_q);
-
- mod_timer(&shdlc->t2_timer, *(unsigned long *)skb->cb +
- msecs_to_jiffies(SHDLC_T2_VALUE_MS));
- shdlc->t2_active = true;
-
- pr_debug
- ("Start T2(retransmit) for remaining unacked sent frames\n");
- }
-}
-
-/*
- * Receive validated frames from lower layer. skb contains HCI payload only.
- * Handle according to algorithm at spec:10.8.2
- */
-static void nfc_shdlc_rcv_i_frame(struct nfc_shdlc *shdlc,
- struct sk_buff *skb, int ns, int nr)
-{
- int x_ns = ns;
- int y_nr = nr;
-
- pr_debug("recvd I-frame %d, remote waiting frame %d\n", ns, nr);
-
- if (shdlc->state != SHDLC_CONNECTED)
- goto exit;
-
- if (x_ns != shdlc->nr) {
- nfc_shdlc_send_s_frame(shdlc, S_FRAME_REJ, shdlc->nr);
- goto exit;
- }
-
- if (shdlc->t1_active == false) {
- shdlc->t1_active = true;
- mod_timer(&shdlc->t1_timer,
- msecs_to_jiffies(SHDLC_T1_VALUE_MS(shdlc->w)));
- pr_debug("(re)Start T1(send ack)\n");
- }
-
- if (skb->len) {
- nfc_hci_recv_frame(shdlc->hdev, skb);
- skb = NULL;
- }
-
- shdlc->nr = (shdlc->nr + 1) % 8;
-
- if (nfc_shdlc_x_lt_y_lteq_z(shdlc->dnr, y_nr, shdlc->ns)) {
- nfc_shdlc_reset_t2(shdlc, y_nr);
-
- shdlc->dnr = y_nr;
- }
-
-exit:
- if (skb)
- kfree_skb(skb);
-}
-
-static void nfc_shdlc_rcv_ack(struct nfc_shdlc *shdlc, int y_nr)
-{
- pr_debug("remote acked up to frame %d excluded\n", y_nr);
-
- if (nfc_shdlc_x_lt_y_lteq_z(shdlc->dnr, y_nr, shdlc->ns)) {
- nfc_shdlc_reset_t2(shdlc, y_nr);
- shdlc->dnr = y_nr;
- }
-}
-
-static void nfc_shdlc_requeue_ack_pending(struct nfc_shdlc *shdlc)
-{
- struct sk_buff *skb;
-
- pr_debug("ns reset to %d\n", shdlc->dnr);
-
- while ((skb = skb_dequeue_tail(&shdlc->ack_pending_q))) {
- skb_pull(skb, 2); /* remove len+control */
- skb_trim(skb, skb->len - 2); /* remove crc */
- skb_queue_head(&shdlc->send_q, skb);
- }
- shdlc->ns = shdlc->dnr;
-}
-
-static void nfc_shdlc_rcv_rej(struct nfc_shdlc *shdlc, int y_nr)
-{
- struct sk_buff *skb;
-
- pr_debug("remote asks retransmition from frame %d\n", y_nr);
-
- if (nfc_shdlc_x_lteq_y_lt_z(shdlc->dnr, y_nr, shdlc->ns)) {
- if (shdlc->t2_active) {
- del_timer_sync(&shdlc->t2_timer);
- shdlc->t2_active = false;
- pr_debug("Stopped T2(retransmit)\n");
- }
-
- if (shdlc->dnr != y_nr) {
- while ((shdlc->dnr = ((shdlc->dnr + 1) % 8)) != y_nr) {
- skb = skb_dequeue(&shdlc->ack_pending_q);
- kfree_skb(skb);
- }
- }
-
- nfc_shdlc_requeue_ack_pending(shdlc);
- }
-}
-
-/* See spec RR:10.8.3 REJ:10.8.4 */
-static void nfc_shdlc_rcv_s_frame(struct nfc_shdlc *shdlc,
- enum sframe_type s_frame_type, int nr)
-{
- struct sk_buff *skb;
-
- if (shdlc->state != SHDLC_CONNECTED)
- return;
-
- switch (s_frame_type) {
- case S_FRAME_RR:
- nfc_shdlc_rcv_ack(shdlc, nr);
- if (shdlc->rnr == true) { /* see SHDLC 10.7.7 */
- shdlc->rnr = false;
- if (shdlc->send_q.qlen == 0) {
- skb = nfc_shdlc_alloc_skb(shdlc, 0);
- if (skb)
- skb_queue_tail(&shdlc->send_q, skb);
- }
- }
- break;
- case S_FRAME_REJ:
- nfc_shdlc_rcv_rej(shdlc, nr);
- break;
- case S_FRAME_RNR:
- nfc_shdlc_rcv_ack(shdlc, nr);
- shdlc->rnr = true;
- break;
- default:
- break;
- }
-}
-
-static void nfc_shdlc_connect_complete(struct nfc_shdlc *shdlc, int r)
-{
- pr_debug("result=%d\n", r);
-
- del_timer_sync(&shdlc->connect_timer);
-
- if (r == 0) {
- shdlc->ns = 0;
- shdlc->nr = 0;
- shdlc->dnr = 0;
-
- shdlc->state = SHDLC_CONNECTED;
- } else {
- shdlc->state = SHDLC_DISCONNECTED;
- }
-
- shdlc->connect_result = r;
-
- wake_up(shdlc->connect_wq);
-}
-
-static int nfc_shdlc_connect_initiate(struct nfc_shdlc *shdlc)
-{
- struct sk_buff *skb;
-
- pr_debug("\n");
-
- skb = nfc_shdlc_alloc_skb(shdlc, 2);
- if (skb == NULL)
- return -ENOMEM;
-
- *skb_put(skb, 1) = SHDLC_MAX_WINDOW;
- *skb_put(skb, 1) = SHDLC_SREJ_SUPPORT ? 1 : 0;
-
- return nfc_shdlc_send_u_frame(shdlc, skb, U_FRAME_RSET);
-}
-
-static int nfc_shdlc_connect_send_ua(struct nfc_shdlc *shdlc)
-{
- struct sk_buff *skb;
-
- pr_debug("\n");
-
- skb = nfc_shdlc_alloc_skb(shdlc, 0);
- if (skb == NULL)
- return -ENOMEM;
-
- return nfc_shdlc_send_u_frame(shdlc, skb, U_FRAME_UA);
-}
-
-static void nfc_shdlc_rcv_u_frame(struct nfc_shdlc *shdlc,
- struct sk_buff *skb,
- enum uframe_modifier u_frame_modifier)
-{
- u8 w = SHDLC_MAX_WINDOW;
- bool srej_support = SHDLC_SREJ_SUPPORT;
- int r;
-
- pr_debug("u_frame_modifier=%d\n", u_frame_modifier);
-
- switch (u_frame_modifier) {
- case U_FRAME_RSET:
- if (shdlc->state == SHDLC_NEGOCIATING) {
- /* we sent RSET, but chip wants to negociate */
- if (skb->len > 0)
- w = skb->data[0];
-
- if (skb->len > 1)
- srej_support = skb->data[1] & 0x01 ? true :
- false;
-
- if ((w <= SHDLC_MAX_WINDOW) &&
- (SHDLC_SREJ_SUPPORT || (srej_support == false))) {
- shdlc->w = w;
- shdlc->srej_support = srej_support;
- r = nfc_shdlc_connect_send_ua(shdlc);
- nfc_shdlc_connect_complete(shdlc, r);
- }
- } else if (shdlc->state == SHDLC_CONNECTED) {
- /*
- * Chip wants to reset link. This is unexpected and
- * unsupported.
