diff options
Diffstat (limited to 'drivers/ieee1394/ieee1394_core.c')
| -rw-r--r-- | drivers/ieee1394/ieee1394_core.c | 1330 |
1 files changed, 1330 insertions, 0 deletions
diff --git a/drivers/ieee1394/ieee1394_core.c b/drivers/ieee1394/ieee1394_core.c new file mode 100644 index 00000000000..1c5845f7e4a --- /dev/null +++ b/drivers/ieee1394/ieee1394_core.c @@ -0,0 +1,1330 @@ +/* + * 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/moduleparam.h> +#include <linux/bitops.h> +#include <linux/kdev_t.h> +#include <linux/skbuff.h> +#include <linux/suspend.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" +#include "config_roms.h" + +/* + * Disable the nodemgr detection and config rom reading functionality. + */ +static int disable_nodemgr = 0; +module_param(disable_nodemgr, int, 0444); +MODULE_PARM_DESC(disable_nodemgr, "Disable nodemgr functionality."); + +/* Disable Isochronous Resource Manager functionality */ +int hpsb_disable_irm = 0; +module_param_named(disable_irm, hpsb_disable_irm, bool, 0); +MODULE_PARM_DESC(disable_irm, + "Disable Isochronous Resource Manager functionality."); + +/* We are GPL, so treat us special */ +MODULE_LICENSE("GPL"); + +/* Some globals used */ +const char *hpsb_speedto_str[] = { "S100", "S200", "S400", "S800", "S1600", "S3200" }; +struct class_simple *hpsb_protocol_class; + +#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 abort_requests(struct hpsb_host *host); +static void queue_packet_complete(struct hpsb_packet *packet); + + +/** + * 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) +{ + WARN_ON(packet->complete_routine != NULL); + packet->complete_routine = routine; + packet->complete_data = data; + return; +} + +/** + * hpsb_alloc_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 *hpsb_alloc_packet(size_t data_size) +{ + struct hpsb_packet *packet = NULL; + struct sk_buff *skb; + + data_size = ((data_size + 3) & ~3); + + skb = alloc_skb(data_size + sizeof(*packet), GFP_ATOMIC); + if (skb == NULL) + return NULL; + + memset(skb->data, 0, data_size + sizeof(*packet)); + + packet = (struct hpsb_packet *)skb->data; + packet->skb = skb; + + packet->header = packet->embedded_header; + packet->state = hpsb_unused; + packet->generation = -1; + INIT_LIST_HEAD(&packet->driver_list); + atomic_set(&packet->refcnt, 1); + + if (data_size) { + packet->data = (quadlet_t *)(skb->data + sizeof(*packet)); + packet->data_size = data_size; + } + + return packet; +} + + +/** + * hpsb_free_packet - free packet and data associated with it + * @packet: packet to free (is NULL safe) + * + * This function will free packet->data and finally the packet itself. + */ +void hpsb_free_packet(struct hpsb_packet *packet) +{ + if (packet && atomic_dec_and_test(&packet->refcnt)) { + BUG_ON(!list_empty(&packet->driver_list)); + kfree_skb(packet->skb); + } +} + + +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; + + spin_lock_irqsave(&host->pending_packet_queue.lock, flags); + + packet->ack_code = ackcode; + + if (packet->no_waiter || packet->state == hpsb_complete) { + /* if packet->no_waiter, must not have a tlabel allocated */ + spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags); + hpsb_free_packet(packet); + return; + } + + atomic_dec(&packet->refcnt); /* drop HC's reference */ + /* here the packet must be on the host->pending_packet_queue */ + + if (ackcode != ACK_PENDING || !packet->expect_response) { + packet->state = hpsb_complete; + __skb_unlink(packet->skb, &host->pending_packet_queue); + spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags); + queue_packet_complete(packet); + return; + } + + packet->state = hpsb_pending; + packet->sendtime = jiffies; + + spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags); + + 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 = hpsb_alloc_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); + + retval = hpsb_send_packet_and_wait(packet); + hpsb_free_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: 0 on success, negative errno on failure. + */ +int hpsb_send_packet(struct hpsb_packet *packet) +{ + struct hpsb_host *host = packet->host; + + if (host->is_shutdown) + return -EINVAL; + if (host->in_bus_reset || + (packet->generation != get_hpsb_generation(host))) + return -EAGAIN; + + packet->state = hpsb_queued; + + /* This just seems silly to me */ + WARN_ON(packet->no_waiter && packet->expect_response); + + if (!packet->no_waiter || packet->expect_response) { + atomic_inc(&packet->refcnt); + packet->sendtime = jiffies; + skb_queue_tail(&host->pending_packet_queue, packet->skb); + } + + 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(size, GFP_ATOMIC); + if (!data) { + HPSB_ERR("unable to allocate memory for concatenating header and data"); + return -ENOMEM; + } + + memcpy(data, packet->header, packet->header_size); + + if (packet->data_size) + memcpy(((u8*)data) + packet->header_size, packet->data, packet->data_size); + + 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 0; + } + + 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)]; + } + +#ifdef CONFIG_IEEE1394_VERBOSEDEBUG + 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); + } +#endif + + return host->driver->transmit_packet(host, packet); +} + +/* We could just use complete() directly as the packet complete + * callback, but this is more typesafe, in the sense that we get a + * compiler error if the prototype for complete() changes. */ + +static void complete_packet(void *data) +{ + complete((struct completion *) data); +} + +int hpsb_send_packet_and_wait(struct hpsb_packet *packet) +{ + struct completion done; + int retval; + + init_completion(&done); + hpsb_set_packet_complete_task(packet, complete_packet, &done); + retval = hpsb_send_packet(packet); + if (retval == 0) + wait_for_completion(&done); + + return retval; +} + +static void send_packet_nocare(struct hpsb_packet *packet) +{ + if (hpsb_send_packet(packet) < 0) { + hpsb_free_packet(packet); + } +} + + +static void handle_packet_response(struct hpsb_host *host, int tcode, + quadlet_t *data, size_t size) +{ + struct hpsb_packet *packet = NULL; + struct sk_buff *skb; + int tcode_match = 0; + int tlabel; + unsigned long flags; + + tlabel = (data[0] >> 10) & 0x3f; + + spin_lock_irqsave(&host->pending_packet_queue.lock, flags); + + skb_queue_walk(&host->pending_packet_queue, skb) { + packet = (struct hpsb_packet *)skb->data; + if ((packet->tlabel == tlabel) + && (packet->node_id == (data[1] >> 16))){ + break; + } + + packet = NULL; + } + + if (packet == NULL) { + HPSB_DEBUG("unsolicited response packet received - no tlabel match"); + dump_packet("contents:", data, 16); + spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags); + return; + } + + switch (packet->tcode) { + case TCODE_WRITEQ: + case TCODE_WRITEB: + if (tcode != TCODE_WRITE_RESPONSE) + break; + tcode_match = 1; + memcpy(packet->header, data, 12); + break; + case TCODE_READQ: + if (tcode != TCODE_READQ_RESPONSE) + break; + tcode_match = 1; + memcpy(packet->header, data, 16); + break; + case TCODE_READB: + if (tcode != TCODE_READB_RESPONSE) + break; + tcode_match = 1; + BUG_ON(packet->skb->len - sizeof(*packet) < size - 16); + memcpy(packet->header, data, 16); + memcpy(packet->data, data + 4, size - 16); + break; + case TCODE_LOCK_REQUEST: + if (tcode != TCODE_LOCK_RESPONSE) + break; + tcode_match = 1; + size = min((size - 16), (size_t)8); + BUG_ON(packet->skb->len - sizeof(*packet) < size); + memcpy(packet->header, data, 16); + memcpy(packet->data, data + 4, size); + break; + } + + if (!tcode_match) { + spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags); + HPSB_INFO("unsolicited response packet received - tcode mismatch"); + dump_packet("contents:", data, 16); + return; + } + + __skb_unlink(skb, skb->list); + + if (packet->state == hpsb_queued) { + packet->sendtime = jiffies; + packet->ack_code = ACK_PENDING; + } + + packet->state = hpsb_complete; + spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags); + + queue_packet_complete(packet); +} + + +static struct hpsb_packet *create_reply_packet(struct hpsb_host *host, + quadlet_t *data, size_t dsize) +{ + struct hpsb_packet *p; + + p = hpsb_alloc_packet(dsize); + if (unlikely(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 { + hpsb_free_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 { + hpsb_free_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; + } +} + + +static void abort_requests(struct hpsb_host *host) +{ + struct hpsb_packet *packet; + struct sk_buff *skb; + + host->driver->devctl(host, CANCEL_REQUESTS, 0); + + while ((skb = skb_dequeue(&host->pending_packet_queue)) != NULL) { + packet = (struct hpsb_packet *)skb->data; + + packet->state = hpsb_complete; + packet->ack_code = ACKX_ABORTED; + queue_packet_complete(packet); + } +} + +void abort_timedouts(unsigned long __opaque) +{ + struct hpsb_host *host = (struct hpsb_host *)__opaque; + unsigned long flags; + struct hpsb_packet *packet; + struct sk_buff *skb; + unsigned long expire; + + spin_lock_irqsave(&host->csr.lock, flags); + expire = host->csr.expire; + spin_unlock_irqrestore(&host->csr.lock, flags); + + /* Hold the lock around this, since we aren't dequeuing all + * packets, just ones we need. */ + spin_lock_irqsave(&host->pending_packet_queue.lock, flags); + + while (!skb_queue_empty(&host->pending_packet_queue)) { + skb = skb_peek(&host->pending_packet_queue); + + packet = (struct hpsb_packet *)skb->data; + + if (time_before(packet->sendtime + expire, jiffies)) { + __skb_unlink(skb, skb->list); + packet->state = hpsb_complete; + packet->ack_code = ACKX_TIMEOUT; + queue_packet_complete(packet); + } else { + /* Since packets are added to the tail, the oldest + * ones are first, always. When we get to one that + * isn't timed out, the rest aren't either. */ + break; + } + } + + if (!skb_queue_empty(&host->pending_packet_queue)) + mod_timer(&host->timeout, jiffies + host->timeout_interval); + + spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags); +} + + +/* Kernel thread and vars, which handles packets that are completed. Only + * packets that have a "complete" function are sent here. This way, the + * completion is run out of kernel context, and doesn't block the rest of + * the