--- /dev/null
+/* -----------------------------------------------------------------------------
+ * Copyright (c) 2011 Ozmo Inc
+ * Released under the GNU General Public License Version 2 (GPLv2).
+ * -----------------------------------------------------------------------------
+ */
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/timer.h>
+#include <linux/sched.h>
+#include <linux/netdevice.h>
+#include <linux/errno.h>
+#include <linux/ieee80211.h>
+#include "ozconfig.h"
+#include "ozprotocol.h"
+#include "ozeltbuf.h"
+#include "ozpd.h"
+#include "ozproto.h"
+#include "ozusbsvc.h"
+#include "oztrace.h"
+#include "ozappif.h"
+#include "ozevent.h"
+#include "ozalloc.h"
+#include <asm/unaligned.h>
+#include <linux/uaccess.h>
+#include <net/psnap.h>
+/*------------------------------------------------------------------------------
+ */
+#define OZ_CF_CONN_SUCCESS 1
+#define OZ_CF_CONN_FAILURE 2
+
+#define OZ_DO_STOP 1
+#define OZ_DO_SLEEP 2
+
+/* States of the timer.
+ */
+#define OZ_TIMER_IDLE 0
+#define OZ_TIMER_SET 1
+#define OZ_TIMER_IN_HANDLER 2
+
+#define OZ_MAX_TIMER_POOL_SIZE 16
+
+/*------------------------------------------------------------------------------
+ */
+struct oz_binding {
+ struct packet_type ptype;
+ char name[OZ_MAX_BINDING_LEN];
+ struct oz_binding *next;
+};
+
+struct oz_timer {
+ struct list_head link;
+ struct oz_pd *pd;
+ unsigned long due_time;
+ int type;
+};
+/*------------------------------------------------------------------------------
+ * Static external variables.
+ */
+static DEFINE_SPINLOCK(g_polling_lock);
+static LIST_HEAD(g_pd_list);
+static struct oz_binding *g_binding ;
+static DEFINE_SPINLOCK(g_binding_lock);
+static struct sk_buff_head g_rx_queue;
+static u8 g_session_id;
+static u16 g_apps = 0x1;
+static int g_processing_rx;
+static struct timer_list g_timer;
+static struct oz_timer *g_cur_timer;
+static struct list_head *g_timer_pool;
+static int g_timer_pool_count;
+static int g_timer_state = OZ_TIMER_IDLE;
+static LIST_HEAD(g_timer_list);
+/*------------------------------------------------------------------------------
+ */
+static void oz_protocol_timer_start(void);
+/*------------------------------------------------------------------------------
+ * Context: softirq-serialized
+ */
+static u8 oz_get_new_session_id(u8 exclude)
+{
+ if (++g_session_id == 0)
+ g_session_id = 1;
+ if (g_session_id == exclude) {
+ if (++g_session_id == 0)
+ g_session_id = 1;
+ }
+ return g_session_id;
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq-serialized
+ */
+static void oz_send_conn_rsp(struct oz_pd *pd, u8 status)
+{
+ struct sk_buff *skb;
+ struct net_device *dev = pd->net_dev;
+ struct oz_hdr *oz_hdr;
+ struct oz_elt *elt;
+ struct oz_elt_connect_rsp *body;
+ int sz = sizeof(struct oz_hdr) + sizeof(struct oz_elt) +
+ sizeof(struct oz_elt_connect_rsp);
+ skb = alloc_skb(sz + OZ_ALLOCATED_SPACE(dev), GFP_ATOMIC);
+ if (skb == 0)
+ return;
+ skb_reserve(skb, LL_RESERVED_SPACE(dev));
+ skb_reset_network_header(skb);
+ oz_hdr = (struct oz_hdr *)skb_put(skb, sz);
+ elt = (struct oz_elt *)(oz_hdr+1);
+ body = (struct oz_elt_connect_rsp *)(elt+1);
+ skb->dev = dev;
+ skb->protocol = htons(OZ_ETHERTYPE);
+ /* Fill in device header */
+ if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr,
+ dev->dev_addr, skb->len) < 0) {
+ kfree_skb(skb);
+ return;
+ }
+ oz_hdr->control = (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT);
+ oz_hdr->last_pkt_num = 0;
+ put_unaligned(0, &oz_hdr->pkt_num);
+ oz_event_log(OZ_EVT_CONNECT_RSP, 0, 0, 0, 0);
+ elt->type = OZ_ELT_CONNECT_RSP;
+ elt->length = sizeof(struct oz_elt_connect_rsp);
+ memset(body, 0, sizeof(struct oz_elt_connect_rsp));
+ body->status = status;
+ if (status == 0) {
+ body->mode = pd->mode;
+ body->session_id = pd->session_id;
+ put_unaligned(cpu_to_le16(pd->total_apps), &body->apps);
+ }
+ oz_trace("TX: OZ_ELT_CONNECT_RSP %d", status);
+ dev_queue_xmit(skb);
+ return;
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq-serialized
+ */
+static void pd_set_keepalive(struct oz_pd *pd, u8 kalive)
+{
+ unsigned long keep_alive = kalive & OZ_KALIVE_VALUE_MASK;
+
+ switch (kalive & OZ_KALIVE_TYPE_MASK) {
