Chris Kelly | 1619cb6 | 2012-02-20 21:11:28 +0000 | [diff] [blame] | 1 | /* ----------------------------------------------------------------------------- |
| 2 | * Copyright (c) 2011 Ozmo Inc |
| 3 | * Released under the GNU General Public License Version 2 (GPLv2). |
| 4 | * ----------------------------------------------------------------------------- |
| 5 | */ |
| 6 | #include <linux/init.h> |
| 7 | #include <linux/module.h> |
| 8 | #include <linux/timer.h> |
| 9 | #include <linux/sched.h> |
| 10 | #include <linux/netdevice.h> |
| 11 | #include <linux/errno.h> |
| 12 | #include <linux/ieee80211.h> |
| 13 | #include "ozconfig.h" |
| 14 | #include "ozprotocol.h" |
| 15 | #include "ozeltbuf.h" |
| 16 | #include "ozpd.h" |
| 17 | #include "ozproto.h" |
| 18 | #include "ozusbsvc.h" |
| 19 | #include "oztrace.h" |
| 20 | #include "ozappif.h" |
| 21 | #include "ozevent.h" |
Chris Kelly | 1619cb6 | 2012-02-20 21:11:28 +0000 | [diff] [blame] | 22 | #include <asm/unaligned.h> |
| 23 | #include <linux/uaccess.h> |
| 24 | #include <net/psnap.h> |
| 25 | /*------------------------------------------------------------------------------ |
| 26 | */ |
| 27 | #define OZ_CF_CONN_SUCCESS 1 |
| 28 | #define OZ_CF_CONN_FAILURE 2 |
| 29 | |
| 30 | #define OZ_DO_STOP 1 |
| 31 | #define OZ_DO_SLEEP 2 |
| 32 | |
| 33 | /* States of the timer. |
| 34 | */ |
| 35 | #define OZ_TIMER_IDLE 0 |
| 36 | #define OZ_TIMER_SET 1 |
| 37 | #define OZ_TIMER_IN_HANDLER 2 |
| 38 | |
| 39 | #define OZ_MAX_TIMER_POOL_SIZE 16 |
| 40 | |
| 41 | /*------------------------------------------------------------------------------ |
| 42 | */ |
| 43 | struct oz_binding { |
| 44 | struct packet_type ptype; |
| 45 | char name[OZ_MAX_BINDING_LEN]; |
| 46 | struct oz_binding *next; |
| 47 | }; |
| 48 | |
| 49 | struct oz_timer { |
| 50 | struct list_head link; |
| 51 | struct oz_pd *pd; |
| 52 | unsigned long due_time; |
| 53 | int type; |
| 54 | }; |
| 55 | /*------------------------------------------------------------------------------ |
| 56 | * Static external variables. |
| 57 | */ |
| 58 | static DEFINE_SPINLOCK(g_polling_lock); |
| 59 | static LIST_HEAD(g_pd_list); |
| 60 | static struct oz_binding *g_binding ; |
| 61 | static DEFINE_SPINLOCK(g_binding_lock); |
| 62 | static struct sk_buff_head g_rx_queue; |
| 63 | static u8 g_session_id; |
| 64 | static u16 g_apps = 0x1; |
| 65 | static int g_processing_rx; |
| 66 | static struct timer_list g_timer; |
| 67 | static struct oz_timer *g_cur_timer; |
| 68 | static struct list_head *g_timer_pool; |
| 69 | static int g_timer_pool_count; |
| 70 | static int g_timer_state = OZ_TIMER_IDLE; |
| 71 | static LIST_HEAD(g_timer_list); |
| 72 | /*------------------------------------------------------------------------------ |
| 73 | */ |
| 74 | static void oz_protocol_timer_start(void); |
| 75 | /*------------------------------------------------------------------------------ |
| 76 | * Context: softirq-serialized |
| 77 | */ |
| 78 | static u8 oz_get_new_session_id(u8 exclude) |
| 79 | { |
| 80 | if (++g_session_id == 0) |
| 81 | g_session_id = 1; |
| 82 | if (g_session_id == exclude) { |
| 83 | if (++g_session_id == 0) |
| 84 | g_session_id = 1; |
| 85 | } |
| 86 | return g_session_id; |
| 87 | } |
| 88 | /*------------------------------------------------------------------------------ |
| 89 | * Context: softirq-serialized |
| 90 | */ |
| 91 | static void oz_send_conn_rsp(struct oz_pd *pd, u8 status) |
| 92 | { |
| 93 | struct sk_buff *skb; |
| 94 | struct net_device *dev = pd->net_dev; |
| 95 | struct oz_hdr *oz_hdr; |
| 96 | struct oz_elt *elt; |
| 97 | struct oz_elt_connect_rsp *body; |
| 98 | int sz = sizeof(struct oz_hdr) + sizeof(struct oz_elt) + |
| 99 | sizeof(struct oz_elt_connect_rsp); |
| 100 | skb = alloc_skb(sz + OZ_ALLOCATED_SPACE(dev), GFP_ATOMIC); |
| 101 | if (skb == 0) |
| 102 | return; |
| 103 | skb_reserve(skb, LL_RESERVED_SPACE(dev)); |
| 104 | skb_reset_network_header(skb); |
| 105 | oz_hdr = (struct oz_hdr *)skb_put(skb, sz); |
| 106 | elt = (struct oz_elt *)(oz_hdr+1); |
| 107 | body = (struct oz_elt_connect_rsp *)(elt+1); |
| 108 | skb->dev = dev; |
| 109 | skb->protocol = htons(OZ_ETHERTYPE); |
| 110 | /* Fill in device header */ |
| 111 | if (dev_hard_header(skb, dev, OZ_ETHERTYPE, pd->mac_addr, |
| 112 | dev->dev_addr, skb->len) < 0) { |
