| /* |
| * IEEE 1394 for Linux |
| * |
| * Core support: hpsb_packet management, packet handling and forwarding to |
| * highlevel or lowlevel code |
| * |
| * Copyright (C) 1999, 2000 Andreas E. Bombe |
| * 2002 Manfred Weihs <weihs@ict.tuwien.ac.at> |
| * |
| * This code is licensed under the GPL. See the file COPYING in the root |
| * directory of the kernel sources for details. |
| * |
| * |
| * Contributions: |
| * |
| * Manfred Weihs <weihs@ict.tuwien.ac.at> |
| * loopback functionality in hpsb_send_packet |
| * allow highlevel drivers to disable automatic response generation |
| * and to generate responses themselves (deferred) |
| * |
| */ |
| |
| #include <linux/config.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/string.h> |
| #include <linux/init.h> |
| #include <linux/slab.h> |
| #include <linux/interrupt.h> |
| #include <linux/module.h> |
| #include <linux/proc_fs.h> |
| #include <linux/bitops.h> |
| #include <asm/byteorder.h> |
| #include <asm/semaphore.h> |
| |
| #include "ieee1394_types.h" |
| #include "ieee1394.h" |
| #include "hosts.h" |
| #include "ieee1394_core.h" |
| #include "highlevel.h" |
| #include "ieee1394_transactions.h" |
| #include "csr.h" |
| #include "nodemgr.h" |
| #include "dma.h" |
| #include "iso.h" |
| |
| /* |
| * Disable the nodemgr detection and config rom reading functionality. |
| */ |
| MODULE_PARM(disable_nodemgr, "i"); |
| MODULE_PARM_DESC(disable_nodemgr, "Disable nodemgr functionality."); |
| static int disable_nodemgr = 0; |
| |
| /* We are GPL, so treat us special */ |
| MODULE_LICENSE("GPL"); |
| |
| static kmem_cache_t *hpsb_packet_cache; |
| |
| /* Some globals used */ |
| const char *hpsb_speedto_str[] = { "S100", "S200", "S400", "S800", "S1600", "S3200" }; |
| |
| #ifdef CONFIG_IEEE1394_VERBOSEDEBUG |
| static void dump_packet(const char *text, quadlet_t *data, int size) |
| { |
| int i; |
| |
| size /= 4; |
| size = (size > 4 ? 4 : size); |
| |
| printk(KERN_DEBUG "ieee1394: %s", text); |
| for (i = 0; i < size; i++) |
| printk(" %08x", data[i]); |
| printk("\n"); |
| } |
| #else |
| #define dump_packet(x,y,z) |
| #endif |
| |
| static void run_packet_complete(struct hpsb_packet *packet) |
| { |
| if (packet->complete_routine != NULL) { |
| void (*complete_routine)(void*) = packet->complete_routine; |
| void *complete_data = packet->complete_data; |
| |
| packet->complete_routine = NULL; |
| packet->complete_data = NULL; |
| complete_routine(complete_data); |
| } |
| return; |
| } |
| |
| /** |
| * hpsb_set_packet_complete_task - set the task that runs when a packet |
| * completes. You cannot call this more than once on a single packet |
| * before it is sent. |
| * |
| * @packet: the packet whose completion we want the task added to |
| * @routine: function to call |
| * @data: data (if any) to pass to the above function |
| */ |
| void hpsb_set_packet_complete_task(struct hpsb_packet *packet, |
| void (*routine)(void *), void *data) |
| { |
| BUG_ON(packet->complete_routine != NULL); |
| packet->complete_routine = routine; |
| packet->complete_data = data; |
| return; |
| } |
| |
| /** |
| * alloc_hpsb_packet - allocate new packet structure |
| * @data_size: size of the data block to be allocated |
| * |
| * This function allocates, initializes and returns a new &struct hpsb_packet. |
| * It can be used in interrupt context. A header block is always included, its |
| * size is big enough to contain all possible 1394 headers. The data block is |
| * only allocated when @data_size is not zero. |
| * |
| * For packets for which responses will be received the @data_size has to be big |
| * enough to contain the response's data block since no further allocation |
| * occurs at response matching time. |
| * |
| * The packet's generation value will be set to the current generation number |
| * for ease of use. Remember to overwrite it with your own recorded generation |
| * number if you can not be sure that your code will not race with a bus reset. |
| * |
| * Return value: A pointer to a &struct hpsb_packet or NULL on allocation |
| * failure. |
| */ |
| struct hpsb_packet *alloc_hpsb_packet(size_t data_size) |
| { |
| struct hpsb_packet *packet = NULL; |
| void *data = NULL; |
| |
| packet = kmem_cache_alloc(hpsb_packet_cache, GFP_ATOMIC); |
| if (packet == NULL) |
| return NULL; |
| |
| memset(packet, 0, sizeof(struct hpsb_packet)); |
| packet->header = packet->embedded_header; |
| |
| if (data_size) { |
| data = kmalloc(data_size + 8, GFP_ATOMIC); |
| if (data == NULL) { |
| kmem_cache_free(hpsb_packet_cache, packet); |
| return NULL; |
| } |
| |
| packet->data = data; |
| packet->data_size = data_size; |
| } |
| |
| INIT_LIST_HEAD(&packet->list); |
| sema_init(&packet->state_change, 0); |
| packet->complete_routine = NULL; |
