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![Jörn Engel](/assets/img/avatar_default.png)
Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
1298 lines
34 KiB
C
1298 lines
34 KiB
C
/*
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* IEEE 1394 for Linux
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*
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* Core support: hpsb_packet management, packet handling and forwarding to
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* highlevel or lowlevel code
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*
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* Copyright (C) 1999, 2000 Andreas E. Bombe
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* 2002 Manfred Weihs <weihs@ict.tuwien.ac.at>
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*
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* This code is licensed under the GPL. See the file COPYING in the root
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* directory of the kernel sources for details.
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*
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*
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* Contributions:
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*
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* Manfred Weihs <weihs@ict.tuwien.ac.at>
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* loopback functionality in hpsb_send_packet
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* allow highlevel drivers to disable automatic response generation
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* and to generate responses themselves (deferred)
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*
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*/
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/bitops.h>
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#include <linux/kdev_t.h>
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#include <linux/skbuff.h>
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#include <linux/suspend.h>
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#include <linux/kthread.h>
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#include <asm/byteorder.h>
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#include <asm/semaphore.h>
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#include "ieee1394_types.h"
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#include "ieee1394.h"
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#include "hosts.h"
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#include "ieee1394_core.h"
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#include "highlevel.h"
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#include "ieee1394_transactions.h"
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#include "csr.h"
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#include "nodemgr.h"
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#include "dma.h"
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#include "iso.h"
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#include "config_roms.h"
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/*
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* Disable the nodemgr detection and config rom reading functionality.
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*/
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static int disable_nodemgr;
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module_param(disable_nodemgr, int, 0444);
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MODULE_PARM_DESC(disable_nodemgr, "Disable nodemgr functionality.");
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/* Disable Isochronous Resource Manager functionality */
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int hpsb_disable_irm = 0;
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module_param_named(disable_irm, hpsb_disable_irm, bool, 0444);
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MODULE_PARM_DESC(disable_irm,
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"Disable Isochronous Resource Manager functionality.");
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/* We are GPL, so treat us special */
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MODULE_LICENSE("GPL");
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/* Some globals used */
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const char *hpsb_speedto_str[] = { "S100", "S200", "S400", "S800", "S1600", "S3200" };
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struct class *hpsb_protocol_class;
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#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
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static void dump_packet(const char *text, quadlet_t *data, int size, int speed)
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{
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int i;
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size /= 4;
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size = (size > 4 ? 4 : size);
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printk(KERN_DEBUG "ieee1394: %s", text);
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if (speed > -1 && speed < 6)
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printk(" at %s", hpsb_speedto_str[speed]);
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printk(":");
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for (i = 0; i < size; i++)
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printk(" %08x", data[i]);
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printk("\n");
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}
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#else
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#define dump_packet(a,b,c,d)
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#endif
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static void abort_requests(struct hpsb_host *host);
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static void queue_packet_complete(struct hpsb_packet *packet);
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/**
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* hpsb_set_packet_complete_task - set the task that runs when a packet
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* completes. You cannot call this more than once on a single packet
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* before it is sent.
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*
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* @packet: the packet whose completion we want the task added to
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* @routine: function to call
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* @data: data (if any) to pass to the above function
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*/
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void hpsb_set_packet_complete_task(struct hpsb_packet *packet,
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void (*routine)(void *), void *data)
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{
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WARN_ON(packet->complete_routine != NULL);
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packet->complete_routine = routine;
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packet->complete_data = data;
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return;
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}
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/**
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* hpsb_alloc_packet - allocate new packet structure
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* @data_size: size of the data block to be allocated
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*
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* This function allocates, initializes and returns a new &struct hpsb_packet.
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* It can be used in interrupt context. A header block is always included, its
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* size is big enough to contain all possible 1394 headers. The data block is
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* only allocated when @data_size is not zero.
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*
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* For packets for which responses will be received the @data_size has to be big
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* enough to contain the response's data block since no further allocation
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* occurs at response matching time.
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*
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* The packet's generation value will be set to the current generation number
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* for ease of use. Remember to overwrite it with your own recorded generation
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* number if you can not be sure that your code will not race with a bus reset.
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*
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* Return value: A pointer to a &struct hpsb_packet or NULL on allocation
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* failure.