- */
- shdlc->hard_fault = -ECONNRESET;
- }
- break;
- case U_FRAME_UA:
- if ((shdlc->state == SHDLC_CONNECTING &&
- shdlc->connect_tries > 0) ||
- (shdlc->state == SHDLC_NEGOCIATING))
- nfc_shdlc_connect_complete(shdlc, 0);
- break;
- default:
- break;
- }
-
- kfree_skb(skb);
-}
-
-static void nfc_shdlc_handle_rcv_queue(struct nfc_shdlc *shdlc)
-{
- struct sk_buff *skb;
- u8 control;
- int nr;
- int ns;
- enum sframe_type s_frame_type;
- enum uframe_modifier u_frame_modifier;
-
- if (shdlc->rcv_q.qlen)
- pr_debug("rcvQlen=%d\n", shdlc->rcv_q.qlen);
-
- while ((skb = skb_dequeue(&shdlc->rcv_q)) != NULL) {
- control = skb->data[0];
- skb_pull(skb, 1);
- switch (control & SHDLC_CONTROL_HEAD_MASK) {
- case SHDLC_CONTROL_HEAD_I:
- case SHDLC_CONTROL_HEAD_I2:
- ns = (control & SHDLC_CONTROL_NS_MASK) >> 3;
- nr = control & SHDLC_CONTROL_NR_MASK;
- nfc_shdlc_rcv_i_frame(shdlc, skb, ns, nr);
- break;
- case SHDLC_CONTROL_HEAD_S:
- s_frame_type = (control & SHDLC_CONTROL_TYPE_MASK) >> 3;
- nr = control & SHDLC_CONTROL_NR_MASK;
- nfc_shdlc_rcv_s_frame(shdlc, s_frame_type, nr);
- kfree_skb(skb);
- break;
- case SHDLC_CONTROL_HEAD_U:
- u_frame_modifier = control & SHDLC_CONTROL_M_MASK;
- nfc_shdlc_rcv_u_frame(shdlc, skb, u_frame_modifier);
- break;
- default:
- pr_err("UNKNOWN Control=%d\n", control);
- kfree_skb(skb);
- break;
- }
- }
-}
-
-static int nfc_shdlc_w_used(int ns, int dnr)
-{
- int unack_count;
-
- if (dnr <= ns)
- unack_count = ns - dnr;
- else
- unack_count = 8 - dnr + ns;
-
- return unack_count;
-}
-
-/* Send frames according to algorithm at spec:10.8.1 */
-static void nfc_shdlc_handle_send_queue(struct nfc_shdlc *shdlc)
-{
- struct sk_buff *skb;
- int r;
- unsigned long time_sent;
-
- if (shdlc->send_q.qlen)
- pr_debug
- ("sendQlen=%d ns=%d dnr=%d rnr=%s w_room=%d unackQlen=%d\n",
- shdlc->send_q.qlen, shdlc->ns, shdlc->dnr,
- shdlc->rnr == false ? "false" : "true",
- shdlc->w - nfc_shdlc_w_used(shdlc->ns, shdlc->dnr),
- shdlc->ack_pending_q.qlen);
-
- while (shdlc->send_q.qlen && shdlc->ack_pending_q.qlen < shdlc->w &&
- (shdlc->rnr == false)) {
-
- if (shdlc->t1_active) {
- del_timer_sync(&shdlc->t1_timer);
- shdlc->t1_active = false;
- pr_debug("Stopped T1(send ack)\n");
- }
-
- skb = skb_dequeue(&shdlc->send_q);
-
- *skb_push(skb, 1) = SHDLC_CONTROL_HEAD_I | (shdlc->ns << 3) |
- shdlc->nr;
-
- pr_debug("Sending I-Frame %d, waiting to rcv %d\n", shdlc->ns,
- shdlc->nr);
- /* SHDLC_DUMP_SKB("shdlc frame written", skb); */
-
- nfc_shdlc_add_len_crc(skb);
-
- r = shdlc->ops->xmit(shdlc, skb);
- if (r < 0) {
- shdlc->hard_fault = r;
- break;
- }
-
- shdlc->ns = (shdlc->ns + 1) % 8;
-
- time_sent = jiffies;
- *(unsigned long *)skb->cb = time_sent;
-
- skb_queue_tail(&shdlc->ack_pending_q, skb);
-
- if (shdlc->t2_active == false) {
- shdlc->t2_active = true;
- mod_timer(&shdlc->t2_timer, time_sent +
- msecs_to_jiffies(SHDLC_T2_VALUE_MS));
- pr_debug("Started T2 (retransmit)\n");
- }
- }
-}
-
-static void nfc_shdlc_connect_timeout(unsigned long data)
-{
- struct nfc_shdlc *shdlc = (struct nfc_shdlc *)data;
-
- pr_debug("\n");
-
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
-}
-
-static void nfc_shdlc_t1_timeout(unsigned long data)
-{
- struct nfc_shdlc *shdlc = (struct nfc_shdlc *)data;
-
- pr_debug("SoftIRQ: need to send ack\n");
-
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
-}
-
-static void nfc_shdlc_t2_timeout(unsigned long data)
-{
- struct nfc_shdlc *shdlc = (struct nfc_shdlc *)data;
-
- pr_debug("SoftIRQ: need to retransmit\n");
-
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
-}
-
-static void nfc_shdlc_sm_work(struct work_struct *work)
-{
- struct nfc_shdlc *shdlc = container_of(work, struct nfc_shdlc, sm_work);
- int r;
-
- pr_debug("\n");
-
- mutex_lock(&shdlc->state_mutex);
-
- switch (shdlc->state) {
- case SHDLC_DISCONNECTED:
- skb_queue_purge(&shdlc->rcv_q);
- skb_queue_purge(&shdlc->send_q);
- skb_queue_purge(&shdlc->ack_pending_q);
- break;
- case SHDLC_CONNECTING:
- if (shdlc->hard_fault) {
- nfc_shdlc_connect_complete(shdlc, shdlc->hard_fault);
- break;
- }
-
- if (shdlc->connect_tries++ < 5)
- r = nfc_shdlc_connect_initiate(shdlc);
- else
- r = -ETIME;
- if (r < 0)
- nfc_shdlc_connect_complete(shdlc, r);
- else {
- mod_timer(&shdlc->connect_timer, jiffies +
- msecs_to_jiffies(SHDLC_CONNECT_VALUE_MS));
-
- shdlc->state = SHDLC_NEGOCIATING;
- }
- break;
- case SHDLC_NEGOCIATING:
- if (timer_pending(&shdlc->connect_timer) == 0) {
- shdlc->state = SHDLC_CONNECTING;