| packet->complete_data = NULL; |
| packet->state = hpsb_unused; |
| packet->generation = -1; |
| packet->data_be = 1; |
| |
| return packet; |
| } |
| |
| |
| /** |
| * free_hpsb_packet - free packet and data associated with it |
| * @packet: packet to free (is NULL safe) |
| * |
| * This function will free packet->data, packet->header and finally the packet |
| * itself. |
| */ |
| void free_hpsb_packet(struct hpsb_packet *packet) |
| { |
| if (!packet) return; |
| |
| kfree(packet->data); |
| kmem_cache_free(hpsb_packet_cache, packet); |
| } |
| |
| |
| int hpsb_reset_bus(struct hpsb_host *host, int type) |
| { |
| if (!host->in_bus_reset) { |
| host->driver->devctl(host, RESET_BUS, type); |
| return 0; |
| } else { |
| return 1; |
| } |
| } |
| |
| |
| int hpsb_bus_reset(struct hpsb_host *host) |
| { |
| if (host->in_bus_reset) { |
| HPSB_NOTICE("%s called while bus reset already in progress", |
| __FUNCTION__); |
| return 1; |
| } |
| |
| abort_requests(host); |
| host->in_bus_reset = 1; |
| host->irm_id = -1; |
| host->is_irm = 0; |
| host->busmgr_id = -1; |
| host->is_busmgr = 0; |
| host->is_cycmst = 0; |
| host->node_count = 0; |
| host->selfid_count = 0; |
| |
| return 0; |
| } |
| |
| |
| /* |
| * Verify num_of_selfids SelfIDs and return number of nodes. Return zero in |
| * case verification failed. |
| */ |
| static int check_selfids(struct hpsb_host *host) |
| { |
| int nodeid = -1; |
| int rest_of_selfids = host->selfid_count; |
| struct selfid *sid = (struct selfid *)host->topology_map; |
| struct ext_selfid *esid; |
| int esid_seq = 23; |
| |
| host->nodes_active = 0; |
| |
| while (rest_of_selfids--) { |
| if (!sid->extended) { |
| nodeid++; |
| esid_seq = 0; |
| |
| if (sid->phy_id != nodeid) { |
| HPSB_INFO("SelfIDs failed monotony check with " |
| "%d", sid->phy_id); |
| return 0; |
| } |
| |
| if (sid->link_active) { |
| host->nodes_active++; |
| if (sid->contender) |
| host->irm_id = LOCAL_BUS | sid->phy_id; |
| } |
| } else { |
| esid = (struct ext_selfid *)sid; |
| |
| if ((esid->phy_id != nodeid) |
| || (esid->seq_nr != esid_seq)) { |
| HPSB_INFO("SelfIDs failed monotony check with " |
| "%d/%d", esid->phy_id, esid->seq_nr); |
| return 0; |
| } |
| esid_seq++; |
| } |
| sid++; |
| } |
| |
| esid = (struct ext_selfid *)(sid - 1); |
| while (esid->extended) { |
| if ((esid->porta == 0x2) || (esid->portb == 0x2) |
| || (esid->portc == 0x2) || (esid->portd == 0x2) |
| || (esid->porte == 0x2) || (esid->portf == 0x2) |
| || (esid->portg == 0x2) || (esid->porth == 0x2)) { |
| HPSB_INFO("SelfIDs failed root check on " |
| "extended SelfID"); |
| return 0; |
| } |
| esid--; |
| } |
| |
| sid = (struct selfid *)esid; |
| if ((sid->port0 == 0x2) || (sid->port1 == 0x2) || (sid->port2 == 0x2)) { |
| HPSB_INFO("SelfIDs failed root check"); |
| return 0; |
| } |
| |
| host->node_count = nodeid + 1; |
| return 1; |
| } |
| |
| static void build_speed_map(struct hpsb_host *host, int nodecount) |
| { |
| u8 speedcap[nodecount]; |
| u8 cldcnt[nodecount]; |
| u8 *map = host->speed_map; |
| struct selfid *sid; |
| struct ext_selfid *esid; |
| int i, j, n; |
| |
| for (i = 0; i < (nodecount * 64); i += 64) { |
| for (j = 0; j < nodecount; j++) { |
| map[i+j] = IEEE1394_SPEED_MAX; |
| } |
| } |
| |
| for (i = 0; i < nodecount; i++) { |
| cldcnt[i] = 0; |
| } |
| |
| /* find direct children count and speed */ |
| for (sid = (struct selfid *)&host->topology_map[host->selfid_count-1], |
| n = nodecount - 1; |
| (void *)sid >= (void *)host->topology_map; sid--) { |
| if (sid->extended) { |
| esid = (struct ext_selfid *)sid; |
| |
| if (esid->porta == 0x3) cldcnt[n]++; |
| if (esid->portb == 0x3) cldcnt[n]++; |
| if (esid->portc == 0x3) cldcnt[n]++; |
| if (esid->portd == 0x3) cldcnt[n]++; |
| if (esid->porte == 0x3) cldcnt[n]++; |
| if (esid->portf == 0x3) cldcnt[n]++; |
| if (esid->portg == 0x3) cldcnt[n]++; |
| if (esid->porth == 0x3) cldcnt[n]++; |
| } else { |
| if (sid->port0 == 0x3) cldcnt[n]++; |
| if (sid->port1 == 0x3) cldcnt[n]++; |
| if (sid->port2 == 0x3) cldcnt[n]++; |
| |
| speedcap[n] = sid->speed; |
| n--; |
| } |
| } |
| |
| /* set self mapping */ |
| for (i = 0; i < nodecount; i++) { |
| map[64*i + i] = speedcap[i]; |
| } |
| |
| /* fix up direct children count to total children count; |
| * also fix up speedcaps for sibling and parent communication */ |
| for (i = 1; i < nodecount; i++) { |
| for (j = cldcnt[i], n = i - 1; j > 0; j--) { |
| cldcnt[i] += cldcnt[n]; |
| speedcap[n] = min(speedcap[n], speedcap[i]); |
| n -= cldcnt[n] + 1; |
| } |
| } |
| |
| for (n = 0; n < nodecount; n++) { |
| for (i = n - cldcnt[n]; i <= n; i++) { |
| for (j = 0; j < (n - cldcnt[n]); j++) { |
| map[j*64 + i] = map[i*64 + j] = |
| min(map[i*64 + j], speedcap[n]); |