+ case OZ_KALIVE_SPECIAL:
+ pd->keep_alive_j =
+ oz_ms_to_jiffies(keep_alive * 1000*60*60*24*20);
+ break;
+ case OZ_KALIVE_SECS:
+ pd->keep_alive_j = oz_ms_to_jiffies(keep_alive*1000);
+ break;
+ case OZ_KALIVE_MINS:
+ pd->keep_alive_j = oz_ms_to_jiffies(keep_alive*1000*60);
+ break;
+ case OZ_KALIVE_HOURS:
+ pd->keep_alive_j = oz_ms_to_jiffies(keep_alive*1000*60*60);
+ break;
+ default:
+ pd->keep_alive_j = 0;
+ }
+ oz_trace("Keepalive = %lu jiffies\n", pd->keep_alive_j);
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq-serialized
+ */
+static void pd_set_presleep(struct oz_pd *pd, u8 presleep)
+{
+ if (presleep)
+ pd->presleep_j = oz_ms_to_jiffies(presleep*100);
+ else
+ pd->presleep_j = OZ_PRESLEEP_TOUT_J;
+ oz_trace("Presleep time = %lu jiffies\n", pd->presleep_j);
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq-serialized
+ */
+static struct oz_pd *oz_connect_req(struct oz_pd *cur_pd, struct oz_elt *elt,
+ u8 *pd_addr, struct net_device *net_dev)
+{
+ struct oz_pd *pd;
+ struct oz_elt_connect_req *body =
+ (struct oz_elt_connect_req *)(elt+1);
+ u8 rsp_status = OZ_STATUS_SUCCESS;
+ u8 stop_needed = 0;
+ u16 new_apps = g_apps;
+ struct net_device *old_net_dev = 0;
+ struct oz_pd *free_pd = 0;
+ if (cur_pd) {
+ pd = cur_pd;
+ spin_lock_bh(&g_polling_lock);
+ } else {
+ struct oz_pd *pd2 = 0;
+ struct list_head *e;
+ pd = oz_pd_alloc(pd_addr);
+ if (pd == 0)
+ return 0;
+ pd->last_rx_time_j = jiffies;
+ spin_lock_bh(&g_polling_lock);
+ list_for_each(e, &g_pd_list) {
+ pd2 = container_of(e, struct oz_pd, link);
+ if (memcmp(pd2->mac_addr, pd_addr, ETH_ALEN) == 0) {
+ free_pd = pd;
+ pd = pd2;
+ break;
+ }
+ }
+ if (pd != pd2)
+ list_add_tail(&pd->link, &g_pd_list);
+ }
+ if (pd == 0) {
+ spin_unlock_bh(&g_polling_lock);
+ return 0;
+ }
+ if (pd->net_dev != net_dev) {
+ old_net_dev = pd->net_dev;
+ dev_hold(net_dev);
+ pd->net_dev = net_dev;
+ }
+ oz_trace("Host vendor: %d\n", body->host_vendor);
+ pd->max_tx_size = OZ_MAX_TX_SIZE;
+ pd->mode = body->mode;
+ pd->pd_info = body->pd_info;
+ if (pd->mode & OZ_F_ISOC_NO_ELTS) {
+ pd->mode |= OZ_F_ISOC_ANYTIME;
+ pd->ms_per_isoc = body->ms_per_isoc;
+ if (!pd->ms_per_isoc)
+ pd->ms_per_isoc = 4;
+ }
+ if (body->max_len_div16)
+ pd->max_tx_size = ((u16)body->max_len_div16)<<4;
+ oz_trace("Max frame:%u Ms per isoc:%u\n",
+ pd->max_tx_size, pd->ms_per_isoc);
+ pd->max_stream_buffering = 3*1024;
+ pd->timeout_time_j = jiffies + OZ_CONNECTION_TOUT_J;
+ pd->pulse_period_j = OZ_QUANTUM_J;
+ pd_set_presleep(pd, body->presleep);
+ pd_set_keepalive(pd, body->keep_alive);
+
+ new_apps &= le16_to_cpu(get_unaligned(&body->apps));
+ if ((new_apps & 0x1) && (body->session_id)) {
+ if (pd->session_id) {
+ if (pd->session_id != body->session_id) {
+ rsp_status = OZ_STATUS_SESSION_MISMATCH;
+ goto done;
+ }
+ } else {
+ new_apps &= ~0x1; /* Resume not permitted */
+ pd->session_id =
+ oz_get_new_session_id(body->session_id);
+ }
+ } else {
+ if (pd->session_id && !body->session_id) {
+ rsp_status = OZ_STATUS_SESSION_TEARDOWN;
+ stop_needed = 1;
+ } else {
+ new_apps &= ~0x1; /* Resume not permitted */
+ pd->session_id =
+ oz_get_new_session_id(body->session_id);
+ }
+ }
+done:
+ if (rsp_status == OZ_STATUS_SUCCESS) {
+ u16 start_apps = new_apps & ~pd->total_apps & ~0x1;
+ u16 stop_apps = pd->total_apps & ~new_apps & ~0x1;
+ u16 resume_apps = new_apps & pd->paused_apps & ~0x1;
+ spin_unlock_bh(&g_polling_lock);
+ oz_pd_set_state(pd, OZ_PD_S_CONNECTED);
+ oz_timer_delete(pd, OZ_TIMER_STOP);
+ oz_trace("new_apps=0x%x total_apps=0x%x paused_apps=0x%x\n",
+ new_apps, pd->total_apps, pd->paused_apps);
+ if (start_apps) {
+ if (oz_services_start(pd, start_apps, 0))
+ rsp_status = OZ_STATUS_TOO_MANY_PDS;
+ }
+ if (resume_apps)
+ if (oz_services_start(pd, resume_apps, 1))
+ rsp_status = OZ_STATUS_TOO_MANY_PDS;
+ if (stop_apps)
+ oz_services_stop(pd, stop_apps, 0);
+ oz_pd_request_heartbeat(pd);
+ } else {
+ spin_unlock_bh(&g_polling_lock);
+ }
+ oz_send_conn_rsp(pd, rsp_status);
+ if (rsp_status != OZ_STATUS_SUCCESS) {
+ if (stop_needed)
+ oz_pd_stop(pd);
+ oz_pd_put(pd);
+ pd = 0;
+ }
+ if (old_net_dev)
+ dev_put(old_net_dev);
+ if (free_pd)
+ oz_pd_destroy(free_pd);
+ return pd;
