Merge branch 'juju' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'juju' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: (138 commits) firewire: Convert OHCI driver to use standard goto unwinding for error handling. firewire: Always use parens with sizeof. firewire: Drop single buffer request support. firewire: Add a comment to describe why we split the sg list. firewire: Return SCSI_MLQUEUE_HOST_BUSY for out of memory cases in queuecommand. firewire: Handle the last few DMA mapping error cases. firewire: Allocate scsi_host up front and allocate the sbp2_device as hostdata. firewire: Provide module aliase for backwards compatibility. firewire: Add to fw-core-y instead of assigning fw-core-objs in Makefile. firewire: Break out shared IEEE1394 constant to separate header file. firewire: Use linux/*.h instead of asm/*.h header files. firewire: Uppercase most macro names. firewire: Coding style cleanup: no spaces after function names. firewire: Convert card_rwsem to a regular mutex. firewire: Clean up comment style. firewire: Use lib/ implementation of CRC ITU-T. CRC ITU-T V.41 firewire: Rename fw-device-cdev.c to fw-cdev.c and move header to include/linux. firewire: Future proof the iso ioctls by adding a handle for the iso context. firewire: Add read/write and size annotations to IOC numbers. ... Acked-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Linus Torvalds
commit
9b6a51746f
|
|
@ -36,6 +36,7 @@ obj-$(CONFIG_FC4) += fc4/
|
|||
obj-$(CONFIG_SCSI) += scsi/
|
||||
obj-$(CONFIG_ATA) += ata/
|
||||
obj-$(CONFIG_FUSION) += message/
|
||||
obj-$(CONFIG_FIREWIRE) += firewire/
|
||||
obj-$(CONFIG_IEEE1394) += ieee1394/
|
||||
obj-y += cdrom/
|
||||
obj-y += auxdisplay/
|
||||
|
|
|
|||
|
|
@ -0,0 +1,61 @@
|
|||
# -*- shell-script -*-
|
||||
|
||||
comment "An alternative FireWire stack is available with EXPERIMENTAL=y"
|
||||
depends on EXPERIMENTAL=n
|
||||
|
||||
config FIREWIRE
|
||||
tristate "IEEE 1394 (FireWire) support (JUJU alternative stack, experimental)"
|
||||
depends on EXPERIMENTAL
|
||||
select CRC_ITU_T
|
||||
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.
|
||||
|
||||
To compile this driver as a module, say M here: the module will be
|
||||
called fw-core.
|
||||
|
||||
This is the "JUJU" FireWire stack, an alternative implementation
|
||||
designed for robustness and simplicity. You can build either this
|
||||
stack, or the classic stack (the ieee1394 driver, ohci1394 etc.)
|
||||
or both.
|
||||
|
||||
config FIREWIRE_OHCI
|
||||
tristate "Support for OHCI FireWire host controllers"
|
||||
depends on PCI && FIREWIRE
|
||||
help
|
||||
Enable this driver if you have a FireWire controller based
|
||||
on the OHCI specification. For all practical purposes, this
|
||||
is the only chipset in use, so say Y here.
|
||||
|
||||
To compile this driver as a module, say M here: The module will be
|
||||
called fw-ohci.
|
||||
|
||||
If you also build ohci1394 of the classic IEEE 1394 driver stack,
|
||||
blacklist either ohci1394 or fw-ohci to let hotplug load the desired
|
||||
driver.
|
||||
|
||||
config FIREWIRE_SBP2
|
||||
tristate "Support for storage devices (SBP-2 protocol driver)"
|
||||
depends on FIREWIRE && SCSI
|
||||
help
|
||||
This option enables you to use SBP-2 devices connected to a
|
||||
FireWire bus. SBP-2 devices include storage devices like
|
||||
harddisks and DVD drives, also some other FireWire devices
|
||||
like scanners.
|
||||
|
||||
To compile this driver as a module, say M here: The module will be
|
||||
called fw-sbp2.
|
||||
|
||||
You should also enable support for disks, CD-ROMs, etc. in the SCSI
|
||||
configuration section.
|
||||
|
||||
If you also build sbp2 of the classic IEEE 1394 driver stack,
|
||||
blacklist either sbp2 or fw-sbp2 to let hotplug load the desired
|
||||
driver.
|
||||
|
||||
|
|
@ -0,0 +1,10 @@
|
|||
#
|
||||
# Makefile for the Linux IEEE 1394 implementation
|
||||
#
|
||||
|
||||
fw-core-y += fw-card.o fw-topology.o fw-transaction.o fw-iso.o \
|
||||
fw-device.o fw-cdev.o
|
||||
|
||||
obj-$(CONFIG_FIREWIRE) += fw-core.o
|
||||
obj-$(CONFIG_FIREWIRE_OHCI) += fw-ohci.o
|
||||
obj-$(CONFIG_FIREWIRE_SBP2) += fw-sbp2.o
|
||||
|
|
@ -0,0 +1,560 @@
|
|||
/*
|
||||
* Copyright (C) 2005-2007 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/module.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/crc-itu-t.h>
|
||||
#include "fw-transaction.h"
|
||||
#include "fw-topology.h"
|
||||
#include "fw-device.h"
|
||||
|
||||
int fw_compute_block_crc(u32 *block)
|
||||
{
|
||||
__be32 be32_block[256];
|
||||
int i, length;
|
||||
|
||||
length = (*block >> 16) & 0xff;
|
||||
for (i = 0; i < length; i++)
|
||||
be32_block[i] = cpu_to_be32(block[i + 1]);
|
||||
*block |= crc_itu_t(0, (u8 *) be32_block, length * 4);
|
||||
|
||||
return length;
|
||||
}
|
||||
|
||||
static DEFINE_MUTEX(card_mutex);
|
||||
static LIST_HEAD(card_list);
|
||||
|
||||
static LIST_HEAD(descriptor_list);
|
||||
static int descriptor_count;
|
||||
|
||||
#define BIB_CRC(v) ((v) << 0)
|
||||
#define BIB_CRC_LENGTH(v) ((v) << 16)
|
||||
#define BIB_INFO_LENGTH(v) ((v) << 24)
|
||||
|
||||
#define BIB_LINK_SPEED(v) ((v) << 0)
|
||||
#define BIB_GENERATION(v) ((v) << 4)
|
||||
#define BIB_MAX_ROM(v) ((v) << 8)
|
||||
#define BIB_MAX_RECEIVE(v) ((v) << 12)
|
||||
#define BIB_CYC_CLK_ACC(v) ((v) << 16)
|
||||
#define BIB_PMC ((1) << 27)
|
||||
#define BIB_BMC ((1) << 28)
|
||||
#define BIB_ISC ((1) << 29)
|
||||
#define BIB_CMC ((1) << 30)
|
||||
#define BIB_IMC ((1) << 31)
|
||||
|
||||
static u32 *
|
||||
generate_config_rom(struct fw_card *card, size_t *config_rom_length)
|
||||
{
|
||||
struct fw_descriptor *desc;
|
||||
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));
|
||||
config_rom[0] = BIB_CRC_LENGTH(4) | BIB_INFO_LENGTH(4) | BIB_CRC(0);
|
||||
config_rom[1] = 0x31333934;
|
||||
|
||||
config_rom[2] =
|
||||
BIB_LINK_SPEED(card->link_speed) |
|
||||
BIB_GENERATION(card->config_rom_generation++ % 14 + 2) |
|
||||
BIB_MAX_ROM(2) |
|
||||
BIB_MAX_RECEIVE(card->max_receive) |
|
||||
BIB_BMC | BIB_ISC | BIB_CMC | BIB_IMC;
|
||||
config_rom[3] = card->guid >> 32;
|
||||
config_rom[4] = card->guid;
|
||||
|
||||
/* Generate root directory. */
|
||||
i = 5;
|
||||
config_rom[i++] = 0;
|
||||
config_rom[i++] = 0x0c0083c0; /* node capabilities */
|
||||
j = i + descriptor_count;
|
||||
|
||||
/* Generate root directory entries for descriptors. */
|
||||
list_for_each_entry (desc, &descriptor_list, link) {
|
||||
if (desc->immediate > 0)
|
||||
config_rom[i++] = desc->immediate;
|
||||
config_rom[i] = desc->key | (j - i);
|
||||
i++;
|
||||
j += desc->length;
|
||||
}
|
||||
|
||||
/* Update root directory length. */
|
||||
config_rom[5] = (i - 5 - 1) << 16;
|
||||
|
||||
/* End of root directory, now copy in descriptors. */
|
||||
list_for_each_entry (desc, &descriptor_list, link) {
|
||||
memcpy(&config_rom[i], desc->data, desc->length * 4);
|
||||
i += desc->length;
|
||||
}
|
||||
|
||||
/* 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 < j; i += length + 1)
|
||||
length = fw_compute_block_crc(config_rom + i);
|
||||
|
||||
*config_rom_length = j;
|
||||
|
||||
return config_rom;
|
||||
}
|
||||
|
||||
static void
|
||||
update_config_roms(void)
|
||||
{
|
||||
struct fw_card *card;
|
||||
u32 *config_rom;
|
||||
size_t 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 -EINVAL;
|
||||
|
||||
mutex_lock(&card_mutex);
|
||||
|
||||
list_add_tail(&desc->link, &descriptor_list);
|
||||
descriptor_count++;
|
||||
if (desc->immediate > 0)
|
||||
descriptor_count++;
|
||||
update_config_roms();
|
||||
|
||||
mutex_unlock(&card_mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(fw_core_add_descriptor);
|
||||
|
||||
void
|
||||
fw_core_remove_descriptor(struct fw_descriptor *desc)
|
||||
{
|
||||
mutex_lock(&card_mutex);
|
||||
|
||||
list_del(&desc->link);
|
||||
descriptor_count--;
|
||||
if (desc->immediate > 0)
|
||||
descriptor_count--;
|
||||
update_config_roms();
|
||||
|
||||
mutex_unlock(&card_mutex);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_core_remove_descriptor);
|
||||
|
||||
static const char gap_count_table[] = {
|
||||
63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40
|
||||
};
|
||||
|
||||
struct bm_data {
|
||||
struct fw_transaction t;
|
||||
struct {
|
||||
__be32 arg;
|
||||
__be32 data;
|
||||
} lock;
|
||||
u32 old;
|
||||
int rcode;
|
||||
struct completion done;
|
||||
};
|
||||
|
||||
static void
|
||||
complete_bm_lock(struct fw_card *card, int rcode,
|
||||
void *payload, size_t length, void *data)
|
||||
{
|
||||
struct bm_data *bmd = data;
|
||||
|
||||
if (rcode == RCODE_COMPLETE)
|
||||
bmd->old = be32_to_cpu(*(__be32 *) payload);
|
||||
bmd->rcode = rcode;
|
||||
complete(&bmd->done);
|
||||
}
|
||||
|
||||
static void
|
||||
fw_card_bm_work(struct work_struct *work)
|
||||
{
|
||||
struct fw_card *card = container_of(work, struct fw_card, work.work);
|
||||
struct fw_device *root;
|
||||
struct bm_data bmd;
|
||||
unsigned long flags;
|
||||
int root_id, new_root_id, irm_id, gap_count, generation, grace;
|
||||
int do_reset = 0;
|
||||
|
||||
spin_lock_irqsave(&card->lock, flags);
|
||||
|
||||
generation = card->generation;
|
||||
root = card->root_node->data;
|
||||
root_id = card->root_node->node_id;
|
||||
grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 10));
|
||||
|
||||
if (card->bm_generation + 1 == generation ||
|
||||
(card->bm_generation != generation && grace)) {
|
||||
/*
|
||||
* This first step is to figure out who is IRM and
|
||||
* then try to become bus manager. If the IRM is not
|
||||
* well defined (e.g. does not have an active link
|
||||
* layer or does not responds to our lock request, we
|
||||
* will have to do a little vigilante bus management.
|
||||
* In that case, we do a goto into the gap count logic
|
||||
* so that when we do the reset, we still optimize the
|
||||
* gap count. That could well save a reset in the
|
||||
* next generation.
|
||||
*/
|
||||
|
||||
irm_id = card->irm_node->node_id;
|
||||
if (!card->irm_node->link_on) {
|
||||
new_root_id = card->local_node->node_id;
|
||||
fw_notify("IRM has link off, making local node (%02x) root.\n",
|
||||
new_root_id);
|
||||
goto pick_me;
|
||||
}
|
||||
|
||||
bmd.lock.arg = cpu_to_be32(0x3f);
|
||||
bmd.lock.data = cpu_to_be32(card->local_node->node_id);
|
||||
|
||||
spin_unlock_irqrestore(&card->lock, flags);
|
||||
|
||||
init_completion(&bmd.done);
|
||||
fw_send_request(card, &bmd.t, TCODE_LOCK_COMPARE_SWAP,
|
||||
irm_id, generation,
|
||||
SCODE_100, CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID,
|
||||
&bmd.lock, sizeof(bmd.lock),
|
||||
complete_bm_lock, &bmd);
|
||||
wait_for_completion(&bmd.done);
|
||||
|
||||
if (bmd.rcode == RCODE_GENERATION) {
|
||||
/*
|
||||
* Another bus reset happened. Just return,
|
||||
* the BM work has been rescheduled.
|
||||
*/
|
||||
return;
|
||||
}
|
||||
|
||||
if (bmd.rcode == RCODE_COMPLETE && bmd.old != 0x3f)
|
||||
/* Somebody else is BM, let them do the work. */
|
||||
return;
|
||||
|
||||
spin_lock_irqsave(&card->lock, flags);
|
||||
if (bmd.rcode != RCODE_COMPLETE) {
|
||||
/*
|
||||
* The lock request failed, maybe the IRM
|
||||
* isn't really IRM capable after all. Let's
|
||||
* do a bus reset and pick the local node as
|
||||
* root, and thus, IRM.
|
||||
*/
|
||||
new_root_id = card->local_node->node_id;
|
||||
fw_notify("BM lock failed, making local node (%02x) root.\n",
|
||||
new_root_id);
|
||||
goto pick_me;
|
||||
}
|
||||
} else if (card->bm_generation != generation) {
|
||||
/*
|
||||
* OK, we weren't BM in the last generation, and it's
|
||||
* less than 100ms since last bus reset. Reschedule
|
||||
* this task 100ms from now.
|
||||
*/
|
||||
spin_unlock_irqrestore(&card->lock, flags);
|
||||
schedule_delayed_work(&card->work, DIV_ROUND_UP(HZ, 10));
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* We're bus manager for this generation, so next step is to
|
||||
* make sure we have an active cycle master and do gap count
|
||||
* optimization.
|
||||
*/
|
||||
card->bm_generation = generation;
|
||||
|
||||
if (root == NULL) {
|
||||
/*
|
||||
* Either link_on is false, or we failed to read the
|
||||
* config rom. In either case, pick another root.
|
||||
*/
|
||||
new_root_id = card->local_node->node_id;
|
||||
} else if (atomic_read(&root->state) != FW_DEVICE_RUNNING) {
|
||||
/*
|
||||
* If we haven't probed this device yet, bail out now
|
||||
* and let's try again once that's done.
|
||||
*/
|
||||
spin_unlock_irqrestore(&card->lock, flags);
|
||||
return;
|
||||
} else if (root->config_rom[2] & BIB_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.
|
||||
*/
|
||||
new_root_id = root_id;
|
||||
} else {
|
||||
/*
|
||||
* Current root has an active link layer and we
|
||||
* successfully read the config rom, but it's not
|
||||
* cycle master capable.
|
||||
*/
|
||||
new_root_id = card->local_node->node_id;
|
||||
}
|
||||
|
||||
pick_me:
|
||||
/* Now figure out what gap count to set. */
|
||||
if (card->topology_type == FW_TOPOLOGY_A &&
|
||||
card->root_node->max_hops < ARRAY_SIZE(gap_count_table))
|
||||
gap_count = gap_count_table[card->root_node->max_hops];
|
||||
else
|
||||
gap_count = 63;
|
||||
|
||||
/*
|
||||
* Finally, figure out if we should do a reset or not. If we've
|
||||
* done less that 5 resets with the same physical topology and we
|
||||
* have either a new root or a new gap count setting, let's do it.