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
- }
-
- nfc_shdlc_handle_rcv_queue(shdlc);
-
- if (shdlc->hard_fault) {
- nfc_shdlc_connect_complete(shdlc, shdlc->hard_fault);
- break;
- }
- break;
- case SHDLC_CONNECTED:
- nfc_shdlc_handle_rcv_queue(shdlc);
- nfc_shdlc_handle_send_queue(shdlc);
-
- if (shdlc->t1_active && timer_pending(&shdlc->t1_timer) == 0) {
- pr_debug
- ("Handle T1(send ack) elapsed (T1 now inactive)\n");
-
- shdlc->t1_active = false;
- r = nfc_shdlc_send_s_frame(shdlc, S_FRAME_RR,
- shdlc->nr);
- if (r < 0)
- shdlc->hard_fault = r;
- }
-
- if (shdlc->t2_active && timer_pending(&shdlc->t2_timer) == 0) {
- pr_debug
- ("Handle T2(retransmit) elapsed (T2 inactive)\n");
-
- shdlc->t2_active = false;
-
- nfc_shdlc_requeue_ack_pending(shdlc);
- nfc_shdlc_handle_send_queue(shdlc);
- }
-
- if (shdlc->hard_fault) {
- nfc_hci_driver_failure(shdlc->hdev, shdlc->hard_fault);
- }
- break;
- default:
- break;
- }
- mutex_unlock(&shdlc->state_mutex);
-}
-
-/*
- * Called from syscall context to establish shdlc link. Sleeps until
- * link is ready or failure.
- */
-static int nfc_shdlc_connect(struct nfc_shdlc *shdlc)
-{
- DECLARE_WAIT_QUEUE_HEAD_ONSTACK(connect_wq);
-
- pr_debug("\n");
-
- mutex_lock(&shdlc->state_mutex);
-
- shdlc->state = SHDLC_CONNECTING;
- shdlc->connect_wq = &connect_wq;
- shdlc->connect_tries = 0;
- shdlc->connect_result = 1;
-
- mutex_unlock(&shdlc->state_mutex);
-
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
-
- wait_event(connect_wq, shdlc->connect_result != 1);
-
- return shdlc->connect_result;
-}
-
-static void nfc_shdlc_disconnect(struct nfc_shdlc *shdlc)
-{
- pr_debug("\n");
-
- mutex_lock(&shdlc->state_mutex);
-
- shdlc->state = SHDLC_DISCONNECTED;
-
- mutex_unlock(&shdlc->state_mutex);
-
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
-}
-
-/*
- * Receive an incoming shdlc frame. Frame has already been crc-validated.
- * skb contains only LLC header and payload.
- * If skb == NULL, it is a notification that the link below is dead.
- */
-void nfc_shdlc_recv_frame(struct nfc_shdlc *shdlc, struct sk_buff *skb)
-{
- if (skb == NULL) {
- pr_err("NULL Frame -> link is dead\n");
- shdlc->hard_fault = -EREMOTEIO;
- } else {
- SHDLC_DUMP_SKB("incoming frame", skb);
- skb_queue_tail(&shdlc->rcv_q, skb);
- }
-
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
-}
-EXPORT_SYMBOL(nfc_shdlc_recv_frame);
-
-static int nfc_shdlc_open(struct nfc_hci_dev *hdev)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
- int r;
-
- pr_debug("\n");
-
- if (shdlc->ops->open) {
- r = shdlc->ops->open(shdlc);
- if (r < 0)
- return r;
- }
-
- r = nfc_shdlc_connect(shdlc);
- if (r < 0 && shdlc->ops->close)
- shdlc->ops->close(shdlc);
-
- return r;
-}
-
-static void nfc_shdlc_close(struct nfc_hci_dev *hdev)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
- pr_debug("\n");
-
- nfc_shdlc_disconnect(shdlc);
-
- if (shdlc->ops->close)
- shdlc->ops->close(shdlc);
-}
-
-static int nfc_shdlc_hci_ready(struct nfc_hci_dev *hdev)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
- int r = 0;
-
- pr_debug("\n");
-
- if (shdlc->ops->hci_ready)
- r = shdlc->ops->hci_ready(shdlc);
-
- return r;
-}
-
-static int nfc_shdlc_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
- SHDLC_DUMP_SKB("queuing HCP packet to shdlc", skb);
-
- skb_queue_tail(&shdlc->send_q, skb);
-
- queue_work(shdlc->sm_wq, &shdlc->sm_work);
-
- return 0;
-}
-
-static int nfc_shdlc_start_poll(struct nfc_hci_dev *hdev,
- u32 im_protocols, u32 tm_protocols)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
- pr_debug("\n");
-
- if (shdlc->ops->start_poll)
- return shdlc->ops->start_poll(shdlc,
- im_protocols, tm_protocols);
-
- return 0;
-}
-
-static int nfc_shdlc_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
- struct nfc_target *target)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
- if (shdlc->ops->target_from_gate)
- return shdlc->ops->target_from_gate(shdlc, gate, target);
-
- return -EPERM;
-}
-
-static int nfc_shdlc_complete_target_discovered(struct nfc_hci_dev *hdev,
- u8 gate,
- struct nfc_target *target)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
- pr_debug("\n");
-
- if (shdlc->ops->complete_target_discovered)
- return shdlc->ops->complete_target_discovered(shdlc, gate,
- target);
-
- return 0;
-}
-
-static int nfc_shdlc_data_exchange(struct nfc_hci_dev *hdev,
- struct nfc_target *target,
- struct sk_buff *skb,
- struct sk_buff **res_skb)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