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq-serialized
+ */
+static void oz_add_farewell(struct oz_pd *pd, u8 ep_num, u8 index,
+ u8 *report, u8 len)
+{
+ struct oz_farewell *f;
+ struct oz_farewell *f2;
+ int found = 0;
+ f = oz_alloc(sizeof(struct oz_farewell) + len - 1, GFP_ATOMIC);
+ if (!f)
+ return;
+ f->ep_num = ep_num;
+ f->index = index;
+ memcpy(f->report, report, len);
+ oz_trace("RX: Adding farewell report\n");
+ spin_lock(&g_polling_lock);
+ list_for_each_entry(f2, &pd->farewell_list, link) {
+ if ((f2->ep_num == ep_num) && (f2->index == index)) {
+ found = 1;
+ list_del(&f2->link);
+ break;
+ }
+ }
+ list_add_tail(&f->link, &pd->farewell_list);
+ spin_unlock(&g_polling_lock);
+ if (found)
+ oz_free(f2);
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq-serialized
+ */
+static void oz_rx_frame(struct sk_buff *skb)
+{
+ u8 *mac_hdr;
+ u8 *src_addr;
+ struct oz_elt *elt;
+ int length;
+ struct oz_pd *pd = 0;
+ struct oz_hdr *oz_hdr = (struct oz_hdr *)skb_network_header(skb);
+ int dup = 0;
+ u32 pkt_num;
+
+ oz_event_log(OZ_EVT_RX_PROCESS, 0,
+ (((u16)oz_hdr->control)<<8)|oz_hdr->last_pkt_num,
+ 0, oz_hdr->pkt_num);
+ oz_trace2(OZ_TRACE_RX_FRAMES,
+ "RX frame PN=0x%x LPN=0x%x control=0x%x\n",
+ oz_hdr->pkt_num, oz_hdr->last_pkt_num, oz_hdr->control);
+ mac_hdr = skb_mac_header(skb);
+ src_addr = &mac_hdr[ETH_ALEN] ;
+ length = skb->len;
+
+ /* Check the version field */
+ if (oz_get_prot_ver(oz_hdr->control) != OZ_PROTOCOL_VERSION) {
+ oz_trace("Incorrect protocol version: %d\n",
+ oz_get_prot_ver(oz_hdr->control));
+ goto done;
+ }
+
+ pkt_num = le32_to_cpu(get_unaligned(&oz_hdr->pkt_num));
+
+ pd = oz_pd_find(src_addr);
+ if (pd) {
+ pd->last_rx_time_j = jiffies;
+ oz_timer_add(pd, OZ_TIMER_TOUT,
+ pd->last_rx_time_j + pd->presleep_j, 1);
+ if (pkt_num != pd->last_rx_pkt_num) {
+ pd->last_rx_pkt_num = pkt_num;
+ } else {
+ dup = 1;
+ oz_trace("Duplicate frame\n");
+ }
+ }
+
+ if (pd && !dup && ((pd->mode & OZ_MODE_MASK) == OZ_MODE_TRIGGERED)) {
+ pd->last_sent_frame = &pd->tx_queue;
+ if (oz_hdr->control & OZ_F_ACK) {
+ /* Retire completed frames */
+ oz_retire_tx_frames(pd, oz_hdr->last_pkt_num);
+ }
+ if ((oz_hdr->control & OZ_F_ACK_REQUESTED) &&
+ (pd->state == OZ_PD_S_CONNECTED)) {
+ int backlog = pd->nb_queued_frames;
+ pd->trigger_pkt_num = pkt_num;
+ /* Send queued frames */
+ while (oz_prepare_frame(pd, 0) >= 0)
+ ;
+ oz_send_queued_frames(pd, backlog);
+ }
+ }
+
+ length -= sizeof(struct oz_hdr);
+ elt = (struct oz_elt *)((u8 *)oz_hdr + sizeof(struct oz_hdr));
+
+ while (length >= sizeof(struct oz_elt)) {
+ length -= sizeof(struct oz_elt) + elt->length;
+ if (length < 0)
+ break;
+ switch (elt->type) {
+ case OZ_ELT_CONNECT_REQ:
+ oz_event_log(OZ_EVT_CONNECT_REQ, 0, 0, 0, 0);
+ oz_trace("RX: OZ_ELT_CONNECT_REQ\n");
+ pd = oz_connect_req(pd, elt, src_addr, skb->dev);
+ break;
+ case OZ_ELT_DISCONNECT:
+ oz_trace("RX: OZ_ELT_DISCONNECT\n");
+ if (pd)
+ oz_pd_sleep(pd);
+ break;
+ case OZ_ELT_UPDATE_PARAM_REQ: {
+ struct oz_elt_update_param *body =
+ (struct oz_elt_update_param *)(elt + 1);
+ oz_trace("RX: OZ_ELT_UPDATE_PARAM_REQ\n");
+ if (pd && (pd->state & OZ_PD_S_CONNECTED)) {
+ spin_lock(&g_polling_lock);
+ pd_set_keepalive(pd, body->keepalive);
+ pd_set_presleep(pd, body->presleep);
+ spin_unlock(&g_polling_lock);
+ }
+ }
+ break;
+ case OZ_ELT_FAREWELL_REQ: {
+ struct oz_elt_farewell *body =
+ (struct oz_elt_farewell *)(elt + 1);
+ oz_trace("RX: OZ_ELT_FAREWELL_REQ\n");
+ oz_add_farewell(pd, body->ep_num,
+ body->index, body->report,
+ elt->length + 1 - sizeof(*body));
+ }
+ break;
+ case OZ_ELT_APP_DATA:
+ if (pd && (pd->state & OZ_PD_S_CONNECTED)) {
+ struct oz_app_hdr *app_hdr =
+ (struct oz_app_hdr *)(elt+1);
+ if (dup)
+ break;
+ oz_handle_app_elt(pd, app_hdr->app_id, elt);
+ }
+ break;
+ default:
+ oz_trace("RX: Unknown elt %02x\n", elt->type);
+ }
+ elt = oz_next_elt(elt);
+ }
+done:
+ if (pd)
+ oz_pd_put(pd);
+ consume_skb(skb);
+}
+/*------------------------------------------------------------------------------
+ * Context: process
+ */
+void oz_protocol_term(void)
+{
+ struct list_head *chain = 0;
+ del_timer_sync(&g_timer);
+ /* Walk the list of bindings and remove each one.