|
||||
*/
|
||||
|
||||
if (card->bm_retries++ < 5 &&
|
||||
(card->gap_count != gap_count || new_root_id != root_id))
|
||||
do_reset = 1;
|
||||
|
||||
spin_unlock_irqrestore(&card->lock, flags);
|
||||
|
||||
if (do_reset) {
|
||||
fw_notify("phy config: card %d, new root=%x, gap_count=%d\n",
|
||||
card->index, new_root_id, gap_count);
|
||||
fw_send_phy_config(card, new_root_id, generation, gap_count);
|
||||
fw_core_initiate_bus_reset(card, 1);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
flush_timer_callback(unsigned long data)
|
||||
{
|
||||
struct fw_card *card = (struct fw_card *)data;
|
||||
|
||||
fw_flush_transactions(card);
|
||||
}
|
||||
|
||||
void
|
||||
fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver,
|
||||
struct device *device)
|
||||
{
|
||||
static atomic_t index = ATOMIC_INIT(-1);
|
||||
|
||||
kref_init(&card->kref);
|
||||
card->index = atomic_inc_return(&index);
|
||||
card->driver = driver;
|
||||
card->device = device;
|
||||
card->current_tlabel = 0;
|
||||
card->tlabel_mask = 0;
|
||||
card->color = 0;
|
||||
|
||||
INIT_LIST_HEAD(&card->transaction_list);
|
||||
spin_lock_init(&card->lock);
|
||||
setup_timer(&card->flush_timer,
|
||||
flush_timer_callback, (unsigned long)card);
|
||||
|
||||
card->local_node = NULL;
|
||||
|
||||
INIT_DELAYED_WORK(&card->work, fw_card_bm_work);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_card_initialize);
|
||||
|
||||
int
|
||||
fw_card_add(struct fw_card *card,
|
||||
u32 max_receive, u32 link_speed, u64 guid)
|
||||
{
|
||||
u32 *config_rom;
|
||||
size_t length;
|
||||
|
||||
card->max_receive = max_receive;
|
||||
card->link_speed = link_speed;
|
||||
card->guid = guid;
|
||||
|
||||
/* Activate link_on bit and contender bit in our self ID packets.*/
|
||||
if (card->driver->update_phy_reg(card, 4, 0,
|
||||
PHY_LINK_ACTIVE | PHY_CONTENDER) < 0)
|
||||
return -EIO;
|
||||
|
||||
/*
|
||||
* 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);
|
||||
|
||||
mutex_lock(&card_mutex);
|
||||
config_rom = generate_config_rom(card, &length);
|
||||
list_add_tail(&card->link, &card_list);
|
||||
mutex_unlock(&card_mutex);
|
||||
|
||||
return card->driver->enable(card, config_rom, length);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_card_add);
|
||||
|
||||
|
||||
/*
|
||||
* 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_cancel_packet(struct fw_card *card, struct fw_packet *packet)
|
||||
{
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
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,
|
||||
.cancel_packet = dummy_cancel_packet,
|
||||
.send_response = dummy_send_response,
|
||||
.enable_phys_dma = dummy_enable_phys_dma,
|
||||
};
|
||||
|
||||
void
|
||||
fw_core_remove_card(struct fw_card *card)
|
||||
{
|
||||
card->driver->update_phy_reg(card, 4,
|
||||
PHY_LINK_ACTIVE | PHY_CONTENDER, 0);
|
||||
fw_core_initiate_bus_reset(card, 1);
|
||||
|
||||
mutex_lock(&card_mutex);
|
||||
list_del(&card->link);
|
||||
mutex_unlock(&card_mutex);
|
||||
|
||||
/* Set up the dummy driver. */
|
||||
card->driver = &dummy_driver;
|
||||
|
||||
fw_flush_transactions(card);
|
||||
|
||||
fw_destroy_nodes(card);
|
||||
|
||||
fw_card_put(card);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_core_remove_card);
|
||||
|
||||
struct fw_card *
|
||||
fw_card_get(struct fw_card *card)
|
||||
{
|
||||
kref_get(&card->kref);
|
||||
|
||||
return card;
|
||||
}
|
||||
EXPORT_SYMBOL(fw_card_get);
|
||||
|
||||
static void
|
||||
release_card(struct kref *kref)
|
||||
{
|
||||
struct fw_card *card = container_of(kref, struct fw_card, kref);
|
||||
|
||||
kfree(card);
|
||||
}
|
||||
|
||||
/*
|
||||
* 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)
|
||||
{
|
||||
kref_put(&card->kref, release_card);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_card_put);
|
||||
|
||||
int
|
||||
fw_core_initiate_bus_reset(struct fw_card *card, int short_reset)
|
||||
{
|
||||
int reg = short_reset ? 5 : 1;
|
||||
int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET;
|
||||
|
||||
return card->driver->update_phy_reg(card, reg, 0, bit);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_core_initiate_bus_reset);
|
||||
|
|
@ -0,0 +1,961 @@
|
|||
/*
|
||||
* Char device for device raw access
|
||||
*
|
||||
* Copyright (C) 2005-2007 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/module.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/wait.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/vmalloc.h>
|
||||
#include <linux/poll.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/idr.h>
|
||||
#include <linux/compat.h>
|
||||
#include <linux/firewire-cdev.h>
|
||||
#include <asm/uaccess.h>
|
||||
#include "fw-transaction.h"
|
||||
#include "fw-topology.h"
|
||||
#include "fw-device.h"
|
||||
|
||||
struct client;
|
||||
struct client_resource {
|
||||
struct list_head link;
|
||||
void (*release)(struct client *client, struct client_resource *r);
|
||||
u32 handle;
|
||||
};
|
||||
|
||||
/*
|
||||
* dequeue_event() just kfree()'s the event, so the event has to be
|
||||
* the first field in the struct.
|
||||
*/
|
||||
|
||||
struct event {
|
||||
struct { void *data; size_t size; } v[2];
|
||||
struct list_head link;
|
||||
};
|
||||
|
||||
struct bus_reset {
|
||||
struct event event;
|
||||
struct fw_cdev_event_bus_reset reset;
|
||||
};
|
||||
|
||||
struct response {
|
||||
struct event event;
|
||||
struct fw_transaction transaction;
|
||||
struct client *client;
|
||||
struct client_resource resource;
|
||||
struct fw_cdev_event_response response;
|
||||
};
|
||||
|
||||
struct iso_interrupt {
|
||||
struct event event;
|
||||
struct fw_cdev_event_iso_interrupt interrupt;
|
||||
};
|
||||
|
||||
struct client {
|
||||
u32 version;
|
||||
struct fw_device *device;
|
||||
spinlock_t lock;
|
||||
u32 resource_handle;
|
||||
struct list_head resource_list;
|
||||
struct list_head event_list;
|
||||
wait_queue_head_t wait;
|
||||
u64 bus_reset_closure;
|
||||
|
||||
struct fw_iso_context *iso_context;
|
||||
u64 iso_closure;
|
||||
struct fw_iso_buffer buffer;
|
||||
unsigned long vm_start;
|
||||
|
||||
struct list_head link;
|
||||
};
|
||||
|
||||
static inline void __user *
|
||||
u64_to_uptr(__u64 value)
|
||||
{
|
||||
return (void __user *)(unsigned long)value;
|
||||
}
|
||||
|
||||
static inline __u64
|
||||
uptr_to_u64(void __user *ptr)
|
||||
{
|
||||
return (__u64)(unsigned long)ptr;
|
||||
}
|
||||
|
||||
static int fw_device_op_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
struct fw_device *device;
|
||||
struct client *client;
|
||||
unsigned long flags;
|
||||
|
||||
device = fw_device_from_devt(inode->i_rdev);
|
||||
if (device == NULL)
|
||||
return -ENODEV;
|
||||
|
||||
client = kzalloc(sizeof(*client), GFP_KERNEL);
|
||||
if (client == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
client->device = fw_device_get(device);
|
||||
INIT_LIST_HEAD(&client->event_list);
|
||||
INIT_LIST_HEAD(&client->resource_list);
|
||||
spin_lock_init(&client->lock);
|
||||
init_waitqueue_head(&client->wait);
|
||||
|
||||
file->private_data = client;
|
||||
|
||||
spin_lock_irqsave(&device->card->lock, flags);
|
||||
list_add_tail(&client->link, &device->client_list);
|
||||
spin_unlock_irqrestore(&device->card->lock, flags);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void queue_event(struct client *client, struct event *event,
|
||||
void *data0, size_t size0, void *data1, size_t size1)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
event->v[0].data = data0;
|
||||
event->v[0].size = size0;
|
||||
event->v[1].data = data1;
|
||||
event->v[1].size = size1;
|
||||
|
||||
spin_lock_irqsave(&client->lock, flags);
|
||||
|
||||
list_add_tail(&event->link, &client->event_list);
|
||||
wake_up_interruptible(&client->wait);
|
||||
|
||||
spin_unlock_irqrestore(&client->lock, flags);
|
||||
}
|
||||
|
||||
static int
|
||||
dequeue_event(struct client *client, char __user *buffer, size_t count)
|
||||
{
|
||||
unsigned long flags;
|
||||
struct event *event;
|
||||
size_t size, total;
|
||||
int i, retval;
|
||||
|
||||
retval = wait_event_interruptible(client->wait,
|
||||
!list_empty(&client->event_list) ||
|
||||
fw_device_is_shutdown(client->device));
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
|
||||
if (list_empty(&client->event_list) &&
|
||||
fw_device_is_shutdown(client->device))
|
||||
return -ENODEV;
|
||||
|
||||
spin_lock_irqsave(&client->lock, flags);
|
||||
event = container_of(client->event_list.next, struct event, link);
|
||||
list_del(&event->link);
|
||||
spin_unlock_irqrestore(&client->lock, flags);
|
||||
|
||||
total = 0;
|
||||
for (i = 0; i < ARRAY_SIZE(event->v) && total < count; i++) {
|
||||
size = min(event->v[i].size, count - total);
|
||||
if (copy_to_user(buffer + total, event->v[i].data, size)) {
|
||||
retval = -EFAULT;
|
||||
goto out;
|
||||
}
|
||||
total += size;
|
||||
}
|
||||
retval = total;
|
||||
|
||||
out:
|
||||
kfree(event);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
fw_device_op_read(struct file *file,
|
||||
char __user *buffer, size_t count, loff_t *offset)
|
||||
{
|
||||
struct client *client = file->private_data;
|
||||
|
||||
return dequeue_event(client, buffer, count);
|
||||
}
|
||||
|
||||
static void
|
||||
fill_bus_reset_event(struct fw_cdev_event_bus_reset *event,
|
||||
struct client *client)
|
||||
{
|
||||
struct fw_card *card = client->device->card;
|
||||
|
||||
event->closure = client->bus_reset_closure;
|
||||
event->type = FW_CDEV_EVENT_BUS_RESET;
|
||||
event->node_id = client->device->node_id;
|
||||
event->local_node_id = card->local_node->node_id;
|
||||
event->bm_node_id = 0; /* FIXME: We don't track the BM. */
|
||||
event->irm_node_id = card->irm_node->node_id;
|
||||
event->root_node_id = card->root_node->node_id;
|
||||
event->generation = card->generation;
|
||||
}
|
||||
|
||||
static void
|
||||
for_each_client(struct fw_device *device,
|
||||
void (*callback)(struct client *client))
|
||||
{
|
||||
struct fw_card *card = device->card;
|
||||
struct client *c;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&card->lock, flags);
|
||||
|
||||
list_for_each_entry(c, &device->client_list, link)
|
||||
callback(c);
|
||||
|
||||
spin_unlock_irqrestore(&card->lock, flags);
|
||||
}
|
||||
|
||||
static void
|
||||
queue_bus_reset_event(struct client *client)
|
||||
{
|
||||
struct bus_reset *bus_reset;
|
||||
|
||||
bus_reset = kzalloc(sizeof(*bus_reset), GFP_ATOMIC);
|
||||
if (bus_reset == NULL) {
|
||||
fw_notify("Out of memory when allocating bus reset event\n");
|
||||
return;
|
||||
}
|
||||
|
||||
fill_bus_reset_event(&bus_reset->reset, client);
|
||||
|
||||
queue_event(client, &bus_reset->event,
|
||||
&bus_reset->reset, sizeof(bus_reset->reset), NULL, 0);
|
||||
}
|
||||
|
||||
void fw_device_cdev_update(struct fw_device *device)
|
||||
{
|
||||
for_each_client(device, queue_bus_reset_event);
|
||||
}
|
||||
|
||||
static void wake_up_client(struct client *client)
|
||||
{
|
||||
wake_up_interruptible(&client->wait);
|
||||
}
|
||||
|
||||
void fw_device_cdev_remove(struct fw_device *device)
|
||||
{
|
||||
for_each_client(device, wake_up_client);
|
||||
}
|
||||
|
||||
static int ioctl_get_info(struct client *client, void *buffer)
|
||||
{
|
||||
struct fw_cdev_get_info *get_info = buffer;
|
||||
struct fw_cdev_event_bus_reset bus_reset;
|
||||
|
||||
client->version = get_info->version;
|
||||
get_info->version = FW_CDEV_VERSION;
|
||||
|
||||
if (get_info->rom != 0) {
|
||||
void __user *uptr = u64_to_uptr(get_info->rom);
|
||||
size_t want = get_info->rom_length;
|
||||
size_t have = client->device->config_rom_length * 4;
|
||||
|
||||
if (copy_to_user(uptr, client->device->config_rom,
|
||||
min(want, have)))
|
||||
return -EFAULT;
|
||||
}
|
||||
get_info->rom_length = client->device->config_rom_length * 4;
|
||||
|
||||
client->bus_reset_closure = get_info->bus_reset_closure;
|
||||
if (get_info->bus_reset != 0) {
|
||||
void __user *uptr = u64_to_uptr(get_info->bus_reset);
|
||||
|
||||
fill_bus_reset_event(&bus_reset, client);
|
||||
if (copy_to_user(uptr, &bus_reset, sizeof(bus_reset)))
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
get_info->card = client->device->card->index;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
add_client_resource(struct client *client, struct client_resource *resource)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&client->lock, flags);
|
||||
list_add_tail(&resource->link, &client->resource_list);
|
||||
resource->handle = client->resource_handle++;
|
||||
spin_unlock_irqrestore(&client->lock, flags);
|
||||
}
|
||||
|
||||
static int
|
||||
release_client_resource(struct client *client, u32 handle,
|
||||
struct client_resource **resource)
|
||||
{
|
||||
struct client_resource *r;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&client->lock, flags);
|
||||
list_for_each_entry(r, &client->resource_list, link) {
|
||||
if (r->handle == handle) {
|
||||
list_del(&r->link);
|
||||
break;
|
||||
}
|
||||
}
|
||||
spin_unlock_irqrestore(&client->lock, flags);
|
||||
|
||||
if (&r->link == &client->resource_list)
|
||||
return -EINVAL;
|
||||
|
||||
if (resource)
|
||||
*resource = r;
|
||||
else
|
||||
r->release(client, r);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
release_transaction(struct client *client, struct client_resource *resource)
|
||||
{
|
||||
struct response *response =
|
||||
container_of(resource, struct response, resource);
|
||||
|
||||
fw_cancel_transaction(client->device->card, &response->transaction);
|
||||
}
|
||||
|
||||
static void
|
||||
complete_transaction(struct fw_card *card, int rcode,
|
||||
void *payload, size_t length, void *data)
|
||||
{
|
||||
struct response *response = data;
|
||||
struct client *client = response->client;
|
||||
unsigned long flags;
|
||||
|
||||
if (length < response->response.length)
|
||||
response->response.length = length;
|
||||
if (rcode == RCODE_COMPLETE)
|
||||
memcpy(response->response.data, payload,
|
||||
response->response.length);
|
||||
|
||||
spin_lock_irqsave(&client->lock, flags);
|
||||
list_del(&response->resource.link);
|
||||
spin_unlock_irqrestore(&client->lock, flags);
|
||||
|
||||
response->response.type = FW_CDEV_EVENT_RESPONSE;
|
||||
response->response.rcode = rcode;
|
||||
queue_event(client, &response->event,
|
||||
&response->response, sizeof(response->response),
|
||||
response->response.data, response->response.length);
|
||||
}
|
||||
|
||||
static ssize_t ioctl_send_request(struct client *client, void *buffer)
|
||||
{
|
||||
struct fw_device *device = client->device;
|
||||
struct fw_cdev_send_request *request = buffer;
|
||||
struct response *response;
|
||||
|
||||
/* What is the biggest size we'll accept, really? */
|
||||
if (request->length > 4096)
|
||||
return -EINVAL;
|
||||
|
||||
response = kmalloc(sizeof(*response) + request->length, GFP_KERNEL);
|
||||
if (response == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
response->client = client;
|
||||
response->response.length = request->length;
|
||||
response->response.closure = request->closure;
|
||||
|
||||
if (request->data &&
|
||||
copy_from_user(response->response.data,
|
||||
u64_to_uptr(request->data), request->length)) {
|
||||
kfree(response);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
response->resource.release = release_transaction;
|
||||
add_client_resource(client, &response->resource);
|
||||
|
||||
fw_send_request(device->card, &response->transaction,
|
||||
request->tcode & 0x1f,
|
||||
device->node->node_id,
|
||||
request->generation,
|
||||
device->node->max_speed,
|
||||
request->offset,
|
||||
response->response.data, request->length,
|
||||
complete_transaction, response);
|
||||
|
||||
if (request->data)
|
||||