stack. */ +static int khpsbpkt_pid = -1, khpsbpkt_kill; +static DECLARE_COMPLETION(khpsbpkt_complete); +static struct sk_buff_head hpsbpkt_queue; +static DECLARE_MUTEX_LOCKED(khpsbpkt_sig); + + +static void queue_packet_complete(struct hpsb_packet *packet) +{ + if (packet->no_waiter) { + hpsb_free_packet(packet); + return; + } + if (packet->complete_routine != NULL) { + skb_queue_tail(&hpsbpkt_queue, packet->skb); + + /* Signal the kernel thread to handle this */ + up(&khpsbpkt_sig); + } + return; +} + +static int hpsbpkt_thread(void *__hi) +{ + struct sk_buff *skb; + struct hpsb_packet *packet; + void (*complete_routine)(void*); + void *complete_data; + + daemonize("khpsbpkt"); + + while (1) { + if (down_interruptible(&khpsbpkt_sig)) { + if (current->flags & PF_FREEZE) { + refrigerator(0); + continue; + } + printk("khpsbpkt: received unexpected signal?!\n" ); + break; + } + + if (khpsbpkt_kill) + break; + + while ((skb = skb_dequeue(&hpsbpkt_queue)) != NULL) { + packet = (struct hpsb_packet *)skb->data; + + complete_routine = packet->complete_routine; + complete_data = packet->complete_data; + + packet->complete_routine = packet->complete_data = NULL; + + complete_routine(complete_data); + } + } + + complete_and_exit(&khpsbpkt_complete, 0); +} + +static int __init ieee1394_init(void) +{ + int i, ret; + + skb_queue_head_init(&hpsbpkt_queue); + + /* non-fatal error */ + if (hpsb_init_config_roms()) { + HPSB_ERR("Failed to initialize some config rom entries.\n"); + HPSB_ERR("Some features may not be available\n"); + } + + khpsbpkt_pid = kernel_thread(hpsbpkt_thread, NULL, CLONE_KERNEL); + if (khpsbpkt_pid < 0) { + HPSB_ERR("Failed to start hpsbpkt thread!\n"); + ret = -ENOMEM; + goto exit_cleanup_config_roms; + } + + if (register_chrdev_region(IEEE1394_CORE_DEV, 256, "ieee1394")) { + HPSB_ERR("unable to register character device major %d!\n", IEEE1394_MAJOR); + ret = -ENODEV; + goto exit_release_kernel_thread; + } + + /* actually this is a non-fatal error */ + ret = devfs_mk_dir("ieee1394"); + if (ret < 0) { + HPSB_ERR("unable to make devfs dir for device major %d!\n", IEEE1394_MAJOR); + goto release_chrdev; + } + + ret = bus_register(&ieee1394_bus_type); + if (ret < 0) { + HPSB_INFO("bus register failed"); + goto release_devfs; + } + + for (i = 0; fw_bus_attrs[i]; i++) { + ret = bus_create_file(&ieee1394_bus_type, fw_bus_attrs[i]); + if (ret < 0) { + while (i >= 0) { + bus_remove_file(&ieee1394_bus_type, + fw_bus_attrs[i--]); + } + bus_unregister(&ieee1394_bus_type); + goto release_devfs; + } + } + + ret = class_register(&hpsb_host_class); + if (ret < 0) + goto release_all_bus; + + hpsb_protocol_class = class_simple_create(THIS_MODULE, "ieee1394_protocol"); + if (IS_ERR(hpsb_protocol_class)) { + ret = PTR_ERR(hpsb_protocol_class); + goto release_class_host; + } + + ret = init_csr(); + if (ret) { + HPSB_INFO("init csr failed"); + ret = -ENOMEM; + goto release_class_protocol; + } + + if (disable_nodemgr) { + HPSB_INFO("nodemgr and IRM functionality disabled"); + /* We shouldn't contend for IRM with nodemgr disabled, since + nodemgr implements functionality required of ieee1394a-2000 + IRMs */ + hpsb_disable_irm = 1; + + return 0; + } + + if (hpsb_disable_irm) { + HPSB_INFO("IRM functionality disabled"); + } + + ret = init_ieee1394_nodemgr(); + if (ret < 0) { + HPSB_INFO("init nodemgr failed"); + goto cleanup_csr; + } + + return 0; + +cleanup_csr: + cleanup_csr(); +release_class_protocol: + class_simple_destroy(hpsb_protocol_class); +release_class_host: + class_unregister(&hpsb_host_class); +release_all_bus: + for (i = 0; fw_bus_attrs[i]; i++) + bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]); + bus_unregister(&ieee1394_bus_type); +release_devfs: + devfs_remove("ieee1394"); +release_chrdev: + unregister_chrdev_region(IEEE1394_CORE_DEV, 256); +exit_release_kernel_thread: + if (khpsbpkt_pid >= 0) { + kill_proc(khpsbpkt_pid, SIGTERM, 1); + wait_for_completion(&khpsbpkt_complete); + } +exit_cleanup_config_roms: + hpsb_cleanup_config_roms(); + return ret; +} + +static void __exit ieee1394_cleanup(void) +{ + int i; + + if (!disable_nodemgr) + cleanup_ieee1394_nodemgr(); + + cleanup_csr(); + + class_simple_destroy(hpsb_protocol_class); + class_unregister(&hpsb_host_class); + for (i = 0; fw_bus_attrs[i]; i++) + bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]); + bus_unregister(&ieee1394_bus_type); + + if (khpsbpkt_pid >= 0) { + khpsbpkt_kill = 1; + mb(); + up(&khpsbpkt_sig); + wait_for_completion(&khpsbpkt_complete); + } + + hpsb_cleanup_config_roms(); + + unregister_chrdev_region(IEEE1394_CORE_DEV, 256); + devfs_remove("ieee1394"); +} + +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_update_config_rom_image); + +/** ieee1394_core.c **/ +EXPORT_SYMBOL(hpsb_speedto_str); +EXPORT_SYMBOL(hpsb_protocol_class); +EXPORT_SYMBOL(hpsb_set_packet_complete_task); +EXPORT_SYMBOL(hpsb_alloc_packet); +EXPORT_SYMBOL(hpsb_free_packet); +EXPORT_SYMBOL(hpsb_send_phy_config); +EXPORT_SYMBOL(hpsb_send_packet); +EXPORT_SYMBOL(hpsb_send_packet_and_wait); +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_GPL(hpsb_disable_irm); + +/** 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_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_allocate_and_register_addrspace); +EXPORT_SYMBOL(hpsb_listen_channel); +EXPORT_SYMBOL(hpsb_unlisten_channel); +EXPORT_SYMBOL(hpsb_get_hostinfo); +EXPORT_SYMBOL(hpsb_create_hostinfo); +EXPORT_SYMBOL(hpsb_destroy_hostinfo); +EXPORT_SYMBOL(hpsb_set_hostinfo_key); +EXPORT_SYMBOL(hpsb_get_hostinfo_bykey); +EXPORT_SYMBOL(hpsb_set_hostinfo); +EXPORT_SYMBOL(highlevel_add_host); +EXPORT_SYMBOL(highlevel_remove_host); +EXPORT_SYMBOL(highlevel_host_reset); + +/** nodemgr.c **/ +EXPORT_SYMBOL(hpsb_node_fill_packet); +EXPORT_SYMBOL(hpsb_node_write); +EXPORT_SYMBOL(hpsb_register_protocol); +EXPORT_SYMBOL(hpsb_unregister_protocol); +EXPORT_SYMBOL(ieee1394_bus_type); +EXPORT_SYMBOL(nodemgr_for_each_host); + +/** csr.c **/ +EXPORT_SYMBOL(hpsb_update_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_for_cpu); +EXPORT_SYMBOL(dma_region_sync_for_device); +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); + +/** csr1212.c **/ +EXPORT_SYMBOL(csr1212_create_csr); +EXPORT_SYMBOL(csr1212_init_local_csr); +EXPORT_SYMBOL(csr1212_new_immediate); +EXPORT_SYMBOL(csr1212_new_directory); +EXPORT_SYMBOL(csr1212_associate_keyval); +EXPORT_SYMBOL(csr1212_attach_keyval_to_directory); +EXPORT_SYMBOL(csr1212_new_string_descriptor_leaf); +EXPORT_SYMBOL(csr1212_detach_keyval_from_directory); +EXPORT_SYMBOL(csr1212_release_keyval); +EXPORT_SYMBOL(csr1212_destroy_csr); +EXPORT_SYMBOL(csr1212_read); +EXPORT_SYMBOL(csr1212_generate_csr_image); +EXPORT_SYMBOL(csr1212_parse_keyval); +EXPORT_SYMBOL(csr1212_parse_csr); +EXPORT_SYMBOL(_csr1212_read_keyval); +EXPORT_SYMBOL(_csr1212_destroy_keyval); |