+ */
+ spin_lock_bh(&g_binding_lock);
+ while (g_binding) {
+ struct oz_binding *b = g_binding;
+ g_binding = b->next;
+ spin_unlock_bh(&g_binding_lock);
+ dev_remove_pack(&b->ptype);
+ if (b->ptype.dev)
+ dev_put(b->ptype.dev);
+ oz_free(b);
+ spin_lock_bh(&g_binding_lock);
+ }
+ spin_unlock_bh(&g_binding_lock);
+ /* Walk the list of PDs and stop each one. This causes the PD to be
+ * removed from the list so we can just pull each one from the head
+ * of the list.
+ */
+ spin_lock_bh(&g_polling_lock);
+ while (!list_empty(&g_pd_list)) {
+ struct oz_pd *pd =
+ list_first_entry(&g_pd_list, struct oz_pd, link);
+ oz_pd_get(pd);
+ spin_unlock_bh(&g_polling_lock);
+ oz_pd_stop(pd);
+ oz_pd_put(pd);
+ spin_lock_bh(&g_polling_lock);
+ }
+ chain = g_timer_pool;
+ g_timer_pool = 0;
+ spin_unlock_bh(&g_polling_lock);
+ while (chain) {
+ struct oz_timer *t = container_of(chain, struct oz_timer, link);
+ chain = chain->next;
+ oz_free(t);
+ }
+ oz_trace("Protocol stopped\n");
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq
+ */
+static void oz_pd_handle_timer(struct oz_pd *pd, int type)
+{
+ switch (type) {
+ case OZ_TIMER_TOUT:
+ oz_pd_sleep(pd);
+ break;
+ case OZ_TIMER_STOP:
+ oz_pd_stop(pd);
+ break;
+ case OZ_TIMER_HEARTBEAT: {
+ u16 apps = 0;
+ spin_lock_bh(&g_polling_lock);
+ pd->heartbeat_requested = 0;
+ if (pd->state & OZ_PD_S_CONNECTED)
+ apps = pd->total_apps;
+ spin_unlock_bh(&g_polling_lock);
+ if (apps)
+ oz_pd_heartbeat(pd, apps);
+ }
+ break;
+ }
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq
+ */
+static void oz_protocol_timer(unsigned long arg)
+{
+ struct oz_timer *t;
+ struct oz_timer *t2;
+ struct oz_pd *pd;
+ spin_lock_bh(&g_polling_lock);
+ if (!g_cur_timer) {
+ /* This happens if we remove the current timer but can't stop
+ * the timer from firing. In this case just get out.
+ */
+ oz_event_log(OZ_EVT_TIMER, 0, 0, 0, 0);
+ spin_unlock_bh(&g_polling_lock);
+ return;
+ }
+ g_timer_state = OZ_TIMER_IN_HANDLER;
+ t = g_cur_timer;
+ g_cur_timer = 0;
+ list_del(&t->link);
+ spin_unlock_bh(&g_polling_lock);
+ do {
+ pd = t->pd;
+ oz_event_log(OZ_EVT_TIMER, 0, t->type, 0, 0);
+ oz_pd_handle_timer(pd, t->type);
+ spin_lock_bh(&g_polling_lock);
+ if (g_timer_pool_count < OZ_MAX_TIMER_POOL_SIZE) {
+ t->link.next = g_timer_pool;
+ g_timer_pool = &t->link;
+ g_timer_pool_count++;
+ t = 0;
+ }
+ if (!list_empty(&g_timer_list)) {
+ t2 = container_of(g_timer_list.next,
+ struct oz_timer, link);
+ if (time_before_eq(t2->due_time, jiffies))
+ list_del(&t2->link);
+ else
+ t2 = 0;
+ } else {
+ t2 = 0;
+ }
+ spin_unlock_bh(&g_polling_lock);
+ oz_pd_put(pd);
+ if (t)
+ oz_free(t);
+ t = t2;
+ } while (t);
+ g_timer_state = OZ_TIMER_IDLE;
+ oz_protocol_timer_start();
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq
+ */
+static void oz_protocol_timer_start(void)
+{
+ spin_lock_bh(&g_polling_lock);
+ if (!list_empty(&g_timer_list)) {
+ g_cur_timer =
+ container_of(g_timer_list.next, struct oz_timer, link);
+ if (g_timer_state == OZ_TIMER_SET) {
+ oz_event_log(OZ_EVT_TIMER_CTRL, 3,
+ (u16)g_cur_timer->type, 0,
+ (unsigned)g_cur_timer->due_time);
+ mod_timer(&g_timer, g_cur_timer->due_time);
+ } else {
+ oz_event_log(OZ_EVT_TIMER_CTRL, 4,
+ (u16)g_cur_timer->type, 0,
+ (unsigned)g_cur_timer->due_time);
+ g_timer.expires = g_cur_timer->due_time;
+ g_timer.function = oz_protocol_timer;
+ g_timer.data = 0;
+ add_timer(&g_timer);
+ }
+ g_timer_state = OZ_TIMER_SET;
+ } else {
+ oz_trace("No queued timers\n");
+ }
+ spin_unlock_bh(&g_polling_lock);
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq or process
+ */
+void oz_timer_add(struct oz_pd *pd, int type, unsigned long due_time,
+ int remove)
+{
+ struct list_head *e;
+ struct oz_timer *t = 0;
+ int restart_needed = 0;
+ oz_event_log(OZ_EVT_TIMER_CTRL, 1, (u16)type, 0, (unsigned)due_time);
+ spin_lock(&g_polling_lock);
+ if (remove) {
+ list_for_each(e, &g_timer_list) {