| } |
| for (j = n + 1; j < nodecount; j++) { |
| map[j*64 + i] = map[i*64 + j] = |
| min(map[i*64 + j], speedcap[n]); |
| } |
| } |
| } |
| } |
| |
| |
| void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid) |
| { |
| if (host->in_bus_reset) { |
| HPSB_VERBOSE("Including SelfID 0x%x", sid); |
| host->topology_map[host->selfid_count++] = sid; |
| } else { |
| HPSB_NOTICE("Spurious SelfID packet (0x%08x) received from bus %d", |
| sid, NODEID_TO_BUS(host->node_id)); |
| } |
| } |
| |
| void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot) |
| { |
| if (!host->in_bus_reset) |
| HPSB_NOTICE("SelfID completion called outside of bus reset!"); |
| |
| host->node_id = LOCAL_BUS | phyid; |
| host->is_root = isroot; |
| |
| if (!check_selfids(host)) { |
| if (host->reset_retries++ < 20) { |
| /* selfid stage did not complete without error */ |
| HPSB_NOTICE("Error in SelfID stage, resetting"); |
| host->in_bus_reset = 0; |
| /* this should work from ohci1394 now... */ |
| hpsb_reset_bus(host, LONG_RESET); |
| return; |
| } else { |
| HPSB_NOTICE("Stopping out-of-control reset loop"); |
| HPSB_NOTICE("Warning - topology map and speed map will not be valid"); |
| host->reset_retries = 0; |
| } |
| } else { |
| host->reset_retries = 0; |
| build_speed_map(host, host->node_count); |
| } |
| |
| HPSB_VERBOSE("selfid_complete called with successful SelfID stage " |
| "... irm_id: 0x%X node_id: 0x%X",host->irm_id,host->node_id); |
| |
| /* irm_id is kept up to date by check_selfids() */ |
| if (host->irm_id == host->node_id) { |
| host->is_irm = 1; |
| } else { |
| host->is_busmgr = 0; |
| host->is_irm = 0; |
| } |
| |
| if (isroot) { |
| host->driver->devctl(host, ACT_CYCLE_MASTER, 1); |
| host->is_cycmst = 1; |
| } |
| atomic_inc(&host->generation); |
| host->in_bus_reset = 0; |
| highlevel_host_reset(host); |
| } |
| |
| |
| void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet, |
| int ackcode) |
| { |
| unsigned long flags; |
| |
| packet->ack_code = ackcode; |
| |
| if (packet->no_waiter) { |
| /* must not have a tlabel allocated */ |
| free_hpsb_packet(packet); |
| return; |
| } |
| |
| if (ackcode != ACK_PENDING || !packet->expect_response) { |
| packet->state = hpsb_complete; |
| up(&packet->state_change); |
| up(&packet->state_change); |
| run_packet_complete(packet); |
| return; |
| } |
| |
| packet->state = hpsb_pending; |
| packet->sendtime = jiffies; |
| |
| spin_lock_irqsave(&host->pending_pkt_lock, flags); |
| list_add_tail(&packet->list, &host->pending_packets); |
| spin_unlock_irqrestore(&host->pending_pkt_lock, flags); |
| |
| up(&packet->state_change); |
| mod_timer(&host->timeout, jiffies + host->timeout_interval); |
| } |
| |
| /** |
| * hpsb_send_phy_config - transmit a PHY configuration packet on the bus |
| * @host: host that PHY config packet gets sent through |
| * @rootid: root whose force_root bit should get set (-1 = don't set force_root) |
| * @gapcnt: gap count value to set (-1 = don't set gap count) |
| * |
| * This function sends a PHY config packet on the bus through the specified host. |
| * |
| * Return value: 0 for success or error number otherwise. |
| */ |
| int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt) |
| { |
| struct hpsb_packet *packet; |
| int retval = 0; |
| |
| if (rootid >= ALL_NODES || rootid < -1 || gapcnt > 0x3f || gapcnt < -1 || |
| (rootid == -1 && gapcnt == -1)) { |
| HPSB_DEBUG("Invalid Parameter: rootid = %d gapcnt = %d", |
| rootid, gapcnt); |
| return -EINVAL; |
| } |
| |
| packet = alloc_hpsb_packet(0); |
| if (!packet) |
| return -ENOMEM; |
| |
| packet->host = host; |
| packet->header_size = 8; |
| packet->data_size = 0; |
| packet->expect_response = 0; |
| packet->no_waiter = 0; |
| packet->type = hpsb_raw; |
| packet->header[0] = 0; |
| if (rootid != -1) |
| packet->header[0] |= rootid << 24 | 1 << 23; |
| if (gapcnt != -1) |
| packet->header[0] |= gapcnt << 16 | 1 << 22; |
| |
| packet->header[1] = ~packet->header[0]; |
| |
| packet->generation = get_hpsb_generation(host); |
| |
| if (!hpsb_send_packet(packet)) { |
| retval = -EINVAL; |
| goto fail; |
| } |
| |
| down(&packet->state_change); |
| down(&packet->state_change); |
| |
| fail: |
| free_hpsb_packet(packet); |
| |
| return retval; |
| } |
| |
| /** |
| * hpsb_send_packet - transmit a packet on the bus |
| * @packet: packet to send |
| * |
| * The packet is sent through the host specified in the packet->host field. |
| * Before sending, the packet's transmit speed is automatically determined using |
| * the local speed map when it is an async, non-broadcast packet. |
| * |
| * Possibilities for failure are that host is either not initialized, in bus |
| * reset, the packet's generation number doesn't match the current generation |
