firewire: Add core firewire stack.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>

drivers/Kconfig

@@ -30,6 +30,8 @@ source "drivers/md/Kconfig"
 
 source "drivers/message/fusion/Kconfig"
 
+source "drivers/firewire/Kconfig"
+
 source "drivers/ieee1394/Kconfig"
 
 source "drivers/message/i2o/Kconfig"

drivers/Makefile

@@ -36,6 +36,7 @@ obj-$(CONFIG_FC4)		+= fc4/
 obj-$(CONFIG_SCSI)		+= scsi/
 obj-$(CONFIG_ATA)		+= ata/
 obj-$(CONFIG_FUSION)		+= message/
+obj-$(CONFIG_FW)		+= firewire/
 obj-$(CONFIG_IEEE1394)		+= ieee1394/
 obj-y				+= cdrom/
 obj-y				+= auxdisplay/

drivers/firewire/Kconfig

+# -*- shell-script -*-
+
+menu "IEEE 1394 (FireWire) support (JUJU alternative stack)"
+
+config FW
+	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

drivers/firewire/Makefile

+#
+# 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) += fw-core.o

drivers/firewire/fw-iso.c

+/*						-*- c-basic-offset: 8 -*-
+ *
+ * fw-iso.c - Isochronous IO
+ * Copyright (C) 2006 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/dma-mapping.h>
+#include <linux/vmalloc.h>
+#include <linux/mm.h>
+
+#include "fw-transaction.h"
+#include "fw-topology.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);

drivers/firewire/fw-topology.h

+/*						-*- c-basic-offset: 8 -*-
+ *
+ * fw-topology.h -- Incremental bus scan, based on bus topology
+ *
+ * Copyright (C) 2003-2006 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
+
+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