+ t = container_of(e, struct oz_timer, link);
+ if ((t->pd == pd) && (t->type == type)) {
+ if (g_cur_timer == t) {
+ restart_needed = 1;
+ g_cur_timer = 0;
+ }
+ list_del(e);
+ break;
+ }
+ t = 0;
+ }
+ }
+ if (!t) {
+ if (g_timer_pool) {
+ t = container_of(g_timer_pool, struct oz_timer, link);
+ g_timer_pool = g_timer_pool->next;
+ g_timer_pool_count--;
+ } else {
+ t = oz_alloc(sizeof(struct oz_timer), GFP_ATOMIC);
+ }
+ if (t) {
+ t->pd = pd;
+ t->type = type;
+ oz_pd_get(pd);
+ }
+ }
+ if (t) {
+ struct oz_timer *t2;
+ t->due_time = due_time;
+ list_for_each(e, &g_timer_list) {
+ t2 = container_of(e, struct oz_timer, link);
+ if (time_before(due_time, t2->due_time)) {
+ if (t2 == g_cur_timer) {
+ g_cur_timer = 0;
+ restart_needed = 1;
+ }
+ break;
+ }
+ }
+ list_add_tail(&t->link, e);
+ }
+ if (g_timer_state == OZ_TIMER_IDLE)
+ restart_needed = 1;
+ else if (g_timer_state == OZ_TIMER_IN_HANDLER)
+ restart_needed = 0;
+ spin_unlock(&g_polling_lock);
+ if (restart_needed)
+ oz_protocol_timer_start();
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq or process
+ */
+void oz_timer_delete(struct oz_pd *pd, int type)
+{
+ struct list_head *chain = 0;
+ struct oz_timer *t;
+ struct oz_timer *n;
+ int restart_needed = 0;
+ int release = 0;
+ oz_event_log(OZ_EVT_TIMER_CTRL, 2, (u16)type, 0, 0);
+ spin_lock(&g_polling_lock);
+ list_for_each_entry_safe(t, n, &g_timer_list, link) {
+ if ((t->pd == pd) && ((type == 0) || (t->type == type))) {
+ if (g_cur_timer == t) {
+ restart_needed = 1;
+ g_cur_timer = 0;
+ del_timer(&g_timer);
+ }
+ list_del(&t->link);
+ release++;
+ if (g_timer_pool_count < OZ_MAX_TIMER_POOL_SIZE) {
+ t->link.next = g_timer_pool;
+ g_timer_pool = &t->link;
+ g_timer_pool_count++;
+ } else {
+ t->link.next = chain;
+ chain = &t->link;
+ }
+ if (type)
+ break;
+ }
+ }
+ if (g_timer_state == OZ_TIMER_IN_HANDLER)
+ restart_needed = 0;
+ else if (restart_needed)
+ g_timer_state = OZ_TIMER_IDLE;
+ spin_unlock(&g_polling_lock);
+ if (restart_needed)
+ oz_protocol_timer_start();
+ while (release--)
+ oz_pd_put(pd);
+ while (chain) {
+ t = container_of(chain, struct oz_timer, link);
+ chain = chain->next;
+ oz_free(t);
+ }
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq or process
+ */
+void oz_pd_request_heartbeat(struct oz_pd *pd)
+{
+ unsigned long now = jiffies;
+ unsigned long t;
+ spin_lock(&g_polling_lock);
+ if (pd->heartbeat_requested) {
+ spin_unlock(&g_polling_lock);
+ return;
+ }
+ if (pd->pulse_period_j)
+ t = ((now / pd->pulse_period_j) + 1) * pd->pulse_period_j;
+ else
+ t = now + 1;
+ pd->heartbeat_requested = 1;
+ spin_unlock(&g_polling_lock);
+ oz_timer_add(pd, OZ_TIMER_HEARTBEAT, t, 0);
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq or process
+ */
+struct oz_pd *oz_pd_find(u8 *mac_addr)
+{
+ struct oz_pd *pd;
+ struct list_head *e;
+ spin_lock_bh(&g_polling_lock);
+ list_for_each(e, &g_pd_list) {
+ pd = container_of(e, struct oz_pd, link);
+ if (memcmp(pd->mac_addr, mac_addr, ETH_ALEN) == 0) {
+ atomic_inc(&pd->ref_count);
+ spin_unlock_bh(&g_polling_lock);
+ return pd;
+ }
+ }
+ spin_unlock_bh(&g_polling_lock);
+ return 0;
+}
+/*------------------------------------------------------------------------------
+ * Context: process
+ */
+void oz_app_enable(int app_id, int enable)
+{
+ if (app_id <= OZ_APPID_MAX) {
+ spin_lock_bh(&g_polling_lock);
+ if (enable)
+ g_apps |= (1<<app_id);
+ else
+ g_apps &= ~(1<<app_id);
+ spin_unlock_bh(&g_polling_lock);
+ }
+}
+/*------------------------------------------------------------------------------
+ * Context: softirq
+ */
+static int oz_pkt_recv(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *pt, struct net_device *orig_dev)
+{
+ oz_event_log(OZ_EVT_RX_FRAME, 0, 0, 0, 0);
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (skb == 0)
+ return 0;
+ spin_lock_bh(&g_rx_queue.lock);
+ if (g_processing_rx) {
+ /* We already hold the lock so use __ variant.