| * number or the host reports a transmit error. |
| * |
| * Return value: False (0) on failure, true (1) otherwise. |
| */ |
| int hpsb_send_packet(struct hpsb_packet *packet) |
| { |
| struct hpsb_host *host = packet->host; |
| |
| if (host->is_shutdown || host->in_bus_reset |
| || (packet->generation != get_hpsb_generation(host))) { |
| return 0; |
| } |
| |
| packet->state = hpsb_queued; |
| |
| if (packet->node_id == host->node_id) |
| { /* it is a local request, so handle it locally */ |
| quadlet_t *data; |
| size_t size=packet->data_size+packet->header_size; |
| |
| data = kmalloc(packet->header_size + packet->data_size, GFP_ATOMIC); |
| if (!data) { |
| HPSB_ERR("unable to allocate memory for concatenating header and data"); |
| return 0; |
| } |
| |
| memcpy(data, packet->header, packet->header_size); |
| |
| if (packet->data_size) |
| { |
| if (packet->data_be) { |
| memcpy(((u8*)data)+packet->header_size, packet->data, packet->data_size); |
| } else { |
| int i; |
| quadlet_t *my_data=(quadlet_t*) ((u8*) data + packet->data_size); |
| for (i=0; i < packet->data_size/4; i++) { |
| my_data[i] = cpu_to_be32(packet->data[i]); |
| } |
| } |
| } |
| |
| dump_packet("send packet local:", packet->header, |
| packet->header_size); |
| |
| hpsb_packet_sent(host, packet, packet->expect_response?ACK_PENDING:ACK_COMPLETE); |
| hpsb_packet_received(host, data, size, 0); |
| |
| kfree(data); |
| |
| return 1; |
| } |
| |
| if (packet->type == hpsb_async && packet->node_id != ALL_NODES) { |
| packet->speed_code = |
| host->speed_map[NODEID_TO_NODE(host->node_id) * 64 |
| + NODEID_TO_NODE(packet->node_id)]; |
| } |
| |
| switch (packet->speed_code) { |
| case 2: |
| dump_packet("send packet 400:", packet->header, |
| packet->header_size); |
| break; |
| case 1: |
| dump_packet("send packet 200:", packet->header, |
| packet->header_size); |
| break; |
| default: |
| dump_packet("send packet 100:", packet->header, |
| packet->header_size); |
| } |
| |
| return host->driver->transmit_packet(host, packet); |
| } |
| |
| static void send_packet_nocare(struct hpsb_packet *packet) |
| { |
| if (!hpsb_send_packet(packet)) { |
| free_hpsb_packet(packet); |
| } |
| } |
| |
| |
| void handle_packet_response(struct hpsb_host *host, int tcode, quadlet_t *data, |
| size_t size) |
| { |
| struct hpsb_packet *packet = NULL; |
| struct list_head *lh; |
| int tcode_match = 0; |
| int tlabel; |
| unsigned long flags; |
| |
| tlabel = (data[0] >> 10) & 0x3f; |
| |
| spin_lock_irqsave(&host->pending_pkt_lock, flags); |
| |
| list_for_each(lh, &host->pending_packets) { |
| packet = list_entry(lh, struct hpsb_packet, list); |
| if ((packet->tlabel == tlabel) |
| && (packet->node_id == (data[1] >> 16))){ |
| break; |
| } |
| } |
| |
| if (lh == &host->pending_packets) { |
| HPSB_DEBUG("unsolicited response packet received - no tlabel match"); |
| dump_packet("contents:", data, 16); |
| spin_unlock_irqrestore(&host->pending_pkt_lock, flags); |
| return; |
| } |
| |
| switch (packet->tcode) { |
| case TCODE_WRITEQ: |
| case TCODE_WRITEB: |
| if (tcode == TCODE_WRITE_RESPONSE) tcode_match = 1; |
| break; |
| case TCODE_READQ: |
| if (tcode == TCODE_READQ_RESPONSE) tcode_match = 1; |
| break; |
| case TCODE_READB: |
| if (tcode == TCODE_READB_RESPONSE) tcode_match = 1; |
| break; |
| case TCODE_LOCK_REQUEST: |
| if (tcode == TCODE_LOCK_RESPONSE) tcode_match = 1; |
| break; |
| } |
| |
| if (!tcode_match || (packet->tlabel != tlabel) |
| || (packet->node_id != (data[1] >> 16))) { |
| HPSB_INFO("unsolicited response packet received - tcode mismatch"); |
| dump_packet("contents:", data, 16); |
| |
| spin_unlock_irqrestore(&host->pending_pkt_lock, flags); |
| return; |
| } |
| |
| list_del(&packet->list); |
| |
| spin_unlock_irqrestore(&host->pending_pkt_lock, flags); |
| |
| /* FIXME - update size fields? */ |
| switch (tcode) { |
| case TCODE_WRITE_RESPONSE: |
| memcpy(packet->header, data, 12); |
| break; |
| case TCODE_READQ_RESPONSE: |
| memcpy(packet->header, data, 16); |
| break; |
| case TCODE_READB_RESPONSE: |
| memcpy(packet->header, data, 16); |
| memcpy(packet->data, data + 4, size - 16); |
| break; |
| case TCODE_LOCK_RESPONSE: |
| memcpy(packet->header, data, 16); |
| memcpy(packet->data, data + 4, (size - 16) > 8 ? 8 : size - 16); |
| break; |
| } |
| |
| packet->state = hpsb_complete; |
| up(&packet->state_change); |
| run_packet_complete(packet); |
| } |
| |
| |
| static struct hpsb_packet *create_reply_packet(struct hpsb_host *host, |
| quadlet_t *data, size_t dsize) |
| { |
| struct hpsb_packet *p; |
| |
| dsize += (dsize % 4 ? 4 - (dsize % 4) : 0); |
| |
| p = alloc_hpsb_packet(dsize); |
| if (p == NULL) { |
| /* FIXME - send data_error response */ |
| return NULL; |
| } |
| |
| p->type = hpsb_async; |