| 113 | kfree_skb(skb); |
| 114 | return; |
| 115 | } |
| 116 | oz_hdr->control = (OZ_PROTOCOL_VERSION<<OZ_VERSION_SHIFT); |
| 117 | oz_hdr->last_pkt_num = 0; |
| 118 | put_unaligned(0, &oz_hdr->pkt_num); |
| 119 | oz_event_log(OZ_EVT_CONNECT_RSP, 0, 0, 0, 0); |
| 120 | elt->type = OZ_ELT_CONNECT_RSP; |
| 121 | elt->length = sizeof(struct oz_elt_connect_rsp); |
| 122 | memset(body, 0, sizeof(struct oz_elt_connect_rsp)); |
| 123 | body->status = status; |
| 124 | if (status == 0) { |
| 125 | body->mode = pd->mode; |
| 126 | body->session_id = pd->session_id; |
| 127 | put_unaligned(cpu_to_le16(pd->total_apps), &body->apps); |
| 128 | } |
| 129 | oz_trace("TX: OZ_ELT_CONNECT_RSP %d", status); |
| 130 | dev_queue_xmit(skb); |
| 131 | return; |
| 132 | } |
| 133 | /*------------------------------------------------------------------------------ |
| 134 | * Context: softirq-serialized |
| 135 | */ |
| 136 | static void pd_set_keepalive(struct oz_pd *pd, u8 kalive) |
| 137 | { |
| 138 | unsigned long keep_alive = kalive & OZ_KALIVE_VALUE_MASK; |
| 139 | |
| 140 | switch (kalive & OZ_KALIVE_TYPE_MASK) { |
| 141 | case OZ_KALIVE_SPECIAL: |
| 142 | pd->keep_alive_j = |
| 143 | oz_ms_to_jiffies(keep_alive * 1000*60*60*24*20); |
| 144 | break; |
| 145 | case OZ_KALIVE_SECS: |
| 146 | pd->keep_alive_j = oz_ms_to_jiffies(keep_alive*1000); |
| 147 | break; |
| 148 | case OZ_KALIVE_MINS: |
| 149 | pd->keep_alive_j = oz_ms_to_jiffies(keep_alive*1000*60); |
| 150 | break; |
| 151 | case OZ_KALIVE_HOURS: |
| 152 | pd->keep_alive_j = oz_ms_to_jiffies(keep_alive*1000*60*60); |
| 153 | break; |
| 154 | default: |
| 155 | pd->keep_alive_j = 0; |
| 156 | } |
| 157 | oz_trace("Keepalive = %lu jiffies\n", pd->keep_alive_j); |
| 158 | } |
| 159 | /*------------------------------------------------------------------------------ |
| 160 | * Context: softirq-serialized |
| 161 | */ |
| 162 | static void pd_set_presleep(struct oz_pd *pd, u8 presleep) |
| 163 | { |
| 164 | if (presleep) |
| 165 | pd->presleep_j = oz_ms_to_jiffies(presleep*100); |
| 166 | else |
| 167 | pd->presleep_j = OZ_PRESLEEP_TOUT_J; |
| 168 | oz_trace("Presleep time = %lu jiffies\n", pd->presleep_j); |
| 169 | } |
| 170 | /*------------------------------------------------------------------------------ |
| 171 | * Context: softirq-serialized |
| 172 | */ |
| 173 | static struct oz_pd *oz_connect_req(struct oz_pd *cur_pd, struct oz_elt *elt, |
| 174 | u8 *pd_addr, struct net_device *net_dev) |
| 175 | { |
| 176 | struct oz_pd *pd; |
| 177 | struct oz_elt_connect_req *body = |
| 178 | (struct oz_elt_connect_req *)(elt+1); |
| 179 | u8 rsp_status = OZ_STATUS_SUCCESS; |
| 180 | u8 stop_needed = 0; |
| 181 | u16 new_apps = g_apps; |
| 182 | struct net_device *old_net_dev = 0; |
| 183 | struct oz_pd *free_pd = 0; |
| 184 | if (cur_pd) { |
| 185 | pd = cur_pd; |
| 186 | spin_lock_bh(&g_polling_lock); |
| 187 | } else { |
| 188 | struct oz_pd *pd2 = 0; |
| 189 | struct list_head *e; |
| 190 | pd = oz_pd_alloc(pd_addr); |
| 191 | if (pd == 0) |
| 192 | return 0; |
| 193 | pd->last_rx_time_j = jiffies; |
| 194 | spin_lock_bh(&g_polling_lock); |
| 195 | list_for_each(e, &g_pd_list) { |
| 196 | pd2 = container_of(e, struct oz_pd, link); |
| 197 | if (memcmp(pd2->mac_addr, pd_addr, ETH_ALEN) == 0) { |
| 198 | free_pd = pd; |
| 199 | pd = pd2; |
| 200 | break; |
| 201 | } |
| 202 | } |
| 203 | if (pd != pd2) |
| 204 | list_add_tail(&pd->link, &g_pd_list); |
| 205 | } |
| 206 | if (pd == 0) { |
| 207 | spin_unlock_bh(&g_polling_lock); |
| 208 | return 0; |
| 209 | } |
| 210 | if (pd->net_dev != net_dev) { |
| 211 | old_net_dev = pd->net_dev; |
| 212 | dev_hold(net_dev); |
| 213 | pd->net_dev = net_dev; |
| 214 | } |
| 215 | oz_trace("Host vendor: %d\n", body->host_vendor); |
| 216 | pd->max_tx_size = OZ_MAX_TX_SIZE; |
| 217 | pd->mode = body->mode; |
| 218 | pd->pd_info = body->pd_info; |
| 219 | if (pd->mode & OZ_F_ISOC_NO_ELTS) { |
| 220 | pd->mode |= OZ_F_ISOC_ANYTIME; |
| 221 | pd->ms_per_isoc = body->ms_per_isoc; |
| 222 | if (!pd->ms_per_isoc) |
| 223 | pd->ms_per_isoc = 4; |
| 224 | } |
| 225 | if (body->max_len_div16) |
| 226 | pd->max_tx_size = ((u16)body->max_len_div16)<<4; |
| 227 | oz_trace("Max frame:%u Ms per isoc:%u\n", |
| 228 | pd->max_tx_size, pd->ms_per_isoc); |
| 229 | pd->max_stream_buffering = 3*1024; |