return sizeof(request) + request->length;
|
||||
else
|
||||
return sizeof(request);
|
||||
}
|
||||
|
||||
struct address_handler {
|
||||
struct fw_address_handler handler;
|
||||
__u64 closure;
|
||||
struct client *client;
|
||||
struct client_resource resource;
|
||||
};
|
||||
|
||||
struct request {
|
||||
struct fw_request *request;
|
||||
void *data;
|
||||
size_t length;
|
||||
struct client_resource resource;
|
||||
};
|
||||
|
||||
struct request_event {
|
||||
struct event event;
|
||||
struct fw_cdev_event_request request;
|
||||
};
|
||||
|
||||
static void
|
||||
release_request(struct client *client, struct client_resource *resource)
|
||||
{
|
||||
struct request *request =
|
||||
container_of(resource, struct request, resource);
|
||||
|
||||
fw_send_response(client->device->card, request->request,
|
||||
RCODE_CONFLICT_ERROR);
|
||||
kfree(request);
|
||||
}
|
||||
|
||||
static void
|
||||
handle_request(struct fw_card *card, struct fw_request *r,
|
||||
int tcode, int destination, int source,
|
||||
int generation, int speed,
|
||||
unsigned long long offset,
|
||||
void *payload, size_t length, void *callback_data)
|
||||
{
|
||||
struct address_handler *handler = callback_data;
|
||||
struct request *request;
|
||||
struct request_event *e;
|
||||
struct client *client = handler->client;
|
||||
|
||||
request = kmalloc(sizeof(*request), GFP_ATOMIC);
|
||||
e = kmalloc(sizeof(*e), GFP_ATOMIC);
|
||||
if (request == NULL || e == NULL) {
|
||||
kfree(request);
|
||||
kfree(e);
|
||||
fw_send_response(card, r, RCODE_CONFLICT_ERROR);
|
||||
return;
|
||||
}
|
||||
|
||||
request->request = r;
|
||||
request->data = payload;
|
||||
request->length = length;
|
||||
|
||||
request->resource.release = release_request;
|
||||
add_client_resource(client, &request->resource);
|
||||
|
||||
e->request.type = FW_CDEV_EVENT_REQUEST;
|
||||
e->request.tcode = tcode;
|
||||
e->request.offset = offset;
|
||||
e->request.length = length;
|
||||
e->request.handle = request->resource.handle;
|
||||
e->request.closure = handler->closure;
|
||||
|
||||
queue_event(client, &e->event,
|
||||
&e->request, sizeof(e->request), payload, length);
|
||||
}
|
||||
|
||||
static void
|
||||
release_address_handler(struct client *client,
|
||||
struct client_resource *resource)
|
||||
{
|
||||
struct address_handler *handler =
|
||||
container_of(resource, struct address_handler, resource);
|
||||
|
||||
fw_core_remove_address_handler(&handler->handler);
|
||||
kfree(handler);
|
||||
}
|
||||
|
||||
static int ioctl_allocate(struct client *client, void *buffer)
|
||||
{
|
||||
struct fw_cdev_allocate *request = buffer;
|
||||
struct address_handler *handler;
|
||||
struct fw_address_region region;
|
||||
|
||||
handler = kmalloc(sizeof(*handler), GFP_KERNEL);
|
||||
if (handler == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
region.start = request->offset;
|
||||
region.end = request->offset + request->length;
|
||||
handler->handler.length = request->length;
|
||||
handler->handler.address_callback = handle_request;
|
||||
handler->handler.callback_data = handler;
|
||||
handler->closure = request->closure;
|
||||
handler->client = client;
|
||||
|
||||
if (fw_core_add_address_handler(&handler->handler, ®ion) < 0) {
|
||||
kfree(handler);
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
handler->resource.release = release_address_handler;
|
||||
add_client_resource(client, &handler->resource);
|
||||
request->handle = handler->resource.handle;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ioctl_deallocate(struct client *client, void *buffer)
|
||||
{
|
||||
struct fw_cdev_deallocate *request = buffer;
|
||||
|
||||
return release_client_resource(client, request->handle, NULL);
|
||||
}
|
||||
|
||||
static int ioctl_send_response(struct client *client, void *buffer)
|
||||
{
|
||||
struct fw_cdev_send_response *request = buffer;
|
||||
struct client_resource *resource;
|
||||
struct request *r;
|
||||
|
||||
if (release_client_resource(client, request->handle, &resource) < 0)
|
||||
return -EINVAL;
|
||||
r = container_of(resource, struct request, resource);
|
||||
if (request->length < r->length)
|
||||
r->length = request->length;
|
||||
if (copy_from_user(r->data, u64_to_uptr(request->data), r->length))
|
||||
return -EFAULT;
|
||||
|
||||
fw_send_response(client->device->card, r->request, request->rcode);
|
||||
kfree(r);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ioctl_initiate_bus_reset(struct client *client, void *buffer)
|
||||
{
|
||||
struct fw_cdev_initiate_bus_reset *request = buffer;
|
||||
int short_reset;
|
||||
|
||||
short_reset = (request->type == FW_CDEV_SHORT_RESET);
|
||||
|
||||
return fw_core_initiate_bus_reset(client->device->card, short_reset);
|
||||
}
|
||||
|
||||
struct descriptor {
|
||||
struct fw_descriptor d;
|
||||
struct client_resource resource;
|
||||
u32 data[0];
|
||||
};
|
||||
|
||||
static void release_descriptor(struct client *client,
|
||||
struct client_resource *resource)
|
||||
{
|
||||
struct descriptor *descriptor =
|
||||
container_of(resource, struct descriptor, resource);
|
||||
|
||||
fw_core_remove_descriptor(&descriptor->d);
|
||||
kfree(descriptor);
|
||||
}
|
||||
|
||||
static int ioctl_add_descriptor(struct client *client, void *buffer)
|
||||
{
|
||||
struct fw_cdev_add_descriptor *request = buffer;
|
||||
struct descriptor *descriptor;
|
||||
int retval;
|
||||
|
||||
if (request->length > 256)
|
||||
return -EINVAL;
|
||||
|
||||
descriptor =
|
||||
kmalloc(sizeof(*descriptor) + request->length * 4, GFP_KERNEL);
|
||||
if (descriptor == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
if (copy_from_user(descriptor->data,
|
||||
u64_to_uptr(request->data), request->length * 4)) {
|
||||
kfree(descriptor);
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
descriptor->d.length = request->length;
|
||||
descriptor->d.immediate = request->immediate;
|
||||
descriptor->d.key = request->key;
|
||||
descriptor->d.data = descriptor->data;
|
||||
|
||||
retval = fw_core_add_descriptor(&descriptor->d);
|
||||
if (retval < 0) {
|
||||
kfree(descriptor);
|
||||
return retval;
|
||||
}
|
||||
|
||||
descriptor->resource.release = release_descriptor;
|
||||
add_client_resource(client, &descriptor->resource);
|
||||
request->handle = descriptor->resource.handle;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ioctl_remove_descriptor(struct client *client, void *buffer)
|
||||
{
|
||||
struct fw_cdev_remove_descriptor *request = buffer;
|
||||
|
||||
return release_client_resource(client, request->handle, NULL);
|
||||
}
|
||||
|
||||
static void
|
||||
iso_callback(struct fw_iso_context *context, u32 cycle,
|
||||
size_t header_length, void *header, void *data)
|
||||
{
|
||||
struct client *client = data;
|
||||
struct iso_interrupt *interrupt;
|
||||
|
||||
interrupt = kzalloc(sizeof(*interrupt) + header_length, GFP_ATOMIC);
|
||||
if (interrupt == NULL)
|
||||
return;
|
||||
|
||||
interrupt->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
|
||||
interrupt->interrupt.closure = client->iso_closure;
|
||||
interrupt->interrupt.cycle = cycle;
|
||||
interrupt->interrupt.header_length = header_length;
|
||||
memcpy(interrupt->interrupt.header, header, header_length);
|
||||
queue_event(client, &interrupt->event,
|
||||
&interrupt->interrupt,
|
||||
sizeof(interrupt->interrupt) + header_length, NULL, 0);
|
||||
}
|
||||
|
||||
static int ioctl_create_iso_context(struct client *client, void *buffer)
|
||||
{
|
||||
struct fw_cdev_create_iso_context *request = buffer;
|
||||
|
||||
if (request->channel > 63)
|
||||
return -EINVAL;
|
||||
|
||||
switch (request->type) {
|
||||
case FW_ISO_CONTEXT_RECEIVE:
|
||||
if (request->header_size < 4 || (request->header_size & 3))
|
||||
return -EINVAL;
|
||||
|
||||
break;
|
||||
|
||||
case FW_ISO_CONTEXT_TRANSMIT:
|
||||
if (request->speed > SCODE_3200)
|
||||
return -EINVAL;
|
||||
|
||||
break;
|
||||
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
client->iso_closure = request->closure;
|
||||
client->iso_context = fw_iso_context_create(client->device->card,
|
||||
request->type,
|
||||
request->channel,
|
||||
request->speed,
|
||||
request->header_size,
|
||||
iso_callback, client);
|
||||
if (IS_ERR(client->iso_context))
|
||||
return PTR_ERR(client->iso_context);
|
||||
|
||||
/* We only support one context at this time. */
|
||||
request->handle = 0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ioctl_queue_iso(struct client *client, void *buffer)
|
||||
{
|
||||
struct fw_cdev_queue_iso *request = buffer;
|
||||
struct fw_cdev_iso_packet __user *p, *end, *next;
|
||||
struct fw_iso_context *ctx = client->iso_context;
|
||||
unsigned long payload, buffer_end, header_length;
|
||||
int count;
|
||||
struct {
|
||||
struct fw_iso_packet packet;
|
||||
u8 header[256];
|
||||
} u;
|
||||
|
||||
if (ctx == NULL || request->handle != 0)
|
||||
return -EINVAL;
|
||||
|
||||
/*
|
||||
* If the user passes a non-NULL data pointer, has mmap()'ed
|
||||
* the iso buffer, and the pointer points inside the buffer,
|
||||
* we setup the payload pointers accordingly. Otherwise we
|
||||
* set them both to 0, which will still let packets with
|
||||
* payload_length == 0 through. In other words, if no packets
|
||||
* use the indirect payload, the iso buffer need not be mapped
|
||||
* and the request->data pointer is ignored.
|
||||
*/
|
||||
|
||||
payload = (unsigned long)request->data - client->vm_start;
|
||||
buffer_end = client->buffer.page_count << PAGE_SHIFT;
|
||||
if (request->data == 0 || client->buffer.pages == NULL ||
|
||||
payload >= buffer_end) {
|
||||
payload = 0;
|
||||
buffer_end = 0;
|
||||
}
|
||||
|
||||
if (!access_ok(VERIFY_READ, request->packets, request->size))
|
||||
return -EFAULT;
|
||||
|
||||
p = (struct fw_cdev_iso_packet __user *)u64_to_uptr(request->packets);
|
||||
end = (void __user *)p + request->size;
|
||||
count = 0;
|
||||
while (p < end) {
|
||||
if (__copy_from_user(&u.packet, p, sizeof(*p)))
|
||||
return -EFAULT;
|
||||
|
||||
if (ctx->type == FW_ISO_CONTEXT_TRANSMIT) {
|
||||
header_length = u.packet.header_length;
|
||||
} else {
|
||||
/*
|
||||
* We require that header_length is a multiple of
|
||||
* the fixed header size, ctx->header_size.
|
||||
*/
|
||||
if (ctx->header_size == 0) {
|
||||
if (u.packet.header_length > 0)
|
||||
return -EINVAL;
|
||||
} else if (u.packet.header_length % ctx->header_size != 0) {
|
||||
return -EINVAL;
|
||||
}
|
||||
header_length = 0;
|
||||
}
|
||||
|
||||
next = (struct fw_cdev_iso_packet __user *)
|
||||
&p->header[header_length / 4];
|
||||
if (next > end)
|
||||
return -EINVAL;
|
||||
if (__copy_from_user
|
||||
(u.packet.header, p->header, header_length))
|
||||
return -EFAULT;
|
||||
if (u.packet.skip && ctx->type == FW_ISO_CONTEXT_TRANSMIT &&
|
||||
u.packet.header_length + u.packet.payload_length > 0)
|
||||
return -EINVAL;
|
||||
if (payload + u.packet.payload_length > buffer_end)
|
||||
return -EINVAL;
|
||||
|
||||
if (fw_iso_context_queue(ctx, &u.packet,
|
||||
&client->buffer, payload))
|
||||
break;
|
||||
|
||||
p = next;
|
||||
payload += u.packet.payload_length;
|
||||
count++;
|
||||
}
|
||||
|
||||
request->size -= uptr_to_u64(p) - request->packets;
|
||||
request->packets = uptr_to_u64(p);
|
||||
request->data = client->vm_start + payload;
|
||||
|
||||
return count;
|
||||
}
|
||||
|
||||
static int ioctl_start_iso(struct client *client, void *buffer)
|
||||
{
|
||||
struct fw_cdev_start_iso *request = buffer;
|
||||
|
||||
if (request->handle != 0)
|
||||
return -EINVAL;
|
||||
if (client->iso_context->type == FW_ISO_CONTEXT_RECEIVE) {
|
||||
if (request->tags == 0 || request->tags > 15)
|
||||
return -EINVAL;
|
||||
|
||||
if (request->sync > 15)
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
return fw_iso_context_start(client->iso_context, request->cycle,
|
||||
request->sync, request->tags);
|
||||
}
|
||||
|
||||
static int ioctl_stop_iso(struct client *client, void *buffer)
|
||||
{
|
||||
struct fw_cdev_stop_iso *request = buffer;
|
||||
|
||||
if (request->handle != 0)
|
||||
return -EINVAL;
|
||||
|
||||
return fw_iso_context_stop(client->iso_context);
|
||||
}
|
||||
|
||||
static int (* const ioctl_handlers[])(struct client *client, void *buffer) = {
|
||||
ioctl_get_info,
|
||||
ioctl_send_request,
|
||||
ioctl_allocate,
|
||||
ioctl_deallocate,
|
||||
ioctl_send_response,
|
||||
ioctl_initiate_bus_reset,
|
||||
ioctl_add_descriptor,
|
||||
ioctl_remove_descriptor,
|
||||
ioctl_create_iso_context,
|
||||
ioctl_queue_iso,
|
||||
ioctl_start_iso,
|
||||
ioctl_stop_iso,
|
||||
};
|
||||
|
||||
static int
|
||||
dispatch_ioctl(struct client *client, unsigned int cmd, void __user *arg)
|
||||
{
|
||||
char buffer[256];
|
||||
int retval;
|
||||
|
||||
if (_IOC_TYPE(cmd) != '#' ||
|
||||
_IOC_NR(cmd) >= ARRAY_SIZE(ioctl_handlers))
|
||||
return -EINVAL;
|
||||
|
||||
if (_IOC_DIR(cmd) & _IOC_WRITE) {
|
||||
if (_IOC_SIZE(cmd) > sizeof(buffer) ||
|
||||
copy_from_user(buffer, arg, _IOC_SIZE(cmd)))
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
retval = ioctl_handlers[_IOC_NR(cmd)](client, buffer);
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
|
||||
if (_IOC_DIR(cmd) & _IOC_READ) {
|
||||
if (_IOC_SIZE(cmd) > sizeof(buffer) ||
|
||||
copy_to_user(arg, buffer, _IOC_SIZE(cmd)))
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static long
|
||||
fw_device_op_ioctl(struct file *file,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct client *client = file->private_data;
|
||||
|
||||
return dispatch_ioctl(client, cmd, (void __user *) arg);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_COMPAT
|
||||
static long
|
||||
fw_device_op_compat_ioctl(struct file *file,
|
||||
unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct client *client = file->private_data;
|
||||
|
||||
return dispatch_ioctl(client, cmd, compat_ptr(arg));
|
||||
}
|
||||
#endif
|
||||
|
||||
static int fw_device_op_mmap(struct file *file, struct vm_area_struct *vma)
|
||||
{
|
||||
struct client *client = file->private_data;
|
||||
enum dma_data_direction direction;
|
||||
unsigned long size;
|
||||
int page_count, retval;
|
||||
|
||||
/* FIXME: We could support multiple buffers, but we don't. */
|
||||
if (client->buffer.pages != NULL)
|
||||
return -EBUSY;
|
||||
|
||||
if (!(vma->vm_flags & VM_SHARED))
|
||||
return -EINVAL;
|
||||
|
||||
if (vma->vm_start & ~PAGE_MASK)
|
||||
return -EINVAL;
|
||||
|
||||
client->vm_start = vma->vm_start;
|
||||
size = vma->vm_end - vma->vm_start;
|
||||
page_count = size >> PAGE_SHIFT;
|
||||
if (size & ~PAGE_MASK)
|
||||
return -EINVAL;
|
||||
|
||||
if (vma->vm_flags & VM_WRITE)
|
||||
direction = DMA_TO_DEVICE;
|
||||
else
|
||||
direction = DMA_FROM_DEVICE;
|
||||
|
||||
retval = fw_iso_buffer_init(&client->buffer, client->device->card,
|
||||
page_count, direction);
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
|
||||
retval = fw_iso_buffer_map(&client->buffer, vma);
|
||||
if (retval < 0)
|
||||
fw_iso_buffer_destroy(&client->buffer, client->device->card);
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
static int fw_device_op_release(struct inode *inode, struct file *file)
|
||||
{
|
||||
struct client *client = file->private_data;
|
||||
struct event *e, *next_e;
|
||||
struct client_resource *r, *next_r;
|
||||
unsigned long flags;
|
||||
|
||||
if (client->buffer.pages)
|
||||
fw_iso_buffer_destroy(&client->buffer, client->device->card);
|
||||
|
||||
if (client->iso_context)
|
||||
fw_iso_context_destroy(client->iso_context);
|
||||
|
||||
list_for_each_entry_safe(r, next_r, &client->resource_list, link)
|
||||
r->release(client, r);
|
||||
|
||||
/*
|
||||
* FIXME: We should wait for the async tasklets to stop
|
||||
* running before freeing the memory.