- if (shdlc->ops->data_exchange)
- return shdlc->ops->data_exchange(shdlc, target, skb, res_skb);
-
- return -EPERM;
-}
-
-static int nfc_shdlc_check_presence(struct nfc_hci_dev *hdev,
- struct nfc_target *target)
-{
- struct nfc_shdlc *shdlc = nfc_hci_get_clientdata(hdev);
-
- if (shdlc->ops->check_presence)
- return shdlc->ops->check_presence(shdlc, target);
-
- return 0;
-}
-
-static struct nfc_hci_ops shdlc_ops = {
- .open = nfc_shdlc_open,
- .close = nfc_shdlc_close,
- .hci_ready = nfc_shdlc_hci_ready,
- .xmit = nfc_shdlc_xmit,
- .start_poll = nfc_shdlc_start_poll,
- .target_from_gate = nfc_shdlc_target_from_gate,
- .complete_target_discovered = nfc_shdlc_complete_target_discovered,
- .data_exchange = nfc_shdlc_data_exchange,
- .check_presence = nfc_shdlc_check_presence,
-};
-
-struct nfc_shdlc *nfc_shdlc_allocate(struct nfc_shdlc_ops *ops,
- struct nfc_hci_init_data *init_data,
- u32 protocols,
- int tx_headroom, int tx_tailroom,
- int max_link_payload, const char *devname)
-{
- struct nfc_shdlc *shdlc;
- int r;
- char name[32];
-
- if (ops->xmit == NULL)
- return NULL;
-
- shdlc = kzalloc(sizeof(struct nfc_shdlc), GFP_KERNEL);
- if (shdlc == NULL)
- return NULL;
-
- mutex_init(&shdlc->state_mutex);
- shdlc->ops = ops;
- shdlc->state = SHDLC_DISCONNECTED;
-
- init_timer(&shdlc->connect_timer);
- shdlc->connect_timer.data = (unsigned long)shdlc;
- shdlc->connect_timer.function = nfc_shdlc_connect_timeout;
-
- init_timer(&shdlc->t1_timer);
- shdlc->t1_timer.data = (unsigned long)shdlc;
- shdlc->t1_timer.function = nfc_shdlc_t1_timeout;
-
- init_timer(&shdlc->t2_timer);
- shdlc->t2_timer.data = (unsigned long)shdlc;
- shdlc->t2_timer.function = nfc_shdlc_t2_timeout;
-
- shdlc->w = SHDLC_MAX_WINDOW;
- shdlc->srej_support = SHDLC_SREJ_SUPPORT;
-
- skb_queue_head_init(&shdlc->rcv_q);
- skb_queue_head_init(&shdlc->send_q);
- skb_queue_head_init(&shdlc->ack_pending_q);
-
- INIT_WORK(&shdlc->sm_work, nfc_shdlc_sm_work);
- snprintf(name, sizeof(name), "%s_shdlc_sm_wq", devname);
- shdlc->sm_wq = alloc_workqueue(name, WQ_NON_REENTRANT | WQ_UNBOUND |
- WQ_MEM_RECLAIM, 1);
- if (shdlc->sm_wq == NULL)
- goto err_allocwq;
-
- shdlc->client_headroom = tx_headroom;
- shdlc->client_tailroom = tx_tailroom;
-
- shdlc->hdev = nfc_hci_allocate_device(&shdlc_ops, init_data, protocols,
- tx_headroom + SHDLC_LLC_HEAD_ROOM,
- tx_tailroom + SHDLC_LLC_TAIL_ROOM,
- max_link_payload);
- if (shdlc->hdev == NULL)
- goto err_allocdev;
-
- nfc_hci_set_clientdata(shdlc->hdev, shdlc);
-
- r = nfc_hci_register_device(shdlc->hdev);
- if (r < 0)
- goto err_regdev;
-
- return shdlc;
-
-err_regdev:
- nfc_hci_free_device(shdlc->hdev);
-
-err_allocdev:
- destroy_workqueue(shdlc->sm_wq);
-
-err_allocwq:
- kfree(shdlc);
-
- return NULL;
-}
-EXPORT_SYMBOL(nfc_shdlc_allocate);
-
-void nfc_shdlc_free(struct nfc_shdlc *shdlc)
-{
- pr_debug("\n");
-
- nfc_hci_unregister_device(shdlc->hdev);
- nfc_hci_free_device(shdlc->hdev);
-
- destroy_workqueue(shdlc->sm_wq);
-
- skb_queue_purge(&shdlc->rcv_q);
- skb_queue_purge(&shdlc->send_q);
- skb_queue_purge(&shdlc->ack_pending_q);
-
- kfree(shdlc);
-}
-EXPORT_SYMBOL(nfc_shdlc_free);
-
-void nfc_shdlc_set_clientdata(struct nfc_shdlc *shdlc, void *clientdata)
-{
- pr_debug("\n");
-
- shdlc->clientdata = clientdata;
-}
-EXPORT_SYMBOL(nfc_shdlc_set_clientdata);
-
-void *nfc_shdlc_get_clientdata(struct nfc_shdlc *shdlc)
-{
- return shdlc->clientdata;
-}
-EXPORT_SYMBOL(nfc_shdlc_get_clientdata);
-
-struct nfc_hci_dev *nfc_shdlc_get_hci_dev(struct nfc_shdlc *shdlc)
-{
- return shdlc->hdev;
-}
-EXPORT_SYMBOL(nfc_shdlc_get_hci_dev);
diff --git a/net/nfc/llcp/commands.c b/net/nfc/llcp/commands.c
index b982b5b..c45ccd6 100644
--- a/net/nfc/llcp/commands.c
+++ b/net/nfc/llcp/commands.c
@@ -312,6 +312,8 @@
skb = llcp_add_header(skb, 0, 0, LLCP_PDU_SYMM);
+ nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_TX);
+
return nfc_data_exchange(dev, local->target_idx, skb,
nfc_llcp_recv, local);
}
diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index 82f0f75..c12c5ef 100644
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -56,7 +56,7 @@
sk_for_each_safe(sk, node, tmp, &local->sockets.head) {
llcp_sock = nfc_llcp_sock(sk);
- lock_sock(sk);
+ bh_lock_sock(sk);
if (sk->sk_state == LLCP_CONNECTED)
nfc_put_device(llcp_sock->dev);
@@ -68,26 +68,26 @@
list_for_each_entry_safe(lsk, n, &llcp_sock->accept_queue,
accept_queue) {
accept_sk = &lsk->sk;
- lock_sock(accept_sk);
+ bh_lock_sock(accept_sk);
nfc_llcp_accept_unlink(accept_sk);