| p->state = hpsb_unused; |
| p->host = host; |
| p->node_id = data[1] >> 16; |
| p->tlabel = (data[0] >> 10) & 0x3f; |
| p->no_waiter = 1; |
| |
| p->generation = get_hpsb_generation(host); |
| |
| if (dsize % 4) { |
| p->data[dsize / 4] = 0; |
| } |
| |
| return p; |
| } |
| |
| #define PREP_ASYNC_HEAD_RCODE(tc) \ |
| packet->tcode = tc; \ |
| packet->header[0] = (packet->node_id << 16) | (packet->tlabel << 10) \ |
| | (1 << 8) | (tc << 4); \ |
| packet->header[1] = (packet->host->node_id << 16) | (rcode << 12); \ |
| packet->header[2] = 0 |
| |
| static void fill_async_readquad_resp(struct hpsb_packet *packet, int rcode, |
| quadlet_t data) |
| { |
| PREP_ASYNC_HEAD_RCODE(TCODE_READQ_RESPONSE); |
| packet->header[3] = data; |
| packet->header_size = 16; |
| packet->data_size = 0; |
| } |
| |
| static void fill_async_readblock_resp(struct hpsb_packet *packet, int rcode, |
| int length) |
| { |
| if (rcode != RCODE_COMPLETE) |
| length = 0; |
| |
| PREP_ASYNC_HEAD_RCODE(TCODE_READB_RESPONSE); |
| packet->header[3] = length << 16; |
| packet->header_size = 16; |
| packet->data_size = length + (length % 4 ? 4 - (length % 4) : 0); |
| } |
| |
| static void fill_async_write_resp(struct hpsb_packet *packet, int rcode) |
| { |
| PREP_ASYNC_HEAD_RCODE(TCODE_WRITE_RESPONSE); |
| packet->header[2] = 0; |
| packet->header_size = 12; |
| packet->data_size = 0; |
| } |
| |
| static void fill_async_lock_resp(struct hpsb_packet *packet, int rcode, int extcode, |
| int length) |
| { |
| if (rcode != RCODE_COMPLETE) |
| length = 0; |
| |
| PREP_ASYNC_HEAD_RCODE(TCODE_LOCK_RESPONSE); |
| packet->header[3] = (length << 16) | extcode; |
| packet->header_size = 16; |
| packet->data_size = length; |
| } |
| |
| #define PREP_REPLY_PACKET(length) \ |
| packet = create_reply_packet(host, data, length); \ |
| if (packet == NULL) break |
| |
| static void handle_incoming_packet(struct hpsb_host *host, int tcode, |
| quadlet_t *data, size_t size, int write_acked) |
| { |
| struct hpsb_packet *packet; |
| int length, rcode, extcode; |
| quadlet_t buffer; |
| nodeid_t source = data[1] >> 16; |
| nodeid_t dest = data[0] >> 16; |
| u16 flags = (u16) data[0]; |
| u64 addr; |
| |
| /* big FIXME - no error checking is done for an out of bounds length */ |
| |
| switch (tcode) { |
| case TCODE_WRITEQ: |
| addr = (((u64)(data[1] & 0xffff)) << 32) | data[2]; |
| rcode = highlevel_write(host, source, dest, data+3, |
| addr, 4, flags); |
| |
| if (!write_acked |
| && (NODEID_TO_NODE(data[0] >> 16) != NODE_MASK) |
| && (rcode >= 0)) { |
| /* not a broadcast write, reply */ |
| PREP_REPLY_PACKET(0); |
| fill_async_write_resp(packet, rcode); |
| send_packet_nocare(packet); |
| } |
| break; |
| |
| case TCODE_WRITEB: |
| addr = (((u64)(data[1] & 0xffff)) << 32) | data[2]; |
| rcode = highlevel_write(host, source, dest, data+4, |
| addr, data[3]>>16, flags); |
| |
| if (!write_acked |
| && (NODEID_TO_NODE(data[0] >> 16) != NODE_MASK) |
| && (rcode >= 0)) { |
| /* not a broadcast write, reply */ |
| PREP_REPLY_PACKET(0); |
| fill_async_write_resp(packet, rcode); |
| send_packet_nocare(packet); |
| } |
| break; |
| |
| case TCODE_READQ: |
| addr = (((u64)(data[1] & 0xffff)) << 32) | data[2]; |
| rcode = highlevel_read(host, source, &buffer, addr, 4, flags); |
| |
| if (rcode >= 0) { |
| PREP_REPLY_PACKET(0); |
| fill_async_readquad_resp(packet, rcode, buffer); |
| send_packet_nocare(packet); |
| } |
| break; |
| |
| case TCODE_READB: |
| length = data[3] >> 16; |
| PREP_REPLY_PACKET(length); |
| |
| addr = (((u64)(data[1] & 0xffff)) << 32) | data[2]; |
| rcode = highlevel_read(host, source, packet->data, addr, |
| length, flags); |
| |
| if (rcode >= 0) { |
| fill_async_readblock_resp(packet, rcode, length); |
| send_packet_nocare(packet); |
| } else { |
| free_hpsb_packet(packet); |
| } |
| break; |
| |
| case TCODE_LOCK_REQUEST: |
| length = data[3] >> 16; |
| extcode = data[3] & 0xffff; |
| addr = (((u64)(data[1] & 0xffff)) << 32) | data[2]; |
| |
| PREP_REPLY_PACKET(8); |
| |
| if ((extcode == 0) || (extcode >= 7)) { |
| /* let switch default handle error */ |
| length = 0; |
| } |
| |
| switch (length) { |
| case 4: |
| rcode = highlevel_lock(host, source, packet->data, addr, |
| data[4], 0, extcode,flags); |
| fill_async_lock_resp(packet, rcode, extcode, 4); |
| break; |
| case 8: |
| if ((extcode != EXTCODE_FETCH_ADD) |
| && (extcode != EXTCODE_LITTLE_ADD)) { |
| rcode = highlevel_lock(host, source, |
| packet->data, addr, |
| data[5], data[4], |
| extcode, flags); |
| fill_async_lock_resp(packet, rcode, extcode, 4); |
| } else { |
| rcode = highlevel_lock64(host, source, |
| (octlet_t *)packet->data, addr, |
| *(octlet_t *)(data + 4), 0ULL, |
| extcode, flags); |
| fill_async_lock_resp(packet, rcode, extcode, 8); |
| } |