|
||||
*/
|
||||
|
||||
list_for_each_entry_safe(e, next_e, &client->event_list, link)
|
||||
kfree(e);
|
||||
|
||||
spin_lock_irqsave(&client->device->card->lock, flags);
|
||||
list_del(&client->link);
|
||||
spin_unlock_irqrestore(&client->device->card->lock, flags);
|
||||
|
||||
fw_device_put(client->device);
|
||||
kfree(client);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static unsigned int fw_device_op_poll(struct file *file, poll_table * pt)
|
||||
{
|
||||
struct client *client = file->private_data;
|
||||
unsigned int mask = 0;
|
||||
|
||||
poll_wait(file, &client->wait, pt);
|
||||
|
||||
if (fw_device_is_shutdown(client->device))
|
||||
mask |= POLLHUP | POLLERR;
|
||||
if (!list_empty(&client->event_list))
|
||||
mask |= POLLIN | POLLRDNORM;
|
||||
|
||||
return mask;
|
||||
}
|
||||
|
||||
const struct file_operations fw_device_ops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = fw_device_op_open,
|
||||
.read = fw_device_op_read,
|
||||
.unlocked_ioctl = fw_device_op_ioctl,
|
||||
.poll = fw_device_op_poll,
|
||||
.release = fw_device_op_release,
|
||||
.mmap = fw_device_op_mmap,
|
||||
|
||||
#ifdef CONFIG_COMPAT
|
||||
.compat_ioctl = fw_device_op_compat_ioctl,
|
||||
#endif
|
||||
};
|
||||
|
|
@ -0,0 +1,813 @@
|
|||
/*
|
||||
* Device probing and sysfs code.
|
||||
*
|
||||
* Copyright (C) 2005-2006 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/module.h>
|
||||
#include <linux/wait.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/kthread.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/idr.h>
|
||||
#include <linux/rwsem.h>
|
||||
#include <asm/semaphore.h>
|
||||
#include <linux/ctype.h>
|
||||
#include "fw-transaction.h"
|
||||
#include "fw-topology.h"
|
||||
#include "fw-device.h"
|
||||
|
||||
void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 * p)
|
||||
{
|
||||
ci->p = p + 1;
|
||||
ci->end = ci->p + (p[0] >> 16);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_csr_iterator_init);
|
||||
|
||||
int fw_csr_iterator_next(struct fw_csr_iterator *ci, int *key, int *value)
|
||||
{
|
||||
*key = *ci->p >> 24;
|
||||
*value = *ci->p & 0xffffff;
|
||||
|
||||
return ci->p++ < ci->end;
|
||||
}
|
||||
EXPORT_SYMBOL(fw_csr_iterator_next);
|
||||
|
||||
static int is_fw_unit(struct device *dev);
|
||||
|
||||
static int match_unit_directory(u32 * directory, const struct fw_device_id *id)
|
||||
{
|
||||
struct fw_csr_iterator ci;
|
||||
int key, value, match;
|
||||
|
||||
match = 0;
|
||||
fw_csr_iterator_init(&ci, directory);
|
||||
while (fw_csr_iterator_next(&ci, &key, &value)) {
|
||||
if (key == CSR_VENDOR && value == id->vendor)
|
||||
match |= FW_MATCH_VENDOR;
|
||||
if (key == CSR_MODEL && value == id->model)
|
||||
match |= FW_MATCH_MODEL;
|
||||
if (key == CSR_SPECIFIER_ID && value == id->specifier_id)
|
||||
match |= FW_MATCH_SPECIFIER_ID;
|
||||
if (key == CSR_VERSION && value == id->version)
|
||||
match |= FW_MATCH_VERSION;
|
||||
}
|
||||
|
||||
return (match & id->match_flags) == id->match_flags;
|
||||
}
|
||||
|
||||
static int fw_unit_match(struct device *dev, struct device_driver *drv)
|
||||
{
|
||||
struct fw_unit *unit = fw_unit(dev);
|
||||
struct fw_driver *driver = fw_driver(drv);
|
||||
int i;
|
||||
|
||||
/* We only allow binding to fw_units. */
|
||||
if (!is_fw_unit(dev))
|
||||
return 0;
|
||||
|
||||
for (i = 0; driver->id_table[i].match_flags != 0; i++) {
|
||||
if (match_unit_directory(unit->directory, &driver->id_table[i]))
|
||||
return 1;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int get_modalias(struct fw_unit *unit, char *buffer, size_t buffer_size)
|
||||
{
|
||||
struct fw_device *device = fw_device(unit->device.parent);
|
||||
struct fw_csr_iterator ci;
|
||||
|
||||
int key, value;
|
||||
int vendor = 0;
|
||||
int model = 0;
|
||||
int specifier_id = 0;
|
||||
int version = 0;
|
||||
|
||||
fw_csr_iterator_init(&ci, &device->config_rom[5]);
|
||||
while (fw_csr_iterator_next(&ci, &key, &value)) {
|
||||
switch (key) {
|
||||
case CSR_VENDOR:
|
||||
vendor = value;
|
||||
break;
|
||||
case CSR_MODEL:
|
||||
model = value;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
fw_csr_iterator_init(&ci, unit->directory);
|
||||
while (fw_csr_iterator_next(&ci, &key, &value)) {
|
||||
switch (key) {
|
||||
case CSR_SPECIFIER_ID:
|
||||
specifier_id = value;
|
||||
break;
|
||||
case CSR_VERSION:
|
||||
version = value;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return snprintf(buffer, buffer_size,
|
||||
"ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
|
||||
vendor, model, specifier_id, version);
|
||||
}
|
||||
|
||||
static int
|
||||
fw_unit_uevent(struct device *dev, char **envp, int num_envp,
|
||||
char *buffer, int buffer_size)
|
||||
{
|
||||
struct fw_unit *unit = fw_unit(dev);
|
||||
char modalias[64];
|
||||
int length = 0;
|
||||
int i = 0;
|
||||
|
||||
get_modalias(unit, modalias, sizeof(modalias));
|
||||
|
||||
if (add_uevent_var(envp, num_envp, &i,
|
||||
buffer, buffer_size, &length,
|
||||
"MODALIAS=%s", modalias))
|
||||
return -ENOMEM;
|
||||
|
||||
envp[i] = NULL;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct bus_type fw_bus_type = {
|
||||
.name = "firewire",
|
||||
.match = fw_unit_match,
|
||||
};
|
||||
EXPORT_SYMBOL(fw_bus_type);
|
||||
|
||||
struct fw_device *fw_device_get(struct fw_device *device)
|
||||
{
|
||||
get_device(&device->device);
|
||||
|
||||
return device;
|
||||
}
|
||||
|
||||
void fw_device_put(struct fw_device *device)
|
||||
{
|
||||
put_device(&device->device);
|
||||
}
|
||||
|
||||
static void fw_device_release(struct device *dev)
|
||||
{
|
||||
struct fw_device *device = fw_device(dev);
|
||||
unsigned long flags;
|
||||
|
||||
/*
|
||||
* Take the card lock so we don't set this to NULL while a
|
||||
* FW_NODE_UPDATED callback is being handled.
|
||||
*/
|
||||
spin_lock_irqsave(&device->card->lock, flags);
|
||||
device->node->data = NULL;
|
||||
spin_unlock_irqrestore(&device->card->lock, flags);
|
||||
|
||||
fw_node_put(device->node);
|
||||
fw_card_put(device->card);
|
||||
kfree(device->config_rom);
|
||||
kfree(device);
|
||||
}
|
||||
|
||||
int fw_device_enable_phys_dma(struct fw_device *device)
|
||||
{
|
||||
return device->card->driver->enable_phys_dma(device->card,
|
||||
device->node_id,
|
||||
device->generation);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_device_enable_phys_dma);
|
||||
|
||||
struct config_rom_attribute {
|
||||
struct device_attribute attr;
|
||||
u32 key;
|
||||
};
|
||||
|
||||
static ssize_t
|
||||
show_immediate(struct device *dev, struct device_attribute *dattr, char *buf)
|
||||
{
|
||||
struct config_rom_attribute *attr =
|
||||
container_of(dattr, struct config_rom_attribute, attr);
|
||||
struct fw_csr_iterator ci;
|
||||
u32 *dir;
|
||||
int key, value;
|
||||
|
||||
if (is_fw_unit(dev))
|
||||
dir = fw_unit(dev)->directory;
|
||||
else
|
||||
dir = fw_device(dev)->config_rom + 5;
|
||||
|
||||
fw_csr_iterator_init(&ci, dir);
|
||||
while (fw_csr_iterator_next(&ci, &key, &value))
|
||||
if (attr->key == key)
|
||||
return snprintf(buf, buf ? PAGE_SIZE : 0,
|
||||
"0x%06x\n", value);
|
||||
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
#define IMMEDIATE_ATTR(name, key) \
|
||||
{ __ATTR(name, S_IRUGO, show_immediate, NULL), key }
|
||||
|
||||
static ssize_t
|
||||
show_text_leaf(struct device *dev, struct device_attribute *dattr, char *buf)
|
||||
{
|
||||
struct config_rom_attribute *attr =
|
||||
container_of(dattr, struct config_rom_attribute, attr);
|
||||
struct fw_csr_iterator ci;
|
||||
u32 *dir, *block = NULL, *p, *end;
|
||||
int length, key, value, last_key = 0;
|
||||
char *b;
|
||||
|
||||
if (is_fw_unit(dev))
|
||||
dir = fw_unit(dev)->directory;
|
||||
else
|
||||
dir = fw_device(dev)->config_rom + 5;
|
||||
|
||||
fw_csr_iterator_init(&ci, dir);
|
||||
while (fw_csr_iterator_next(&ci, &key, &value)) {
|
||||
if (attr->key == last_key &&
|
||||
key == (CSR_DESCRIPTOR | CSR_LEAF))
|
||||
block = ci.p - 1 + value;
|
||||
last_key = key;
|
||||
}
|
||||
|
||||
if (block == NULL)
|
||||
return -ENOENT;
|
||||
|
||||
length = min(block[0] >> 16, 256U);
|
||||
if (length < 3)
|
||||
return -ENOENT;
|
||||
|
||||
if (block[1] != 0 || block[2] != 0)
|
||||
/* Unknown encoding. */
|
||||
return -ENOENT;
|
||||
|
||||
if (buf == NULL)
|
||||
return length * 4;
|
||||
|
||||
b = buf;
|
||||
end = &block[length + 1];
|
||||
for (p = &block[3]; p < end; p++, b += 4)
|
||||
* (u32 *) b = (__force u32) __cpu_to_be32(*p);
|
||||
|
||||
/* Strip trailing whitespace and add newline. */
|
||||
while (b--, (isspace(*b) || *b == '\0') && b > buf);
|
||||
strcpy(b + 1, "\n");
|
||||
|
||||
return b + 2 - buf;
|
||||
}
|
||||
|
||||
#define TEXT_LEAF_ATTR(name, key) \
|
||||
{ __ATTR(name, S_IRUGO, show_text_leaf, NULL), key }
|
||||
|
||||
static struct config_rom_attribute config_rom_attributes[] = {
|
||||
IMMEDIATE_ATTR(vendor, CSR_VENDOR),
|
||||
IMMEDIATE_ATTR(hardware_version, CSR_HARDWARE_VERSION),
|
||||
IMMEDIATE_ATTR(specifier_id, CSR_SPECIFIER_ID),
|
||||
IMMEDIATE_ATTR(version, CSR_VERSION),
|
||||
IMMEDIATE_ATTR(model, CSR_MODEL),
|
||||
TEXT_LEAF_ATTR(vendor_name, CSR_VENDOR),
|
||||
TEXT_LEAF_ATTR(model_name, CSR_MODEL),
|
||||
TEXT_LEAF_ATTR(hardware_version_name, CSR_HARDWARE_VERSION),
|
||||
};
|
||||
|
||||
static void
|
||||
init_fw_attribute_group(struct device *dev,
|
||||
struct device_attribute *attrs,
|
||||
struct fw_attribute_group *group)
|
||||
{
|
||||
struct device_attribute *attr;
|
||||
int i, j;
|
||||
|
||||
for (j = 0; attrs[j].attr.name != NULL; j++)
|
||||
group->attrs[j] = &attrs[j].attr;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(config_rom_attributes); i++) {
|
||||
attr = &config_rom_attributes[i].attr;
|
||||
if (attr->show(dev, attr, NULL) < 0)
|
||||
continue;
|
||||
group->attrs[j++] = &attr->attr;
|
||||
}
|
||||
|
||||
BUG_ON(j >= ARRAY_SIZE(group->attrs));
|
||||
group->attrs[j++] = NULL;
|
||||
group->groups[0] = &group->group;
|
||||
group->groups[1] = NULL;
|
||||
group->group.attrs = group->attrs;
|
||||
dev->groups = group->groups;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
modalias_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct fw_unit *unit = fw_unit(dev);
|
||||
int length;
|
||||
|
||||
length = get_modalias(unit, buf, PAGE_SIZE);
|
||||
strcpy(buf + length, "\n");
|
||||
|
||||
return length + 1;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
rom_index_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct fw_device *device = fw_device(dev->parent);
|
||||
struct fw_unit *unit = fw_unit(dev);
|
||||
|
||||
return snprintf(buf, PAGE_SIZE, "%d\n",
|
||||
(int)(unit->directory - device->config_rom));
|
||||
}
|
||||
|
||||
static struct device_attribute fw_unit_attributes[] = {
|
||||
__ATTR_RO(modalias),
|
||||
__ATTR_RO(rom_index),
|
||||
__ATTR_NULL,
|
||||
};
|
||||
|
||||
static ssize_t
|
||||
config_rom_show(struct device *dev, struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct fw_device *device = fw_device(dev);
|
||||
|
||||
memcpy(buf, device->config_rom, device->config_rom_length * 4);
|
||||
|
||||
return device->config_rom_length * 4;
|
||||
}
|
||||
|
||||
static ssize_t
|
||||
guid_show(struct device *dev, struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct fw_device *device = fw_device(dev);
|
||||
u64 guid;
|
||||
|
||||
guid = ((u64)device->config_rom[3] << 32) | device->config_rom[4];
|
||||
|
||||
return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
|
||||
(unsigned long long)guid);
|
||||
}
|
||||
|
||||
static struct device_attribute fw_device_attributes[] = {
|
||||
__ATTR_RO(config_rom),
|
||||
__ATTR_RO(guid),
|
||||
__ATTR_NULL,
|
||||
};
|
||||
|
||||
struct read_quadlet_callback_data {
|
||||
struct completion done;
|
||||
int rcode;
|
||||
u32 data;
|
||||
};
|
||||
|
||||
static void
|
||||
complete_transaction(struct fw_card *card, int rcode,
|
||||
void *payload, size_t length, void *data)
|
||||
{
|
||||
struct read_quadlet_callback_data *callback_data = data;
|
||||
|
||||
if (rcode == RCODE_COMPLETE)
|
||||
callback_data->data = be32_to_cpu(*(__be32 *)payload);
|
||||
callback_data->rcode = rcode;
|
||||
complete(&callback_data->done);
|
||||
}
|
||||
|
||||
static int read_rom(struct fw_device *device, int index, u32 * data)
|
||||
{
|
||||
struct read_quadlet_callback_data callback_data;
|
||||
struct fw_transaction t;
|
||||
u64 offset;
|
||||
|
||||
init_completion(&callback_data.done);
|
||||
|
||||
offset = 0xfffff0000400ULL + index * 4;
|
||||
fw_send_request(device->card, &t, TCODE_READ_QUADLET_REQUEST,
|
||||
device->node_id,
|
||||
device->generation, SCODE_100,
|
||||
offset, NULL, 4, complete_transaction, &callback_data);
|
||||
|
||||
wait_for_completion(&callback_data.done);
|
||||
|
||||
*data = callback_data.data;
|
||||
|
||||
return callback_data.rcode;
|
||||
}
|
||||
|
||||
static int read_bus_info_block(struct fw_device *device)
|
||||
{
|
||||
static u32 rom[256];
|
||||
u32 stack[16], sp, key;
|
||||
int i, end, length;
|
||||
|
||||
/* First read the bus info block. */
|
||||
for (i = 0; i < 5; i++) {
|
||||
if (read_rom(device, i, &rom[i]) != RCODE_COMPLETE)
|
||||
return -1;
|
||||
/*
|
||||
* As per IEEE1212 7.2, during power-up, devices can
|
||||
* reply with a 0 for the first quadlet of the config
|
||||
* rom to indicate that they are booting (for example,
|
||||
* if the firmware is on the disk of a external
|
||||
* harddisk). In that case we just fail, and the
|
||||
* retry mechanism will try again later.