accept_sk->sk_state = LLCP_CLOSED;
- release_sock(accept_sk);
+ bh_unlock_sock(accept_sk);
sock_orphan(accept_sk);
}
if (listen == true) {
- release_sock(sk);
+ bh_unlock_sock(sk);
continue;
}
}
sk->sk_state = LLCP_CLOSED;
- release_sock(sk);
+ bh_unlock_sock(sk);
sock_orphan(sk);
@@ -114,9 +114,9 @@
nfc_llcp_socket_release(local, false);
del_timer_sync(&local->link_timer);
skb_queue_purge(&local->tx_queue);
- destroy_workqueue(local->tx_wq);
- destroy_workqueue(local->rx_wq);
- destroy_workqueue(local->timeout_wq);
+ cancel_work_sync(&local->tx_work);
+ cancel_work_sync(&local->rx_work);
+ cancel_work_sync(&local->timeout_work);
kfree_skb(local->rx_pending);
kfree(local);
}
@@ -181,7 +181,7 @@
pr_err("SYMM timeout\n");
- queue_work(local->timeout_wq, &local->timeout_work);
+ queue_work(system_nrt_wq, &local->timeout_work);
}
struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev)
@@ -426,6 +426,7 @@
u8 *miux_tlv, miux_length;
__be16 miux;
u8 gb_len = 0;
+ int ret = 0;
version = LLCP_VERSION_11;
version_tlv = nfc_llcp_build_tlv(LLCP_TLV_VERSION, &version,
@@ -450,8 +451,8 @@
gb_len += ARRAY_SIZE(llcp_magic);
if (gb_len > NFC_MAX_GT_LEN) {
- kfree(version_tlv);
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
gb_cur = local->gb;
@@ -471,12 +472,15 @@
memcpy(gb_cur, miux_tlv, miux_length);
gb_cur += miux_length;
- kfree(version_tlv);
- kfree(lto_tlv);
-
local->gb_len = gb_len;
- return 0;
+out:
+ kfree(version_tlv);
+ kfree(lto_tlv);
+ kfree(wks_tlv);
+ kfree(miux_tlv);
+
+ return ret;
}
u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len)
@@ -554,6 +558,46 @@
sock->recv_ack_n = (sock->recv_n - 1) % 16;
}
+void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local,
+ struct sk_buff *skb, u8 direction)
+{
+ struct hlist_node *node;
+ struct sk_buff *skb_copy = NULL, *nskb;
+ struct sock *sk;
+ u8 *data;
+
+ read_lock(&local->raw_sockets.lock);
+
+ sk_for_each(sk, node, &local->raw_sockets.head) {
+ if (sk->sk_state != LLCP_BOUND)
+ continue;
+
+ if (skb_copy == NULL) {
+ skb_copy = __pskb_copy(skb, NFC_LLCP_RAW_HEADER_SIZE,
+ GFP_ATOMIC);
+
+ if (skb_copy == NULL)
+ continue;
+
+ data = skb_push(skb_copy, NFC_LLCP_RAW_HEADER_SIZE);
+
+ data[0] = local->dev ? local->dev->idx : 0xFF;
+ data[1] = direction;
+ }
+
+ nskb = skb_clone(skb_copy, GFP_ATOMIC);
+ if (!nskb)
+ continue;
+
+ if (sock_queue_rcv_skb(sk, nskb))
+ kfree_skb(nskb);
+ }
+
+ read_unlock(&local->raw_sockets.lock);
+
+ kfree_skb(skb_copy);
+}
+
static void nfc_llcp_tx_work(struct work_struct *work)
{
struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local,
@@ -574,6 +618,9 @@
DUMP_PREFIX_OFFSET, 16, 1,
skb->data, skb->len, true);
+ nfc_llcp_send_to_raw_sock(local, skb,
+ NFC_LLCP_DIRECTION_TX);
+
ret = nfc_data_exchange(local->dev, local->target_idx,
skb, nfc_llcp_recv, local);
@@ -1018,6 +1065,8 @@
print_hex_dump(KERN_DEBUG, "LLCP Rx: ", DUMP_PREFIX_OFFSET,
16, 1, skb->data, skb->len, true);
+ nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_RX);
+
switch (ptype) {
case LLCP_PDU_SYMM:
pr_debug("SYMM\n");
@@ -1052,7 +1101,7 @@
}
- queue_work(local->tx_wq, &local->tx_work);
+ queue_work(system_nrt_wq, &local->tx_work);
kfree_skb(local->rx_pending);
local->rx_pending = NULL;
@@ -1071,7 +1120,7 @@
local->rx_pending = skb_get(skb);
del_timer(&local->link_timer);
- queue_work(local->rx_wq, &local->rx_work);
+ queue_work(system_nrt_wq, &local->rx_work);
return;
}
@@ -1086,7 +1135,7 @@
local->rx_pending = skb_get(skb);
del_timer(&local->link_timer);
- queue_work(local->rx_wq, &local->rx_work);
+ queue_work(system_nrt_wq, &local->rx_work);
return 0;
}
@@ -1121,7 +1170,7 @@
if (rf_mode == NFC_RF_INITIATOR) {
pr_debug("Queueing Tx work\n");
- queue_work(local->tx_wq, &local->tx_work);
+ queue_work(system_nrt_wq, &local->tx_work);
} else {
mod_timer(&local->link_timer,
jiffies + msecs_to_jiffies(local->remote_lto));
@@ -1130,10 +1179,7 @@
int nfc_llcp_register_device(struct nfc_dev *ndev)
{
- struct device *dev = &ndev->dev;
struct nfc_llcp_local *local;
- char name[32];
- int err;
local = kzalloc(sizeof(struct nfc_llcp_local), GFP_KERNEL);
if (local == NULL)
@@ -1149,41 +1195,15 @@
skb_queue_head_init(&local->tx_queue);
INIT_WORK(&local->tx_work, nfc_llcp_tx_work);
- snprintf(name, sizeof(name), "%s_llcp_tx_wq", dev_name(dev));
- local->tx_wq =
- alloc_workqueue(name,
- WQ_NON_REENTRANT | WQ_UNBOUND | WQ_MEM_RECLAIM,
- 1);
- if (local->tx_wq == NULL) {
- err = -ENOMEM;
- goto err_local;
- }
local->rx_pending = NULL;