| break; |
| case 16: |
| rcode = highlevel_lock64(host, source, |
| (octlet_t *)packet->data, addr, |
| *(octlet_t *)(data + 6), |
| *(octlet_t *)(data + 4), |
| extcode, flags); |
| fill_async_lock_resp(packet, rcode, extcode, 8); |
| break; |
| default: |
| rcode = RCODE_TYPE_ERROR; |
| fill_async_lock_resp(packet, rcode, |
| extcode, 0); |
| } |
| |
| if (rcode >= 0) { |
| send_packet_nocare(packet); |
| } else { |
| free_hpsb_packet(packet); |
| } |
| break; |
| } |
| |
| } |
| #undef PREP_REPLY_PACKET |
| |
| |
| void hpsb_packet_received(struct hpsb_host *host, quadlet_t *data, size_t size, |
| int write_acked) |
| { |
| int tcode; |
| |
| if (host->in_bus_reset) { |
| HPSB_INFO("received packet during reset; ignoring"); |
| return; |
| } |
| |
| dump_packet("received packet:", data, size); |
| |
| tcode = (data[0] >> 4) & 0xf; |
| |
| switch (tcode) { |
| case TCODE_WRITE_RESPONSE: |
| case TCODE_READQ_RESPONSE: |
| case TCODE_READB_RESPONSE: |
| case TCODE_LOCK_RESPONSE: |
| handle_packet_response(host, tcode, data, size); |
| break; |
| |
| case TCODE_WRITEQ: |
| case TCODE_WRITEB: |
| case TCODE_READQ: |
| case TCODE_READB: |
| case TCODE_LOCK_REQUEST: |
| handle_incoming_packet(host, tcode, data, size, write_acked); |
| break; |
| |
| |
| case TCODE_ISO_DATA: |
| highlevel_iso_receive(host, data, size); |
| break; |
| |
| case TCODE_CYCLE_START: |
| /* simply ignore this packet if it is passed on */ |
| break; |
| |
| default: |
| HPSB_NOTICE("received packet with bogus transaction code %d", |
| tcode); |
| break; |
| } |
| } |
| |
| |
| void abort_requests(struct hpsb_host *host) |
| { |
| unsigned long flags; |
| struct hpsb_packet *packet; |
| struct list_head *lh, *tlh; |
| LIST_HEAD(llist); |
| |
| host->driver->devctl(host, CANCEL_REQUESTS, 0); |
| |
| spin_lock_irqsave(&host->pending_pkt_lock, flags); |
| list_splice(&host->pending_packets, &llist); |
| INIT_LIST_HEAD(&host->pending_packets); |
| spin_unlock_irqrestore(&host->pending_pkt_lock, flags); |
| |
| list_for_each_safe(lh, tlh, &llist) { |
| packet = list_entry(lh, struct hpsb_packet, list); |
| list_del(&packet->list); |
| packet->state = hpsb_complete; |
| packet->ack_code = ACKX_ABORTED; |
| up(&packet->state_change); |
| run_packet_complete(packet); |
| } |
| } |
| |
| void abort_timedouts(unsigned long __opaque) |
| { |
| struct hpsb_host *host = (struct hpsb_host *)__opaque; |
| unsigned long flags; |
| struct hpsb_packet *packet; |
| unsigned long expire; |
| struct list_head *lh, *tlh; |
| LIST_HEAD(expiredlist); |
| |
| spin_lock_irqsave(&host->csr.lock, flags); |
| expire = host->csr.expire; |
| spin_unlock_irqrestore(&host->csr.lock, flags); |
| |
| spin_lock_irqsave(&host->pending_pkt_lock, flags); |
| |
| list_for_each_safe(lh, tlh, &host->pending_packets) { |
| packet = list_entry(lh, struct hpsb_packet, list); |
| if (time_before(packet->sendtime + expire, jiffies)) { |
| list_del(&packet->list); |
| list_add(&packet->list, &expiredlist); |
| } |
| } |
| |
| if (!list_empty(&host->pending_packets)) |
| mod_timer(&host->timeout, jiffies + host->timeout_interval); |
| |
| spin_unlock_irqrestore(&host->pending_pkt_lock, flags); |
| |
| list_for_each_safe(lh, tlh, &expiredlist) { |
| packet = list_entry(lh, struct hpsb_packet, list); |
| list_del(&packet->list); |
| packet->state = hpsb_complete; |
| packet->ack_code = ACKX_TIMEOUT; |
| up(&packet->state_change); |
| run_packet_complete(packet); |
| } |
| } |
| |
| |
| /* |
| * character device dispatching (see ieee1394_core.h) |
| * Dan Maas <dmaas@dcine.com> |
| */ |
| |
| static struct { |
| struct file_operations *file_ops; |
| struct module *module; |
| } ieee1394_chardevs[16]; |
| |
| static rwlock_t ieee1394_chardevs_lock = RW_LOCK_UNLOCKED; |
| |
| static int ieee1394_dispatch_open(struct inode *inode, struct file *file); |
| |
| static struct file_operations ieee1394_chardev_ops = { |
| .owner =THIS_MODULE, |
| .open = ieee1394_dispatch_open, |
| }; |
| |
| devfs_handle_t ieee1394_devfs_handle; |
| |
| |
| /* claim a block of minor numbers */ |
| int ieee1394_register_chardev(int blocknum, |
| struct module *module, |
| struct file_operations *file_ops) |
| { |
| int retval; |
| |
| if ( (blocknum < 0) || (blocknum > 15) ) |
| return -EINVAL; |
| |
| write_lock(&ieee1394_chardevs_lock); |
| |
| if (ieee1394_chardevs[blocknum].file_ops == NULL) { |
| /* grab the minor block */ |
| ieee1394_chardevs[blocknum].file_ops = file_ops; |
| ieee1394_chardevs[blocknum].module = module; |
| |
| retval = 0; |
| } else { |
| /* block already taken */ |
| retval = -EBUSY; |
| } |
| |
| write_unlock(&ieee1394_chardevs_lock); |
| |
| return retval; |
| } |
| |
| /* release a block of minor numbers */ |
| void ieee1394_unregister_chardev(int blocknum) |