|
||||
*/
|
||||
if (i == 0 && rom[i] == 0)
|
||||
return -1;
|
||||
}
|
||||
|
||||
/*
|
||||
* Now parse the config rom. The config rom is a recursive
|
||||
* directory structure so we parse it using a stack of
|
||||
* references to the blocks that make up the structure. We
|
||||
* push a reference to the root directory on the stack to
|
||||
* start things off.
|
||||
*/
|
||||
length = i;
|
||||
sp = 0;
|
||||
stack[sp++] = 0xc0000005;
|
||||
while (sp > 0) {
|
||||
/*
|
||||
* Pop the next block reference of the stack. The
|
||||
* lower 24 bits is the offset into the config rom,
|
||||
* the upper 8 bits are the type of the reference the
|
||||
* block.
|
||||
*/
|
||||
key = stack[--sp];
|
||||
i = key & 0xffffff;
|
||||
if (i >= ARRAY_SIZE(rom))
|
||||
/*
|
||||
* The reference points outside the standard
|
||||
* config rom area, something's fishy.
|
||||
*/
|
||||
return -1;
|
||||
|
||||
/* Read header quadlet for the block to get the length. */
|
||||
if (read_rom(device, i, &rom[i]) != RCODE_COMPLETE)
|
||||
return -1;
|
||||
end = i + (rom[i] >> 16) + 1;
|
||||
i++;
|
||||
if (end > ARRAY_SIZE(rom))
|
||||
/*
|
||||
* This block extends outside standard config
|
||||
* area (and the array we're reading it
|
||||
* into). That's broken, so ignore this
|
||||
* device.
|
||||
*/
|
||||
return -1;
|
||||
|
||||
/*
|
||||
* Now read in the block. If this is a directory
|
||||
* block, check the entries as we read them to see if
|
||||
* it references another block, and push it in that case.
|
||||
*/
|
||||
while (i < end) {
|
||||
if (read_rom(device, i, &rom[i]) != RCODE_COMPLETE)
|
||||
return -1;
|
||||
if ((key >> 30) == 3 && (rom[i] >> 30) > 1 &&
|
||||
sp < ARRAY_SIZE(stack))
|
||||
stack[sp++] = i + rom[i];
|
||||
i++;
|
||||
}
|
||||
if (length < i)
|
||||
length = i;
|
||||
}
|
||||
|
||||
device->config_rom = kmalloc(length * 4, GFP_KERNEL);
|
||||
if (device->config_rom == NULL)
|
||||
return -1;
|
||||
memcpy(device->config_rom, rom, length * 4);
|
||||
device->config_rom_length = length;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void fw_unit_release(struct device *dev)
|
||||
{
|
||||
struct fw_unit *unit = fw_unit(dev);
|
||||
|
||||
kfree(unit);
|
||||
}
|
||||
|
||||
static struct device_type fw_unit_type = {
|
||||
.uevent = fw_unit_uevent,
|
||||
.release = fw_unit_release,
|
||||
};
|
||||
|
||||
static int is_fw_unit(struct device *dev)
|
||||
{
|
||||
return dev->type == &fw_unit_type;
|
||||
}
|
||||
|
||||
static void create_units(struct fw_device *device)
|
||||
{
|
||||
struct fw_csr_iterator ci;
|
||||
struct fw_unit *unit;
|
||||
int key, value, i;
|
||||
|
||||
i = 0;
|
||||
fw_csr_iterator_init(&ci, &device->config_rom[5]);
|
||||
while (fw_csr_iterator_next(&ci, &key, &value)) {
|
||||
if (key != (CSR_UNIT | CSR_DIRECTORY))
|
||||
continue;
|
||||
|
||||
/*
|
||||
* Get the address of the unit directory and try to
|
||||
* match the drivers id_tables against it.
|
||||
*/
|
||||
unit = kzalloc(sizeof(*unit), GFP_KERNEL);
|
||||
if (unit == NULL) {
|
||||
fw_error("failed to allocate memory for unit\n");
|
||||
continue;
|
||||
}
|
||||
|
||||
unit->directory = ci.p + value - 1;
|
||||
unit->device.bus = &fw_bus_type;
|
||||
unit->device.type = &fw_unit_type;
|
||||
unit->device.parent = &device->device;
|
||||
snprintf(unit->device.bus_id, sizeof(unit->device.bus_id),
|
||||
"%s.%d", device->device.bus_id, i++);
|
||||
|
||||
init_fw_attribute_group(&unit->device,
|
||||
fw_unit_attributes,
|
||||
&unit->attribute_group);
|
||||
if (device_register(&unit->device) < 0)
|
||||
goto skip_unit;
|
||||
|
||||
continue;
|
||||
|
||||
skip_unit:
|
||||
kfree(unit);
|
||||
}
|
||||
}
|
||||
|
||||
static int shutdown_unit(struct device *device, void *data)
|
||||
{
|
||||
device_unregister(device);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static DECLARE_RWSEM(idr_rwsem);
|
||||
static DEFINE_IDR(fw_device_idr);
|
||||
int fw_cdev_major;
|
||||
|
||||
struct fw_device *fw_device_from_devt(dev_t devt)
|
||||
{
|
||||
struct fw_device *device;
|
||||
|
||||
down_read(&idr_rwsem);
|
||||
device = idr_find(&fw_device_idr, MINOR(devt));
|
||||
up_read(&idr_rwsem);
|
||||
|
||||
return device;
|
||||
}
|
||||
|
||||
static void fw_device_shutdown(struct work_struct *work)
|
||||
{
|
||||
struct fw_device *device =
|
||||
container_of(work, struct fw_device, work.work);
|
||||
int minor = MINOR(device->device.devt);
|
||||
|
||||
down_write(&idr_rwsem);
|
||||
idr_remove(&fw_device_idr, minor);
|
||||
up_write(&idr_rwsem);
|
||||
|
||||
fw_device_cdev_remove(device);
|
||||
device_for_each_child(&device->device, NULL, shutdown_unit);
|
||||
device_unregister(&device->device);
|
||||
}
|
||||
|
||||
static struct device_type fw_device_type = {
|
||||
.release = fw_device_release,
|
||||
};
|
||||
|
||||
/*
|
||||
* These defines control the retry behavior for reading the config
|
||||
* rom. It shouldn't be necessary to tweak these; if the device
|
||||
* doesn't respond to a config rom read within 10 seconds, it's not
|
||||
* going to respond at all. As for the initial delay, a lot of
|
||||
* devices will be able to respond within half a second after bus
|
||||
* reset. On the other hand, it's not really worth being more
|
||||
* aggressive than that, since it scales pretty well; if 10 devices
|
||||
* are plugged in, they're all getting read within one second.
|
||||
*/
|
||||
|
||||
#define MAX_RETRIES 10
|
||||
#define RETRY_DELAY (3 * HZ)
|
||||
#define INITIAL_DELAY (HZ / 2)
|
||||
|
||||
static void fw_device_init(struct work_struct *work)
|
||||
{
|
||||
struct fw_device *device =
|
||||
container_of(work, struct fw_device, work.work);
|
||||
int minor, err;
|
||||
|
||||
/*
|
||||
* All failure paths here set node->data to NULL, so that we
|
||||
* don't try to do device_for_each_child() on a kfree()'d
|
||||
* device.
|
||||
*/
|
||||
|
||||
if (read_bus_info_block(device) < 0) {
|
||||
if (device->config_rom_retries < MAX_RETRIES) {
|
||||
device->config_rom_retries++;
|
||||
schedule_delayed_work(&device->work, RETRY_DELAY);
|
||||
} else {
|
||||
fw_notify("giving up on config rom for node id %x\n",
|
||||
device->node_id);
|
||||
if (device->node == device->card->root_node)
|
||||
schedule_delayed_work(&device->card->work, 0);
|
||||
fw_device_release(&device->device);
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
err = -ENOMEM;
|
||||
down_write(&idr_rwsem);
|
||||
if (idr_pre_get(&fw_device_idr, GFP_KERNEL))
|
||||
err = idr_get_new(&fw_device_idr, device, &minor);
|
||||
up_write(&idr_rwsem);
|
||||
if (err < 0)
|
||||
goto error;
|
||||
|
||||
device->device.bus = &fw_bus_type;
|
||||
device->device.type = &fw_device_type;
|
||||
device->device.parent = device->card->device;
|
||||
device->device.devt = MKDEV(fw_cdev_major, minor);
|
||||
snprintf(device->device.bus_id, sizeof(device->device.bus_id),
|
||||
"fw%d", minor);
|
||||
|
||||
init_fw_attribute_group(&device->device,
|
||||
fw_device_attributes,
|
||||
&device->attribute_group);
|
||||
if (device_add(&device->device)) {
|
||||
fw_error("Failed to add device.\n");
|
||||
goto error_with_cdev;
|
||||
}
|
||||
|
||||
create_units(device);
|
||||
|
||||
/*
|
||||
* Transition the device to running state. If it got pulled
|
||||
* out from under us while we did the intialization work, we
|
||||
* have to shut down the device again here. Normally, though,
|
||||
* fw_node_event will be responsible for shutting it down when
|
||||
* necessary. We have to use the atomic cmpxchg here to avoid
|
||||
* racing with the FW_NODE_DESTROYED case in
|
||||
* fw_node_event().
|
||||
*/
|
||||
if (atomic_cmpxchg(&device->state,
|
||||
FW_DEVICE_INITIALIZING,
|
||||
FW_DEVICE_RUNNING) == FW_DEVICE_SHUTDOWN)
|
||||
fw_device_shutdown(&device->work.work);
|
||||
else
|
||||
fw_notify("created new fw device %s (%d config rom retries)\n",
|
||||
device->device.bus_id, device->config_rom_retries);
|
||||
|
||||
/*
|
||||
* Reschedule the IRM work if we just finished reading the
|
||||
* root node config rom. If this races with a bus reset we
|
||||
* just end up running the IRM work a couple of extra times -
|
||||
* pretty harmless.
|
||||
*/
|
||||
if (device->node == device->card->root_node)
|
||||
schedule_delayed_work(&device->card->work, 0);
|
||||
|
||||
return;
|
||||
|
||||
error_with_cdev:
|
||||
down_write(&idr_rwsem);
|
||||
idr_remove(&fw_device_idr, minor);
|
||||
up_write(&idr_rwsem);
|
||||
error:
|
||||
put_device(&device->device);
|
||||
}
|
||||
|
||||
static int update_unit(struct device *dev, void *data)
|
||||
{
|
||||
struct fw_unit *unit = fw_unit(dev);
|
||||
struct fw_driver *driver = (struct fw_driver *)dev->driver;
|
||||
|
||||
if (is_fw_unit(dev) && driver != NULL && driver->update != NULL) {
|
||||
down(&dev->sem);
|
||||
driver->update(unit);
|
||||
up(&dev->sem);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void fw_device_update(struct work_struct *work)
|
||||
{
|
||||
struct fw_device *device =
|
||||
container_of(work, struct fw_device, work.work);
|
||||
|
||||
fw_device_cdev_update(device);
|
||||
device_for_each_child(&device->device, NULL, update_unit);
|
||||
}
|
||||
|
||||
void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
|
||||
{
|
||||
struct fw_device *device;
|
||||
|
||||
switch (event) {
|
||||
case FW_NODE_CREATED:
|
||||
case FW_NODE_LINK_ON:
|
||||
if (!node->link_on)
|
||||
break;
|
||||
|
||||
device = kzalloc(sizeof(*device), GFP_ATOMIC);
|
||||
if (device == NULL)
|
||||
break;
|
||||
|
||||
/*
|
||||
* Do minimal intialization of the device here, the
|
||||
* rest will happen in fw_device_init(). We need the
|
||||
* card and node so we can read the config rom and we
|
||||
* need to do device_initialize() now so
|
||||
* device_for_each_child() in FW_NODE_UPDATED is
|
||||
* doesn't freak out.
|
||||
*/
|
||||
device_initialize(&device->device);
|
||||
atomic_set(&device->state, FW_DEVICE_INITIALIZING);
|
||||
device->card = fw_card_get(card);
|
||||
device->node = fw_node_get(node);
|
||||
device->node_id = node->node_id;
|
||||
device->generation = card->generation;
|
||||
INIT_LIST_HEAD(&device->client_list);
|
||||
|
||||
/*
|
||||
* Set the node data to point back to this device so
|
||||
* FW_NODE_UPDATED callbacks can update the node_id
|
||||
* and generation for the device.
|
||||
*/
|
||||
node->data = device;
|
||||
|
||||
/*
|
||||
* Many devices are slow to respond after bus resets,
|
||||
* especially if they are bus powered and go through
|
||||
* power-up after getting plugged in. We schedule the
|
||||
* first config rom scan half a second after bus reset.
|
||||
*/
|
||||
INIT_DELAYED_WORK(&device->work, fw_device_init);
|
||||
schedule_delayed_work(&device->work, INITIAL_DELAY);
|
||||
break;
|
||||
|
||||
case FW_NODE_UPDATED:
|
||||
if (!node->link_on || node->data == NULL)
|
||||
break;
|
||||
|
||||
device = node->data;
|
||||
device->node_id = node->node_id;
|
||||
device->generation = card->generation;
|
||||
if (atomic_read(&device->state) == FW_DEVICE_RUNNING) {
|
||||
PREPARE_DELAYED_WORK(&device->work, fw_device_update);
|
||||
schedule_delayed_work(&device->work, 0);
|
||||
}
|
||||
break;
|
||||
|
||||
case FW_NODE_DESTROYED:
|
||||
case FW_NODE_LINK_OFF:
|
||||
if (!node->data)
|
||||
break;
|
||||
|
||||
/*
|
||||
* Destroy the device associated with the node. There
|
||||
* are two cases here: either the device is fully
|
||||
* initialized (FW_DEVICE_RUNNING) or we're in the
|
||||
* process of reading its config rom
|
||||
* (FW_DEVICE_INITIALIZING). If it is fully
|
||||
* initialized we can reuse device->work to schedule a
|
||||
* full fw_device_shutdown(). If not, there's work
|
||||
* scheduled to read it's config rom, and we just put
|
||||
* the device in shutdown state to have that code fail
|
||||
* to create the device.