| 230 | pd->timeout_time_j = jiffies + OZ_CONNECTION_TOUT_J; |
| 231 | pd->pulse_period_j = OZ_QUANTUM_J; |
| 232 | pd_set_presleep(pd, body->presleep); |
| 233 | pd_set_keepalive(pd, body->keep_alive); |
| 234 | |
| 235 | new_apps &= le16_to_cpu(get_unaligned(&body->apps)); |
| 236 | if ((new_apps & 0x1) && (body->session_id)) { |
| 237 | if (pd->session_id) { |
| 238 | if (pd->session_id != body->session_id) { |
| 239 | rsp_status = OZ_STATUS_SESSION_MISMATCH; |
| 240 | goto done; |
| 241 | } |
| 242 | } else { |
| 243 | new_apps &= ~0x1; /* Resume not permitted */ |
| 244 | pd->session_id = |
| 245 | oz_get_new_session_id(body->session_id); |
| 246 | } |
| 247 | } else { |
| 248 | if (pd->session_id && !body->session_id) { |
| 249 | rsp_status = OZ_STATUS_SESSION_TEARDOWN; |
| 250 | stop_needed = 1; |
| 251 | } else { |
| 252 | new_apps &= ~0x1; /* Resume not permitted */ |
| 253 | pd->session_id = |
| 254 | oz_get_new_session_id(body->session_id); |
| 255 | } |
| 256 | } |
| 257 | done: |
| 258 | if (rsp_status == OZ_STATUS_SUCCESS) { |
| 259 | u16 start_apps = new_apps & ~pd->total_apps & ~0x1; |
| 260 | u16 stop_apps = pd->total_apps & ~new_apps & ~0x1; |
| 261 | u16 resume_apps = new_apps & pd->paused_apps & ~0x1; |
| 262 | spin_unlock_bh(&g_polling_lock); |
| 263 | oz_pd_set_state(pd, OZ_PD_S_CONNECTED); |
| 264 | oz_timer_delete(pd, OZ_TIMER_STOP); |
| 265 | oz_trace("new_apps=0x%x total_apps=0x%x paused_apps=0x%x\n", |
| 266 | new_apps, pd->total_apps, pd->paused_apps); |
| 267 | if (start_apps) { |
| 268 | if (oz_services_start(pd, start_apps, 0)) |
| 269 | rsp_status = OZ_STATUS_TOO_MANY_PDS; |
| 270 | } |
| 271 | if (resume_apps) |
| 272 | if (oz_services_start(pd, resume_apps, 1)) |
| 273 | rsp_status = OZ_STATUS_TOO_MANY_PDS; |
| 274 | if (stop_apps) |
| 275 | oz_services_stop(pd, stop_apps, 0); |
| 276 | oz_pd_request_heartbeat(pd); |
| 277 | } else { |
| 278 | spin_unlock_bh(&g_polling_lock); |
| 279 | } |
| 280 | oz_send_conn_rsp(pd, rsp_status); |
| 281 | if (rsp_status != OZ_STATUS_SUCCESS) { |
| 282 | if (stop_needed) |
| 283 | oz_pd_stop(pd); |
| 284 | oz_pd_put(pd); |
| 285 | pd = 0; |
| 286 | } |
| 287 | if (old_net_dev) |
| 288 | dev_put(old_net_dev); |
| 289 | if (free_pd) |
| 290 | oz_pd_destroy(free_pd); |
| 291 | return pd; |
| 292 | } |
| 293 | /*------------------------------------------------------------------------------ |
| 294 | * Context: softirq-serialized |
| 295 | */ |
| 296 | static void oz_add_farewell(struct oz_pd *pd, u8 ep_num, u8 index, |
| 297 | u8 *report, u8 len) |
| 298 | { |
| 299 | struct oz_farewell *f; |
| 300 | struct oz_farewell *f2; |
| 301 | int found = 0; |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame^] | 302 | f = kmalloc(sizeof(struct oz_farewell) + len - 1, GFP_ATOMIC); |
Chris Kelly | 1619cb6 | 2012-02-20 21:11:28 +0000 | [diff] [blame] | 303 | if (!f) |
| 304 | return; |
| 305 | f->ep_num = ep_num; |
| 306 | f->index = index; |
| 307 | memcpy(f->report, report, len); |
| 308 | oz_trace("RX: Adding farewell report\n"); |
| 309 | spin_lock(&g_polling_lock); |
| 310 | list_for_each_entry(f2, &pd->farewell_list, link) { |
| 311 | if ((f2->ep_num == ep_num) && (f2->index == index)) { |
| 312 | found = 1; |
| 313 | list_del(&f2->link); |
| 314 | break; |
| 315 | } |
| 316 | } |
| 317 | list_add_tail(&f->link, &pd->farewell_list); |
| 318 | spin_unlock(&g_polling_lock); |
| 319 | if (found) |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame^] | 320 | kfree(f2); |
Chris Kelly | 1619cb6 | 2012-02-20 21:11:28 +0000 | [diff] [blame] | 321 | } |
| 322 | /*------------------------------------------------------------------------------ |
| 323 | * Context: softirq-serialized |
| 324 | */ |
| 325 | static void oz_rx_frame(struct sk_buff *skb) |
| 326 | { |
| 327 | u8 *mac_hdr; |
| 328 | u8 *src_addr; |
| 329 | struct oz_elt *elt; |
| 330 | int length; |
| 331 | struct oz_pd *pd = 0; |
| 332 | struct oz_hdr *oz_hdr = (struct oz_hdr *)skb_network_header(skb); |
| 333 | int dup = 0; |
| 334 | u32 pkt_num; |
| 335 | |
| 336 | oz_event_log(OZ_EVT_RX_PROCESS, 0, |
| 337 | (((u16)oz_hdr->control)<<8)|oz_hdr->last_pkt_num, |
| 338 | 0, oz_hdr->pkt_num); |
| 339 | oz_trace2(OZ_TRACE_RX_FRAMES, |
| 340 | "RX frame PN=0x%x LPN=0x%x control=0x%x\n", |
| 341 | oz_hdr->pkt_num, oz_hdr->last_pkt_num, oz_hdr->control); |