INIT_WORK(&local->rx_work, nfc_llcp_rx_work);
- snprintf(name, sizeof(name), "%s_llcp_rx_wq", dev_name(dev));
- local->rx_wq =
- alloc_workqueue(name,
- WQ_NON_REENTRANT | WQ_UNBOUND | WQ_MEM_RECLAIM,
- 1);
- if (local->rx_wq == NULL) {
- err = -ENOMEM;
- goto err_tx_wq;
- }
INIT_WORK(&local->timeout_work, nfc_llcp_timeout_work);
- snprintf(name, sizeof(name), "%s_llcp_timeout_wq", dev_name(dev));
- local->timeout_wq =
- alloc_workqueue(name,
- WQ_NON_REENTRANT | WQ_UNBOUND | WQ_MEM_RECLAIM,
- 1);
- if (local->timeout_wq == NULL) {
- err = -ENOMEM;
- goto err_rx_wq;
- }
- local->sockets.lock = __RW_LOCK_UNLOCKED(local->sockets.lock);
- local->connecting_sockets.lock = __RW_LOCK_UNLOCKED(local->connecting_sockets.lock);
+ rwlock_init(&local->sockets.lock);
+ rwlock_init(&local->connecting_sockets.lock);
+ rwlock_init(&local->raw_sockets.lock);
nfc_llcp_build_gb(local);
@@ -1193,17 +1213,6 @@
list_add(&llcp_devices, &local->list);
return 0;
-
-err_rx_wq:
- destroy_workqueue(local->rx_wq);
-
-err_tx_wq:
- destroy_workqueue(local->tx_wq);
-
-err_local:
- kfree(local);
-
- return 0;
}
void nfc_llcp_unregister_device(struct nfc_dev *dev)
diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h
index 83b8bba..fdb2d24 100644
--- a/net/nfc/llcp/llcp.h
+++ b/net/nfc/llcp/llcp.h
@@ -56,12 +56,9 @@
struct timer_list link_timer;
struct sk_buff_head tx_queue;
- struct workqueue_struct *tx_wq;
struct work_struct tx_work;
- struct workqueue_struct *rx_wq;
struct work_struct rx_work;
struct sk_buff *rx_pending;
- struct workqueue_struct *timeout_wq;
struct work_struct timeout_work;
u32 target_idx;
@@ -89,6 +86,7 @@
/* sockets array */
struct llcp_sock_list sockets;
struct llcp_sock_list connecting_sockets;
+ struct llcp_sock_list raw_sockets;
};
struct nfc_llcp_sock {
@@ -187,6 +185,8 @@
u8 nfc_llcp_get_local_ssap(struct nfc_llcp_local *local);
void nfc_llcp_put_ssap(struct nfc_llcp_local *local, u8 ssap);
int nfc_llcp_queue_i_frames(struct nfc_llcp_sock *sock);
+void nfc_llcp_send_to_raw_sock(struct nfc_llcp_local *local,
+ struct sk_buff *skb, u8 direction);
/* Sock API */
struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp);
diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c
index ddeb9aa..40f056d 100644
--- a/net/nfc/llcp/sock.c
+++ b/net/nfc/llcp/sock.c
@@ -142,6 +142,60 @@
return ret;
}
+static int llcp_raw_sock_bind(struct socket *sock, struct sockaddr *addr,
+ int alen)
+{
+ struct sock *sk = sock->sk;
+ struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
+ struct nfc_llcp_local *local;
+ struct nfc_dev *dev;
+ struct sockaddr_nfc_llcp llcp_addr;
+ int len, ret = 0;
+
+ if (!addr || addr->sa_family != AF_NFC)
+ return -EINVAL;
+
+ pr_debug("sk %p addr %p family %d\n", sk, addr, addr->sa_family);
+
+ memset(&llcp_addr, 0, sizeof(llcp_addr));
+ len = min_t(unsigned int, sizeof(llcp_addr), alen);
+ memcpy(&llcp_addr, addr, len);
+
+ lock_sock(sk);
+
+ if (sk->sk_state != LLCP_CLOSED) {
+ ret = -EBADFD;
+ goto error;
+ }
+
+ dev = nfc_get_device(llcp_addr.dev_idx);
+ if (dev == NULL) {
+ ret = -ENODEV;
+ goto error;
+ }
+
+ local = nfc_llcp_find_local(dev);
+ if (local == NULL) {
+ ret = -ENODEV;
+ goto put_dev;
+ }
+
+ llcp_sock->dev = dev;
+ llcp_sock->local = nfc_llcp_local_get(local);
+ llcp_sock->nfc_protocol = llcp_addr.nfc_protocol;
+
+ nfc_llcp_sock_link(&local->raw_sockets, sk);
+
+ sk->sk_state = LLCP_BOUND;
+
+put_dev:
+ nfc_put_device(dev);
+
+error:
+ release_sock(sk);
+ return ret;
+}
+
static int llcp_sock_listen(struct socket *sock, int backlog)
{
struct sock *sk = sock->sk;
@@ -300,9 +354,6 @@
pr_debug("%p %d %d %d\n", sk, llcp_sock->target_idx,
llcp_sock->dsap, llcp_sock->ssap);
- if (llcp_sock == NULL || llcp_sock->dev == NULL)
- return -EBADFD;
-
uaddr->sa_family = AF_NFC;
*len = sizeof(struct sockaddr_nfc_llcp);
@@ -421,7 +472,10 @@
release_sock(sk);
- nfc_llcp_sock_unlink(&local->sockets, sk);
+ if (sock->type == SOCK_RAW)
+ nfc_llcp_sock_unlink(&local->raw_sockets, sk);
+ else
+ nfc_llcp_sock_unlink(&local->sockets, sk);
out:
sock_orphan(sk);
@@ -617,7 +671,7 @@
if (!(flags & MSG_PEEK)) {
/* SOCK_STREAM: re-queue skb if it contains unreceived data */
- if (sk->sk_type == SOCK_STREAM) {
+ if (sk->sk_type == SOCK_STREAM || sk->sk_type == SOCK_RAW) {
skb_pull(skb, copied);
if (skb->len) {
skb_queue_head(&sk->sk_receive_queue, skb);
@@ -658,6 +712,26 @@
.mmap = sock_no_mmap,
};
+static const struct proto_ops llcp_rawsock_ops = {
+ .family = PF_NFC,
+ .owner = THIS_MODULE,
+ .bind = llcp_raw_sock_bind,