|
||||
*/
|
||||
device = node->data;
|
||||
if (atomic_xchg(&device->state,
|
||||
FW_DEVICE_SHUTDOWN) == FW_DEVICE_RUNNING) {
|
||||
PREPARE_DELAYED_WORK(&device->work, fw_device_shutdown);
|
||||
schedule_delayed_work(&device->work, 0);
|
||||
}
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,146 @@
|
|||
/*
|
||||
* Copyright (C) 2005-2006 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_device_h
|
||||
#define __fw_device_h
|
||||
|
||||
#include <linux/fs.h>
|
||||
#include <linux/cdev.h>
|
||||
#include <asm/atomic.h>
|
||||
|
||||
enum fw_device_state {
|
||||
FW_DEVICE_INITIALIZING,
|
||||
FW_DEVICE_RUNNING,
|
||||
FW_DEVICE_SHUTDOWN,
|
||||
};
|
||||
|
||||
struct fw_attribute_group {
|
||||
struct attribute_group *groups[2];
|
||||
struct attribute_group group;
|
||||
struct attribute *attrs[11];
|
||||
};
|
||||
|
||||
struct fw_device {
|
||||
atomic_t state;
|
||||
struct fw_node *node;
|
||||
int node_id;
|
||||
int generation;
|
||||
struct fw_card *card;
|
||||
struct device device;
|
||||
struct list_head link;
|
||||
struct list_head client_list;
|
||||
u32 *config_rom;
|
||||
size_t config_rom_length;
|
||||
int config_rom_retries;
|
||||
struct delayed_work work;
|
||||
struct fw_attribute_group attribute_group;
|
||||
};
|
||||
|
||||
static inline struct fw_device *
|
||||
fw_device(struct device *dev)
|
||||
{
|
||||
return container_of(dev, struct fw_device, device);
|
||||
}
|
||||
|
||||
static inline int
|
||||
fw_device_is_shutdown(struct fw_device *device)
|
||||
{
|
||||
return atomic_read(&device->state) == FW_DEVICE_SHUTDOWN;
|
||||
}
|
||||
|
||||
struct fw_device *fw_device_get(struct fw_device *device);
|
||||
void fw_device_put(struct fw_device *device);
|
||||
int fw_device_enable_phys_dma(struct fw_device *device);
|
||||
|
||||
void fw_device_cdev_update(struct fw_device *device);
|
||||
void fw_device_cdev_remove(struct fw_device *device);
|
||||
|
||||
struct fw_device *fw_device_from_devt(dev_t devt);
|
||||
extern int fw_cdev_major;
|
||||
|
||||
struct fw_unit {
|
||||
struct device device;
|
||||
u32 *directory;
|
||||
struct fw_attribute_group attribute_group;
|
||||
};
|
||||
|
||||
static inline struct fw_unit *
|
||||
fw_unit(struct device *dev)
|
||||
{
|
||||
return container_of(dev, struct fw_unit, device);
|
||||
}
|
||||
|
||||
#define CSR_OFFSET 0x40
|
||||
#define CSR_LEAF 0x80
|
||||
#define CSR_DIRECTORY 0xc0
|
||||
|
||||
#define CSR_DESCRIPTOR 0x01
|
||||
#define CSR_VENDOR 0x03
|
||||
#define CSR_HARDWARE_VERSION 0x04
|
||||
#define CSR_NODE_CAPABILITIES 0x0c
|
||||
#define CSR_UNIT 0x11
|
||||
#define CSR_SPECIFIER_ID 0x12
|
||||
#define CSR_VERSION 0x13
|
||||
#define CSR_DEPENDENT_INFO 0x14
|
||||
#define CSR_MODEL 0x17
|
||||
#define CSR_INSTANCE 0x18
|
||||
|
||||
#define SBP2_COMMAND_SET_SPECIFIER 0x38
|
||||
#define SBP2_COMMAND_SET 0x39
|
||||
#define SBP2_COMMAND_SET_REVISION 0x3b
|
||||
#define SBP2_FIRMWARE_REVISION 0x3c
|
||||
|
||||
struct fw_csr_iterator {
|
||||
u32 *p;
|
||||
u32 *end;
|
||||
};
|
||||
|
||||
void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 *p);
|
||||
int fw_csr_iterator_next(struct fw_csr_iterator *ci,
|
||||
int *key, int *value);
|
||||
|
||||
#define FW_MATCH_VENDOR 0x0001
|
||||
#define FW_MATCH_MODEL 0x0002
|
||||
#define FW_MATCH_SPECIFIER_ID 0x0004
|
||||
#define FW_MATCH_VERSION 0x0008
|
||||
|
||||
struct fw_device_id {
|
||||
u32 match_flags;
|
||||
u32 vendor;
|
||||
u32 model;
|
||||
u32 specifier_id;
|
||||
u32 version;
|
||||
void *driver_data;
|
||||
};
|
||||
|
||||
struct fw_driver {
|
||||
struct device_driver driver;
|
||||
/* Called when the parent device sits through a bus reset. */
|
||||
void (*update) (struct fw_unit *unit);
|
||||
const struct fw_device_id *id_table;
|
||||
};
|
||||
|
||||
static inline struct fw_driver *
|
||||
fw_driver(struct device_driver *drv)
|
||||
{
|
||||
return container_of(drv, struct fw_driver, driver);
|
||||
}
|
||||
|
||||
extern const struct file_operations fw_device_ops;
|
||||
|
||||
#endif /* __fw_device_h */
|
||||
|
|
@ -0,0 +1,163 @@
|
|||
/*
|
||||
* Isochronous IO functionality
|
||||
*
|
||||
* 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"
|
||||
#include "fw-device.h"
|
||||
|
||||
int
|
||||
fw_iso_buffer_init(struct fw_iso_buffer *buffer, struct fw_card *card,
|
||||
int page_count, enum dma_data_direction direction)
|
||||
{
|
||||
int i, j, retval = -ENOMEM;
|
||||
dma_addr_t address;
|
||||
|
||||
buffer->page_count = page_count;
|
||||
buffer->direction = direction;
|
||||
|
||||
buffer->pages = kmalloc(page_count * sizeof(buffer->pages[0]),
|
||||
GFP_KERNEL);
|
||||
if (buffer->pages == NULL)
|
||||
goto out;
|
||||
|
||||
for (i = 0; i < buffer->page_count; i++) {
|
||||
buffer->pages[i] = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO);
|
||||
if (buffer->pages[i] == NULL)
|
||||
goto out_pages;
|
||||
|
||||
address = dma_map_page(card->device, buffer->pages[i],
|
||||
0, PAGE_SIZE, direction);
|
||||
if (dma_mapping_error(address)) {
|
||||
__free_page(buffer->pages[i]);
|
||||
goto out_pages;
|
||||
}
|
||||
set_page_private(buffer->pages[i], address);
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
out_pages:
|
||||
for (j = 0; j < i; j++) {
|
||||
address = page_private(buffer->pages[j]);
|
||||
dma_unmap_page(card->device, address,
|
||||
PAGE_SIZE, DMA_TO_DEVICE);
|
||||
__free_page(buffer->pages[j]);
|
||||
}
|
||||
kfree(buffer->pages);
|
||||
out:
|
||||
buffer->pages = NULL;
|
||||
return retval;
|
||||
}
|
||||
|
||||
int fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma)
|
||||
{
|
||||
unsigned long uaddr;
|
||||
int i, retval;
|
||||
|
||||
uaddr = vma->vm_start;
|
||||
for (i = 0; i < buffer->page_count; i++) {
|
||||
retval = vm_insert_page(vma, uaddr, buffer->pages[i]);
|
||||
if (retval)
|
||||
return retval;
|
||||
uaddr += PAGE_SIZE;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void fw_iso_buffer_destroy(struct fw_iso_buffer *buffer,
|
||||
struct fw_card *card)
|
||||
{
|
||||
int i;
|
||||
dma_addr_t address;
|
||||
|
||||
for (i = 0; i < buffer->page_count; i++) {
|
||||
address = page_private(buffer->pages[i]);
|
||||
dma_unmap_page(card->device, address,
|
||||
PAGE_SIZE, DMA_TO_DEVICE);
|
||||
__free_page(buffer->pages[i]);
|
||||
}
|
||||
|
||||
kfree(buffer->pages);
|
||||
buffer->pages = NULL;
|
||||
}
|
||||
|
||||
struct fw_iso_context *
|
||||
fw_iso_context_create(struct fw_card *card, int type,
|
||||
int channel, int speed, size_t header_size,
|
||||
fw_iso_callback_t callback, void *callback_data)
|
||||
{
|
||||
struct fw_iso_context *ctx;
|
||||
|
||||
ctx = card->driver->allocate_iso_context(card, type, header_size);
|
||||
if (IS_ERR(ctx))
|
||||
return ctx;
|
||||
|
||||
ctx->card = card;
|
||||
ctx->type = type;
|
||||
ctx->channel = channel;
|
||||
ctx->speed = speed;
|
||||
ctx->header_size = header_size;
|
||||
ctx->callback = callback;
|
||||
ctx->callback_data = callback_data;
|
||||
|
||||
return ctx;
|
||||
}
|
||||
EXPORT_SYMBOL(fw_iso_context_create);
|
||||
|
||||
void fw_iso_context_destroy(struct fw_iso_context *ctx)
|
||||
{
|
||||
struct fw_card *card = ctx->card;
|
||||
|
||||
card->driver->free_iso_context(ctx);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_iso_context_destroy);
|
||||
|
||||
int
|
||||
fw_iso_context_start(struct fw_iso_context *ctx, int cycle, int sync, int tags)
|
||||
{
|
||||
return ctx->card->driver->start_iso(ctx, cycle, sync, tags);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_iso_context_start);
|
||||
|
||||
int
|
||||
fw_iso_context_queue(struct fw_iso_context *ctx,
|
||||
struct fw_iso_packet *packet,
|
||||
struct fw_iso_buffer *buffer,
|
||||
unsigned long payload)
|
||||
{
|
||||
struct fw_card *card = ctx->card;
|
||||
|
||||
return card->driver->queue_iso(ctx, packet, buffer, payload);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_iso_context_queue);
|
||||
|
||||
int
|
||||
fw_iso_context_stop(struct fw_iso_context *ctx)
|
||||
{
|
||||
return ctx->card->driver->stop_iso(ctx);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_iso_context_stop);
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,153 @@
|
|||
#ifndef __fw_ohci_h
|
||||
#define __fw_ohci_h
|
||||
|
||||
/* OHCI register map */
|
||||
|
||||
#define OHCI1394_Version 0x000
|
||||
#define OHCI1394_GUID_ROM 0x004
|
||||
#define OHCI1394_ATRetries 0x008
|
||||
#define OHCI1394_CSRData 0x00C
|
||||
#define OHCI1394_CSRCompareData 0x010
|
||||
#define OHCI1394_CSRControl 0x014
|
||||
#define OHCI1394_ConfigROMhdr 0x018
|
||||
#define OHCI1394_BusID 0x01C
|
||||
#define OHCI1394_BusOptions 0x020
|
||||
#define OHCI1394_GUIDHi 0x024
|
||||
#define OHCI1394_GUIDLo 0x028
|
||||
#define OHCI1394_ConfigROMmap 0x034
|
||||
#define OHCI1394_PostedWriteAddressLo 0x038
|
||||
#define OHCI1394_PostedWriteAddressHi 0x03C
|
||||
#define OHCI1394_VendorID 0x040
|
||||
#define OHCI1394_HCControlSet 0x050
|
||||
#define OHCI1394_HCControlClear 0x054
|
||||
#define OHCI1394_HCControl_BIBimageValid 0x80000000
|
||||
#define OHCI1394_HCControl_noByteSwapData 0x40000000
|
||||
#define OHCI1394_HCControl_programPhyEnable 0x00800000
|
||||
#define OHCI1394_HCControl_aPhyEnhanceEnable 0x00400000
|
||||
#define OHCI1394_HCControl_LPS 0x00080000
|
||||
#define OHCI1394_HCControl_postedWriteEnable 0x00040000
|
||||
#define OHCI1394_HCControl_linkEnable 0x00020000
|
||||
#define OHCI1394_HCControl_softReset 0x00010000
|
||||
#define OHCI1394_SelfIDBuffer 0x064
|
||||
#define OHCI1394_SelfIDCount 0x068
|
||||
#define OHCI1394_IRMultiChanMaskHiSet 0x070
|
||||
#define OHCI1394_IRMultiChanMaskHiClear 0x074
|
||||
#define OHCI1394_IRMultiChanMaskLoSet 0x078
|
||||
#define OHCI1394_IRMultiChanMaskLoClear 0x07C
|
||||
#define OHCI1394_IntEventSet 0x080
|
||||
#define OHCI1394_IntEventClear 0x084
|
||||
#define OHCI1394_IntMaskSet 0x088
|
||||
#define OHCI1394_IntMaskClear 0x08C
|
||||
#define OHCI1394_IsoXmitIntEventSet 0x090
|
||||
#define OHCI1394_IsoXmitIntEventClear 0x094
|
||||
#define OHCI1394_IsoXmitIntMaskSet 0x098
|
||||
#define OHCI1394_IsoXmitIntMaskClear 0x09C
|
||||
#define OHCI1394_IsoRecvIntEventSet 0x0A0
|
||||
#define OHCI1394_IsoRecvIntEventClear 0x0A4
|
||||
#define OHCI1394_IsoRecvIntMaskSet 0x0A8
|
||||
#define OHCI1394_IsoRecvIntMaskClear 0x0AC
|
||||
#define OHCI1394_InitialBandwidthAvailable 0x0B0
|
||||
#define OHCI1394_InitialChannelsAvailableHi 0x0B4
|
||||
#define OHCI1394_InitialChannelsAvailableLo 0x0B8
|
||||
#define OHCI1394_FairnessControl 0x0DC
|
||||
#define OHCI1394_LinkControlSet 0x0E0
|
||||
#define OHCI1394_LinkControlClear 0x0E4
|
||||
#define OHCI1394_LinkControl_rcvSelfID (1 << 9)
|
||||
#define OHCI1394_LinkControl_rcvPhyPkt (1 << 10)
|
||||
#define OHCI1394_LinkControl_cycleTimerEnable (1 << 20)
|
||||
#define OHCI1394_LinkControl_cycleMaster (1 << 21)
|
||||
#define OHCI1394_LinkControl_cycleSource (1 << 22)
|
||||
#define OHCI1394_NodeID 0x0E8
|
||||
#define OHCI1394_NodeID_idValid 0x80000000
|
||||
#define OHCI1394_PhyControl 0x0EC
|
||||
#define OHCI1394_PhyControl_Read(addr) (((addr) << 8) | 0x00008000)
|
||||
#define OHCI1394_PhyControl_ReadDone 0x80000000
|
||||
#define OHCI1394_PhyControl_ReadData(r) (((r) & 0x00ff0000) >> 16)
|
||||
#define OHCI1394_PhyControl_Write(addr, data) (((addr) << 8) | (data) | 0x00004000)
|
||||
#define OHCI1394_PhyControl_WriteDone 0x00004000
|
||||
#define OHCI1394_IsochronousCycleTimer 0x0F0
|
||||
#define OHCI1394_AsReqFilterHiSet 0x100
|
||||
#define OHCI1394_AsReqFilterHiClear 0x104
|
||||
#define OHCI1394_AsReqFilterLoSet 0x108
|
||||
#define OHCI1394_AsReqFilterLoClear 0x10C
|
||||
#define OHCI1394_PhyReqFilterHiSet 0x110
|
||||
#define OHCI1394_PhyReqFilterHiClear 0x114
|
||||
#define OHCI1394_PhyReqFilterLoSet 0x118
|
||||
#define OHCI1394_PhyReqFilterLoClear 0x11C
|
||||
#define OHCI1394_PhyUpperBound 0x120
|
||||
|
||||
#define OHCI1394_AsReqTrContextBase 0x180
|
||||
#define OHCI1394_AsReqTrContextControlSet 0x180
|
||||
#define OHCI1394_AsReqTrContextControlClear 0x184
|
||||
#define OHCI1394_AsReqTrCommandPtr 0x18C
|
||||
|
||||
#define OHCI1394_AsRspTrContextBase 0x1A0
|
||||
#define OHCI1394_AsRspTrContextControlSet 0x1A0
|
||||
#define OHCI1394_AsRspTrContextControlClear 0x1A4
|
||||
#define OHCI1394_AsRspTrCommandPtr 0x1AC
|
||||
|
||||
#define OHCI1394_AsReqRcvContextBase 0x1C0
|
||||
#define OHCI1394_AsReqRcvContextControlSet 0x1C0
|
||||
#define OHCI1394_AsReqRcvContextControlClear 0x1C4
|
||||
#define OHCI1394_AsReqRcvCommandPtr 0x1CC
|
||||
|
||||
#define OHCI1394_AsRspRcvContextBase 0x1E0
|
||||
#define OHCI1394_AsRspRcvContextControlSet 0x1E0
|
||||
#define OHCI1394_AsRspRcvContextControlClear 0x1E4
|
||||
#define OHCI1394_AsRspRcvCommandPtr 0x1EC
|
||||
|
||||
/* Isochronous transmit registers */
|
||||
#define OHCI1394_IsoXmitContextBase(n) (0x200 + 16 * (n))
|
||||
#define OHCI1394_IsoXmitContextControlSet(n) (0x200 + 16 * (n))
|
||||
#define OHCI1394_IsoXmitContextControlClear(n) (0x204 + 16 * (n))
|
||||
#define OHCI1394_IsoXmitCommandPtr(n) (0x20C + 16 * (n))
|
||||
|
||||
/* Isochronous receive registers */
|
||||
#define OHCI1394_IsoRcvContextBase(n) (0x400 + 32 * (n))
|
||||
#define OHCI1394_IsoRcvContextControlSet(n) (0x400 + 32 * (n))
|
||||
#define OHCI1394_IsoRcvContextControlClear(n) (0x404 + 32 * (n))
|
||||
#define OHCI1394_IsoRcvCommandPtr(n) (0x40C + 32 * (n))
|
||||
#define OHCI1394_IsoRcvContextMatch(n) (0x410 + 32 * (n))
|
||||
|
||||
/* Interrupts Mask/Events */
|
||||
#define OHCI1394_reqTxComplete 0x00000001
|
||||
#define OHCI1394_respTxComplete 0x00000002
|
||||
#define OHCI1394_ARRQ 0x00000004
|
||||
#define OHCI1394_ARRS 0x00000008
|
||||
#define OHCI1394_RQPkt 0x00000010
|
||||
#define OHCI1394_RSPkt 0x00000020
|
||||
#define OHCI1394_isochTx 0x00000040
|
||||
#define OHCI1394_isochRx 0x00000080
|
||||
#define OHCI1394_postedWriteErr 0x00000100
|
||||