+ */
+ __skb_queue_head(&g_rx_queue, skb);
+ spin_unlock_bh(&g_rx_queue.lock);
+ } else {
+ g_processing_rx = 1;
+ do {
+
+ spin_unlock_bh(&g_rx_queue.lock);
+ oz_rx_frame(skb);
+ spin_lock_bh(&g_rx_queue.lock);
+ if (skb_queue_empty(&g_rx_queue)) {
+ g_processing_rx = 0;
+ spin_unlock_bh(&g_rx_queue.lock);
+ break;
+ }
+ /* We already hold the lock so use __ variant.
+ */
+ skb = __skb_dequeue(&g_rx_queue);
+ } while (1);
+ }
+ return 0;
+}
+/*------------------------------------------------------------------------------
+ * Context: process
+ */
+void oz_binding_add(char *net_dev)
+{
+ struct oz_binding *binding;
+ binding = oz_alloc(sizeof(struct oz_binding), GFP_ATOMIC);
+ if (binding) {
+ binding->ptype.type = __constant_htons(OZ_ETHERTYPE);
+ binding->ptype.func = oz_pkt_recv;
+ memcpy(binding->name, net_dev, OZ_MAX_BINDING_LEN);
+ if (net_dev && *net_dev) {
+ oz_trace("Adding binding: %s\n", net_dev);
+ binding->ptype.dev =
+ dev_get_by_name(&init_net, net_dev);
+ if (binding->ptype.dev == 0) {
+ oz_trace("Netdev %s not found\n", net_dev);
+ oz_free(binding);
+ binding = 0;
+ }
+ } else {
+ oz_trace("Binding to all netcards\n");
+ binding->ptype.dev = 0;
+ }
+ if (binding) {
+ dev_add_pack(&binding->ptype);
+ spin_lock_bh(&g_binding_lock);
+ binding->next = g_binding;
+ g_binding = binding;
+ spin_unlock_bh(&g_binding_lock);
+ }
+ }
+}
+/*------------------------------------------------------------------------------
+ * Context: process
+ */
+static int compare_binding_name(char *s1, char *s2)
+{
+ int i;
+ for (i = 0; i < OZ_MAX_BINDING_LEN; i++) {
+ if (*s1 != *s2)
+ return 0;
+ if (!*s1++)
+ return 1;
+ s2++;
+ }
+ return 1;
+}
+/*------------------------------------------------------------------------------
+ * Context: process
+ */
+static void pd_stop_all_for_device(struct net_device *net_dev)
+{
+ struct list_head h;
+ struct oz_pd *pd;
+ struct oz_pd *n;
+ INIT_LIST_HEAD(&h);
+ spin_lock_bh(&g_polling_lock);
+ list_for_each_entry_safe(pd, n, &g_pd_list, link) {
+ if (pd->net_dev == net_dev) {
+ list_move(&pd->link, &h);
+ oz_pd_get(pd);
+ }
+ }
+ spin_unlock_bh(&g_polling_lock);
+ while (!list_empty(&h)) {
+ pd = list_first_entry(&h, struct oz_pd, link);
+ oz_pd_stop(pd);
+ oz_pd_put(pd);
+ }
+}
+/*------------------------------------------------------------------------------
+ * Context: process
+ */
+void oz_binding_remove(char *net_dev)
+{
+ struct oz_binding *binding = 0;
+ struct oz_binding **link;
+ oz_trace("Removing binding: %s\n", net_dev);
+ spin_lock_bh(&g_binding_lock);
+ binding = g_binding;
+ link = &g_binding;
+ while (binding) {
+ if (compare_binding_name(binding->name, net_dev)) {
+ oz_trace("Binding '%s' found\n", net_dev);
+ *link = binding->next;
+ break;
+ } else {
+ link = &binding;
+ binding = binding->next;
+ }
+ }
+ spin_unlock_bh(&g_binding_lock);
+ if (binding) {
+ dev_remove_pack(&binding->ptype);
+ if (binding->ptype.dev) {
+ dev_put(binding->ptype.dev);
+ pd_stop_all_for_device(binding->ptype.dev);
+ }
+ oz_free(binding);
+ }
+}
+/*------------------------------------------------------------------------------
+ * Context: process
+ */
+static char *oz_get_next_device_name(char *s, char *dname, int max_size)
+{
+ while (*s == ',')
+ s++;
+ while (*s && (*s != ',') && max_size > 1) {
+ *dname++ = *s++;
+ max_size--;
+ }
+ *dname = 0;
+ return s;
+}
+/*------------------------------------------------------------------------------
+ * Context: process
+ */
+int oz_protocol_init(char *devs)
+{
+ skb_queue_head_init(&g_rx_queue);
+ if (devs && (devs[0] == '*')) {
+ oz_binding_add(0);
+ } else {
+ char d[32];
+ while (*devs) {
+ devs = oz_get_next_device_name(devs, d, sizeof(d));
+ if (d[0])
+ oz_binding_add(d);
+ }
+ }
+ init_timer(&g_timer);
+ return 0;
+}
+/*------------------------------------------------------------------------------
+ * Context: process
+ */
+int oz_get_pd_list(struct oz_mac_addr *addr, int max_count)
+{
+ struct oz_pd *pd;
+ struct list_head *e;
+ int count = 0;
+ spin_lock_bh(&g_polling_lock);
+ list_for_each(e, &g_pd_list) {
+ if (count >= max_count)
+ break;
+ pd = container_of(e, struct oz_pd, link);
+ memcpy(&addr[count++], pd->mac_addr, ETH_ALEN);
+ }
+ spin_unlock_bh(&g_polling_lock);
+ return count;
+}
+/*------------------------------------------------------------------------------
+*/
+void oz_polling_lock_bh(void)
+{
+ spin_lock_bh(&g_polling_lock);
+}
+/*------------------------------------------------------------------------------
+*/
+void oz_polling_unlock_bh(void)
+{
+ spin_unlock_bh(&g_polling_lock);
+}
--- /dev/null
+/* -----------------------------------------------------------------------------
+ * Copyright (c) 2011 Ozmo Inc
+ * Released under the GNU General Public License Version 2 (GPLv2).