| 342 | mac_hdr = skb_mac_header(skb); |
| 343 | src_addr = &mac_hdr[ETH_ALEN] ; |
| 344 | length = skb->len; |
| 345 | |
| 346 | /* Check the version field */ |
| 347 | if (oz_get_prot_ver(oz_hdr->control) != OZ_PROTOCOL_VERSION) { |
| 348 | oz_trace("Incorrect protocol version: %d\n", |
| 349 | oz_get_prot_ver(oz_hdr->control)); |
| 350 | goto done; |
| 351 | } |
| 352 | |
| 353 | pkt_num = le32_to_cpu(get_unaligned(&oz_hdr->pkt_num)); |
| 354 | |
| 355 | pd = oz_pd_find(src_addr); |
| 356 | if (pd) { |
| 357 | pd->last_rx_time_j = jiffies; |
| 358 | oz_timer_add(pd, OZ_TIMER_TOUT, |
| 359 | pd->last_rx_time_j + pd->presleep_j, 1); |
| 360 | if (pkt_num != pd->last_rx_pkt_num) { |
| 361 | pd->last_rx_pkt_num = pkt_num; |
| 362 | } else { |
| 363 | dup = 1; |
| 364 | oz_trace("Duplicate frame\n"); |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | if (pd && !dup && ((pd->mode & OZ_MODE_MASK) == OZ_MODE_TRIGGERED)) { |
| 369 | pd->last_sent_frame = &pd->tx_queue; |
| 370 | if (oz_hdr->control & OZ_F_ACK) { |
| 371 | /* Retire completed frames */ |
| 372 | oz_retire_tx_frames(pd, oz_hdr->last_pkt_num); |
| 373 | } |
| 374 | if ((oz_hdr->control & OZ_F_ACK_REQUESTED) && |
| 375 | (pd->state == OZ_PD_S_CONNECTED)) { |
| 376 | int backlog = pd->nb_queued_frames; |
| 377 | pd->trigger_pkt_num = pkt_num; |
| 378 | /* Send queued frames */ |
| 379 | while (oz_prepare_frame(pd, 0) >= 0) |
| 380 | ; |
| 381 | oz_send_queued_frames(pd, backlog); |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | length -= sizeof(struct oz_hdr); |
| 386 | elt = (struct oz_elt *)((u8 *)oz_hdr + sizeof(struct oz_hdr)); |
| 387 | |
| 388 | while (length >= sizeof(struct oz_elt)) { |
| 389 | length -= sizeof(struct oz_elt) + elt->length; |
| 390 | if (length < 0) |
| 391 | break; |
| 392 | switch (elt->type) { |
| 393 | case OZ_ELT_CONNECT_REQ: |
| 394 | oz_event_log(OZ_EVT_CONNECT_REQ, 0, 0, 0, 0); |
| 395 | oz_trace("RX: OZ_ELT_CONNECT_REQ\n"); |
| 396 | pd = oz_connect_req(pd, elt, src_addr, skb->dev); |
| 397 | break; |
| 398 | case OZ_ELT_DISCONNECT: |
| 399 | oz_trace("RX: OZ_ELT_DISCONNECT\n"); |
| 400 | if (pd) |
| 401 | oz_pd_sleep(pd); |
| 402 | break; |
| 403 | case OZ_ELT_UPDATE_PARAM_REQ: { |
| 404 | struct oz_elt_update_param *body = |
| 405 | (struct oz_elt_update_param *)(elt + 1); |
| 406 | oz_trace("RX: OZ_ELT_UPDATE_PARAM_REQ\n"); |
| 407 | if (pd && (pd->state & OZ_PD_S_CONNECTED)) { |
| 408 | spin_lock(&g_polling_lock); |
| 409 | pd_set_keepalive(pd, body->keepalive); |
| 410 | pd_set_presleep(pd, body->presleep); |
| 411 | spin_unlock(&g_polling_lock); |
| 412 | } |
| 413 | } |
| 414 | break; |
| 415 | case OZ_ELT_FAREWELL_REQ: { |
| 416 | struct oz_elt_farewell *body = |
| 417 | (struct oz_elt_farewell *)(elt + 1); |
| 418 | oz_trace("RX: OZ_ELT_FAREWELL_REQ\n"); |
| 419 | oz_add_farewell(pd, body->ep_num, |
| 420 | body->index, body->report, |
| 421 | elt->length + 1 - sizeof(*body)); |
| 422 | } |
| 423 | break; |
| 424 | case OZ_ELT_APP_DATA: |
| 425 | if (pd && (pd->state & OZ_PD_S_CONNECTED)) { |
| 426 | struct oz_app_hdr *app_hdr = |
| 427 | (struct oz_app_hdr *)(elt+1); |
| 428 | if (dup) |
| 429 | break; |
| 430 | oz_handle_app_elt(pd, app_hdr->app_id, elt); |
| 431 | } |
| 432 | break; |
| 433 | default: |
| 434 | oz_trace("RX: Unknown elt %02x\n", elt->type); |
| 435 | } |
| 436 | elt = oz_next_elt(elt); |
| 437 | } |
| 438 | done: |
| 439 | if (pd) |
| 440 | oz_pd_put(pd); |
| 441 | consume_skb(skb); |
| 442 | } |
| 443 | /*------------------------------------------------------------------------------ |
| 444 | * Context: process |
| 445 | */ |
| 446 | void oz_protocol_term(void) |
| 447 | { |
| 448 | struct list_head *chain = 0; |
| 449 | del_timer_sync(&g_timer); |
| 450 | /* Walk the list of bindings and remove each one. |
| 451 | */ |
| 452 | spin_lock_bh(&g_binding_lock); |
| 453 | while (g_binding) { |
| 454 | struct oz_binding *b = g_binding; |
| 455 | g_binding = b->next; |
| 456 | spin_unlock_bh(&g_binding_lock); |
| 457 | dev_remove_pack(&b->ptype); |
| 458 | if (b->ptype.dev) |
| 459 | dev_put(b->ptype.dev); |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame^] | 460 | kfree(b); |
Chris Kelly | 1619cb6 | 2012-02-20 21:11:28 +0000 | [diff] [blame] | 461 | spin_lock_bh(&g_binding_lock); |
| 462 | } |
| 463 | spin_unlock_bh(&g_binding_lock); |