#define OHCI1394_lockRespErr 0x00000200
|
||||
#define OHCI1394_selfIDComplete 0x00010000
|
||||
#define OHCI1394_busReset 0x00020000
|
||||
#define OHCI1394_phy 0x00080000
|
||||
#define OHCI1394_cycleSynch 0x00100000
|
||||
#define OHCI1394_cycle64Seconds 0x00200000
|
||||
#define OHCI1394_cycleLost 0x00400000
|
||||
#define OHCI1394_cycleInconsistent 0x00800000
|
||||
#define OHCI1394_unrecoverableError 0x01000000
|
||||
#define OHCI1394_cycleTooLong 0x02000000
|
||||
#define OHCI1394_phyRegRcvd 0x04000000
|
||||
#define OHCI1394_masterIntEnable 0x80000000
|
||||
|
||||
#define OHCI1394_evt_no_status 0x0
|
||||
#define OHCI1394_evt_long_packet 0x2
|
||||
#define OHCI1394_evt_missing_ack 0x3
|
||||
#define OHCI1394_evt_underrun 0x4
|
||||
#define OHCI1394_evt_overrun 0x5
|
||||
#define OHCI1394_evt_descriptor_read 0x6
|
||||
#define OHCI1394_evt_data_read 0x7
|
||||
#define OHCI1394_evt_data_write 0x8
|
||||
#define OHCI1394_evt_bus_reset 0x9
|
||||
#define OHCI1394_evt_timeout 0xa
|
||||
#define OHCI1394_evt_tcode_err 0xb
|
||||
#define OHCI1394_evt_reserved_b 0xc
|
||||
#define OHCI1394_evt_reserved_c 0xd
|
||||
#define OHCI1394_evt_unknown 0xe
|
||||
#define OHCI1394_evt_flushed 0xf
|
||||
|
||||
#define OHCI1394_phy_tcode 0xe
|
||||
|
||||
#endif /* __fw_ohci_h */
|
||||
File diff suppressed because it is too large
Load Diff
|
|
@ -0,0 +1,537 @@
|
|||
/*
|
||||
* Incremental bus scan, based on bus topology
|
||||
*
|
||||
* Copyright (C) 2004-2006 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/module.h>
|
||||
#include <linux/wait.h>
|
||||
#include <linux/errno.h>
|
||||
#include "fw-transaction.h"
|
||||
#include "fw-topology.h"
|
||||
|
||||
#define SELF_ID_PHY_ID(q) (((q) >> 24) & 0x3f)
|
||||
#define SELF_ID_EXTENDED(q) (((q) >> 23) & 0x01)
|
||||
#define SELF_ID_LINK_ON(q) (((q) >> 22) & 0x01)
|
||||
#define SELF_ID_GAP_COUNT(q) (((q) >> 16) & 0x3f)
|
||||
#define SELF_ID_PHY_SPEED(q) (((q) >> 14) & 0x03)
|
||||
#define SELF_ID_CONTENDER(q) (((q) >> 11) & 0x01)
|
||||
#define SELF_ID_PHY_INITIATOR(q) (((q) >> 1) & 0x01)
|
||||
#define SELF_ID_MORE_PACKETS(q) (((q) >> 0) & 0x01)
|
||||
|
||||
#define SELF_ID_EXT_SEQUENCE(q) (((q) >> 20) & 0x07)
|
||||
|
||||
static u32 *count_ports(u32 *sid, int *total_port_count, int *child_port_count)
|
||||
{
|
||||
u32 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 >> 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 (!SELF_ID_MORE_PACKETS(q))
|
||||
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 (!SELF_ID_EXTENDED(q) ||
|
||||
seq != SELF_ID_EXT_SEQUENCE(q))
|
||||
return NULL;
|
||||
|
||||
seq++;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static int get_port_type(u32 *sid, int port_index)
|
||||
{
|
||||
int index, shift;
|
||||
|
||||
index = (port_index + 5) / 8;
|
||||
shift = 16 - ((port_index + 5) & 7) * 2;
|
||||
return (sid[index] >> shift) & 0x03;
|
||||
}
|
||||
|
||||
static struct fw_node *fw_node_create(u32 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 = LOCAL_BUS | SELF_ID_PHY_ID(sid);
|
||||
node->link_on = SELF_ID_LINK_ON(sid);
|
||||
node->phy_speed = SELF_ID_PHY_SPEED(sid);
|
||||
node->port_count = port_count;
|
||||
|
||||
atomic_set(&node->ref_count, 1);
|
||||
INIT_LIST_HEAD(&node->link);
|
||||
|
||||
return node;
|
||||
}
|
||||
|
||||
/*
|
||||
* Compute the maximum hop count for this node and it's children. The
|
||||
* maximum hop count is the maximum number of connections between any
|
||||
* two nodes in the subtree rooted at this node. We need this for
|
||||
* setting the gap count. As we build the tree bottom up in
|
||||
* build_tree() below, this is fairly easy to do: for each node we
|
||||
* maintain the max hop count and the max depth, ie the number of hops
|
||||
* to the furthest leaf. Computing the max hop count breaks down into
|
||||
* two cases: either the path goes through this node, in which case
|
||||
* the hop count is the sum of the two biggest child depths plus 2.
|
||||
* Or it could be the case that the max hop path is entirely
|
||||
* containted in a child tree, in which case the max hop count is just
|
||||
* the max hop count of this child.
|
||||
*/
|
||||
static void update_hop_count(struct fw_node *node)
|
||||
{
|
||||
int depths[2] = { -1, -1 };
|
||||
int max_child_hops = 0;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < node->port_count; i++) {
|
||||
if (node->ports[i].node == NULL)
|
||||
continue;
|
||||
|
||||
if (node->ports[i].node->max_hops > max_child_hops)
|
||||
max_child_hops = node->ports[i].node->max_hops;
|
||||
|
||||
if (node->ports[i].node->max_depth > depths[0]) {
|
||||
depths[1] = depths[0];
|
||||
depths[0] = node->ports[i].node->max_depth;
|
||||
} else if (node->ports[i].node->max_depth > depths[1])
|
||||
depths[1] = node->ports[i].node->max_depth;
|
||||
}
|
||||
|
||||
node->max_depth = depths[0] + 1;
|
||||
node->max_hops = max(max_child_hops, depths[0] + depths[1] + 2);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* 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,
|
||||
u32 *sid, int self_id_count)
|
||||
{
|
||||
struct fw_node *node, *child, *local_node, *irm_node;
|
||||
struct list_head stack, *h;
|
||||
u32 *next_sid, *end, q;
|
||||
int i, port_count, child_port_count, phy_id, parent_count, stack_depth;
|
||||
int gap_count, topology_type;
|
||||
|
||||
local_node = NULL;
|
||||
node = NULL;
|
||||
INIT_LIST_HEAD(&stack);
|
||||
stack_depth = 0;
|
||||
end = sid + self_id_count;
|
||||
phy_id = 0;
|
||||
irm_node = NULL;
|
||||
gap_count = SELF_ID_GAP_COUNT(*sid);
|
||||
topology_type = 0;
|
||||
|
||||
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 != SELF_ID_PHY_ID(q)) {
|
||||
fw_error("PHY ID mismatch in self ID: %d != %d.\n",
|
||||
phy_id, SELF_ID_PHY_ID(q));
|
||||
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 (SELF_ID_CONTENDER(q))
|
||||
irm_node = node;
|
||||
|
||||
if (node->phy_speed == SCODE_BETA)
|
||||
topology_type |= FW_TOPOLOGY_B;
|
||||
else
|
||||
topology_type |= FW_TOPOLOGY_A;
|
||||
|
||||
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;
|
||||
|
||||
/*
|
||||
* If all PHYs does not report the same gap count
|
||||
* setting, we fall back to 63 which will force a gap
|
||||
* count reconfiguration and a reset.
|
||||
*/
|
||||
if (SELF_ID_GAP_COUNT(q) != gap_count)
|
||||
gap_count = 63;
|
||||
|
||||
update_hop_count(node);
|
||||
|
||||
sid = next_sid;
|
||||
phy_id++;
|
||||
}
|
||||
|
||||
card->root_node = node;
|
||||
card->irm_node = irm_node;
|
||||
card->gap_count = gap_count;
|
||||
card->topology_type = topology_type;
|
||||
|
||||
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, *next, *child, *parent;
|
||||
int i;
|
||||
|
||||
INIT_LIST_HEAD(&list);
|
||||
|
||||
fw_node_get(root);
|
||||
list_add_tail(&root->link, &list);
|
||||
parent = NULL;
|
||||
list_for_each_entry(node, &list, 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 {
|
||||
fw_node_get(child);
|
||||
list_add_tail(&child->link, &list);
|
||||
}
|
||||
}
|
||||
|
||||
callback(card, node, parent);
|
||||
}
|
||||
|
||||
list_for_each_entry_safe(node, next, &list, link)
|
||||
fw_node_put(node);
|
||||
}
|
||||
|
||||
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) {
|
||||
/* min() macro doesn't work here with gcc 3.4 */
|
||||
node->max_speed = parent->max_speed < node->phy_speed ?
|
||||
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)
|
||||
{
|
||||
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);
|
||||
|
||||
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;
|
||||
node0->max_hops = node1->max_hops;
|
||||
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;
|
||||
} 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);
|
||||
}
|
||||
}
|
||||
|
||||
node0 = fw_node(node0->link.next);
|
||||
node1 = fw_node(node1->link.next);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
update_topology_map(struct fw_card *card, u32 *self_ids, int self_id_count)
|
||||
{
|
||||
int node_count;
|
||||
|
||||
card->topology_map[1]++;
|
||||
node_count = (card->root_node->node_id & 0x3f) + 1;
|
||||
card->topology_map[2] = (node_count << 16) | self_id_count;
|
||||
card->topology_map[0] = (self_id_count + 2) << 16;
|
||||
memcpy(&card->topology_map[3], self_ids, self_id_count * 4);
|
||||
fw_compute_block_crc(card->topology_map);
|
||||
}
|
||||
|
||||
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;
|
||||
|
||||
fw_flush_transactions(card);
|
||||
|
||||
spin_lock_irqsave(&card->lock, flags);
|
||||
|
||||
/*
|
||||
* If the new topology has a different self_id_count the topology
|
||||
* changed, either nodes were added or removed. In that case we
|
||||
* reset the IRM reset counter.
|
||||
*/
|
||||
if (card->self_id_count != self_id_count)
|
||||
card->bm_retries = 0;
|
||||
|
||||
card->node_id = node_id;
|
||||
card->generation = generation;
|
||||
card->reset_jiffies = jiffies;
|
||||
schedule_delayed_work(&card->work, 0);
|
||||
|
||||
local_node = build_tree(card, self_ids, self_id_count);
|
||||
|
||||
update_topology_map(card, self_ids, self_id_count);
|
||||
|
||||
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);
|
||||
}
|
||||
|
||||
spin_unlock_irqrestore(&card->lock, flags);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_core_handle_bus_reset);
|
||||
|
|
@ -0,0 +1,92 @@
|
|||
/*
|
||||
* 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_TOPOLOGY_A = 0x01,
|
||||
FW_TOPOLOGY_B = 0x02,
|
||||
FW_TOPOLOGY_MIXED = 0x03,
|
||||
};
|
||||
|
||||
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 : 3; /* As in the self ID packet. */
|
||||
u8 max_speed : 5; /* Minimum of all phy-speeds and port speeds on
|
||||
* the path from the local node to this node. */
|
||||
u8 max_depth : 4; /* Maximum depth to any leaf node */
|
||||
u8 max_hops : 4; /* Max hops in this sub tree */
|
||||
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];
|
||||
};
|
||||
|
||||
static inline struct fw_node *
|
||||
fw_node(struct list_head *l)
|
||||
{
|
||||
return list_entry(l, struct fw_node, link);
|
||||
}
|
||||
|
||||
static inline struct fw_node *
|
||||
fw_node_get(struct fw_node *node)
|
||||
{
|
||||
atomic_inc(&node->ref_count);
|
||||
|
||||
return node;
|
||||
}
|
||||
|
||||
static 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);
|
||||
|
||||
int
|
||||
fw_compute_block_crc(u32 *block);
|
||||
|
||||
|
||||
#endif /* __fw_topology_h */
|
||||
|
|
@ -0,0 +1,910 @@
|
|||
/*
|
||||
* Core IEEE1394 transaction logic
|
||||
*
|
||||
* Copyright (C) 2004-2006 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/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"
|
||||
|
||||
#define HEADER_PRI(pri) ((pri) << 0)
|
||||
#define HEADER_TCODE(tcode) ((tcode) << 4)
|
||||
#define HEADER_RETRY(retry) ((retry) << 8)
|
||||
#define HEADER_TLABEL(tlabel) ((tlabel) << 10)
|
||||
#define HEADER_DESTINATION(destination) ((destination) << 16)
|
||||
#define HEADER_SOURCE(source) ((source) << 16)
|
||||
#define HEADER_RCODE(rcode) ((rcode) << 12)
|
||||
#define HEADER_OFFSET_HIGH(offset_high) ((offset_high) << 0)
|
||||
#define HEADER_DATA_LENGTH(length) ((length) << 16)
|
||||
#define HEADER_EXTENDED_TCODE(tcode) ((tcode) << 0)
|
||||
|
||||
#define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f)
|
||||
#define HEADER_GET_TLABEL(q) (((q) >> 10) & 0x3f)
|
||||
#define HEADER_GET_RCODE(q) (((q) >> 12) & 0x0f)
|
||||
#define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff)
|
||||
#define HEADER_GET_SOURCE(q) (((q) >> 16) & 0xffff)
|
||||
#define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff)
|
||||
#define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff)
|
||||
#define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff)
|
||||
|
||||
#define PHY_CONFIG_GAP_COUNT(gap_count) (((gap_count) << 16) | (1 << 22))
|
||||
#define PHY_CONFIG_ROOT_ID(node_id) ((((node_id) & 0x3f) << 24) | (1 << 23))
|
||||
#define PHY_IDENTIFIER(id) ((id) << 30)
|
||||
|
||||
static int
|
||||
close_transaction(struct fw_transaction *transaction,
|
||||
struct fw_card *card, int rcode,
|
||||
u32 *payload, size_t length)
|
||||
{
|
||||
struct fw_transaction *t;
|
||||
unsigned long flags;
|
||||
|
||||
spin_lock_irqsave(&card->lock, flags);
|
||||
list_for_each_entry(t, &card->transaction_list, link) {
|
||||
if (t == transaction) {
|
||||
list_del(&t->link);
|
||||
card->tlabel_mask &= ~(1 << t->tlabel);
|
||||
break;
|
||||
}
|
||||
}
|
||||
spin_unlock_irqrestore(&card->lock, flags);
|
||||
|
||||
if (&t->link != &card->transaction_list) {
|
||||
t->callback(card, rcode, payload, length, t->callback_data);
|
||||
return 0;
|
||||
}
|
||||
|
||||
return -ENOENT;
|
||||
}
|
||||
|
||||
/*
|
||||
* Only valid for transactions that are potentially pending (ie have
|
||||
* been sent).
|
||||
*/
|
||||
int
|
||||
fw_cancel_transaction(struct fw_card *card,
|
||||
struct fw_transaction *transaction)
|
||||
{
|
||||
/*
|
||||
* Cancel the packet transmission if it's still queued. That
|
||||
* will call the packet transmission callback which cancels
|
||||
* the transaction.
|
||||
*/
|
||||
|
||||
if (card->driver->cancel_packet(card, &transaction->packet) == 0)
|
||||
return 0;
|
||||
|
||||
/*
|
||||
* If the request packet has already been sent, we need to see
|
||||
* if the transaction is still pending and remove it in that case.
|
||||
*/
|
||||
|
||||
return close_transaction(transaction, card, RCODE_CANCELLED, NULL, 0);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_cancel_transaction);
|
||||
|
||||
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:
|
||||
close_transaction(t, card, RCODE_DATA_ERROR, NULL, 0);
|
||||
break;
|
||||
case ACK_TYPE_ERROR:
|
||||
close_transaction(t, card, RCODE_TYPE_ERROR, NULL, 0);
|
||||
break;
|
||||
default:
|
||||
/*
|
||||
* In this case the ack is really a juju specific
|
||||
* rcode, so just forward that to the callback.