+ .connect = sock_no_connect,
+ .release = llcp_sock_release,
+ .socketpair = sock_no_socketpair,
+ .accept = sock_no_accept,
+ .getname = llcp_sock_getname,
+ .poll = llcp_sock_poll,
+ .ioctl = sock_no_ioctl,
+ .listen = sock_no_listen,
+ .shutdown = sock_no_shutdown,
+ .setsockopt = sock_no_setsockopt,
+ .getsockopt = sock_no_getsockopt,
+ .sendmsg = sock_no_sendmsg,
+ .recvmsg = llcp_sock_recvmsg,
+ .mmap = sock_no_mmap,
+};
+
static void llcp_sock_destruct(struct sock *sk)
{
struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
@@ -735,10 +809,15 @@
pr_debug("%p\n", sock);
- if (sock->type != SOCK_STREAM && sock->type != SOCK_DGRAM)
+ if (sock->type != SOCK_STREAM &&
+ sock->type != SOCK_DGRAM &&
+ sock->type != SOCK_RAW)
return -ESOCKTNOSUPPORT;
- sock->ops = &llcp_sock_ops;
+ if (sock->type == SOCK_RAW)
+ sock->ops = &llcp_rawsock_ops;
+ else
+ sock->ops = &llcp_sock_ops;
sk = nfc_llcp_sock_alloc(sock, sock->type, GFP_ATOMIC);
if (sk == NULL)
diff --git a/net/nfc/nci/core.c b/net/nfc/nci/core.c
index f81efe1..acf9abb 100644
--- a/net/nfc/nci/core.c
+++ b/net/nfc/nci/core.c
@@ -176,6 +176,27 @@
(1 + ((*num) * sizeof(struct disc_map_config))), &cmd);
}
+struct nci_set_config_param {
+ __u8 id;
+ size_t len;
+ __u8 *val;
+};
+
+static void nci_set_config_req(struct nci_dev *ndev, unsigned long opt)
+{
+ struct nci_set_config_param *param = (struct nci_set_config_param *)opt;
+ struct nci_core_set_config_cmd cmd;
+
+ BUG_ON(param->len > NCI_MAX_PARAM_LEN);
+
+ cmd.num_params = 1;
+ cmd.param.id = param->id;
+ cmd.param.len = param->len;
+ memcpy(cmd.param.val, param->val, param->len);
+
+ nci_send_cmd(ndev, NCI_OP_CORE_SET_CONFIG_CMD, (3 + param->len), &cmd);
+}
+
static void nci_rf_discover_req(struct nci_dev *ndev, unsigned long opt)
{
struct nci_rf_disc_cmd cmd;
@@ -388,6 +409,32 @@
return nci_close_device(ndev);
}
+static int nci_set_local_general_bytes(struct nfc_dev *nfc_dev)
+{
+ struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
+ struct nci_set_config_param param;
+ __u8 local_gb[NFC_MAX_GT_LEN];
+ int i, rc = 0;
+
+ param.val = nfc_get_local_general_bytes(nfc_dev, ¶m.len);
+ if ((param.val == NULL) || (param.len == 0))
+ return rc;
+
+ if (param.len > NCI_MAX_PARAM_LEN)
+ return -EINVAL;
+
+ for (i = 0; i < param.len; i++)
+ local_gb[param.len-1-i] = param.val[i];
+
+ param.id = NCI_PN_ATR_REQ_GEN_BYTES;
+ param.val = local_gb;
+
+ rc = nci_request(ndev, nci_set_config_req, (unsigned long)¶m,
+ msecs_to_jiffies(NCI_SET_CONFIG_TIMEOUT));
+
+ return rc;
+}
+
static int nci_start_poll(struct nfc_dev *nfc_dev,
__u32 im_protocols, __u32 tm_protocols)
{
@@ -415,6 +462,14 @@
return -EBUSY;
}
+ if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
+ rc = nci_set_local_general_bytes(nfc_dev);
+ if (rc) {
+ pr_err("failed to set local general bytes\n");
+ return rc;
+ }
+ }
+
rc = nci_request(ndev, nci_rf_discover_req, im_protocols,
msecs_to_jiffies(NCI_RF_DISC_TIMEOUT));
@@ -509,7 +564,7 @@
{
struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
- pr_debug("target_idx %d\n", target->idx);
+ pr_debug("entry\n");
if (!ndev->target_active_prot) {
pr_err("unable to deactivate target, no active target\n");
@@ -524,6 +579,38 @@
}
}
+
+static int nci_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
+ __u8 comm_mode, __u8 *gb, size_t gb_len)
+{
+ struct nci_dev *ndev = nfc_get_drvdata(nfc_dev);
+ int rc;
+
+ pr_debug("target_idx %d, comm_mode %d\n", target->idx, comm_mode);
+
+ rc = nci_activate_target(nfc_dev, target, NFC_PROTO_NFC_DEP);
+ if (rc)
+ return rc;
+
+ rc = nfc_set_remote_general_bytes(nfc_dev, ndev->remote_gb,
+ ndev->remote_gb_len);
+ if (!rc)
+ rc = nfc_dep_link_is_up(nfc_dev, target->idx, NFC_COMM_PASSIVE,
+ NFC_RF_INITIATOR);
+
+ return rc;
+}
+
+static int nci_dep_link_down(struct nfc_dev *nfc_dev)
+{
+ pr_debug("entry\n");
+
+ nci_deactivate_target(nfc_dev, NULL);
+
+ return 0;
+}
+
+
static int nci_transceive(struct nfc_dev *nfc_dev, struct nfc_target *target,
struct sk_buff *skb,
data_exchange_cb_t cb, void *cb_context)
@@ -557,6 +644,8 @@
.dev_down = nci_dev_down,
.start_poll = nci_start_poll,
.stop_poll = nci_stop_poll,
+ .dep_link_up = nci_dep_link_up,
+ .dep_link_down = nci_dep_link_down,
.activate_target = nci_activate_target,
.deactivate_target = nci_deactivate_target,
.im_transceive = nci_transceive,
diff --git a/net/nfc/nci/ntf.c b/net/nfc/nci/ntf.c
index af7a93b..b2aa98e 100644
--- a/net/nfc/nci/ntf.c
+++ b/net/nfc/nci/ntf.c
@@ -176,6 +176,8 @@
protocol = NFC_PROTO_ISO14443_B_MASK;