| 464 | /* Walk the list of PDs and stop each one. This causes the PD to be |
| 465 | * removed from the list so we can just pull each one from the head |
| 466 | * of the list. |
| 467 | */ |
| 468 | spin_lock_bh(&g_polling_lock); |
| 469 | while (!list_empty(&g_pd_list)) { |
| 470 | struct oz_pd *pd = |
| 471 | list_first_entry(&g_pd_list, struct oz_pd, link); |
| 472 | oz_pd_get(pd); |
| 473 | spin_unlock_bh(&g_polling_lock); |
| 474 | oz_pd_stop(pd); |
| 475 | oz_pd_put(pd); |
| 476 | spin_lock_bh(&g_polling_lock); |
| 477 | } |
| 478 | chain = g_timer_pool; |
| 479 | g_timer_pool = 0; |
| 480 | spin_unlock_bh(&g_polling_lock); |
| 481 | while (chain) { |
| 482 | struct oz_timer *t = container_of(chain, struct oz_timer, link); |
| 483 | chain = chain->next; |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame^] | 484 | kfree(t); |
Chris Kelly | 1619cb6 | 2012-02-20 21:11:28 +0000 | [diff] [blame] | 485 | } |
| 486 | oz_trace("Protocol stopped\n"); |
| 487 | } |
| 488 | /*------------------------------------------------------------------------------ |
| 489 | * Context: softirq |
| 490 | */ |
| 491 | static void oz_pd_handle_timer(struct oz_pd *pd, int type) |
| 492 | { |
| 493 | switch (type) { |
| 494 | case OZ_TIMER_TOUT: |
| 495 | oz_pd_sleep(pd); |
| 496 | break; |
| 497 | case OZ_TIMER_STOP: |
| 498 | oz_pd_stop(pd); |
| 499 | break; |
| 500 | case OZ_TIMER_HEARTBEAT: { |
| 501 | u16 apps = 0; |
| 502 | spin_lock_bh(&g_polling_lock); |
| 503 | pd->heartbeat_requested = 0; |
| 504 | if (pd->state & OZ_PD_S_CONNECTED) |
| 505 | apps = pd->total_apps; |
| 506 | spin_unlock_bh(&g_polling_lock); |
| 507 | if (apps) |
| 508 | oz_pd_heartbeat(pd, apps); |
| 509 | } |
| 510 | break; |
| 511 | } |
| 512 | } |
| 513 | /*------------------------------------------------------------------------------ |
| 514 | * Context: softirq |
| 515 | */ |
| 516 | static void oz_protocol_timer(unsigned long arg) |
| 517 | { |
| 518 | struct oz_timer *t; |
| 519 | struct oz_timer *t2; |
| 520 | struct oz_pd *pd; |
| 521 | spin_lock_bh(&g_polling_lock); |
| 522 | if (!g_cur_timer) { |
| 523 | /* This happens if we remove the current timer but can't stop |
| 524 | * the timer from firing. In this case just get out. |
| 525 | */ |
| 526 | oz_event_log(OZ_EVT_TIMER, 0, 0, 0, 0); |
| 527 | spin_unlock_bh(&g_polling_lock); |
| 528 | return; |
| 529 | } |
| 530 | g_timer_state = OZ_TIMER_IN_HANDLER; |
| 531 | t = g_cur_timer; |
| 532 | g_cur_timer = 0; |
| 533 | list_del(&t->link); |
| 534 | spin_unlock_bh(&g_polling_lock); |
| 535 | do { |
| 536 | pd = t->pd; |
| 537 | oz_event_log(OZ_EVT_TIMER, 0, t->type, 0, 0); |
| 538 | oz_pd_handle_timer(pd, t->type); |
| 539 | spin_lock_bh(&g_polling_lock); |
| 540 | if (g_timer_pool_count < OZ_MAX_TIMER_POOL_SIZE) { |
| 541 | t->link.next = g_timer_pool; |
| 542 | g_timer_pool = &t->link; |
| 543 | g_timer_pool_count++; |
| 544 | t = 0; |
| 545 | } |
| 546 | if (!list_empty(&g_timer_list)) { |
| 547 | t2 = container_of(g_timer_list.next, |
| 548 | struct oz_timer, link); |
| 549 | if (time_before_eq(t2->due_time, jiffies)) |
| 550 | list_del(&t2->link); |
| 551 | else |
| 552 | t2 = 0; |
| 553 | } else { |
| 554 | t2 = 0; |
| 555 | } |
| 556 | spin_unlock_bh(&g_polling_lock); |
| 557 | oz_pd_put(pd); |
| 558 | if (t) |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame^] | 559 | kfree(t); |
Chris Kelly | 1619cb6 | 2012-02-20 21:11:28 +0000 | [diff] [blame] | 560 | t = t2; |
| 561 | } while (t); |
| 562 | g_timer_state = OZ_TIMER_IDLE; |
| 563 | oz_protocol_timer_start(); |
| 564 | } |
| 565 | /*------------------------------------------------------------------------------ |
| 566 | * Context: softirq |
| 567 | */ |
| 568 | static void oz_protocol_timer_start(void) |
| 569 | { |
| 570 | spin_lock_bh(&g_polling_lock); |
| 571 | if (!list_empty(&g_timer_list)) { |
| 572 | g_cur_timer = |
| 573 | container_of(g_timer_list.next, struct oz_timer, link); |
| 574 | if (g_timer_state == OZ_TIMER_SET) { |
| 575 | oz_event_log(OZ_EVT_TIMER_CTRL, 3, |
| 576 | (u16)g_cur_timer->type, 0, |
| 577 | (unsigned)g_cur_timer->due_time); |
| 578 | mod_timer(&g_timer, g_cur_timer->due_time); |
| 579 | } else { |
| 580 | oz_event_log(OZ_EVT_TIMER_CTRL, 4, |
| 581 | (u16)g_cur_timer->type, 0, |
| 582 | (unsigned)g_cur_timer->due_time); |
| 583 | g_timer.expires = g_cur_timer->due_time; |
| 584 | g_timer.function = oz_protocol_timer; |
| 585 | g_timer.data = 0; |
| 586 | add_timer(&g_timer); |
| 587 | } |
| 588 | g_timer_state = OZ_TIMER_SET; |
| 589 | } else { |
| 590 | oz_trace("No queued timers\n"); |
| 591 | } |
| 592 | spin_unlock_bh(&g_polling_lock); |
| 593 | } |
| 594 | /*------------------------------------------------------------------------------ |
| 595 | * Context: softirq or process |
| 596 | */ |
| 597 | void oz_timer_add(struct oz_pd *pd, int type, unsigned long due_time, |
| 598 | int remove) |
| 599 | { |
| 600 | struct list_head *e; |
| 601 | struct oz_timer *t = 0; |
| 602 | int restart_needed = 0; |
| 603 | oz_event_log(OZ_EVT_TIMER_CTRL, 1, (u16)type, 0, (unsigned)due_time); |
| 604 | spin_lock(&g_polling_lock); |
| 605 | if (remove) { |
| 606 | list_for_each(e, &g_timer_list) { |
| 607 | t = container_of(e, struct oz_timer, link); |
| 608 | if ((t->pd == pd) && (t->type == type)) { |
| 609 | if (g_cur_timer == t) { |
| 610 | restart_needed = 1; |
| 611 | g_cur_timer = 0; |
| 612 | } |
| 613 | list_del(e); |
| 614 | break; |
| 615 | } |
| 616 | t = 0; |
| 617 | } |
| 618 | } |
| 619 | if (!t) { |
| 620 | if (g_timer_pool) { |
| 621 | t = container_of(g_timer_pool, struct oz_timer, link); |
| 622 | g_timer_pool = g_timer_pool->next; |
| 623 | g_timer_pool_count--; |
| 624 | } else { |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame^] | 625 | t = kmalloc(sizeof(struct oz_timer), GFP_ATOMIC); |
Chris Kelly | 1619cb6 | 2012-02-20 21:11:28 +0000 | [diff] [blame] | 626 | } |
| 627 | if (t) { |
| 628 | t->pd = pd; |
| 629 | t->type = type; |
| 630 | oz_pd_get(pd); |
| 631 | } |
| 632 | } |
| 633 | if (t) { |
| 634 | struct oz_timer *t2; |
| 635 | t->due_time = due_time; |
| 636 | list_for_each(e, &g_timer_list) { |
| 637 | t2 = container_of(e, struct oz_timer, link); |
| 638 | if (time_before(due_time, t2->due_time)) { |
| 639 | if (t2 == g_cur_timer) { |
| 640 | g_cur_timer = 0; |
| 641 | restart_needed = 1; |
| 642 | } |
| 643 | break; |
| 644 | } |
| 645 | } |
| 646 | list_add_tail(&t->link, e); |
| 647 | } |
| 648 | if (g_timer_state == OZ_TIMER_IDLE) |
| 649 | restart_needed = 1; |
| 650 | else if (g_timer_state == OZ_TIMER_IN_HANDLER) |
| 651 | restart_needed = 0; |
| 652 | spin_unlock(&g_polling_lock); |
| 653 | if (restart_needed) |
| 654 | oz_protocol_timer_start(); |
| 655 | } |
| 656 | /*------------------------------------------------------------------------------ |
| 657 | * Context: softirq or process |
| 658 | */ |
| 659 | void oz_timer_delete(struct oz_pd *pd, int type) |
| 660 | { |
| 661 | struct list_head *chain = 0; |
| 662 | struct oz_timer *t; |
| 663 | struct oz_timer *n; |
| 664 | int restart_needed = 0; |
| 665 | int release = 0; |
| 666 | oz_event_log(OZ_EVT_TIMER_CTRL, 2, (u16)type, 0, 0); |
| 667 | spin_lock(&g_polling_lock); |
| 668 | list_for_each_entry_safe(t, n, &g_timer_list, link) { |
| 669 | if ((t->pd == pd) && ((type == 0) || (t->type == type))) { |
| 670 | if (g_cur_timer == t) { |
| 671 | restart_needed = 1; |
| 672 | g_cur_timer = 0; |
| 673 | del_timer(&g_timer); |
| 674 | } |
| 675 | list_del(&t->link); |
| 676 | release++; |
| 677 | if (g_timer_pool_count < OZ_MAX_TIMER_POOL_SIZE) { |
| 678 | t->link.next = g_timer_pool; |
| 679 | g_timer_pool = &t->link; |
| 680 | g_timer_pool_count++; |
| 681 | } else { |
| 682 | t->link.next = chain; |
| 683 | chain = &t->link; |
| 684 | } |
| 685 | if (type) |
| 686 | break; |
| 687 | } |
| 688 | } |
| 689 | if (g_timer_state == OZ_TIMER_IN_HANDLER) |
| 690 | restart_needed = 0; |
| 691 | else if (restart_needed) |
| 692 | g_timer_state = OZ_TIMER_IDLE; |
| 693 | spin_unlock(&g_polling_lock); |
| 694 | if (restart_needed) |
| 695 | oz_protocol_timer_start(); |
| 696 | while (release--) |
| 697 | oz_pd_put(pd); |
| 698 | while (chain) { |
| 699 | t = container_of(chain, struct oz_timer, link); |
| 700 | chain = chain->next; |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame^] | 701 | kfree(t); |
Chris Kelly | 1619cb6 | 2012-02-20 21:11:28 +0000 | [diff] [blame] | 702 | } |
| 703 | } |
| 704 | /*------------------------------------------------------------------------------ |
| 705 | * Context: softirq or process |
| 706 | */ |
| 707 | void oz_pd_request_heartbeat(struct oz_pd *pd) |
| 708 | { |
| 709 | unsigned long now = jiffies; |
| 710 | unsigned long t; |
| 711 | spin_lock(&g_polling_lock); |
| 712 | if (pd->heartbeat_requested) { |
| 713 | spin_unlock(&g_polling_lock); |
| 714 | return; |
| 715 | } |
| 716 | if (pd->pulse_period_j) |
| 717 | t = ((now / pd->pulse_period_j) + 1) * pd->pulse_period_j; |
| 718 | else |
| 719 | t = now + 1; |
| 720 | pd->heartbeat_requested = 1; |
| 721 | spin_unlock(&g_polling_lock); |
| 722 | oz_timer_add(pd, OZ_TIMER_HEARTBEAT, t, 0); |
| 723 | } |
| 724 | /*------------------------------------------------------------------------------ |
| 725 | * Context: softirq or process |
| 726 | */ |
| 727 | struct oz_pd *oz_pd_find(u8 *mac_addr) |
| 728 | { |
| 729 | struct oz_pd *pd; |
| 730 | struct list_head *e; |
| 731 | spin_lock_bh(&g_polling_lock); |
| 732 | list_for_each(e, &g_pd_list) { |
| 733 | pd = container_of(e, struct oz_pd, link); |
| 734 | if (memcmp(pd->mac_addr, mac_addr, ETH_ALEN) == 0) { |
| 735 | atomic_inc(&pd->ref_count); |
| 736 | spin_unlock_bh(&g_polling_lock); |
| 737 | return pd; |
| 738 | } |
| 739 | } |
| 740 | spin_unlock_bh(&g_polling_lock); |
| 741 | return 0; |
| 742 | } |
| 743 | /*------------------------------------------------------------------------------ |
| 744 | * Context: process |
| 745 | */ |
| 746 | void oz_app_enable(int app_id, int enable) |
| 747 | { |
| 748 | if (app_id <= OZ_APPID_MAX) { |
| 749 | spin_lock_bh(&g_polling_lock); |
| 750 | if (enable) |
| 751 | g_apps |= (1<<app_id); |
| 752 | else |
| 753 | g_apps &= ~(1<<app_id); |
| 754 | spin_unlock_bh(&g_polling_lock); |
| 755 | } |
| 756 | } |
| 757 | /*------------------------------------------------------------------------------ |
| 758 | * Context: softirq |
| 759 | */ |
| 760 | static int oz_pkt_recv(struct sk_buff *skb, struct net_device *dev, |
| 761 | struct packet_type *pt, struct net_device *orig_dev) |
| 762 | { |
| 763 | oz_event_log(OZ_EVT_RX_FRAME, 0, 0, 0, 0); |
| 764 | skb = skb_share_check(skb, GFP_ATOMIC); |
| 765 | if (skb == 0) |
| 766 | return 0; |
| 767 | spin_lock_bh(&g_rx_queue.lock); |
| 768 | if (g_processing_rx) { |
| 769 | /* We already hold the lock so use __ variant. |
| 770 | */ |
| 771 | __skb_queue_head(&g_rx_queue, skb); |
| 772 | spin_unlock_bh(&g_rx_queue.lock); |
| 773 | } else { |
| 774 | g_processing_rx = 1; |
| 775 | do { |
| 776 | |
| 777 | spin_unlock_bh(&g_rx_queue.lock); |
| 778 | oz_rx_frame(skb); |
| 779 | spin_lock_bh(&g_rx_queue.lock); |
| 780 | if (skb_queue_empty(&g_rx_queue)) { |
| 781 | g_processing_rx = 0; |
| 782 | spin_unlock_bh(&g_rx_queue.lock); |
| 783 | break; |
| 784 | } |
| 785 | /* We already hold the lock so use __ variant. |
| 786 | */ |
| 787 | skb = __skb_dequeue(&g_rx_queue); |
| 788 | } while (1); |
| 789 | } |
| 790 | return 0; |
| 791 | } |
| 792 | /*------------------------------------------------------------------------------ |
| 793 | * Context: process |
| 794 | */ |
| 795 | void oz_binding_add(char *net_dev) |
| 796 | { |
| 797 | struct oz_binding *binding; |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame^] | 798 | |
| 799 | binding = kmalloc(sizeof(struct oz_binding), GFP_ATOMIC); |
Chris Kelly | 1619cb6 | 2012-02-20 21:11:28 +0000 | [diff] [blame] | 800 | if (binding) { |
| 801 | binding->ptype.type = __constant_htons(OZ_ETHERTYPE); |
| 802 | binding->ptype.func = oz_pkt_recv; |
| 803 | memcpy(binding->name, net_dev, OZ_MAX_BINDING_LEN); |
| 804 | if (net_dev && *net_dev) { |
| 805 | oz_trace("Adding binding: %s\n", net_dev); |
| 806 | binding->ptype.dev = |
| 807 | dev_get_by_name(&init_net, net_dev); |
| 808 | if (binding->ptype.dev == 0) { |
| 809 | oz_trace("Netdev %s not found\n", net_dev); |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame^] | 810 | kfree(binding); |
Chris Kelly | 1619cb6 | 2012-02-20 21:11:28 +0000 | [diff] [blame] | 811 | binding = 0; |
| 812 | } |
| 813 | } else { |
| 814 | oz_trace("Binding to all netcards\n"); |
| 815 | binding->ptype.dev = 0; |
| 816 | } |
| 817 | if (binding) { |
| 818 | dev_add_pack(&binding->ptype); |
| 819 | spin_lock_bh(&g_binding_lock); |
| 820 | binding->next = g_binding; |
| 821 | g_binding = binding; |
| 822 | spin_unlock_bh(&g_binding_lock); |
| 823 | } |
| 824 | } |
| 825 | } |
| 826 | /*------------------------------------------------------------------------------ |
| 827 | * Context: process |
| 828 | */ |
| 829 | static int compare_binding_name(char *s1, char *s2) |
| 830 | { |
| 831 | int i; |
| 832 | for (i = 0; i < OZ_MAX_BINDING_LEN; i++) { |
| 833 | if (*s1 != *s2) |
| 834 | return 0; |
| 835 | if (!*s1++) |
| 836 | return 1; |
| 837 | s2++; |
| 838 | } |
| 839 | return 1; |
| 840 | } |
| 841 | /*------------------------------------------------------------------------------ |
| 842 | * Context: process |
| 843 | */ |
| 844 | static void pd_stop_all_for_device(struct net_device *net_dev) |
| 845 | { |
| 846 | struct list_head h; |
| 847 | struct oz_pd *pd; |
| 848 | struct oz_pd *n; |
| 849 | INIT_LIST_HEAD(&h); |
| 850 | spin_lock_bh(&g_polling_lock); |
| 851 | list_for_each_entry_safe(pd, n, &g_pd_list, link) { |
| 852 | if (pd->net_dev == net_dev) { |
| 853 | list_move(&pd->link, &h); |
| 854 | oz_pd_get(pd); |
| 855 | } |
| 856 | } |
| 857 | spin_unlock_bh(&g_polling_lock); |
| 858 | while (!list_empty(&h)) { |
| 859 | pd = list_first_entry(&h, struct oz_pd, link); |
| 860 | oz_pd_stop(pd); |
| 861 | oz_pd_put(pd); |
| 862 | } |
| 863 | } |
| 864 | /*------------------------------------------------------------------------------ |
| 865 | * Context: process |
| 866 | */ |
| 867 | void oz_binding_remove(char *net_dev) |
| 868 | { |
| 869 | struct oz_binding *binding = 0; |
| 870 | struct oz_binding **link; |
| 871 | oz_trace("Removing binding: %s\n", net_dev); |
| 872 | spin_lock_bh(&g_binding_lock); |
| 873 | binding = g_binding; |
| 874 | link = &g_binding; |
| 875 | while (binding) { |
| 876 | if (compare_binding_name(binding->name, net_dev)) { |
| 877 | oz_trace("Binding '%s' found\n", net_dev); |
| 878 | *link = binding->next; |
| 879 | break; |
| 880 | } else { |
| 881 | link = &binding; |
| 882 | binding = binding->next; |
| 883 | } |
| 884 | } |
| 885 | spin_unlock_bh(&g_binding_lock); |
| 886 | if (binding) { |
| 887 | dev_remove_pack(&binding->ptype); |
| 888 | if (binding->ptype.dev) { |
| 889 | dev_put(binding->ptype.dev); |
| 890 | pd_stop_all_for_device(binding->ptype.dev); |
| 891 | } |
Greg Kroah-Hartman | 1ec41a3 | 2012-03-02 16:51:09 -0800 | [diff] [blame^] | 892 | kfree(binding); |
Chris Kelly | 1619cb6 | 2012-02-20 21:11:28 +0000 | [diff] [blame] | 893 | } |
| 894 | } |
| 895 | /*------------------------------------------------------------------------------ |
| 896 | * Context: process |
| 897 | */ |
| 898 | static char *oz_get_next_device_name(char *s, char *dname, int max_size) |
| 899 | { |
| 900 | while (*s == ',') |
| 901 | s++; |
| 902 | while (*s && (*s != ',') && max_size > 1) { |
| 903 | *dname++ = *s++; |
| 904 | max_size--; |
| 905 | } |
| 906 | *dname = 0; |
| 907 | return s; |
| 908 | } |
| 909 | /*------------------------------------------------------------------------------ |
| 910 | * Context: process |
| 911 | */ |
| 912 | int oz_protocol_init(char *devs) |
| 913 | { |
| 914 | skb_queue_head_init(&g_rx_queue); |
| 915 | if (devs && (devs[0] == '*')) { |
| 916 | oz_binding_add(0); |
| 917 | } else { |
| 918 | char d[32]; |
| 919 | while (*devs) { |
| 920 | devs = oz_get_next_device_name(devs, d, sizeof(d)); |
| 921 | if (d[0]) |
| 922 | oz_binding_add(d); |
| 923 | } |
| 924 | } |
| 925 | init_timer(&g_timer); |
| 926 | return 0; |
| 927 | } |
| 928 | /*------------------------------------------------------------------------------ |
| 929 | * Context: process |
| 930 | */ |
| 931 | int oz_get_pd_list(struct oz_mac_addr *addr, int max_count) |
| 932 | { |
| 933 | struct oz_pd *pd; |
| 934 | struct list_head *e; |
| 935 | int count = 0; |
| 936 | spin_lock_bh(&g_polling_lock); |
| 937 | list_for_each(e, &g_pd_list) { |
| 938 | if (count >= max_count) |
| 939 | break; |
| 940 | pd = container_of(e, struct oz_pd, link); |
| 941 | memcpy(&addr[count++], pd->mac_addr, ETH_ALEN); |
| 942 | } |
| 943 | spin_unlock_bh(&g_polling_lock); |
| 944 | return count; |
| 945 | } |
| 946 | /*------------------------------------------------------------------------------ |
| 947 | */ |
| 948 | void oz_polling_lock_bh(void) |
| 949 | { |
| 950 | spin_lock_bh(&g_polling_lock); |
| 951 | } |
| 952 | /*------------------------------------------------------------------------------ |
| 953 | */ |
| 954 | void oz_polling_unlock_bh(void) |
| 955 | { |
| 956 | spin_unlock_bh(&g_polling_lock); |
| 957 | } |