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*/
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struct hpsb_packet *hpsb_alloc_packet(size_t data_size)
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{
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struct hpsb_packet *packet = NULL;
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struct sk_buff *skb;
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data_size = ((data_size + 3) & ~3);
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skb = alloc_skb(data_size + sizeof(*packet), GFP_ATOMIC);
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if (skb == NULL)
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return NULL;
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memset(skb->data, 0, data_size + sizeof(*packet));
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packet = (struct hpsb_packet *)skb->data;
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packet->skb = skb;
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packet->header = packet->embedded_header;
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packet->state = hpsb_unused;
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packet->generation = -1;
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INIT_LIST_HEAD(&packet->driver_list);
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atomic_set(&packet->refcnt, 1);
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if (data_size) {
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packet->data = (quadlet_t *)(skb->data + sizeof(*packet));
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packet->data_size = data_size;
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}
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return packet;
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}
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/**
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* hpsb_free_packet - free packet and data associated with it
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* @packet: packet to free (is NULL safe)
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*
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* This function will free packet->data and finally the packet itself.
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*/
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void hpsb_free_packet(struct hpsb_packet *packet)
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{
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if (packet && atomic_dec_and_test(&packet->refcnt)) {
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BUG_ON(!list_empty(&packet->driver_list));
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kfree_skb(packet->skb);
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}
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}
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int hpsb_reset_bus(struct hpsb_host *host, int type)
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{
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if (!host->in_bus_reset) {
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host->driver->devctl(host, RESET_BUS, type);
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return 0;
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} else {
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return 1;
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}
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}
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int hpsb_bus_reset(struct hpsb_host *host)
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{
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if (host->in_bus_reset) {
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HPSB_NOTICE("%s called while bus reset already in progress",
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__FUNCTION__);
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return 1;
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}
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abort_requests(host);
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host->in_bus_reset = 1;
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host->irm_id = -1;
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host->is_irm = 0;
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host->busmgr_id = -1;
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host->is_busmgr = 0;
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host->is_cycmst = 0;
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host->node_count = 0;
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host->selfid_count = 0;
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return 0;
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}
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/*
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* Verify num_of_selfids SelfIDs and return number of nodes. Return zero in
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* case verification failed.
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*/
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static int check_selfids(struct hpsb_host *host)
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{
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int nodeid = -1;
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int rest_of_selfids = host->selfid_count;
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struct selfid *sid = (struct selfid *)host->topology_map;
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struct ext_selfid *esid;
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int esid_seq = 23;
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host->nodes_active = 0;
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while (rest_of_selfids--) {
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if (!sid->extended) {
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nodeid++;
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esid_seq = 0;
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if (sid->phy_id != nodeid) {
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HPSB_INFO("SelfIDs failed monotony check with "
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"%d", sid->phy_id);
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return 0;
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}
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if (sid->link_active) {
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host->nodes_active++;
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if (sid->contender)
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host->irm_id = LOCAL_BUS | sid->phy_id;
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}
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} else {
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esid = (struct ext_selfid *)sid;
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if ((esid->phy_id != nodeid)
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|| (esid->seq_nr != esid_seq)) {
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HPSB_INFO("SelfIDs failed monotony check with "
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"%d/%d", esid->phy_id, esid->seq_nr);
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return 0;
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}
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esid_seq++;
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}
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sid++;
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}
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esid = (struct ext_selfid *)(sid - 1);
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while (esid->extended) {
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if ((esid->porta == SELFID_PORT_PARENT) ||
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(esid->portb == SELFID_PORT_PARENT) ||
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(esid->portc == SELFID_PORT_PARENT) ||
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(esid->portd == SELFID_PORT_PARENT) ||
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(esid->porte == SELFID_PORT_PARENT) ||
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(esid->portf == SELFID_PORT_PARENT) ||
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(esid->portg == SELFID_PORT_PARENT) ||
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(esid->porth == SELFID_PORT_PARENT)) {
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HPSB_INFO("SelfIDs failed root check on "
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"extended SelfID");
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return 0;
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}
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esid--;
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}
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sid = (struct selfid *)esid;
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if ((sid->port0 == SELFID_PORT_PARENT) ||
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(sid->port1 == SELFID_PORT_PARENT) ||
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(sid->port2 == SELFID_PORT_PARENT)) {
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HPSB_INFO("SelfIDs failed root check");
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return 0;
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}
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host->node_count = nodeid + 1;
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return 1;
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}
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static void build_speed_map(struct hpsb_host *host, int nodecount)
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{
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u8 cldcnt[nodecount];
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u8 *map = host->speed_map;
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u8 *speedcap = host->speed;
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struct selfid *sid;
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struct ext_selfid *esid;
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int i, j, n;
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for (i = 0; i < (nodecount * 64); i += 64) {
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for (j = 0; j < nodecount; j++) {
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map[i+j] = IEEE1394_SPEED_MAX;
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}
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}
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for (i = 0; i < nodecount; i++) {
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cldcnt[i] = 0;
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}
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/* find direct children count and speed */
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for (sid = (struct selfid *)&host->topology_map[host->selfid_count-1],
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n = nodecount - 1;
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(void *)sid >= (void *)host->topology_map; sid--) {
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if (sid->extended) {
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esid = (struct ext_selfid *)sid;
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if (esid->porta == SELFID_PORT_CHILD) cldcnt[n]++;
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if (esid->portb == SELFID_PORT_CHILD) cldcnt[n]++;
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if (esid->portc == SELFID_PORT_CHILD) cldcnt[n]++;
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if (esid->portd == SELFID_PORT_CHILD) cldcnt[n]++;
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if (esid->porte == SELFID_PORT_CHILD) cldcnt[n]++;
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if (esid->portf == SELFID_PORT_CHILD) cldcnt[n]++;
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if (esid->portg == SELFID_PORT_CHILD) cldcnt[n]++;
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if (esid->porth == SELFID_PORT_CHILD) cldcnt[n]++;
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} else {
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if (sid->port0 == SELFID_PORT_CHILD) cldcnt[n]++;
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if (sid->port1 == SELFID_PORT_CHILD) cldcnt[n]++;
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if (sid->port2 == SELFID_PORT_CHILD) cldcnt[n]++;
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speedcap[n] = sid->speed;
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n--;
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}
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}
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/* set self mapping */
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for (i = 0; i < nodecount; i++) {
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map[64*i + i] = speedcap[i];
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}
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/* fix up direct children count to total children count;
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* also fix up speedcaps for sibling and parent communication */
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for (i = 1; i < nodecount; i++) {
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for (j = cldcnt[i], n = i - 1; j > 0; j--) {
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cldcnt[i] += cldcnt[n];
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speedcap[n] = min(speedcap[n], speedcap[i]);
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n -= cldcnt[n] + 1;
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}
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}
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for (n = 0; n < nodecount; n++) {
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for (i = n - cldcnt[n]; i <= n; i++) {
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for (j = 0; j < (n - cldcnt[n]); j++) {
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map[j*64 + i] = map[i*64 + j] =
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min(map[i*64 + j], speedcap[n]);
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}
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for (j = n + 1; j < nodecount; j++) {
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map[j*64 + i] = map[i*64 + j] =
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min(map[i*64 + j], speedcap[n]);
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}
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}
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}
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/* assume maximum speed for 1394b PHYs, nodemgr will correct it */
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for (n = 0; n < nodecount; n++)
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if (speedcap[n] == 3)
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speedcap[n] = IEEE1394_SPEED_MAX;
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}
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void hpsb_selfid_received(struct hpsb_host *host, quadlet_t sid)
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{
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if (host->in_bus_reset) {
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HPSB_VERBOSE("Including SelfID 0x%x", sid);
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host->topology_map[host->selfid_count++] = sid;
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} else {
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HPSB_NOTICE("Spurious SelfID packet (0x%08x) received from bus %d",
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sid, NODEID_TO_BUS(host->node_id));
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}
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}
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void hpsb_selfid_complete(struct hpsb_host *host, int phyid, int isroot)
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{
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if (!host->in_bus_reset)
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HPSB_NOTICE("SelfID completion called outside of bus reset!");
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host->node_id = LOCAL_BUS | phyid;
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host->is_root = isroot;
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if (!check_selfids(host)) {
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if (host->reset_retries++ < 20) {
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/* selfid stage did not complete without error */
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HPSB_NOTICE("Error in SelfID stage, resetting");
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host->in_bus_reset = 0;
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/* this should work from ohci1394 now... */
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hpsb_reset_bus(host, LONG_RESET);
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return;
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} else {
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HPSB_NOTICE("Stopping out-of-control reset loop");
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HPSB_NOTICE("Warning - topology map and speed map will not be valid");
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host->reset_retries = 0;
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}
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} else {
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host->reset_retries = 0;
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build_speed_map(host, host->node_count);
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}
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HPSB_VERBOSE("selfid_complete called with successful SelfID stage "
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"... irm_id: 0x%X node_id: 0x%X",host->irm_id,host->node_id);
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/* irm_id is kept up to date by check_selfids() */
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if (host->irm_id == host->node_id) {
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host->is_irm = 1;
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} else {
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host->is_busmgr = 0;
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host->is_irm = 0;
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}
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if (isroot) {
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host->driver->devctl(host, ACT_CYCLE_MASTER, 1);
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host->is_cycmst = 1;
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}
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atomic_inc(&host->generation);
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host->in_bus_reset = 0;
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highlevel_host_reset(host);
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}
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void hpsb_packet_sent(struct hpsb_host *host, struct hpsb_packet *packet,
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int ackcode)
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{
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unsigned long flags;
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spin_lock_irqsave(&host->pending_packet_queue.lock, flags);
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packet->ack_code = ackcode;
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if (packet->no_waiter || packet->state == hpsb_complete) {
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/* if packet->no_waiter, must not have a tlabel allocated */
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spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
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hpsb_free_packet(packet);
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return;
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}
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atomic_dec(&packet->refcnt); /* drop HC's reference */
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/* here the packet must be on the host->pending_packet_queue */
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if (ackcode != ACK_PENDING || !packet->expect_response) {
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packet->state = hpsb_complete;
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__skb_unlink(packet->skb, &host->pending_packet_queue);
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spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
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queue_packet_complete(packet);
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return;
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}
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packet->state = hpsb_pending;
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packet->sendtime = jiffies;
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spin_unlock_irqrestore(&host->pending_packet_queue.lock, flags);
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mod_timer(&host->timeout, jiffies + host->timeout_interval);
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}
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/**
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* hpsb_send_phy_config - transmit a PHY configuration packet on the bus
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* @host: host that PHY config packet gets sent through
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* @rootid: root whose force_root bit should get set (-1 = don't set force_root)
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* @gapcnt: gap count value to set (-1 = don't set gap count)
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*
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* This function sends a PHY config packet on the bus through the specified host.
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*
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* Return value: 0 for success or error number otherwise.
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*/
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int hpsb_send_phy_config(struct hpsb_host *host, int rootid, int gapcnt)
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{
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struct hpsb_packet *packet;
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quadlet_t d = 0;
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int retval = 0;
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if (rootid >= ALL_NODES || rootid < -1 || gapcnt > 0x3f || gapcnt < -1 ||
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(rootid == -1 && gapcnt == -1)) {
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HPSB_DEBUG("Invalid Parameter: rootid = %d gapcnt = %d",
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rootid, gapcnt);
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return -EINVAL;
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}
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if (rootid != -1)
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d |= PHYPACKET_PHYCONFIG_R | rootid << PHYPACKET_PORT_SHIFT;
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if (gapcnt != -1)
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d |= PHYPACKET_PHYCONFIG_T | gapcnt << PHYPACKET_GAPCOUNT_SHIFT;
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packet = hpsb_make_phypacket(host, d);
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if (!packet)
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return -ENOMEM;
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|
|
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);
|
|
/* Set the initial "sendtime" to 10 seconds from now, to
|
|
prevent premature expiry. If a packet takes more than
|
|
10 seconds to hit the wire, we have bigger problems :) */
|
|
packet->sendtime = jiffies + 10 * HZ;
|
|
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, -1);
|
|
|
|
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 &&
|
|
NODEID_TO_NODE(packet->node_id) != ALL_NODES)
|
|
packet->speed_code =
|
|
host->speed[NODEID_TO_NODE(packet->node_id)];
|
|
|
|
dump_packet("send packet", packet->header, packet->header_size, packet->speed_code);
|
|
|
|
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, -1);
|
|
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, -1);
|
|
return;
|
|
}
|
|
|
|
__skb_unlink(skb, &host->pending_packet_queue);
|
|
|
|
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, -1);
|
|
|
|
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, &host->pending_packet_queue);
|
|
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 struct task_struct *khpsbpkt_thread;
|
|
static struct sk_buff_head hpsbpkt_queue;
|
|
|
|
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);
|
|
wake_up_process(khpsbpkt_thread);
|
|
}
|
|
return;
|
|
}
|
|
|
|
static int hpsbpkt_thread(void *__hi)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct hpsb_packet *packet;
|
|
void (*complete_routine)(void*);
|
|
void *complete_data;
|
|
|
|
current->flags |= PF_NOFREEZE;
|
|
|
|
while (!kthread_should_stop()) {
|
|
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);
|
|
}
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
if (!skb_peek(&hpsbpkt_queue))
|
|
schedule();
|
|
__set_current_state(TASK_RUNNING);
|
|
}
|
|
return 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_thread = kthread_run(hpsbpkt_thread, NULL, "khpsbpkt");
|
|
if (IS_ERR(khpsbpkt_thread)) {
|
|
HPSB_ERR("Failed to start hpsbpkt thread!\n");
|
|
ret = PTR_ERR(khpsbpkt_thread);
|
|
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;
|
|
}
|
|
|
|
ret = bus_register(&ieee1394_bus_type);
|
|
if (ret < 0) {
|
|
HPSB_INFO("bus register failed");
|
|
goto release_chrdev;
|
|
}
|
|
|
|
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_chrdev;
|
|
}
|
|
}
|
|
|
|
ret = class_register(&hpsb_host_class);
|
|
if (ret < 0)
|
|
goto release_all_bus;
|
|
|
|
hpsb_protocol_class = class_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_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_chrdev:
|
|
unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
|
|
exit_release_kernel_thread:
|
|
kthread_stop(khpsbpkt_thread);
|
|
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_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);
|
|
|
|
kthread_stop(khpsbpkt_thread);
|
|
|
|
hpsb_cleanup_config_roms();
|
|
|
|
unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
|
|
}
|
|
|
|
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_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_GPL(hpsb_disable_irm);
|
|
#ifdef CONFIG_IEEE1394_EXPORT_FULL_API
|
|
EXPORT_SYMBOL(hpsb_send_phy_config);
|
|
EXPORT_SYMBOL(hpsb_send_packet_and_wait);
|
|
#endif
|
|
|
|
/** 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_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_host_reset);
|
|
#ifdef CONFIG_IEEE1394_EXPORT_FULL_API
|
|
EXPORT_SYMBOL(highlevel_add_host);
|
|
EXPORT_SYMBOL(highlevel_remove_host);
|
|
#endif
|
|
|
|
/** 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);
|
|
#ifdef CONFIG_IEEE1394_EXPORT_FULL_API
|
|
EXPORT_SYMBOL(nodemgr_for_each_host);
|
|
#endif
|
|
|
|
/** 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_new_directory);
|
|
EXPORT_SYMBOL(csr1212_attach_keyval_to_directory);
|
|
EXPORT_SYMBOL(csr1212_detach_keyval_from_directory);
|
|
EXPORT_SYMBOL(csr1212_release_keyval);
|
|
EXPORT_SYMBOL(csr1212_read);
|
|
EXPORT_SYMBOL(csr1212_parse_keyval);
|
|
EXPORT_SYMBOL(_csr1212_read_keyval);
|
|
EXPORT_SYMBOL(_csr1212_destroy_keyval);
|
|
#ifdef CONFIG_IEEE1394_EXPORT_FULL_API
|
|
EXPORT_SYMBOL(csr1212_create_csr);
|
|
EXPORT_SYMBOL(csr1212_init_local_csr);
|
|
EXPORT_SYMBOL(csr1212_new_immediate);
|
|
EXPORT_SYMBOL(csr1212_associate_keyval);
|
|
EXPORT_SYMBOL(csr1212_new_string_descriptor_leaf);
|
|
EXPORT_SYMBOL(csr1212_destroy_csr);
|
|
EXPORT_SYMBOL(csr1212_generate_csr_image);
|
|
EXPORT_SYMBOL(csr1212_parse_csr);
|
|
#endif
|