+ * -----------------------------------------------------------------------------
+ */
+#ifndef _OZPROTOCOL_H
+#define _OZPROTOCOL_H
+
+#define PACKED __packed
+
+#define OZ_ETHERTYPE 0x892e
+
+/* Status codes
+ */
+#define OZ_STATUS_SUCCESS 0
+#define OZ_STATUS_INVALID_PARAM 1
+#define OZ_STATUS_TOO_MANY_PDS 2
+#define OZ_STATUS_NOT_ALLOWED 4
+#define OZ_STATUS_SESSION_MISMATCH 5
+#define OZ_STATUS_SESSION_TEARDOWN 6
+
+/* This is the generic element header.
+ Every element starts with this.
+ */
+struct oz_elt {
+ u8 type;
+ u8 length;
+} PACKED;
+
+#define oz_next_elt(__elt) \
+ (struct oz_elt *)((u8 *)((__elt) + 1) + (__elt)->length)
+
+/* Protocol element IDs.
+ */
+#define OZ_ELT_CONNECT_REQ 0x06
+#define OZ_ELT_CONNECT_RSP 0x07
+#define OZ_ELT_DISCONNECT 0x08
+#define OZ_ELT_UPDATE_PARAM_REQ 0x11
+#define OZ_ELT_FAREWELL_REQ 0x12
+#define OZ_ELT_APP_DATA 0x31
+
+/* This is the Ozmo header which is the first Ozmo specific part
+ * of a frame and comes after the MAC header.
+ */
+struct oz_hdr {
+ u8 control;
+ u8 last_pkt_num;
+ u32 pkt_num;
+} PACKED;
+
+#define OZ_PROTOCOL_VERSION 0x1
+/* Bits in the control field. */
+#define OZ_VERSION_MASK 0xc
+#define OZ_VERSION_SHIFT 2
+#define OZ_F_ACK 0x10
+#define OZ_F_ISOC 0x20
+#define OZ_F_MORE_DATA 0x40
+#define OZ_F_ACK_REQUESTED 0x80
+
+#define oz_get_prot_ver(__x) (((__x) & OZ_VERSION_MASK) >> OZ_VERSION_SHIFT)
+
+/* Used to select the bits of packet number to put in the last_pkt_num.
+ */
+#define OZ_LAST_PN_MASK 0x00ff
+
+#define OZ_LAST_PN_HALF_CYCLE 127
+
+/* Connect request data structure.
+ */
+struct oz_elt_connect_req {
+ u8 mode;
+ u8 resv1[16];
+ u8 pd_info;
+ u8 session_id;
+ u8 presleep;
+ u8 resv2;
+ u8 host_vendor;
+ u8 keep_alive;
+ u16 apps;
+ u8 max_len_div16;
+ u8 ms_per_isoc;
+ u8 resv3[2];
+} PACKED;
+
+/* mode field bits.
+ */
+#define OZ_MODE_POLLED 0x0
+#define OZ_MODE_TRIGGERED 0x1
+#define OZ_MODE_MASK 0xf
+#define OZ_F_ISOC_NO_ELTS 0x40
+#define OZ_F_ISOC_ANYTIME 0x80
+
+/* Keep alive field.
+ */
+#define OZ_KALIVE_TYPE_MASK 0xc0
+#define OZ_KALIVE_VALUE_MASK 0x3f
+#define OZ_KALIVE_SPECIAL 0x00
+#define OZ_KALIVE_SECS 0x40
+#define OZ_KALIVE_MINS 0x80
+#define OZ_KALIVE_HOURS 0xc0
+
+/* Connect response data structure.
+ */
+struct oz_elt_connect_rsp {
+ u8 mode;
+ u8 status;
+ u8 resv1[3];
+ u8 session_id;
+ u16 apps;
+ u32 resv2;
+} PACKED;
+
+struct oz_elt_farewell {
+ u8 ep_num;
+ u8 index;
+ u8 report[1];
+} PACKED;
+
+struct oz_elt_update_param {
+ u8 resv1[16];
+ u8 presleep;
+ u8 resv2;
+ u8 host_vendor;
+ u8 keepalive;
+} PACKED;
+
+/* Header common to all application elements.
+ */
+struct oz_app_hdr {
+ u8 app_id;
+ u8 elt_seq_num;
+} PACKED;
+
+/* Values for app_id.