else if (rf_protocol == NCI_RF_PROTOCOL_T3T)
protocol = NFC_PROTO_FELICA_MASK;
+ else if (rf_protocol == NCI_RF_PROTOCOL_NFC_DEP)
+ protocol = NFC_PROTO_NFC_DEP_MASK;
else
protocol = 0;
@@ -361,6 +363,33 @@
return NCI_STATUS_OK;
}
+static int nci_extract_activation_params_nfc_dep(struct nci_dev *ndev,
+ struct nci_rf_intf_activated_ntf *ntf, __u8 *data)
+{
+ struct activation_params_poll_nfc_dep *poll;
+ int i;
+
+ switch (ntf->activation_rf_tech_and_mode) {
+ case NCI_NFC_A_PASSIVE_POLL_MODE:
+ case NCI_NFC_F_PASSIVE_POLL_MODE:
+ poll = &ntf->activation_params.poll_nfc_dep;
+ poll->atr_res_len = min_t(__u8, *data++, 63);
+ pr_debug("atr_res_len %d\n", poll->atr_res_len);
+ if (poll->atr_res_len > 0) {
+ for (i = 0; i < poll->atr_res_len; i++)
+ poll->atr_res[poll->atr_res_len-1-i] = data[i];
+ }
+ break;
+
+ default:
+ pr_err("unsupported activation_rf_tech_and_mode 0x%x\n",
+ ntf->activation_rf_tech_and_mode);
+ return NCI_STATUS_RF_PROTOCOL_ERROR;
+ }
+
+ return NCI_STATUS_OK;
+}
+
static void nci_target_auto_activated(struct nci_dev *ndev,
struct nci_rf_intf_activated_ntf *ntf)
{
@@ -454,6 +483,11 @@
&ntf, data);
break;
+ case NCI_RF_INTERFACE_NFC_DEP:
+ err = nci_extract_activation_params_nfc_dep(ndev,
+ &ntf, data);
+ break;
+
case NCI_RF_INTERFACE_FRAME:
/* no activation params */
break;
@@ -473,6 +507,24 @@
/* set the available credits to initial value */
atomic_set(&ndev->credits_cnt, ndev->initial_num_credits);
+
+ /* store general bytes to be reported later in dep_link_up */
+ if (ntf.rf_interface == NCI_RF_INTERFACE_NFC_DEP) {
+ ndev->remote_gb_len = 0;
+
+ if (ntf.activation_params_len > 0) {
+ /* ATR_RES general bytes at offset 15 */
+ ndev->remote_gb_len = min_t(__u8,
+ (ntf.activation_params
+ .poll_nfc_dep.atr_res_len
+ - NFC_ATR_RES_GT_OFFSET),
+ NFC_MAX_GT_LEN);
+ memcpy(ndev->remote_gb,
+ (ntf.activation_params.poll_nfc_dep
+ .atr_res + NFC_ATR_RES_GT_OFFSET),
+ ndev->remote_gb_len);
+ }
+ }
}
if (atomic_read(&ndev->state) == NCI_DISCOVERY) {
diff --git a/net/nfc/nci/rsp.c b/net/nfc/nci/rsp.c
index 3003c33..dd072f3 100644
--- a/net/nfc/nci/rsp.c
+++ b/net/nfc/nci/rsp.c
@@ -119,6 +119,16 @@
nci_req_complete(ndev, rsp_1->status);
}
+static void nci_core_set_config_rsp_packet(struct nci_dev *ndev,
+ struct sk_buff *skb)
+{
+ struct nci_core_set_config_rsp *rsp = (void *) skb->data;
+
+ pr_debug("status 0x%x\n", rsp->status);
+
+ nci_req_complete(ndev, rsp->status);
+}
+
static void nci_rf_disc_map_rsp_packet(struct nci_dev *ndev,
struct sk_buff *skb)
{
@@ -194,6 +204,10 @@
nci_core_init_rsp_packet(ndev, skb);
break;
+ case NCI_OP_CORE_SET_CONFIG_RSP:
+ nci_core_set_config_rsp_packet(ndev, skb);
+ break;
+
case NCI_OP_RF_DISCOVER_MAP_RSP:
nci_rf_disc_map_rsp_packet(ndev, skb);
break;
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 4bbb70e..c1b5285 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -761,31 +761,63 @@
},
};
+
+struct urelease_work {
+ struct work_struct w;
+ int portid;
+};
+
+static void nfc_urelease_event_work(struct work_struct *work)
+{
+ struct urelease_work *w = container_of(work, struct urelease_work, w);
+ struct class_dev_iter iter;
+ struct nfc_dev *dev;
+
+ pr_debug("portid %d\n", w->portid);
+
+ mutex_lock(&nfc_devlist_mutex);
+
+ nfc_device_iter_init(&iter);
+ dev = nfc_device_iter_next(&iter);
+
+ while (dev) {
+ mutex_lock(&dev->genl_data.genl_data_mutex);
+
+ if (dev->genl_data.poll_req_portid == w->portid) {
+ nfc_stop_poll(dev);
+ dev->genl_data.poll_req_portid = 0;
+ }
+
+ mutex_unlock(&dev->genl_data.genl_data_mutex);
+
+ dev = nfc_device_iter_next(&iter);
+ }
+
+ nfc_device_iter_exit(&iter);
+
+ mutex_unlock(&nfc_devlist_mutex);
+
+ kfree(w);
+}
+
static int nfc_genl_rcv_nl_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct netlink_notify *n = ptr;
- struct class_dev_iter iter;
- struct nfc_dev *dev;
+ struct urelease_work *w;
if (event != NETLINK_URELEASE || n->protocol != NETLINK_GENERIC)
goto out;
pr_debug("NETLINK_URELEASE event from id %d\n", n->portid);
- nfc_device_iter_init(&iter);
- dev = nfc_device_iter_next(&iter);
-
- while (dev) {
- if (dev->genl_data.poll_req_portid == n->portid) {
- nfc_stop_poll(dev);
- dev->genl_data.poll_req_portid = 0;
- }
- dev = nfc_device_iter_next(&iter);
+ w = kmalloc(sizeof(*w), GFP_ATOMIC);
+ if (w) {
+ INIT_WORK((struct work_struct *) w, nfc_urelease_event_work);
+ w->portid = n->portid;
+ schedule_work((struct work_struct *) w);
}
- nfc_device_iter_exit(&iter);
-
out:
return NOTIFY_DONE;
}