| { |
| if ( (blocknum < 0) || (blocknum > 15) ) |
| return; |
| |
| write_lock(&ieee1394_chardevs_lock); |
| |
| if (ieee1394_chardevs[blocknum].file_ops) { |
| ieee1394_chardevs[blocknum].file_ops = NULL; |
| ieee1394_chardevs[blocknum].module = NULL; |
| } |
| |
| write_unlock(&ieee1394_chardevs_lock); |
| } |
| |
| /* |
| ieee1394_get_chardev() - look up and acquire a character device |
| driver that has previously registered using ieee1394_register_chardev() |
| |
| On success, returns 1 and sets module and file_ops to the driver. |
| The module will have an incremented reference count. |
| |
| On failure, returns 0. |
| The module will NOT have an incremented reference count. |
| */ |
| |
| static int ieee1394_get_chardev(int blocknum, |
| struct module **module, |
| struct file_operations **file_ops) |
| { |
| int ret = 0; |
| |
| if ((blocknum < 0) || (blocknum > 15)) |
| return ret; |
| |
| read_lock(&ieee1394_chardevs_lock); |
| |
| *module = ieee1394_chardevs[blocknum].module; |
| *file_ops = ieee1394_chardevs[blocknum].file_ops; |
| |
| if (*file_ops == NULL) |
| goto out; |
| |
| /* don't need try_inc_mod_count if the driver is non-modular */ |
| if (*module && (try_inc_mod_count(*module) == 0)) |
| goto out; |
| |
| /* success! */ |
| ret = 1; |
| |
| out: |
| read_unlock(&ieee1394_chardevs_lock); |
| return ret; |
| } |
| |
| /* the point of entry for open() on any ieee1394 character device */ |
| static int ieee1394_dispatch_open(struct inode *inode, struct file *file) |
| { |
| struct file_operations *file_ops; |
| struct module *module; |
| int blocknum; |
| int retval; |
| |
| /* |
| Maintaining correct module reference counts is tricky here! |
| |
| The key thing to remember is that the VFS increments the |
| reference count of ieee1394 before it calls |
| ieee1394_dispatch_open(). |
| |
| If the open() succeeds, then we need to transfer this extra |
| reference to the task-specific driver module (e.g. raw1394). |
| The VFS will deref the driver module automatically when the |
| file is later released. |
| |
| If the open() fails, then the VFS will drop the |
| reference count of whatever module file->f_op->owner points |
| to, immediately after this function returns. |
| */ |
| |
| /* shift away lower four bits of the minor |
| to get the index of the ieee1394_driver |
| we want */ |
| |
| blocknum = (MINOR(inode->i_rdev) >> 4) & 0xF; |
| |
| /* look up the driver */ |
| |
| if (ieee1394_get_chardev(blocknum, &module, &file_ops) == 0) |
| return -ENODEV; |
| |
| /* redirect all subsequent requests to the driver's |
| own file_operations */ |
| file->f_op = file_ops; |
| |
| /* at this point BOTH ieee1394 and the task-specific driver have |
| an extra reference */ |
| |
| /* follow through with the open() */ |
| retval = file_ops->open(inode, file); |
| |
| if (retval == 0) { |
| |
| /* If the open() succeeded, then ieee1394 will be left |
| with an extra module reference, so we discard it here. |
| |
| The task-specific driver still has the extra |
| reference given to it by ieee1394_get_chardev(). |
| This extra reference prevents the module from |
| unloading while the file is open, and will be |
| dropped by the VFS when the file is released. |
| */ |
| |
| if (THIS_MODULE) |
| __MOD_DEC_USE_COUNT((struct module*) THIS_MODULE); |
| |
| /* note that if ieee1394 is compiled into the kernel, |
| THIS_MODULE will be (void*) NULL, hence the if and |
| the cast are necessary */ |
| |
| } else { |
| |
| /* if the open() failed, then we need to drop the |
| extra reference we gave to the task-specific |
| driver */ |
| |
| if (module) |
| __MOD_DEC_USE_COUNT(module); |
| |
| /* point the file's f_ops back to ieee1394. The VFS will then |
| decrement ieee1394's reference count immediately after this |
| function returns. */ |
| |
| file->f_op = &ieee1394_chardev_ops; |
| } |
| |
| return retval; |
| } |
| |
| struct proc_dir_entry *ieee1394_procfs_entry; |
| |
| static int __init ieee1394_init(void) |
| { |
| hpsb_packet_cache = kmem_cache_create("hpsb_packet", sizeof(struct hpsb_packet), |
| 0, 0, NULL, NULL); |
| |
| ieee1394_devfs_handle = devfs_mk_dir(NULL, "ieee1394", NULL); |
| |
| if (register_chrdev(IEEE1394_MAJOR, "ieee1394", &ieee1394_chardev_ops)) { |
| HPSB_ERR("unable to register character device major %d!\n", IEEE1394_MAJOR); |
| devfs_unregister(ieee1394_devfs_handle); |
| return -ENODEV; |
| } |
| |
| #ifdef CONFIG_PROC_FS |
| /* Must be done before we start everything else, since the drivers |
| * may use it. */ |
| ieee1394_procfs_entry = proc_mkdir("ieee1394", proc_bus); |
| if (ieee1394_procfs_entry == NULL) { |
| HPSB_ERR("unable to create /proc/bus/ieee1394\n"); |
| unregister_chrdev(IEEE1394_MAJOR, "ieee1394"); |
| devfs_unregister(ieee1394_devfs_handle); |
| return -ENOMEM; |
| } |
| ieee1394_procfs_entry->owner = THIS_MODULE; |
| #endif |
| |
| init_hpsb_highlevel(); |
| init_csr(); |
| if (!disable_nodemgr) |
| init_ieee1394_nodemgr(); |
| else |
| HPSB_INFO("nodemgr functionality disabled"); |
| |
| return 0; |
| } |
| |
| static void __exit ieee1394_cleanup(void) |
| { |
| if (!disable_nodemgr) |
| cleanup_ieee1394_nodemgr(); |
| |
| cleanup_csr(); |
| kmem_cache_destroy(hpsb_packet_cache); |
| |
| unregister_chrdev(IEEE1394_MAJOR, "ieee1394"); |
| |
| /* it's ok to pass a NULL devfs_handle to devfs_unregister */ |
| devfs_unregister(ieee1394_devfs_handle); |
| |
| remove_proc_entry("ieee1394", proc_bus); |
| } |
| |
| module_init(ieee1394_init); |
| module_exit(ieee1394_cleanup); |
| |
| /* Exported symbols */ |
| |
| /** hosts.c **/ |
| EXPORT_SYMBOL(hpsb_alloc_host); |
| EXPORT_SYMBOL(hpsb_add_host); |
| EXPORT_SYMBOL(hpsb_remove_host); |
| EXPORT_SYMBOL(hpsb_ref_host); |
| EXPORT_SYMBOL(hpsb_unref_host); |
| |
| /** ieee1394_core.c **/ |
| EXPORT_SYMBOL(hpsb_speedto_str); |
| EXPORT_SYMBOL(hpsb_set_packet_complete_task); |
| EXPORT_SYMBOL(alloc_hpsb_packet); |
| EXPORT_SYMBOL(free_hpsb_packet); |
| EXPORT_SYMBOL(hpsb_send_phy_config); |
| EXPORT_SYMBOL(hpsb_send_packet); |
| EXPORT_SYMBOL(hpsb_reset_bus); |
| EXPORT_SYMBOL(hpsb_bus_reset); |
| EXPORT_SYMBOL(hpsb_selfid_received); |
| EXPORT_SYMBOL(hpsb_selfid_complete); |
| EXPORT_SYMBOL(hpsb_packet_sent); |
| EXPORT_SYMBOL(hpsb_packet_received); |
| EXPORT_SYMBOL(ieee1394_register_chardev); |
| EXPORT_SYMBOL(ieee1394_unregister_chardev); |
| EXPORT_SYMBOL(ieee1394_devfs_handle); |
| EXPORT_SYMBOL(ieee1394_procfs_entry); |
| |
| /** ieee1394_transactions.c **/ |
| EXPORT_SYMBOL(hpsb_get_tlabel); |
| EXPORT_SYMBOL(hpsb_free_tlabel); |
| EXPORT_SYMBOL(hpsb_make_readpacket); |
| EXPORT_SYMBOL(hpsb_make_writepacket); |
| EXPORT_SYMBOL(hpsb_make_streampacket); |
| EXPORT_SYMBOL(hpsb_make_lockpacket); |
| EXPORT_SYMBOL(hpsb_make_lock64packet); |
| EXPORT_SYMBOL(hpsb_make_phypacket); |
| EXPORT_SYMBOL(hpsb_make_isopacket); |
| EXPORT_SYMBOL(hpsb_read); |
| EXPORT_SYMBOL(hpsb_write); |
| EXPORT_SYMBOL(hpsb_lock); |
| EXPORT_SYMBOL(hpsb_lock64); |
| EXPORT_SYMBOL(hpsb_send_gasp); |
| EXPORT_SYMBOL(hpsb_packet_success); |
| |
| /** highlevel.c **/ |
| EXPORT_SYMBOL(hpsb_register_highlevel); |
| EXPORT_SYMBOL(hpsb_unregister_highlevel); |
| EXPORT_SYMBOL(hpsb_register_addrspace); |
| EXPORT_SYMBOL(hpsb_unregister_addrspace); |
| EXPORT_SYMBOL(hpsb_listen_channel); |
| EXPORT_SYMBOL(hpsb_unlisten_channel); |
| EXPORT_SYMBOL(hpsb_get_hostinfo); |
| EXPORT_SYMBOL(hpsb_get_host_bykey); |
| EXPORT_SYMBOL(hpsb_create_hostinfo); |
| EXPORT_SYMBOL(hpsb_destroy_hostinfo); |
| EXPORT_SYMBOL(hpsb_set_hostinfo_key); |
| EXPORT_SYMBOL(hpsb_get_hostinfo_key); |
| EXPORT_SYMBOL(hpsb_get_hostinfo_bykey); |
| EXPORT_SYMBOL(hpsb_set_hostinfo); |
| EXPORT_SYMBOL(highlevel_read); |
| EXPORT_SYMBOL(highlevel_write); |
| EXPORT_SYMBOL(highlevel_lock); |
| EXPORT_SYMBOL(highlevel_lock64); |
| EXPORT_SYMBOL(highlevel_add_host); |
| EXPORT_SYMBOL(highlevel_remove_host); |
| EXPORT_SYMBOL(highlevel_host_reset); |
| |
| /** nodemgr.c **/ |
| EXPORT_SYMBOL(hpsb_guid_get_entry); |
| EXPORT_SYMBOL(hpsb_nodeid_get_entry); |
| EXPORT_SYMBOL(hpsb_node_fill_packet); |
| EXPORT_SYMBOL(hpsb_node_read); |
| EXPORT_SYMBOL(hpsb_node_write); |
| EXPORT_SYMBOL(hpsb_node_lock); |
| EXPORT_SYMBOL(hpsb_register_protocol); |
| EXPORT_SYMBOL(hpsb_unregister_protocol); |
| EXPORT_SYMBOL(hpsb_release_unit_directory); |
| |
| /** csr.c **/ |
| EXPORT_SYMBOL(hpsb_update_config_rom); |
| EXPORT_SYMBOL(hpsb_get_config_rom); |
| |
| /** dma.c **/ |
| EXPORT_SYMBOL(dma_prog_region_init); |
| EXPORT_SYMBOL(dma_prog_region_alloc); |
| EXPORT_SYMBOL(dma_prog_region_free); |
| EXPORT_SYMBOL(dma_region_init); |
| EXPORT_SYMBOL(dma_region_alloc); |
| EXPORT_SYMBOL(dma_region_free); |
| EXPORT_SYMBOL(dma_region_sync); |
| EXPORT_SYMBOL(dma_region_mmap); |
| EXPORT_SYMBOL(dma_region_offset_to_bus); |
| |
| /** iso.c **/ |
| EXPORT_SYMBOL(hpsb_iso_xmit_init); |
| EXPORT_SYMBOL(hpsb_iso_recv_init); |
| EXPORT_SYMBOL(hpsb_iso_xmit_start); |
| EXPORT_SYMBOL(hpsb_iso_recv_start); |
| EXPORT_SYMBOL(hpsb_iso_recv_listen_channel); |
| EXPORT_SYMBOL(hpsb_iso_recv_unlisten_channel); |
| EXPORT_SYMBOL(hpsb_iso_recv_set_channel_mask); |
| EXPORT_SYMBOL(hpsb_iso_stop); |
| EXPORT_SYMBOL(hpsb_iso_shutdown); |
| EXPORT_SYMBOL(hpsb_iso_xmit_queue_packet); |
| EXPORT_SYMBOL(hpsb_iso_xmit_sync); |
| EXPORT_SYMBOL(hpsb_iso_recv_release_packets); |
| EXPORT_SYMBOL(hpsb_iso_n_ready); |
| EXPORT_SYMBOL(hpsb_iso_packet_sent); |
| EXPORT_SYMBOL(hpsb_iso_packet_received); |
| EXPORT_SYMBOL(hpsb_iso_wake); |
| EXPORT_SYMBOL(hpsb_iso_recv_flush); |