+ */
+#define OZ_APPID_USB 0x1
+#define OZ_APPID_UNUSED1 0x2
+#define OZ_APPID_UNUSED2 0x3
+#define OZ_APPID_SERIAL 0x4
+#define OZ_APPID_MAX OZ_APPID_SERIAL
+#define OZ_NB_APPS (OZ_APPID_MAX+1)
+
+/* USB header common to all elements for the USB application.
+ * This header extends the oz_app_hdr and comes directly after
+ * the element header in a USB application.
+ */
+struct oz_usb_hdr {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+} PACKED;
+
+
+
+/* USB requests element subtypes (type field of hs_usb_hdr).
+ */
+#define OZ_GET_DESC_REQ 1
+#define OZ_GET_DESC_RSP 2
+#define OZ_SET_CONFIG_REQ 3
+#define OZ_SET_CONFIG_RSP 4
+#define OZ_SET_INTERFACE_REQ 5
+#define OZ_SET_INTERFACE_RSP 6
+#define OZ_VENDOR_CLASS_REQ 7
+#define OZ_VENDOR_CLASS_RSP 8
+#define OZ_GET_STATUS_REQ 9
+#define OZ_GET_STATUS_RSP 10
+#define OZ_CLEAR_FEATURE_REQ 11
+#define OZ_CLEAR_FEATURE_RSP 12
+#define OZ_SET_FEATURE_REQ 13
+#define OZ_SET_FEATURE_RSP 14
+#define OZ_GET_CONFIGURATION_REQ 15
+#define OZ_GET_CONFIGURATION_RSP 16
+#define OZ_GET_INTERFACE_REQ 17
+#define OZ_GET_INTERFACE_RSP 18
+#define OZ_SYNCH_FRAME_REQ 19
+#define OZ_SYNCH_FRAME_RSP 20
+#define OZ_USB_ENDPOINT_DATA 23
+
+#define OZ_REQD_D2H 0x80
+
+struct oz_get_desc_req {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 req_id;
+ u16 offset;
+ u16 size;
+ u8 req_type;
+ u8 desc_type;
+ u16 w_index;
+ u8 index;
+} PACKED;
+
+/* Values for desc_type field.
+*/
+#define OZ_DESC_DEVICE 0x01
+#define OZ_DESC_CONFIG 0x02
+#define OZ_DESC_STRING 0x03
+
+/* Values for req_type field.
+ */
+#define OZ_RECP_MASK 0x1F
+#define OZ_RECP_DEVICE 0x00
+#define OZ_RECP_INTERFACE 0x01
+#define OZ_RECP_ENDPOINT 0x02
+
+#define OZ_REQT_MASK 0x60
+#define OZ_REQT_STD 0x00
+#define OZ_REQT_CLASS 0x20
+#define OZ_REQT_VENDOR 0x40
+
+struct oz_get_desc_rsp {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 req_id;
+ u16 offset;
+ u16 total_size;
+ u8 rcode;
+ u8 data[1];
+} PACKED;
+
+struct oz_feature_req {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 req_id;
+ u8 recipient;
+ u8 index;
+ u16 feature;
+} PACKED;
+
+struct oz_feature_rsp {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 req_id;
+ u8 rcode;
+} PACKED;
+
+struct oz_set_config_req {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 req_id;
+ u8 index;
+} PACKED;
+
+struct oz_set_config_rsp {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 req_id;
+ u8 rcode;
+} PACKED;
+
+struct oz_set_interface_req {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 req_id;
+ u8 index;
+ u8 alternative;
+} PACKED;
+
+struct oz_set_interface_rsp {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 req_id;
+ u8 rcode;
+} PACKED;
+
+struct oz_get_interface_req {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 req_id;
+ u8 index;
+} PACKED;
+
+struct oz_get_interface_rsp {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 req_id;
+ u8 rcode;
+ u8 alternative;
+} PACKED;
+
+struct oz_vendor_class_req {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 req_id;
+ u8 req_type;
+ u8 request;
+ u16 value;
+ u16 index;
+ u8 data[1];
+} PACKED;
+
+struct oz_vendor_class_rsp {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 req_id;
+ u8 rcode;
+ u8 data[1];
+} PACKED;
+
+struct oz_data {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 endpoint;
+ u8 format;
+} PACKED;
+
+struct oz_isoc_fixed {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 endpoint;
+ u8 format;
+ u8 unit_size;
+ u8 frame_number;
+ u8 data[1];
+} PACKED;
+
+struct oz_multiple_fixed {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 endpoint;
+ u8 format;
+ u8 unit_size;
+ u8 data[1];
+} PACKED;
+
+struct oz_fragmented {
+ u8 app_id;
+ u8 elt_seq_num;
+ u8 type;
+ u8 endpoint;
+ u8 format;
+ u16 total_size;
+ u16 offset;
+ u8 data[1];
+} PACKED;
+
+/* Note: the following does not get packaged in an element in the same way
+ * that other data formats are packaged. Instead the data is put in a frame
+ * directly after the oz_header and is the only permitted data in such a
+ * frame. The length of the data is directly determined from the frame size.
+ */
+struct oz_isoc_large {
+ u8 endpoint;
+ u8 format;
+ u8 ms_data;
+ u8 frame_number;
+} PACKED;
+
+#define OZ_DATA_F_TYPE_MASK 0xF
+#define OZ_DATA_F_MULTIPLE_FIXED 0x1
+#define OZ_DATA_F_MULTIPLE_VAR 0x2
+#define OZ_DATA_F_ISOC_FIXED 0x3
+#define OZ_DATA_F_ISOC_VAR 0x4
+#define OZ_DATA_F_FRAGMENTED 0x5
+#define OZ_DATA_F_ISOC_LARGE 0x7
+
+#endif /* _OZPROTOCOL_H */
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff