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Subject[PATCH 1/2] Import fw-core driver.
Date
Pull in the core stack and build system changes.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
---

drivers/Kconfig | 2
drivers/Makefile | 1
drivers/fw/Kconfig | 23 +
drivers/fw/Makefile | 7
drivers/fw/fw-card.c | 410 +++++++++++++++++++++
drivers/fw/fw-iso.c | 136 +++++++
drivers/fw/fw-topology.c | 444 ++++++++++++++++++++++
drivers/fw/fw-topology.h | 131 +++++++
drivers/fw/fw-transaction.c | 856 +++++++++++++++++++++++++++++++++++++++++++
drivers/fw/fw-transaction.h | 415 +++++++++++++++++++++
10 files changed, 2425 insertions(+), 0 deletions(-)

diff --git a/drivers/Kconfig b/drivers/Kconfig
index f394634..cf39e45 100644
--- a/drivers/Kconfig
+++ b/drivers/Kconfig
@@ -30,6 +30,8 @@ source "drivers/md/Kconfig"

source "drivers/message/fusion/Kconfig"

+source "drivers/fw/Kconfig"
+
source "drivers/ieee1394/Kconfig"

source "drivers/message/i2o/Kconfig"
diff --git a/drivers/Makefile b/drivers/Makefile
index 4ac14da..43335ef 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_FC4) += fc4/
obj-$(CONFIG_SCSI) += scsi/
obj-$(CONFIG_ATA) += ata/
obj-$(CONFIG_FUSION) += message/
+obj-$(CONFIG_FW_CORE) += fw/
obj-$(CONFIG_IEEE1394) += ieee1394/
obj-y += cdrom/
obj-$(CONFIG_MTD) += mtd/
diff --git a/drivers/fw/Kconfig b/drivers/fw/Kconfig
new file mode 100644
index 0000000..f09ed59
--- /dev/null
+++ b/drivers/fw/Kconfig
@@ -0,0 +1,23 @@
+# -*- shell-script -*-
+
+menu "IEEE 1394 (FireWire) support (JUJU alternative stack)"
+
+config FW_CORE
+ tristate "IEEE 1394 (FireWire) support (JUJU alternative stack)"
+ help
+ IEEE 1394 describes a high performance serial bus, which is also
+ known as FireWire(tm) or i.Link(tm) and is used for connecting all
+ sorts of devices (most notably digital video cameras) to your
+ computer.
+
+ If you have FireWire hardware and want to use it, say Y here. This
+ is the core support only, you will also need to select a driver for
+ your IEEE 1394 adapter.
+
+ This is the "JUJU" firewire stack, an alternative
+ implementation designed for roboustness and simplicity.
+
+ To compile this driver as a module, say M here: the
+ module will be called fw-core.
+
+endmenu
diff --git a/drivers/fw/Makefile b/drivers/fw/Makefile
new file mode 100644
index 0000000..1b2a3ad
--- /dev/null
+++ b/drivers/fw/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for the Linux IEEE 1394 implementation
+#
+
+fw-core-objs := fw-card.o fw-topology.o fw-transaction.o fw-iso.o
+
+obj-$(CONFIG_FW_CORE) += fw-core.o
diff --git a/drivers/fw/fw-card.c b/drivers/fw/fw-card.c
new file mode 100644
index 0000000..6840441
--- /dev/null
+++ b/drivers/fw/fw-card.c
@@ -0,0 +1,410 @@
+/* -*- c-basic-offset: 8 -*-
+ *
+ * fw-card.c - card level functions
+ *
+ * Copyright © 2005 Kristian Høgsberg <krh@bitplanet.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/device.h>
+#include "fw-transaction.h"
+#include "fw-topology.h"
+#include "fw-device.h"
+
+/* The lib/crc16.c implementation uses the standard (0x8005)
+ * polynomial, but we need the ITU-T (or CCITT) polynomial (0x1021).
+ * The implementation below works on an array of host-endian u32
+ * words, assuming they'll be transmited msb first. */
+static u16
+crc16_itu_t(const u32 *buffer, size_t length)
+{
+ int shift, i;
+ u32 data;
+ u16 sum, crc = 0;
+
+ for (i = 0; i < length; i++) {
+ data = *buffer++;
+ for (shift = 28; shift >= 0; shift -= 4 ) {
+ sum = ((crc >> 12) ^ (data >> shift)) & 0xf;
+ crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ (sum);
+ }
+ crc &= 0xffff;
+ }
+
+ return crc;
+}
+
+static LIST_HEAD(card_list);
+
+static LIST_HEAD(descriptor_list);
+static int descriptor_count;
+
+static u32 *
+generate_config_rom (struct fw_card *card, size_t *config_rom_length)
+{
+ struct fw_descriptor *desc;
+ struct fw_config_rom *crh;
+ static u32 config_rom[256];
+ int i, j, length;
+
+ /* Initialize contents of config rom buffer. On the OHCI
+ * controller, block reads to the config rom accesses the host
+ * memory, but quadlet read access the hardware bus info block
+ * registers. That's just crack, but it means we should make
+ * sure the contents of bus info block in host memory mathces
+ * the version stored in the OHCI registers. */
+
+ memset(config_rom, 0, sizeof config_rom);
+ crh = (struct fw_config_rom *) config_rom;
+ crh->crc_length = 4;
+ crh->info_length = 4;
+ crh->crc = 0;
+ crh->magic = 0x31333934;
+
+ crh->link_speed = card->link_speed;
+ /* 1394a 10.25 specifies that the config rom generation field
+ * must be updated every time a node updates its config rom
+ * and that it should be a number between 0x2 and 0xf; thus the
+ * generation++ % 14 + 2. */
+ crh->generation = card->config_rom_generation++ % 14 + 2;
+ crh->max_rom = 2;
+ crh->max_receive = card->max_receive;
+ crh->isc = 1;
+ crh->cmc = 1;
+ crh->imc = 1;
+ crh->guid_high = card->guid >> 32;
+ crh->guid_low = card->guid;
+
+ /* Generate root directory. */
+ i = 0;
+ crh->data[i++] = 0;
+ crh->data[i++] = 0x0c0083c0; /* node capabilities */
+ crh->data[i++] = 0x03d00d1e; /* vendor id */
+ j = i + descriptor_count;
+
+ /* Generate root directory entries for descriptors. */
+ list_for_each_entry (desc, &descriptor_list, link) {
+ crh->data[i] = desc->key | (j - i);
+ i++;
+ j += desc->length;
+ }
+
+ /* Update root directory length. */
+ crh->data[0] = (i - 1) << 16;
+
+ /* End of root directory, now copy in descriptors. */
+ list_for_each_entry (desc, &descriptor_list, link) {
+ memcpy(&crh->data[i], desc->data, desc->length * 4);
+ i += desc->length;
+ }
+
+ /* Byteswap and calculate CRCs for all blocks in the config
+ * rom. This assumes that CRC length and info length are
+ * identical for the bus info block, which is always the case
+ * for this implementation. */
+ for (i = 0; i < 5 + j; i += length + 1) {
+ length = (config_rom[i] >> 16) & 0xff;
+ config_rom[i] |= crc16_itu_t(&config_rom[i + 1], length);
+ }
+
+ *config_rom_length = 5 + j;
+
+ return config_rom;
+}
+
+static void
+update_config_roms (void)
+{
+ struct fw_card *card;
+ u32 *config_rom;
+ int length;
+
+ list_for_each_entry (card, &card_list, link) {
+ config_rom = generate_config_rom(card, &length);
+ card->driver->set_config_rom(card, config_rom, length);
+ }
+}
+
+int
+fw_core_add_descriptor (struct fw_descriptor *desc)
+{
+ size_t i;
+
+ /* Check descriptor is valid; the length of all blocks in the
+ * descriptor has to add up to exactly the length of the
+ * block. */
+ i = 0;
+ while (i < desc->length)
+ i += (desc->data[i] >> 16) + 1;
+
+ if (i != desc->length)
+ return -1;
+
+ down_write(&fw_bus_type.subsys.rwsem);
+
+ list_add_tail (&desc->link, &descriptor_list);
+ descriptor_count++;
+ update_config_roms();
+
+ up_write(&fw_bus_type.subsys.rwsem);
+
+ return 0;
+}
+EXPORT_SYMBOL(fw_core_add_descriptor);
+
+void
+fw_core_remove_descriptor (struct fw_descriptor *desc)
+{
+ down_write(&fw_bus_type.subsys.rwsem);
+
+ list_del(&desc->link);
+ descriptor_count--;
+ update_config_roms();
+
+ up_write(&fw_bus_type.subsys.rwsem);
+}
+EXPORT_SYMBOL(fw_core_remove_descriptor);
+
+static void
+fw_card_irm_work(void *data)
+{
+ struct fw_card *card = data;
+ struct fw_device *root;
+ unsigned long flags;
+
+ /* FIXME: This simple bus management unconditionally picks a
+ * cycle master if the current root can't do it. We need to
+ * not do this if there is a bus manager already. Also, some
+ * hubs set the contender bit, which is bogus, so we should
+ * probably do a little sanity check on the IRM (like, read
+ * the bandwidth register) if it's not us. */
+
+ spin_lock_irqsave(&card->lock, flags);
+
+ root = card->root_node->data;
+
+ /* Either link_on is false, or we failed to read the config
+ * rom. In either case, pick another root. */
+ if (root == NULL)
+ goto reset;
+
+ /* If we haven't probed this device yet, bail out now and
+ * let's try again once that's done. */
+ if (root->state != FW_DEVICE_RUNNING)
+ goto out;
+
+ if (root->config_rom->cmc)
+ /* FIXME: I suppose we should set the cmstr bit in the
+ * STATE_CLEAR register of this node, as described in
+ * 1394-1995, 8.4.2.6. Also, send out a force root
+ * packet for this node. */
+ goto out;
+
+ reset:
+ if (card->irm_retries++ > 5)
+ goto out;
+
+ fw_notify("Trying to become root (card %p)\n", card);
+ fw_send_force_root(card, card->local_node->node_id,
+ card->generation);
+ fw_core_initiate_bus_reset(card, 1);
+
+ out:
+ spin_unlock_irqrestore(&card->lock, flags);
+}
+
+static void
+release_card(struct device *device)
+{
+ struct fw_card *card =
+ container_of(device, struct fw_card, card_device);
+
+ kfree(card);
+}
+
+int
+fw_core_add_card (struct fw_card *card, struct fw_card_driver *driver,
+ struct device *device,
+ u32 max_receive, u32 link_speed, u64 guid)
+{
+ static int index;
+ u32 *config_rom;
+ int length, retval;
+
+ card->index = index++;
+ card->driver = driver;
+ card->device = device;
+ card->max_receive = max_receive;
+ card->link_speed = link_speed;
+ card->guid = guid;
+ card->current_tlabel = 0;
+ card->tlabel_mask = 0;
+ card->color = 0;
+
+ INIT_LIST_HEAD(&card->transaction_list);
+ spin_lock_init(&card->lock);
+
+ card->local_node = NULL;
+
+ /* FIXME: add #define's for phy registers. */
+ /* Activate link_on bit and contender bit in our self ID packets.*/
+ if (driver->update_phy_reg(card, 4, 0, 0x80 | 0x40) < 0)
+ return -EIO;
+
+ down_write(&fw_bus_type.subsys.rwsem);
+
+ config_rom = generate_config_rom (card, &length);
+
+ list_add_tail(&card->link, &card_list);
+
+ up_write(&fw_bus_type.subsys.rwsem);
+
+ INIT_WORK(&card->work, fw_card_irm_work, card);
+
+ card->card_device.bus = &fw_bus_type;
+ card->card_device.release = release_card;
+ card->card_device.parent = card->device;
+ snprintf(card->card_device.bus_id, sizeof card->card_device.bus_id,
+ "fwcard%d", card->index);
+
+ retval = device_register(&card->card_device);
+ if (retval < 0) {
+ fw_error("Failed to register card device.");
+ return retval;
+ }
+
+ /* The subsystem grabs a reference when the card is added and
+ * drops it when the driver calls fw_core_remove_card. */
+ fw_card_get(card);
+
+ return driver->enable(card, config_rom, length);
+}
+EXPORT_SYMBOL(fw_core_add_card);
+
+/* The next few functions implements a dummy driver that use once a
+ * card driver shuts down an fw_card. This allows the driver to
+ * cleanly unload, as all IO to the card will be handled by the dummy
+ * driver instead of calling into the (possibly) unloaded module. The
+ * dummy driver just fails all IO. */
+
+static int
+dummy_enable(struct fw_card *card, u32 *config_rom, size_t length)
+{
+ BUG();
+ return -1;
+}
+
+static int
+dummy_update_phy_reg(struct fw_card *card, int address,
+ int clear_bits, int set_bits)
+{
+ return -ENODEV;
+}
+
+static int
+dummy_set_config_rom(struct fw_card *card,
+ u32 *config_rom, size_t length)
+{
+ /* We take the card out of card_list before setting the dummy
+ * driver, so this should never get called. */
+ BUG();
+ return -1;
+}
+
+static void
+dummy_send_request(struct fw_card *card, struct fw_packet *packet)
+{
+ packet->callback(packet, card, -ENODEV);
+}
+
+static void
+dummy_send_response(struct fw_card *card, struct fw_packet *packet)
+{
+ packet->callback(packet, card, -ENODEV);
+}
+
+static int
+dummy_enable_phys_dma(struct fw_card *card,
+ int node_id, int generation)
+{
+ return -ENODEV;
+}
+
+static struct fw_card_driver dummy_driver = {
+ .name = "dummy",
+ .enable = dummy_enable,
+ .update_phy_reg = dummy_update_phy_reg,
+ .set_config_rom = dummy_set_config_rom,
+ .send_request = dummy_send_request,
+ .send_response = dummy_send_response,
+ .enable_phys_dma = dummy_enable_phys_dma
+};
+
+void flush_transactions(struct fw_card *card, u32 timestamp);
+
+void
+fw_core_remove_card(struct fw_card *card)
+{
+ down_write(&fw_bus_type.subsys.rwsem);
+ list_del(&card->link);
+ up_write(&fw_bus_type.subsys.rwsem);
+
+ /* Set up the dummy driver. */
+ card->driver = &dummy_driver;
+
+ flush_transactions(card, 0x20000);
+
+ fw_destroy_nodes(card);
+
+ /* This also drops the subsystem reference. */
+ device_unregister(&card->card_device);
+}
+EXPORT_SYMBOL(fw_core_remove_card);
+
+struct fw_card *
+fw_card_get(struct fw_card *card)
+{
+ get_device(&card->card_device);
+
+ return card;
+}
+EXPORT_SYMBOL(fw_card_get);
+
+/* An assumption for fw_card_put() is that the card driver allocates
+ * the fw_card struct with kalloc and that it has been shut down
+ * before the last ref is dropped. */
+void
+fw_card_put(struct fw_card *card)
+{
+ put_device(&card->card_device);
+}
+EXPORT_SYMBOL(fw_card_put);
+
+int
+fw_core_initiate_bus_reset(struct fw_card *card, int short_reset)
+{
+ u32 address;
+
+ if (short_reset)
+ address = 5;
+ else
+ address = 1;
+
+ return card->driver->update_phy_reg(card, address, 0, 0x40);
+}
+EXPORT_SYMBOL(fw_core_initiate_bus_reset);
diff --git a/drivers/fw/fw-iso.c b/drivers/fw/fw-iso.c
new file mode 100644
index 0000000..8cfaa5a
--- /dev/null
+++ b/drivers/fw/fw-iso.c
@@ -0,0 +1,136 @@
+/* -*- c-basic-offset: 8 -*-
+ *
+ * fw-iso.c - Isochronous IO
+ * Copyright (C) 2006 Kristian Høgsberg <krh@bitplanet.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <linux/vmalloc.h>
+
+#include "fw-transaction.h"
+#include "fw-topology.h"
+#include "fw-device.h"
+
+static int
+setup_iso_buffer(struct fw_iso_context *ctx, size_t size,
+ enum dma_data_direction direction)
+{
+ struct page *page;
+ int i;
+ void *p;
+
+ ctx->buffer_size = PAGE_ALIGN(size);
+ if (size == 0)
+ return 0;
+
+ ctx->buffer = vmalloc_32_user(ctx->buffer_size);
+ if (ctx->buffer == NULL)
+ return -ENOMEM;
+
+ ctx->page_count = ctx->buffer_size >> PAGE_SHIFT;
+ ctx->pages =
+ kzalloc(ctx->page_count * sizeof(ctx->pages[0]), GFP_KERNEL);
+ if (ctx->pages == NULL) {
+ vfree(ctx->buffer);
+ return -ENOMEM;
+ }
+
+ p = ctx->buffer;
+ for (i = 0; i < ctx->page_count; i++, p += PAGE_SIZE) {
+ page = vmalloc_to_page(p);
+ ctx->pages[i] = dma_map_page(ctx->card->device,
+ page, 0, PAGE_SIZE, direction);
+ }
+
+ return 0;
+}
+
+static void destroy_iso_buffer(struct fw_iso_context *ctx)
+{
+ int i;
+
+ for (i = 0; i < ctx->page_count; i++)
+ dma_unmap_page(ctx->card->device, ctx->pages[i],
+ PAGE_SIZE, DMA_TO_DEVICE);
+
+ kfree(ctx->pages);
+ vfree(ctx->buffer);
+}
+
+struct fw_iso_context *fw_iso_context_create(struct fw_card *card, int type,
+ size_t buffer_size,
+ fw_iso_callback_t callback,
+ void *callback_data)
+{
+ struct fw_iso_context *ctx;
+ int retval;
+
+ ctx = card->driver->allocate_iso_context(card, type);
+ if (IS_ERR(ctx))
+ return ctx;
+
+ ctx->card = card;
+ ctx->type = type;
+ ctx->callback = callback;
+ ctx->callback_data = callback_data;
+
+ retval = setup_iso_buffer(ctx, buffer_size, DMA_TO_DEVICE);
+ if (retval < 0) {
+ card->driver->free_iso_context(ctx);
+ return ERR_PTR(retval);
+ }
+
+ return ctx;
+}
+
+EXPORT_SYMBOL(fw_iso_context_create);
+
+void fw_iso_context_destroy(struct fw_iso_context *ctx)
+{
+ struct fw_card *card = ctx->card;
+
+ destroy_iso_buffer(ctx);
+
+ card->driver->free_iso_context(ctx);
+}
+
+EXPORT_SYMBOL(fw_iso_context_destroy);
+
+int
+fw_iso_context_send(struct fw_iso_context *ctx,
+ int channel, int speed, int cycle)
+{
+ ctx->channel = channel;
+ ctx->speed = speed;
+
+ return ctx->card->driver->send_iso(ctx, cycle);
+}
+
+EXPORT_SYMBOL(fw_iso_context_send);
+
+int
+fw_iso_context_queue(struct fw_iso_context *ctx,
+ struct fw_iso_packet *packet, void *payload)
+{
+ struct fw_card *card = ctx->card;
+
+ return card->driver->queue_iso(ctx, packet, payload);
+}
+
+EXPORT_SYMBOL(fw_iso_context_queue);
diff --git a/drivers/fw/fw-topology.c b/drivers/fw/fw-topology.c
new file mode 100644
index 0000000..9fe1ab8
--- /dev/null
+++ b/drivers/fw/fw-topology.c
@@ -0,0 +1,444 @@
+/* -*- c-basic-offset: 8 -*-
+ *
+ * fw-topology.c - Incremental bus scan, based on bus topology
+ *
+ * Copyright (C) 2004 Kristian Høgsberg <krh@bitplanet.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/wait.h>
+#include <linux/errno.h>
+#include "fw-transaction.h"
+#include "fw-topology.h"
+
+static struct fw_phy_packet *count_ports(struct fw_phy_packet *sid,
+ int *total_port_count,
+ int *child_port_count)
+{
+ struct fw_phy_packet q;
+ int port_type, shift, seq;
+
+ *total_port_count = 0;
+ *child_port_count = 0;
+
+ shift = 6;
+ q = *sid;
+ seq = 0;
+
+ while (1) {
+ port_type = (q.quadlet >> shift) & 0x03;
+ switch (port_type) {
+ case SELFID_PORT_CHILD:
+ (*child_port_count)++;
+ case SELFID_PORT_PARENT:
+ case SELFID_PORT_NCONN:
+ (*total_port_count)++;
+ case SELFID_PORT_NONE:
+ break;
+ }
+
+ shift -= 2;
+ if (shift == 0) {
+ if (!q.self_id.more_packets)
+ return sid + 1;
+
+ shift = 16;
+ sid++;
+ q = *sid;
+
+ /* Check that the extra packets actually are
+ * extended self ID packets and that the
+ * sequence numbers in the extended self ID
+ * packets increase as expected. */
+
+ if (!q.extended_self_id.extended ||
+ seq != q.extended_self_id.sequence)
+ return NULL;
+
+ seq++;
+ }
+ }
+}
+
+static int get_port_type(struct fw_phy_packet *sid, int port_index)
+{
+ int index, shift;
+
+ index = (port_index + 5) / 8;
+ shift = 16 - ((port_index + 5) & 7) * 2;
+ return (sid[index].quadlet >> shift) & 0x03;
+}
+
+/* Nodes are created with a ref count of one, belonging to the tree
+ * they are part of. */
+struct fw_node *fw_node_create(struct fw_phy_packet sid, int port_count,
+ int color)
+{
+ struct fw_node *node;
+
+ node = kzalloc(sizeof *node + port_count * sizeof node->ports[0],
+ GFP_ATOMIC);
+ if (node == NULL)
+ return NULL;
+
+ node->color = color;
+ node->node_id = sid.self_id.phy_id;
+ node->link_on = sid.self_id.link_on;
+ node->phy_speed = sid.self_id.phy_speed;
+ node->port_count = port_count;
+
+ atomic_set(&node->ref_count, 1);
+ INIT_LIST_HEAD(&node->link);
+
+ return node;
+}
+
+/**
+ * build_tree - Build the tree representation of the topology
+ * @self_ids: array of self IDs to create the tree from
+ * @self_id_count: the length of the self_ids array
+ * @local_id: the node ID of the local node
+ *
+ * This function builds the tree representation of the topology given
+ * by the self IDs from the latest bus reset. During the construction
+ * of the tree, the function checks that the self IDs are valid and
+ * internally consistent. On succcess this funtions returns the
+ * fw_node corresponding to the local card otherwise NULL.
+ */
+static struct fw_node *build_tree(struct fw_card *card)
+{
+ struct fw_node *node, *child, *local_node;
+ struct list_head stack, *h;
+ struct fw_phy_packet *sid, *next_sid, *end, q;
+ int i, port_count, child_port_count, phy_id, parent_count, stack_depth;
+
+ local_node = NULL;
+ node = NULL;
+ INIT_LIST_HEAD(&stack);
+ stack_depth = 0;
+ sid = (struct fw_phy_packet *)card->self_ids;
+ end = sid + card->self_id_count;
+ phy_id = 0;
+ card->irm_node = NULL;
+
+ while (sid < end) {
+ next_sid = count_ports(sid, &port_count, &child_port_count);
+
+ if (next_sid == NULL) {
+ fw_error("Inconsistent extended self IDs.\n");
+ return NULL;
+ }
+
+ q = *sid;
+ if (phy_id != q.self_id.phy_id) {
+ fw_error("PHY ID mismatch in self ID: %d != %d.\n",
+ phy_id, q.self_id.phy_id);
+ return NULL;
+ }
+
+ if (child_port_count > stack_depth) {
+ fw_error("Topology stack underflow\n");
+ return NULL;
+ }
+
+ /* Seek back from the top of our stack to find the
+ * start of the child nodes for this node. */
+ for (i = 0, h = &stack; i < child_port_count; i++)
+ h = h->prev;
+ child = fw_node(h);
+
+ node = fw_node_create(q, port_count, card->color);
+ if (node == NULL) {
+ fw_error("Out of memory while building topology.");
+ return NULL;
+ }
+
+ if (phy_id == (card->node_id & 0x3f))
+ local_node = node;
+
+ if (q.self_id.contender)
+ card->irm_node = node;
+
+ parent_count = 0;
+
+ for (i = 0; i < port_count; i++) {
+ switch (get_port_type(sid, i)) {
+ case SELFID_PORT_PARENT:
+ /* Who's your daddy? We dont know the
+ * parent node at this time, so we
+ * temporarily abuse node->color for
+ * remembering the entry in the
+ * node->ports array where the parent
+ * node should be. Later, when we
+ * handle the parent node, we fix up
+ * the reference.
+ */
+ parent_count++;
+ node->color = i;
+ break;
+
+ case SELFID_PORT_CHILD:
+ node->ports[i].node = child;
+ /* Fix up parent reference for this
+ * child node. */
+ child->ports[child->color].node = node;
+ child->color = card->color;
+ child = fw_node(child->link.next);
+ break;
+ }
+ }
+
+ /* Check that the node reports exactly one parent
+ * port, except for the root, which of course should
+ * have no parents. */
+ if ((next_sid == end && parent_count != 0) ||
+ (next_sid < end && parent_count != 1)) {
+ fw_error("Parent port inconsistency for node %d: "
+ "parent_count=%d\n", phy_id, parent_count);
+ return NULL;
+ }
+
+ /* Pop the child nodes off the stack and push the new node. */
+ __list_del(h->prev, &stack);
+ list_add_tail(&node->link, &stack);
+ stack_depth += 1 - child_port_count;
+
+ sid = next_sid;
+ phy_id++;
+ }
+
+ card->root_node = node;
+
+ return local_node;
+}
+
+typedef void (*fw_node_callback_t) (struct fw_card * card,
+ struct fw_node * node,
+ struct fw_node * parent);
+
+static void
+for_each_fw_node(struct fw_card *card, struct fw_node *root,
+ fw_node_callback_t callback)
+{
+ struct list_head list;
+ struct fw_node *node, *child, *parent;
+ int i;
+
+ INIT_LIST_HEAD(&list);
+
+ list_add_tail(&root->link, &list);
+ parent = NULL;
+ while (!list_empty(&list)) {
+ node = fw_node(list.next);
+ list_del(&node->link);
+ node->color = card->color;
+
+ for (i = 0; i < node->port_count; i++) {
+ child = node->ports[i].node;
+ if (!child)
+ continue;
+ if (child->color == card->color)
+ parent = child;
+ else
+ list_add_tail(&child->link, &list);
+ }
+
+ callback(card, node, parent);
+ }
+}
+
+static void
+report_lost_node(struct fw_card *card,
+ struct fw_node *node, struct fw_node *parent)
+{
+ fw_node_event(card, node, FW_NODE_DESTROYED);
+ fw_node_put(node);
+}
+
+static void
+report_found_node(struct fw_card *card,
+ struct fw_node *node, struct fw_node *parent)
+{
+ int b_path = (node->phy_speed == SCODE_BETA);
+
+ if (parent != NULL) {
+ node->max_speed = min(parent->max_speed, node->phy_speed);
+ node->b_path = parent->b_path && b_path;
+ } else {
+ node->max_speed = node->phy_speed;
+ node->b_path = b_path;
+ }
+
+ fw_node_event(card, node, FW_NODE_CREATED);
+}
+
+void fw_destroy_nodes(struct fw_card *card)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&card->lock, flags);
+ card->color++;
+ if (card->local_node != NULL)
+ for_each_fw_node(card, card->local_node, report_lost_node);
+ spin_unlock_irqrestore(&card->lock, flags);
+}
+
+static void move_tree(struct fw_node *node0, struct fw_node *node1, int port)
+{
+ struct fw_node *tree;
+ int i;
+
+ tree = node1->ports[port].node;
+ node0->ports[port].node = tree;
+ for (i = 0; i < tree->port_count; i++) {
+ if (tree->ports[i].node == node1) {
+ tree->ports[i].node = node0;
+ break;
+ }
+ }
+}
+
+/**
+ * update_tree - compare the old topology tree for card with the new
+ * one specified by root. Queue the nodes and mark them as either
+ * found, lost or updated. Update the nodes in the card topology tree
+ * as we go.
+ */
+static void
+update_tree(struct fw_card *card, struct fw_node *root, int *changed)
+{
+ struct list_head list0, list1;
+ struct fw_node *node0, *node1;
+ int i, event;
+
+ INIT_LIST_HEAD(&list0);
+ list_add_tail(&card->local_node->link, &list0);
+ INIT_LIST_HEAD(&list1);
+ list_add_tail(&root->link, &list1);
+
+ node0 = fw_node(list0.next);
+ node1 = fw_node(list1.next);
+ *changed = 0;
+
+ while (&node0->link != &list0) {
+
+ /* assert(node0->port_count == node1->port_count); */
+ if (node0->link_on && !node1->link_on)
+ event = FW_NODE_LINK_OFF;
+ else if (!node0->link_on && node1->link_on)
+ event = FW_NODE_LINK_ON;
+ else
+ event = FW_NODE_UPDATED;
+
+ node0->node_id = node1->node_id;
+ node0->color = card->color;
+ node0->link_on = node1->link_on;
+ node0->initiated_reset = node1->initiated_reset;
+ node1->color = card->color;
+ fw_node_event(card, node0, event);
+
+ if (card->root_node == node1)
+ card->root_node = node0;
+ if (card->irm_node == node1)
+ card->irm_node = node0;
+
+ for (i = 0; i < node0->port_count; i++) {
+ if (node0->ports[i].node && node1->ports[i].node) {
+ /* This port didn't change, queue the
+ * connected node for further
+ * investigation. */
+ if (node0->ports[i].node->color == card->color)
+ continue;
+ list_add_tail(&node0->ports[i].node->link,
+ &list0);
+ list_add_tail(&node1->ports[i].node->link,
+ &list1);
+ } else if (node0->ports[i].node) {
+ /* The nodes connected here were
+ * unplugged; unref the lost nodes and
+ * queue FW_NODE_LOST callbacks for
+ * them. */
+
+ for_each_fw_node(card, node0->ports[i].node,
+ report_lost_node);
+ node0->ports[i].node = NULL;
+ *changed = 1;
+ } else if (node1->ports[i].node) {
+ /* One or more node were connected to
+ * this port. Move the new nodes into
+ * the tree and queue FW_NODE_CREATED
+ * callbacks for them. */
+ move_tree(node0, node1, i);
+ for_each_fw_node(card, node0->ports[i].node,
+ report_found_node);
+ *changed = 1;
+ }
+ }
+
+ node0 = fw_node(node0->link.next);
+ node1 = fw_node(node1->link.next);
+ }
+}
+
+void flush_transactions(struct fw_card *card, u32 timestamp);
+
+void
+fw_core_handle_bus_reset(struct fw_card *card,
+ int node_id, int generation,
+ int self_id_count, u32 * self_ids)
+{
+ struct fw_node *local_node;
+ unsigned long flags;
+ int changed;
+
+ flush_transactions(card, 0x20000);
+
+ spin_lock_irqsave(&card->lock, flags);
+
+ card->node_id = node_id;
+ card->self_id_count = self_id_count;
+ card->generation = generation;
+ memcpy(card->self_ids, self_ids, self_id_count * 4);
+
+ local_node = build_tree(card);
+
+ card->color++;
+
+ if (local_node == NULL) {
+ fw_error("topology build failed\n");
+ /* FIXME: We need to issue a bus reset in this case. */
+ } else if (card->local_node == NULL) {
+ card->local_node = local_node;
+ for_each_fw_node(card, local_node, report_found_node);
+ } else {
+ update_tree(card, local_node, &changed);
+ if (changed)
+ card->irm_retries = 0;
+ }
+
+ /* If we're not the root node, we may have to do some IRM work. */
+ if (card->local_node != card->root_node)
+ schedule_work(&card->work);
+
+ spin_unlock_irqrestore(&card->lock, flags);
+}
+
+EXPORT_SYMBOL(fw_core_handle_bus_reset);
+
+void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
+{
+}
diff --git a/drivers/fw/fw-topology.h b/drivers/fw/fw-topology.h
new file mode 100644
index 0000000..219f50e
--- /dev/null
+++ b/drivers/fw/fw-topology.h
@@ -0,0 +1,131 @@
+/* -*- c-basic-offset: 8 -*-
+ *
+ * fw-topology.h -- Incremental bus scan, based on bus topology
+ *
+ * Copyright (C) 2003 Kristian Hoegsberg <krh@bitplanet.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __fw_topology_h
+#define __fw_topology_h
+
+struct fw_phy_packet {
+ union {
+ struct {
+ u32 reserved : 24;
+ u32 phy_id : 6;
+ u32 identifier : 2;
+ } link_on;
+
+ struct {
+ u32 reserved : 16;
+ u32 gap_count : 6;
+ u32 t : 1;
+ u32 r : 1;
+ u32 root_id : 6;
+ u32 identifier : 2;
+ } phy_config;
+
+ struct {
+ u32 more_packets : 1;
+ u32 initiated_reset : 1;
+ u32 ports : 6;
+ u32 power : 3;
+ u32 contender : 1;
+ u32 delay : 2;
+ u32 phy_speed : 2;
+ u32 gap_count : 6;
+ u32 link_on : 1;
+ u32 extended : 1;
+ u32 phy_id : 6;
+ u32 packet_type : 2;
+ } self_id;
+
+ struct {
+ u32 more_packets : 1;
+ u32 reserved0 : 1;
+ u32 ports : 16;
+ u32 reserved1 : 2;
+ u32 sequence : 3;
+ u32 extended : 1;
+ u32 phy_id : 6;
+ u32 packet_type : 2;
+ } extended_self_id;
+
+ u32 quadlet;
+ };
+};
+
+enum {
+ FW_NODE_CREATED = 0x00,
+ FW_NODE_UPDATED = 0x01,
+ FW_NODE_DESTROYED = 0x02,
+ FW_NODE_LINK_ON = 0x03,
+ FW_NODE_LINK_OFF = 0x04
+};
+
+struct fw_port {
+ struct fw_node *node;
+ unsigned speed : 3; /* S100, S200, ... S3200 */
+};
+
+struct fw_node {
+ u16 node_id;
+ u8 color;
+ u8 port_count;
+ unsigned link_on : 1;
+ unsigned initiated_reset : 1;
+ unsigned b_path : 1;
+ u8 phy_speed; /* As in the self ID packet. */
+ u8 max_speed; /* Minimum of all phy-speeds and port speeds on
+ * the path from the local node to this node. */
+
+ atomic_t ref_count;
+
+ /* For serializing node topology into a list. */
+ struct list_head link;
+
+ /* Upper layer specific data. */
+ void *data;
+
+ struct fw_port ports[0];
+};
+
+extern inline struct fw_node *
+fw_node(struct list_head *l)
+{
+ return list_entry (l, struct fw_node, link);
+}
+
+extern inline struct fw_node *
+fw_node_get(struct fw_node *node)
+{
+ atomic_inc(&node->ref_count);
+
+ return node;
+}
+
+extern inline void
+fw_node_put(struct fw_node *node)
+{
+ if (atomic_dec_and_test(&node->ref_count))
+ kfree(node);
+}
+
+void
+fw_destroy_nodes(struct fw_card *card);
+
+#endif
diff --git a/drivers/fw/fw-transaction.c b/drivers/fw/fw-transaction.c
new file mode 100644
index 0000000..a42e985
--- /dev/null
+++ b/drivers/fw/fw-transaction.c
@@ -0,0 +1,856 @@
+/* -*- c-basic-offset: 8 -*-
+ *
+ * fw-transaction.c - core IEEE1394 transaction logic
+ *
+ * Copyright (C) 2004 Kristian Høgsberg <krh@bitplanet.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/poll.h>
+#include <linux/list.h>
+#include <linux/kthread.h>
+#include <asm/uaccess.h>
+#include <asm/semaphore.h>
+
+#include "fw-transaction.h"
+#include "fw-topology.h"
+#include "fw-device.h"
+
+struct fw_packet_header {
+ union {
+ struct {
+ unsigned int priority:4;
+ unsigned int tcode:4;
+ unsigned int rt:2;
+ unsigned int tlabel:6;
+ unsigned int destination:16;
+ unsigned int offset_high:16;
+ unsigned int source:16;
+ unsigned long offset_low;
+ } request;
+
+ struct {
+ unsigned int priority:4;
+ unsigned int tcode:4;
+ unsigned int rt:2;
+ unsigned int tlabel:6;
+ unsigned int destination:16;
+ unsigned int reserved0:12;
+ unsigned int rcode:4;
+ unsigned int source:16;
+ unsigned long reserved1;
+ } response;
+
+ struct {
+ unsigned int priority:4;
+ unsigned int tcode:4;
+ unsigned int rt:2;
+ unsigned int tlabel:6;
+ unsigned int destination:16;
+ unsigned int offset_high:16;
+ unsigned int source:16;
+ unsigned long offset_low;
+ } read_quadlet_request;
+
+ struct {
+ unsigned int priority:4;
+ unsigned int tcode:4;
+ unsigned int rt:2;
+ unsigned int tlabel:6;
+ unsigned int destination:16;
+ unsigned int reserved0:12;
+ unsigned int rcode:4;
+ unsigned int source:16;
+ unsigned long reserved1;
+ unsigned long data;
+ } read_quadlet_response;
+
+ struct {
+ unsigned int priority:4;
+ unsigned int tcode:4;
+ unsigned int rt:2;
+ unsigned int tlabel:6;
+ unsigned int destination:16;
+ unsigned int offset_high:16;
+ unsigned int source:16;
+ unsigned long offset_low;
+ unsigned int extended_tcode:16;
+ unsigned int data_length:16;
+ } read_block_request;
+
+ /* This response packet format is the same for block
+ * read responses and lock responses. Furthermore, we
+ * define a field called block_response, for the
+ * situations where we want to treat responses with
+ * block payload generically. */
+ struct {
+ unsigned int priority:4;
+ unsigned int tcode:4;
+ unsigned int rt:2;
+ unsigned int tlabel:6;
+ unsigned int destination:16;
+ unsigned int reserved0:12;
+ unsigned int rcode:4;
+ unsigned int source:16;
+ unsigned long reserved1;
+ unsigned int extended_tcode:16;
+ unsigned int data_length:16;
+ u32 data[0];
+ } read_block_response, lock_response, block_response;
+
+ struct {
+ unsigned int priority:4;
+ unsigned int tcode:4;
+ unsigned int rt:2;
+ unsigned int tlabel:6;
+ unsigned int destination:16;
+ unsigned int offset_high:16;
+ unsigned int source:16;
+ u32 offset_low;
+ u32 data;
+ } write_quadlet_request;
+
+ /* This response packet format is the same for block
+ * write requests and lock requests. Furthermore, we
+ * define a field called block_request, for the
+ * situations where we want to treat requests with
+ * block payload generically. */
+ struct {
+ unsigned int priority:4;
+ unsigned int tcode:4;
+ unsigned int rt:2;
+ unsigned int tlabel:6;
+ unsigned int destination:16;
+ unsigned int offset_high:16;
+ unsigned int source:16;
+ unsigned int offset_low:32;
+ unsigned int extended_tcode:16;
+ unsigned int data_length:16;
+ u32 data[0];
+ } write_block_request, lock_request, block_request;
+
+ struct {
+ unsigned int priority:4;
+ unsigned int tcode:4;
+ unsigned int rt:2;
+ unsigned int tlabel:6;
+ unsigned int destination:16;
+ unsigned int reserved0:12;
+ unsigned int rcode:4;
+ unsigned int source:16;
+ unsigned long reserved1;
+ } write_response;
+ };
+};
+
+static void
+close_transaction(struct fw_transaction *t, struct fw_card *card, int rcode,
+ u32 * payload, size_t length)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&card->lock, flags);
+ card->tlabel_mask &= ~(1 << t->tlabel);
+ list_del(&t->link);
+ spin_unlock_irqrestore(&card->lock, flags);
+
+ t->callback(card, rcode, payload, length, t->callback_data);
+}
+
+static struct fw_transaction *lookup_transaction(struct fw_card *card,
+ int source, int tlabel)
+{
+ struct fw_transaction *t, *result;
+ unsigned long flags;
+
+ result = NULL;
+ spin_lock_irqsave(&card->lock, flags);
+ list_for_each_entry(t, &card->transaction_list, link) {
+ if (t->node_id == source && t->tlabel == tlabel) {
+ result = t;
+ break;
+ }
+ }
+ spin_unlock_irqrestore(&card->lock, flags);
+
+ return result;
+}
+
+static void
+transmit_complete_callback(struct fw_packet *packet,
+ struct fw_card *card, int status)
+{
+ struct fw_transaction *t =
+ container_of(packet, struct fw_transaction, packet);
+
+ switch (status) {
+ case ACK_COMPLETE:
+ close_transaction(t, card, RCODE_COMPLETE, NULL, 0);
+ break;
+ case ACK_PENDING:
+ t->timestamp = packet->timestamp;
+ break;
+ case ACK_BUSY_X:
+ case ACK_BUSY_A:
+ case ACK_BUSY_B:
+ close_transaction(t, card, RCODE_BUSY, NULL, 0);
+ break;
+ case ACK_DATA_ERROR:
+ case ACK_TYPE_ERROR:
+ close_transaction(t, card, RCODE_SEND_ERROR, NULL, 0);
+ break;
+ default:
+ /* FIXME: In this case, status is a negative errno,
+ * corresponding to an OHCI specific transmit error
+ * code. We should map that to an RCODE instead of
+ * just the generic RCODE_SEND_ERROR. */
+ close_transaction(t, card, RCODE_SEND_ERROR, NULL, 0);
+ break;
+ }
+}
+
+void
+fw_fill_packet(struct fw_packet *packet, int tcode, int tlabel,
+ int node_id, int generation, int speed,
+ unsigned long long offset, u32 * payload, size_t length)
+{
+ int ext_tcode;
+ struct fw_packet_header *header;
+
+ if (tcode > 0x10) {
+ ext_tcode = tcode - 0x10;
+ tcode = TCODE_LOCK_REQUEST;
+ } else
+ ext_tcode = 0;
+
+ header = (struct fw_packet_header *)packet->header;
+ header->request.priority = 0;
+ header->request.rt = RETRY_X;
+ header->request.tlabel = tlabel;
+ header->request.tcode = tcode;
+ header->request.destination = node_id | LOCAL_BUS;
+ header->request.offset_high = offset >> 32;
+ header->request.source = 0; /* Inserted by OHCI controller */
+ header->request.offset_low = offset;
+
+ switch (tcode) {
+ case TCODE_WRITE_QUADLET_REQUEST:
+ header->write_quadlet_request.data = payload[0];
+ packet->header_length = sizeof header->write_quadlet_request;
+ packet->payload_length = 0;
+ break;
+
+ case TCODE_LOCK_REQUEST:
+ case TCODE_WRITE_BLOCK_REQUEST:
+ header->block_request.data_length = length;
+ header->block_request.extended_tcode = ext_tcode;
+ packet->header_length = sizeof header->block_request;
+ packet->payload = payload;
+ packet->payload_length = length;
+ break;
+
+ case TCODE_READ_QUADLET_REQUEST:
+ packet->header_length = sizeof header->read_quadlet_request;
+ packet->payload_length = 0;
+ break;
+
+ case TCODE_READ_BLOCK_REQUEST:
+ header->read_block_request.data_length = length;
+ header->read_block_request.extended_tcode = 0;
+ packet->header_length = sizeof header->read_block_request;
+ packet->payload_length = 0;
+ break;
+ }
+
+ packet->speed = speed;
+ packet->generation = generation;
+}
+
+/**
+ * This function provides low-level access to the IEEE1394 transaction
+ * logic. Most C programs would use either fw_read(), fw_write() or
+ * fw_lock() instead - those function are convenience wrappers for
+ * this function. The fw_send_request() function is primarily
+ * provided as a flexible, one-stop entry point for languages bindings
+ * and protocol bindings.
+ *
+ * FIXME: Document this function further, in particular the possible
+ * values for rcode in the callback. In short, we map ACK_COMPLETE to
+ * RCODE_COMPLETE, internal errors set errno and set rcode to
+ * RCODE_SEND_ERROR (which is out of range for standard ieee1394
+ * rcodes). All other rcodes are forwarded unchanged. For all
+ * errors, payload is NULL, length is 0.
+ *
+ * Can not expect the callback to be called before the function
+ * returns, though this does happen in some cases (ACK_COMPLETE and
+ * errors).
+ *
+ * The payload is only used for write requests and must not be freed
+ * until the callback has been called.
+ *
+ * @param card the card from which to send the request
+ * @param tcode the tcode for this transaction. Do not use
+ * TCODE_LOCK_REQUEST directly, insted use TCODE_LOCK_MASK_SWAP
+ * etc. to specify tcode and ext_tcode.
+ * @param node_id the node_id of the destination node
+ * @param generation the generation for which node_id is valid
+ * @param speed the speed to use for sending the request
+ * @param offset the 48 bit offset on the destination node
+ * @param payload the data payload for the request subaction
+ * @param length the length in bytes of the data to read
+ * @param callback function to be called when the transaction is completed
+ * @param callback_data pointer to arbitrary data, which will be
+ * passed to the callback
+ */
+void
+fw_send_request(struct fw_card *card, struct fw_transaction *t,
+ int tcode, int node_id, int generation, int speed,
+ unsigned long long offset,
+ u32 * payload, size_t length,
+ fw_transaction_callback_t callback, void *callback_data)
+{
+ unsigned long flags;
+ int tlabel;
+
+ /* Allocate tlabel from the bitmap and put the transaction on
+ * the list while holding the card spinlock. */
+
+ spin_lock_irqsave(&card->lock, flags);
+
+ tlabel = card->current_tlabel;
+ if (card->tlabel_mask & (1 << tlabel)) {
+ spin_unlock_irqrestore(&card->lock, flags);
+ callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data);
+ return;
+ }
+
+ card->current_tlabel = (card->current_tlabel + 1) & 0x1f;
+ card->tlabel_mask |= (1 << tlabel);
+
+ list_add_tail(&t->link, &card->transaction_list);
+
+ spin_unlock_irqrestore(&card->lock, flags);
+
+ /* Initialize rest of transaction, fill out packet and send it. */
+ t->node_id = node_id;
+ t->tlabel = tlabel;
+ t->callback = callback;
+ t->callback_data = callback_data;
+
+ fw_fill_packet(&t->packet, tcode, t->tlabel,
+ node_id, generation, speed, offset, payload, length);
+ t->packet.callback = transmit_complete_callback;
+
+ card->driver->send_request(card, &t->packet);
+}
+
+EXPORT_SYMBOL(fw_send_request);
+
+static void
+transmit_phy_packet_callback(struct fw_packet *packet,
+ struct fw_card *card, int status)
+{
+ kfree(packet);
+}
+
+static void send_phy_packet(struct fw_card *card, u32 data, int generation)
+{
+ struct fw_packet *packet;
+
+ packet = kzalloc(sizeof *packet, GFP_ATOMIC);
+ if (packet == NULL)
+ return;
+
+ packet->header[0] = data;
+ packet->header[1] = ~data;
+ packet->header_length = 8;
+ packet->payload_length = 0;
+ packet->speed = SCODE_100;
+ packet->generation = generation;
+ packet->callback = transmit_phy_packet_callback;
+
+ card->driver->send_request(card, packet);
+}
+
+void fw_send_force_root(struct fw_card *card, int node_id, int generation)
+{
+ struct fw_phy_packet p;
+
+ p.quadlet = 0;
+ p.phy_config.identifier = PHY_PACKET_CONFIG;
+ p.phy_config.root_id = node_id;
+ p.phy_config.r = 1;
+ send_phy_packet(card, p.quadlet, generation);
+}
+
+void flush_transactions(struct fw_card *card, u32 timestamp)
+{
+ struct fw_transaction *t, *next;
+ LIST_HEAD(list);
+ unsigned long flags;
+
+ /* To avoid serving the transaction complete callback under
+ * the card lock, we first grab the card lock and filter out
+ * expired transactions into a local list. Then we just
+ * iterate through the local list and close those
+ * transactions. */
+ spin_lock_irqsave(&card->lock, flags);
+ list_for_each_entry_safe(t, next, &card->transaction_list, link) {
+ if (t->timestamp + 800 < timestamp ||
+ (timestamp < t->timestamp &&
+ t->timestamp + 800 < timestamp + 0x10000)) {
+ list_move_tail(&t->link, &list);
+ }
+ }
+ spin_unlock_irqrestore(&card->lock, flags);
+
+ list_for_each_entry_safe(t, next, &list, link)
+ close_transaction(t, card, RCODE_CANCELLED, NULL, 0);
+}
+
+static struct fw_address_handler *lookup_overlapping_address_handler(struct
+ list_head
+ *list,
+ unsigned
+ long long
+ offset,
+ size_t
+ length)
+{
+ struct fw_address_handler *handler;
+
+ list_for_each_entry(handler, list, link) {
+ if (handler->offset < offset + length &&
+ offset < handler->offset + handler->length)
+ return handler;
+ }
+
+ return NULL;
+}
+
+static struct fw_address_handler *lookup_enclosing_address_handler(struct
+ list_head
+ *list,
+ unsigned long
+ long offset,
+ size_t
+ length)
+{
+ struct fw_address_handler *handler;
+
+ list_for_each_entry(handler, list, link) {
+ if (handler->offset <= offset &&
+ offset + length <= handler->offset + handler->length)
+ return handler;
+ }
+
+ return NULL;
+}
+
+static DEFINE_SPINLOCK(address_handler_lock);
+static LIST_HEAD(address_handler_list);
+
+struct fw_address_region fw_low_memory_region =
+ { 0x000000000000ull, 0x000100000000ull };
+struct fw_address_region fw_high_memory_region =
+ { 0x000100000000ull, 0xffffe0000000ull };
+struct fw_address_region fw_private_region =
+ { 0xffffe0000000ull, 0xfffff0000000ull };
+struct fw_address_region fw_csr_region =
+ { 0xfffff0000000ULL, 0xfffff0000800ull };
+struct fw_address_region fw_unit_space_region =
+ { 0xfffff0000900ull, 0x1000000000000ull };
+
+EXPORT_SYMBOL(fw_low_memory_region);
+EXPORT_SYMBOL(fw_high_memory_region);
+EXPORT_SYMBOL(fw_private_region);
+EXPORT_SYMBOL(fw_csr_region);
+EXPORT_SYMBOL(fw_unit_space_region);
+
+/**
+ * Allocate a range of addresses in the node space of the OHCI
+ * controller. When a request is received that falls within the
+ * specified address range, the specified callback is invoked. The
+ * parameters passed to the callback give the details of the
+ * particular request
+ */
+
+int
+fw_core_add_address_handler(struct fw_address_handler *handler,
+ struct fw_address_region *region)
+{
+ struct fw_address_handler *other;
+ unsigned long flags;
+ int ret = -EBUSY;
+
+ spin_lock_irqsave(&address_handler_lock, flags);
+
+ handler->offset = region->start;
+ while (handler->offset + handler->length <= region->end) {
+ other =
+ lookup_overlapping_address_handler(&address_handler_list,
+ handler->offset,
+ handler->length);
+ if (other != NULL) {
+ handler->offset += other->length;
+ } else {
+ list_add_tail(&handler->link, &address_handler_list);
+ ret = 0;
+ break;
+ }
+ }
+
+ spin_unlock_irqrestore(&address_handler_lock, flags);
+
+ return ret;
+}
+
+EXPORT_SYMBOL(fw_core_add_address_handler);
+
+/**
+ * Deallocate a range of addresses allocated with fw_allocate. This
+ * will call the associated callback one last time with a the special
+ * tcode TCODE_DEALLOCATE, to let the client destroy the registered
+ * callback data. For convenience, the callback parameters offset and
+ * length are set to the start and the length respectively for the
+ * deallocated region, payload is set to NULL.
+ */
+
+void fw_core_remove_address_handler(struct fw_address_handler *handler)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&address_handler_lock, flags);
+ list_del(&handler->link);
+ spin_unlock_irqrestore(&address_handler_lock, flags);
+}
+
+EXPORT_SYMBOL(fw_core_remove_address_handler);
+
+struct fw_request {
+ struct fw_packet response;
+ int ack;
+ u32 length;
+ u32 data[0];
+};
+
+static void
+free_response_callback(struct fw_packet *packet,
+ struct fw_card *card, int status)
+{
+ struct fw_request *request;
+
+ request = container_of(packet, struct fw_request, response);
+ kfree(request);
+}
+
+static void
+fw_fill_response(struct fw_packet *response,
+ struct fw_packet_header *request, u32 * data, size_t length)
+{
+ struct fw_packet_header *header;
+
+ header = (struct fw_packet_header *)response->header;
+ header->response.priority = 0;
+ header->response.rt = RETRY_1;
+ header->response.tlabel = request->request.tlabel;
+ header->response.destination = request->request.source;
+ header->response.source = request->request.destination;
+ header->response.reserved0 = 0;
+ header->response.reserved1 = 0;
+
+ switch (request->request.tcode) {
+ case TCODE_WRITE_QUADLET_REQUEST:
+ case TCODE_WRITE_BLOCK_REQUEST:
+ header->write_response.tcode = TCODE_WRITE_RESPONSE;
+ response->header_length = sizeof header->write_response;
+ response->payload_length = 0;
+ break;
+
+ case TCODE_READ_QUADLET_REQUEST:
+ header->read_quadlet_response.tcode =
+ TCODE_READ_QUADLET_RESPONSE;
+ header->read_quadlet_response.data = 0;
+ response->header_length = sizeof header->read_quadlet_response;
+ response->payload_length = 0;
+ break;
+
+ case TCODE_READ_BLOCK_REQUEST:
+ case TCODE_LOCK_REQUEST:
+ header->block_response.tcode = request->request.tcode + 2;
+ header->block_response.data_length = length;
+ header->block_response.extended_tcode =
+ request->block_request.extended_tcode;
+ response->header_length = sizeof header->block_response;
+ response->payload = data;
+ response->payload_length = length;
+ break;
+
+ default:
+ BUG();
+ return;
+ }
+}
+
+static struct fw_request *allocate_request(struct fw_packet_header *header,
+ int ack, int speed, int timestamp,
+ int generation)
+{
+ struct fw_request *request;
+ u32 *data, length;
+
+ switch (header->request.tcode) {
+ case TCODE_WRITE_QUADLET_REQUEST:
+ data = &header->write_quadlet_request.data;
+ length = 4;
+ break;
+
+ case TCODE_WRITE_BLOCK_REQUEST:
+ data = header->write_block_request.data;
+ length = header->write_block_request.data_length;
+ break;
+
+ case TCODE_READ_QUADLET_REQUEST:
+ data = NULL;
+ length = 4;
+ break;
+
+ case TCODE_READ_BLOCK_REQUEST:
+ data = NULL;
+ length = header->read_block_request.data_length;
+ break;
+
+ case TCODE_LOCK_REQUEST:
+ data = header->lock_response.data;
+ length = header->lock_request.data_length;
+ break;
+
+ default:
+ BUG();
+ return NULL;
+ }
+
+ request = kmalloc(sizeof *request + length, GFP_ATOMIC);
+ if (request == NULL)
+ return NULL;
+
+ request->response.speed = speed;
+ request->response.timestamp = timestamp;
+ request->response.generation = generation;
+ request->response.callback = free_response_callback;
+ request->ack = ack;
+ request->length = length;
+ if (data)
+ memcpy(request->data, data, length);
+
+ fw_fill_response(&request->response, header, request->data, length);
+
+ return request;
+}
+
+void
+fw_send_response(struct fw_card *card, struct fw_request *request, int rcode)
+{
+ struct fw_packet_header *header;
+
+ /* Broadcast packets are reported as ACK_COMPLETE, so this
+ * check is sufficient to ensure we don't send response to
+ * broadcast packets or posted writes. */
+ if (request->ack != ACK_PENDING)
+ return;
+
+ header = (struct fw_packet_header *)request->response.header;
+
+ header->response.rcode = rcode;
+ if (rcode != RCODE_COMPLETE)
+ request->response.payload_length = 0;
+ else if (header->response.tcode == TCODE_READ_QUADLET_RESPONSE)
+ header->read_quadlet_response.data = request->data[0];
+
+ card->driver->send_response(card, &request->response);
+}
+
+EXPORT_SYMBOL(fw_send_response);
+
+void
+fw_core_handle_request(struct fw_card *card,
+ int speed, int ack, int timestamp,
+ int generation, u32 length, u32 * payload)
+{
+ struct fw_address_handler *handler;
+ struct fw_packet_header *header;
+ struct fw_request *request;
+ unsigned long long offset;
+ unsigned long flags;
+ int t;
+
+ if (length > 2048) {
+ /* FIXME: send error response. */
+ return;
+ }
+
+ header = (struct fw_packet_header *)payload;
+
+ if (ack != ACK_PENDING && ack != ACK_COMPLETE)
+ return;
+
+ t = (timestamp & 0x1fff) + 4000;
+ if (t >= 8000)
+ t = (timestamp & ~0x1fff) + 0x2000 + t - 8000;
+ else
+ t = (timestamp & ~0x1fff) + t;
+
+ request = allocate_request(header, ack, speed, t, generation);
+ if (request == NULL) {
+ /* FIXME: send statically allocated busy packet. */
+ return;
+ }
+
+ offset = ((unsigned long long)header->request.offset_high << 32) |
+ header->request.offset_low;
+
+ spin_lock_irqsave(&address_handler_lock, flags);
+ handler = lookup_enclosing_address_handler(&address_handler_list,
+ offset, request->length);
+ spin_unlock_irqrestore(&address_handler_lock, flags);
+
+ /* FIXME: lookup the fw_node corresponding to the sender of
+ * this request and pass that to the address handler instead
+ * of the node ID. We may also want to move the address
+ * allocations to fw_node so we only do this callback if the
+ * upper layers registered it for this node. */
+
+ if (handler == NULL)
+ fw_send_response(card, request, RCODE_ADDRESS_ERROR);
+ else
+ handler->address_callback(card, request,
+ header->request.tcode,
+ header->request.destination,
+ header->request.source,
+ generation, speed, offset,
+ request->data, request->length,
+ handler->callback_data);
+}
+
+EXPORT_SYMBOL(fw_core_handle_request);
+
+void
+fw_core_handle_response(struct fw_card *card,
+ int speed, int ack, int timestamp,
+ u32 length, u32 * response)
+{
+ struct fw_transaction *t;
+ struct fw_packet_header *packet;
+ u32 *data;
+ size_t data_length;
+
+ packet = (struct fw_packet_header *)response;
+ t = lookup_transaction(card,
+ packet->response.source,
+ packet->response.tlabel);
+ if (t == NULL) {
+ fw_notify("Unsolicited response\n");
+ return;
+ }
+
+ /* FIXME: sanity check packet, is length correct, does tcodes
+ * and addresses match. */
+
+ switch (packet->response.tcode) {
+ case TCODE_READ_QUADLET_RESPONSE:
+ data = (u32 *) & packet->read_quadlet_response.data;
+ data_length = 4;
+ break;
+
+ case TCODE_WRITE_RESPONSE:
+ data = NULL;
+ data_length = 0;
+ break;
+
+ case TCODE_READ_BLOCK_RESPONSE:
+ case TCODE_LOCK_RESPONSE:
+ data = packet->block_response.data;
+ data_length = packet->block_response.data_length;
+ break;
+
+ default:
+ /* Should never happen, this is just to shut up gcc. */
+ data = NULL;
+ data_length = 0;
+ break;
+ }
+
+ close_transaction(t, card, packet->response.rcode, data, data_length);
+}
+
+EXPORT_SYMBOL(fw_core_handle_response);
+
+MODULE_AUTHOR("Kristian Høgsberg <krh@bitplanet.net>");
+MODULE_DESCRIPTION("Core IEEE1394 transaction logic");
+MODULE_LICENSE("GPL");
+
+static u32 vendor_textual_descriptor_data[] = {
+ /* textual descriptor leaf () */
+ 0x00080000,
+ 0x00000000,
+ 0x00000000,
+ 0x4c696e75, /* L i n u */
+ 0x78204669, /* x F i */
+ 0x72657769, /* r e w i */
+ 0x72652028, /* r e ( */
+ 0x4a554a55, /* J U J U */
+ 0x29000000, /* ) */
+};
+
+static struct fw_descriptor vendor_textual_descriptor = {
+ .length = ARRAY_SIZE(vendor_textual_descriptor_data),
+ .key = 0x81000000,
+ .data = vendor_textual_descriptor_data
+};
+
+static int __init fw_core_init(void)
+{
+ int retval;
+
+ retval = bus_register(&fw_bus_type);
+ if (retval < 0) {
+ fw_error("failed to register fw bus");
+ return retval;
+ }
+
+ /* Add the vendor textual descriptor. */
+ fw_core_add_descriptor(&vendor_textual_descriptor);
+
+ fw_notify("Loaded fw-core driver.\n");
+
+ return 0;
+}
+
+static void __exit fw_core_cleanup(void)
+{
+ bus_unregister(&fw_bus_type);
+
+ fw_notify("Unloaded fw-core driver.\n");
+}
+
+module_init(fw_core_init);
+module_exit(fw_core_cleanup);
diff --git a/drivers/fw/fw-transaction.h b/drivers/fw/fw-transaction.h
new file mode 100644
index 0000000..17404e7
--- /dev/null
+++ b/drivers/fw/fw-transaction.h
@@ -0,0 +1,415 @@
+/* -*- c-basic-offset: 8 -*-
+ *
+ * fw-transaction.h - Header for IEEE1394 transaction logic
+ *
+ * Copyright (C) 2003 Kristian Høgsberg <krh@bitplanet.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __fw_core_h
+#define __fw_core_h
+
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/fs.h>
+
+#define TCODE_WRITE_QUADLET_REQUEST 0
+#define TCODE_WRITE_BLOCK_REQUEST 1
+#define TCODE_WRITE_RESPONSE 2
+#define TCODE_READ_QUADLET_REQUEST 4
+#define TCODE_READ_BLOCK_REQUEST 5
+#define TCODE_READ_QUADLET_RESPONSE 6
+#define TCODE_READ_BLOCK_RESPONSE 7
+#define TCODE_CYCLE_START 8
+#define TCODE_LOCK_REQUEST 9
+#define TCODE_STREAM_DATA 10
+#define TCODE_LOCK_RESPONSE 11
+
+/* Juju specific tcodes */
+#define TCODE_DEALLOCATE 0x10
+#define TCODE_LOCK_MASK_SWAP 0x11
+#define TCODE_LOCK_COMPARE_SWAP 0x12
+#define TCODE_LOCK_FETCH_ADD 0x13
+#define TCODE_LOCK_LITTLE_ADD 0x14
+#define TCODE_LOCK_BOUNDED_ADD 0x15
+#define TCODE_LOCK_WRAP_ADD 0x16
+#define TCODE_LOCK_VENDOR_SPECIFIC 0x17
+
+#define TCODE_IS_WRITE_REQUEST(tcode) ( ((tcode) & ~1) == 0 )
+#define TCODE_IS_READ_REQUEST(tcode) ( ((tcode) & ~1) == 4 )
+
+#define SCODE_100 0x0
+#define SCODE_200 0x1
+#define SCODE_400 0x2
+#define SCODE_BETA 0x3
+
+#define EXTCODE_MASK_SWAP 0x1
+#define EXTCODE_COMPARE_SWAP 0x2
+#define EXTCODE_FETCH_ADD 0x3
+#define EXTCODE_LITTLE_ADD 0x4
+#define EXTCODE_BOUNDED_ADD 0x5
+#define EXTCODE_WRAP_ADD 0x6
+
+#define ACK_COMPLETE 0x1
+#define ACK_PENDING 0x2
+#define ACK_BUSY_X 0x4
+#define ACK_BUSY_A 0x5
+#define ACK_BUSY_B 0x6
+#define ACK_DATA_ERROR 0xd
+#define ACK_TYPE_ERROR 0xe
+
+#define RCODE_COMPLETE 0x0
+#define RCODE_CONFLICT_ERROR 0x4
+#define RCODE_DATA_ERROR 0x5
+#define RCODE_TYPE_ERROR 0x6
+#define RCODE_ADDRESS_ERROR 0x7
+
+/* Juju specific rcodes */
+#define RCODE_SEND_ERROR 0x10
+#define RCODE_CANCELLED 0x11
+#define RCODE_BUSY 0x12
+
+#define RETRY_1 0x00
+#define RETRY_X 0x01
+#define RETRY_A 0x02
+#define RETRY_B 0x03
+
+#define LOCAL_BUS 0xffc0
+
+#define SELFID_PORT_CHILD 0x3
+#define SELFID_PORT_PARENT 0x2
+#define SELFID_PORT_NCONN 0x1
+#define SELFID_PORT_NONE 0x0
+
+#define PHY_PACKET_CONFIG 0x0
+#define PHY_PACKET_LINK_ON 0x1
+#define PHY_PACKET_SELF_ID 0x2
+
+#define fw_notify(s, args...) printk(KERN_NOTICE KBUILD_MODNAME ": " s, ## args)
+#define fw_error(s, args...) printk(KERN_ERR KBUILD_MODNAME ": " s, ## args)
+#define fw_debug(s, args...) printk(KERN_DEBUG KBUILD_MODNAME ": " s, ## args)
+
+static inline void
+fw_memcpy_from_be32(void *_dst, void *_src, size_t size)
+{
+ u32 *dst = _dst;
+ u32 *src = _src;
+ int i;
+
+ for (i = 0; i < size / 4; i++)
+ dst[i] = cpu_to_be32(src[i]);
+}
+
+static inline void
+fw_memcpy_to_be32(void *_dst, void *_src, size_t size)
+{
+ fw_memcpy_from_be32(_dst, _src, size);
+}
+
+struct fw_card;
+struct fw_packet;
+struct fw_node;
+struct fw_request;
+
+struct fw_descriptor {
+ struct list_head link;
+ size_t length;
+ u32 key;
+ u32 *data;
+};
+
+int fw_core_add_descriptor (struct fw_descriptor *desc);
+void fw_core_remove_descriptor (struct fw_descriptor *desc);
+
+typedef void (*fw_packet_callback_t) (struct fw_packet *packet,
+ struct fw_card *card, int status);
+
+typedef void (*fw_transaction_callback_t)(struct fw_card *card, int rcode,
+ u32 *payload,
+ size_t length,
+ void *callback_data);
+
+typedef void (*fw_address_callback_t)(struct fw_card *card,
+ struct fw_request *request,
+ int tcode, int destination, int source,
+ int generation, int speed,
+ unsigned long long offset,
+ u32 *payload, size_t length,
+ void *callback_data);
+
+typedef void (*fw_bus_reset_callback_t)(struct fw_card *handle,
+ int node_id, int generation,
+ u32 *self_ids,
+ int self_id_count,
+ void *callback_data);
+
+struct fw_packet {
+ int speed;
+ int generation;
+ u32 header[4];
+ size_t header_length;
+ u32 *payload;
+ size_t payload_length;
+ u32 timestamp;
+
+ dma_addr_t payload_bus;
+
+ /* This callback is called when the packet transmission has
+ * completed; for successful transmission, the status code is
+ * the ack received from the destination, otherwise it's a
+ * negative errno: ENOMEM, ESTALE, ETIMEDOUT, ENODEV, EIO.
+ * The callback can be called from tasklet context and thus
+ * must never block.
+ */
+ fw_packet_callback_t callback;
+ struct list_head link;
+};
+
+struct fw_transaction {
+ int node_id; /* The generation is implied; it is always the current. */
+ int tlabel;
+ int timestamp;
+ struct list_head link;
+
+ struct fw_packet packet;
+
+ /* The data passed to the callback is valid only during the
+ * callback. */
+ fw_transaction_callback_t callback;
+ void *callback_data;
+};
+
+extern inline struct fw_packet *
+fw_packet(struct list_head *l)
+{
+ return list_entry (l, struct fw_packet, link);
+}
+
+struct fw_address_handler {
+ u64 offset;
+ size_t length;
+ fw_address_callback_t address_callback;
+ void *callback_data;
+ struct list_head link;
+};
+
+
+struct fw_address_region {
+ u64 start;
+ u64 end;
+};
+
+extern struct fw_address_region fw_low_memory_region;
+extern struct fw_address_region fw_high_memory_region;
+extern struct fw_address_region fw_private_region;
+extern struct fw_address_region fw_csr_region;
+extern struct fw_address_region fw_unit_space_region;
+
+int fw_core_add_address_handler(struct fw_address_handler *handler,
+ struct fw_address_region *region);
+void fw_core_remove_address_handler(struct fw_address_handler *handler);
+void fw_send_response(struct fw_card *card,
+ struct fw_request *request, int rcode);
+
+extern struct bus_type fw_bus_type;
+
+struct fw_card {
+ struct fw_card_driver *driver;
+ struct device *device;
+
+ int node_id;
+ int generation;
+ /* This is the generation used for timestamping incoming requests. */
+ int request_generation;
+ int current_tlabel, tlabel_mask;
+ struct list_head transaction_list;
+ unsigned long long guid;
+ int max_receive;
+ int link_speed;
+ int config_rom_generation;
+
+ /* We need to store up to 4 self ID for a maximum of 63 devices. */
+ int self_id_count;
+ u32 self_ids[252];
+
+ spinlock_t lock; /* Take this lock when handling the lists in
+ * this struct. */
+ struct fw_node *local_node;
+ struct fw_node *root_node;
+ struct fw_node *irm_node;
+ int color;
+
+ int index;
+
+ struct device card_device;
+
+ struct list_head link;
+
+ /* Work struct for IRM duties. */
+ struct work_struct work;
+ int irm_retries;
+};
+
+struct fw_card *fw_card_get(struct fw_card *card);
+void fw_card_put(struct fw_card *card);
+
+/* The iso packet format allows for an immediate header/payload part
+ * stored in 'header' immediately after the packet info plus an
+ * indirect payload part that is pointer to by the 'payload' field.
+ * Applications can use one or the other or both to implement simple
+ * low-bandwidth streaming (e.g. audio) or more advanced
+ * scatter-gather streaming (e.g. assembling video frame automatically). */
+
+struct fw_iso_packet {
+ u16 payload_length; /* Length of indirect payload. */
+ u32 interrupt : 1; /* Generate interrupt on this packet */
+ u32 skip : 1; /* Set to not send packet at all. */
+ u32 tag : 2;
+ u32 sy : 4;
+ u32 header_length : 8; /* Length of immediate header. */
+ u32 header[0];
+};
+
+#define FW_ISO_CONTEXT_TRANSMIT 0
+#define FW_ISO_CONTEXT_RECEIVE 1
+
+struct fw_iso_context;
+
+typedef void (*fw_iso_callback_t) (struct fw_iso_context *context,
+ int status, u32 cycle, void *data);
+
+struct fw_iso_context {
+ struct fw_card *card;
+ int type;
+ int channel;
+ int speed;
+ fw_iso_callback_t callback;
+ void *callback_data;
+
+ void *buffer;
+ size_t buffer_size;
+ dma_addr_t *pages;
+ int page_count;
+};
+
+struct fw_iso_context *
+fw_iso_context_create(struct fw_card *card, int type,
+ size_t buffer_size,
+ fw_iso_callback_t callback,
+ void *callback_data);
+
+void
+fw_iso_context_destroy(struct fw_iso_context *ctx);
+
+void
+fw_iso_context_start(struct fw_iso_context *ctx,
+ int channel, int speed, int cycle);
+
+int
+fw_iso_context_queue(struct fw_iso_context *ctx,
+ struct fw_iso_packet *packet, void *payload);
+
+int
+fw_iso_context_send(struct fw_iso_context *ctx,
+ int channel, int speed, int cycle);
+
+struct fw_card_driver {
+ const char *name;
+
+ /* Enable the given card with the given initial config rom.
+ * This function is expected to activate the card, and either
+ * enable the PHY or set the link_on bit and initiate a bus
+ * reset. */
+ int (*enable) (struct fw_card *card, u32 *config_rom, size_t length);
+
+ int (*update_phy_reg) (struct fw_card *card, int address,
+ int clear_bits, int set_bits);
+
+ /* Update the config rom for an enabled card. This function
+ * should change the config rom that is presented on the bus
+ * an initiate a bus reset. */
+ int (*set_config_rom) (struct fw_card *card,
+ u32 *config_rom, size_t length);
+
+ void (*send_request) (struct fw_card *card, struct fw_packet *packet);
+ void (*send_response) (struct fw_card *card, struct fw_packet *packet);
+
+ /* Allow the specified node ID to do direct DMA out and in of
+ * host memory. The card will disable this for all node when
+ * a bus reset happens, so driver need to reenable this after
+ * bus reset. Returns 0 on success, -ENODEV if the card
+ * doesn't support this, -ESTALE if the generation doesn't
+ * match. */
+ int (*enable_phys_dma) (struct fw_card *card,
+ int node_id, int generation);
+
+ struct fw_iso_context *
+ (*allocate_iso_context)(struct fw_card *card, int type);
+ void (*free_iso_context)(struct fw_iso_context *ctx);
+
+ int (*send_iso)(struct fw_iso_context *ctx, s32 cycle);
+
+ int (*queue_iso)(struct fw_iso_context *ctx,
+ struct fw_iso_packet *packet, void *payload);
+};
+
+int
+fw_core_initiate_bus_reset(struct fw_card *card, int short_reset);
+
+void
+fw_send_request(struct fw_card *card, struct fw_transaction *t,
+ int tcode, int node_id, int generation, int speed,
+ unsigned long long offset,
+ u32 *payload, size_t length,
+ fw_transaction_callback_t callback, void *callback_data);
+
+void
+fw_send_force_root(struct fw_card *card, int node_id, int generation);
+
+/* Called by the topology code to inform the device code of node
+ * activity; found, lost, or updated nodes */
+void
+fw_node_event(struct fw_card *card, struct fw_node *node, int event);
+
+/* API used by card level drivers */
+
+/* Do we need phy speed here also? If we add more args, maybe we
+ should go back to struct fw_card_info. */
+int
+fw_core_add_card (struct fw_card *card, struct fw_card_driver *driver,
+ struct device *device,
+ u32 max_receive, u32 link_speed, u64 guid);
+
+void
+fw_core_remove_card(struct fw_card *card);
+
+void
+fw_core_handle_bus_reset(struct fw_card *card,
+ int node_id, int generation,
+ int self_id_count, u32 *self_ids);
+void
+fw_core_handle_request(struct fw_card *card,
+ int speed, int ack, int timestamp,
+ int generation,
+ u32 length, u32 *payload);
+void
+fw_core_handle_response(struct fw_card *card,
+ int speed, int ack, int timestamp,
+ u32 length, u32 *payload);
+
+
+#endif /* __fw_core_h */
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