|
||||
*/
|
||||
close_transaction(t, card, status, NULL, 0);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
|
||||
int node_id, int source_id, int generation, int speed,
|
||||
unsigned long long offset, void *payload, size_t length)
|
||||
{
|
||||
int ext_tcode;
|
||||
|
||||
if (tcode > 0x10) {
|
||||
ext_tcode = tcode - 0x10;
|
||||
tcode = TCODE_LOCK_REQUEST;
|
||||
} else
|
||||
ext_tcode = 0;
|
||||
|
||||
packet->header[0] =
|
||||
HEADER_RETRY(RETRY_X) |
|
||||
HEADER_TLABEL(tlabel) |
|
||||
HEADER_TCODE(tcode) |
|
||||
HEADER_DESTINATION(node_id);
|
||||
packet->header[1] =
|
||||
HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id);
|
||||
packet->header[2] =
|
||||
offset;
|
||||
|
||||
switch (tcode) {
|
||||
case TCODE_WRITE_QUADLET_REQUEST:
|
||||
packet->header[3] = *(u32 *)payload;
|
||||
packet->header_length = 16;
|
||||
packet->payload_length = 0;
|
||||
break;
|
||||
|
||||
case TCODE_LOCK_REQUEST:
|
||||
case TCODE_WRITE_BLOCK_REQUEST:
|
||||
packet->header[3] =
|
||||
HEADER_DATA_LENGTH(length) |
|
||||
HEADER_EXTENDED_TCODE(ext_tcode);
|
||||
packet->header_length = 16;
|
||||
packet->payload = payload;
|
||||
packet->payload_length = length;
|
||||
break;
|
||||
|
||||
case TCODE_READ_QUADLET_REQUEST:
|
||||
packet->header_length = 12;
|
||||
packet->payload_length = 0;
|
||||
break;
|
||||
|
||||
case TCODE_READ_BLOCK_REQUEST:
|
||||
packet->header[3] =
|
||||
HEADER_DATA_LENGTH(length) |
|
||||
HEADER_EXTENDED_TCODE(ext_tcode);
|
||||
packet->header_length = 16;
|
||||
packet->payload_length = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
packet->speed = speed;
|
||||
packet->generation = generation;
|
||||
packet->ack = 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* 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 destination node ID (bus ID and PHY ID concatenated)
|
||||
* @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,
|
||||
void *payload, size_t length,
|
||||
fw_transaction_callback_t callback, void *callback_data)
|
||||
{
|
||||
unsigned long flags;
|
||||
int tlabel, source;
|
||||
|
||||
/*
|
||||
* Bump the flush timer up 100ms first of all so we
|
||||
* don't race with a flush timer callback.
|
||||
*/
|
||||
|
||||
mod_timer(&card->flush_timer, jiffies + DIV_ROUND_UP(HZ, 10));
|
||||
|
||||
/*
|
||||
* Allocate tlabel from the bitmap and put the transaction on
|
||||
* the list while holding the card spinlock.
|
||||
*/
|
||||
|
||||
spin_lock_irqsave(&card->lock, flags);
|
||||
|
||||
source = card->node_id;
|
||||
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_request(&t->packet, tcode, t->tlabel,
|
||||
node_id, source, 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_phy_config(struct fw_card *card,
|
||||
int node_id, int generation, int gap_count)
|
||||
{
|
||||
u32 q;
|
||||
|
||||
q = PHY_IDENTIFIER(PHY_PACKET_CONFIG) |
|
||||
PHY_CONFIG_ROOT_ID(node_id) |
|
||||
PHY_CONFIG_GAP_COUNT(gap_count);
|
||||
|
||||
send_phy_packet(card, q, generation);
|
||||
}
|
||||
|
||||
void fw_flush_transactions(struct fw_card *card)
|
||||
{
|
||||
struct fw_transaction *t, *next;
|
||||
struct list_head list;
|
||||
unsigned long flags;
|
||||
|
||||
INIT_LIST_HEAD(&list);
|
||||
spin_lock_irqsave(&card->lock, flags);
|
||||
list_splice_init(&card->transaction_list, &list);
|
||||
card->tlabel_mask = 0;
|
||||
spin_unlock_irqrestore(&card->lock, flags);
|
||||
|
||||
list_for_each_entry_safe(t, next, &list, link) {
|
||||
card->driver->cancel_packet(card, &t->packet);
|
||||
|
||||
/*
|
||||
* At this point cancel_packet will never call the
|
||||
* transaction callback, since we just took all the
|
||||
* transactions out of the list. So do it here.
|
||||
*/
|
||||
t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data);
|
||||
}
|
||||
}
|
||||
|
||||
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);
|
||||
|
||||
const struct fw_address_region fw_low_memory_region =
|
||||
{ .start = 0x000000000000ULL, .end = 0x000100000000ULL, };
|
||||
const struct fw_address_region fw_high_memory_region =
|
||||
{ .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, };
|
||||
const struct fw_address_region fw_private_region =
|
||||
{ .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, };
|
||||
const struct fw_address_region fw_csr_region =
|
||||
{ .start = 0xfffff0000000ULL, .end = 0xfffff0000800ULL, };
|
||||
const struct fw_address_region fw_unit_space_region =
|
||||
{ .start = 0xfffff0000900ULL, .end = 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,
|
||||
const 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;
|
||||
u32 request_header[4];
|
||||
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);
|
||||
}
|
||||
|
||||
void
|
||||
fw_fill_response(struct fw_packet *response, u32 *request_header,
|
||||
int rcode, void *payload, size_t length)
|
||||
{
|
||||
int tcode, tlabel, extended_tcode, source, destination;
|
||||
|
||||
tcode = HEADER_GET_TCODE(request_header[0]);
|
||||
tlabel = HEADER_GET_TLABEL(request_header[0]);
|
||||
source = HEADER_GET_DESTINATION(request_header[0]);
|
||||
destination = HEADER_GET_SOURCE(request_header[1]);
|
||||
extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]);
|
||||
|
||||
response->header[0] =
|
||||
HEADER_RETRY(RETRY_1) |
|
||||
HEADER_TLABEL(tlabel) |
|
||||
HEADER_DESTINATION(destination);
|
||||
response->header[1] =
|
||||
HEADER_SOURCE(source) |
|
||||
HEADER_RCODE(rcode);
|
||||
response->header[2] = 0;
|
||||
|
||||
switch (tcode) {
|
||||
case TCODE_WRITE_QUADLET_REQUEST:
|
||||
case TCODE_WRITE_BLOCK_REQUEST:
|
||||
response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE);
|
||||
response->header_length = 12;
|
||||
response->payload_length = 0;
|
||||
break;
|
||||
|
||||
case TCODE_READ_QUADLET_REQUEST:
|
||||
response->header[0] |=
|
||||
HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE);
|
||||
if (payload != NULL)
|
||||
response->header[3] = *(u32 *)payload;
|
||||
else
|
||||
response->header[3] = 0;
|
||||
response->header_length = 16;
|
||||
response->payload_length = 0;
|
||||
break;
|
||||
|
||||
case TCODE_READ_BLOCK_REQUEST:
|
||||
case TCODE_LOCK_REQUEST:
|
||||
response->header[0] |= HEADER_TCODE(tcode + 2);
|
||||
response->header[3] =
|
||||
HEADER_DATA_LENGTH(length) |
|
||||
HEADER_EXTENDED_TCODE(extended_tcode);
|
||||
response->header_length = 16;
|
||||
response->payload = payload;
|
||||
response->payload_length = length;
|
||||
break;
|
||||
|
||||
default:
|
||||
BUG();
|
||||
return;
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(fw_fill_response);
|
||||
|
||||
static struct fw_request *
|
||||
allocate_request(struct fw_packet *p)
|
||||
{
|
||||
struct fw_request *request;
|
||||
u32 *data, length;
|
||||
int request_tcode, t;
|
||||
|
||||
request_tcode = HEADER_GET_TCODE(p->header[0]);
|
||||
switch (request_tcode) {
|
||||
case TCODE_WRITE_QUADLET_REQUEST:
|
||||
data = &p->header[3];
|
||||
length = 4;
|
||||
break;
|
||||
|
||||
case TCODE_WRITE_BLOCK_REQUEST:
|
||||
case TCODE_LOCK_REQUEST:
|
||||
data = p->payload;
|
||||
length = HEADER_GET_DATA_LENGTH(p->header[3]);
|
||||
break;
|
||||
|
||||
case TCODE_READ_QUADLET_REQUEST:
|
||||
data = NULL;
|
||||
length = 4;
|
||||
break;
|
||||
|
||||
case TCODE_READ_BLOCK_REQUEST:
|
||||
data = NULL;
|
||||
length = HEADER_GET_DATA_LENGTH(p->header[3]);
|
||||
break;
|
||||
|
||||
default:
|
||||
BUG();
|
||||
return NULL;
|
||||
}
|
||||
|
||||
request = kmalloc(sizeof(*request) + length, GFP_ATOMIC);
|
||||
if (request == NULL)
|
||||
return NULL;
|
||||
|
||||
t = (p->timestamp & 0x1fff) + 4000;
|
||||
if (t >= 8000)
|
||||
t = (p->timestamp & ~0x1fff) + 0x2000 + t - 8000;
|
||||
else
|
||||
t = (p->timestamp & ~0x1fff) + t;
|
||||
|
||||
request->response.speed = p->speed;
|
||||
request->response.timestamp = t;
|
||||
request->response.generation = p->generation;
|
||||
request->response.ack = 0;
|
||||
request->response.callback = free_response_callback;
|
||||
request->ack = p->ack;
|
||||
request->length = length;
|
||||
if (data)
|
||||
memcpy(request->data, data, length);
|
||||
|
||||
memcpy(request->request_header, p->header, sizeof(p->header));
|
||||
|
||||
return request;
|
||||
}
|
||||
|
||||
void
|
||||
fw_send_response(struct fw_card *card, struct fw_request *request, int rcode)
|
||||
{
|
||||
/*
|
||||
* 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;
|
||||
|
||||
if (rcode == RCODE_COMPLETE)
|
||||
fw_fill_response(&request->response, request->request_header,
|
||||
rcode, request->data, request->length);
|
||||
else
|
||||
fw_fill_response(&request->response, request->request_header,
|
||||
rcode, NULL, 0);
|
||||
|
||||
card->driver->send_response(card, &request->response);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_send_response);
|
||||
|
||||
void
|
||||
fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
|
||||
{
|
||||
struct fw_address_handler *handler;
|
||||
struct fw_request *request;
|
||||
unsigned long long offset;
|
||||
unsigned long flags;
|
||||
int tcode, destination, source;
|
||||
|
||||
if (p->payload_length > 2048) {
|
||||
/* FIXME: send error response. */
|
||||
return;
|
||||
}
|
||||
|
||||
if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
|
||||
return;
|
||||
|
||||
request = allocate_request(p);
|
||||
if (request == NULL) {
|
||||
/* FIXME: send statically allocated busy packet. */
|
||||
return;
|
||||
}
|
||||
|
||||
offset =
|
||||
((unsigned long long)
|
||||
HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | p->header[2];
|
||||
tcode = HEADER_GET_TCODE(p->header[0]);
|
||||
destination = HEADER_GET_DESTINATION(p->header[0]);
|
||||
source = HEADER_GET_SOURCE(p->header[0]);
|
||||
|
||||
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,
|
||||
tcode, destination, source,
|
||||
p->generation, p->speed, offset,
|
||||
request->data, request->length,
|
||||
handler->callback_data);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_core_handle_request);
|
||||
|
||||
void
|
||||
fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
|
||||
{
|
||||
struct fw_transaction *t;
|
||||
unsigned long flags;
|
||||
u32 *data;
|
||||
size_t data_length;
|
||||
int tcode, tlabel, destination, source, rcode;
|
||||
|
||||
tcode = HEADER_GET_TCODE(p->header[0]);
|
||||
tlabel = HEADER_GET_TLABEL(p->header[0]);
|
||||
destination = HEADER_GET_DESTINATION(p->header[0]);
|
||||
source = HEADER_GET_SOURCE(p->header[1]);
|
||||
rcode = HEADER_GET_RCODE(p->header[1]);
|
||||
|
||||
spin_lock_irqsave(&card->lock, flags);
|
||||
list_for_each_entry(t, &card->transaction_list, link) {
|
||||
if (t->node_id == source && t->tlabel == tlabel) {
|
||||
list_del(&t->link);
|
||||
card->tlabel_mask &= ~(1 << t->tlabel);
|
||||
break;
|
||||
}
|
||||
}
|
||||
spin_unlock_irqrestore(&card->lock, flags);
|
||||
|
||||
if (&t->link == &card->transaction_list) {
|
||||
fw_notify("Unsolicited response (source %x, tlabel %x)\n",
|
||||
source, tlabel);
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* FIXME: sanity check packet, is length correct, does tcodes
|
||||
* and addresses match.
|
||||
*/
|
||||
|
||||
switch (tcode) {
|
||||
case TCODE_READ_QUADLET_RESPONSE:
|
||||
data = (u32 *) &p->header[3];
|
||||
data_length = 4;
|
||||
break;
|
||||
|
||||
case TCODE_WRITE_RESPONSE:
|
||||
data = NULL;
|
||||
data_length = 0;
|
||||
break;
|
||||
|
||||
case TCODE_READ_BLOCK_RESPONSE:
|
||||
case TCODE_LOCK_RESPONSE:
|
||||
data = p->payload;
|
||||
data_length = HEADER_GET_DATA_LENGTH(p->header[3]);
|
||||
break;
|
||||
|
||||
default:
|
||||
/* Should never happen, this is just to shut up gcc. */
|
||||
data = NULL;
|
||||
data_length = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
t->callback(card, rcode, data, data_length, t->callback_data);
|
||||
}
|
||||
EXPORT_SYMBOL(fw_core_handle_response);
|
||||
|
||||
const struct fw_address_region topology_map_region =
|
||||
{ .start = 0xfffff0001000ull, .end = 0xfffff0001400ull, };
|
||||
|
||||
static void
|
||||
handle_topology_map(struct fw_card *card, struct fw_request *request,
|
||||
int tcode, int destination, int source,
|
||||
int generation, int speed,
|
||||
unsigned long long offset,
|
||||
void *payload, size_t length, void *callback_data)
|
||||
{
|
||||
int i, start, end;
|
||||
u32 *map;
|
||||
|
||||
if (!TCODE_IS_READ_REQUEST(tcode)) {
|
||||
fw_send_response(card, request, RCODE_TYPE_ERROR);
|
||||
return;
|
||||
}
|
||||
|
||||
if ((offset & 3) > 0 || (length & 3) > 0) {
|
||||
fw_send_response(card, request, RCODE_ADDRESS_ERROR);
|
||||
return;
|
||||
}
|
||||
|
||||
start = (offset - topology_map_region.start) / 4;
|
||||
end = start + length / 4;
|
||||
map = payload;
|
||||
|
||||
for (i = 0; i < length / 4; i++)
|
||||
map[i] = cpu_to_be32(card->topology_map[start + i]);
|
||||
|
||||
fw_send_response(card, request, RCODE_COMPLETE);
|
||||
}
|
||||
|
||||
static struct fw_address_handler topology_map = {
|
||||
.length = 0x200,
|
||||
.address_callback = handle_topology_map,
|
||||
};
|
||||
|
||||
const struct fw_address_region registers_region =
|
||||
{ .start = 0xfffff0000000ull, .end = 0xfffff0000400ull, };
|
||||
|
||||
static void
|
||||
handle_registers(struct fw_card *card, struct fw_request *request,
|
||||
int tcode, int destination, int source,
|
||||
int generation, int speed,
|
||||
unsigned long long offset,
|
||||
void *payload, size_t length, void *callback_data)
|
||||
{
|
||||
int reg = offset - CSR_REGISTER_BASE;
|
||||
unsigned long long bus_time;
|
||||
__be32 *data = payload;
|
||||
|
||||
switch (reg) {
|
||||
case CSR_CYCLE_TIME:
|
||||
case CSR_BUS_TIME:
|
||||
if (!TCODE_IS_READ_REQUEST(tcode) || length != 4) {
|
||||
fw_send_response(card, request, RCODE_TYPE_ERROR);
|
||||
break;
|
||||
}
|
||||
|
||||
bus_time = card->driver->get_bus_time(card);
|
||||
if (reg == CSR_CYCLE_TIME)
|
||||
*data = cpu_to_be32(bus_time);
|
||||
else
|
||||
*data = cpu_to_be32(bus_time >> 25);
|
||||
fw_send_response(card, request, RCODE_COMPLETE);
|
||||
break;
|
||||
|
||||
case CSR_BUS_MANAGER_ID:
|
||||
case CSR_BANDWIDTH_AVAILABLE:
|
||||
case CSR_CHANNELS_AVAILABLE_HI:
|
||||
case CSR_CHANNELS_AVAILABLE_LO:
|
||||
/*
|
||||
* FIXME: these are handled by the OHCI hardware and
|
||||
* the stack never sees these request. If we add
|
||||
* support for a new type of controller that doesn't
|
||||
* handle this in hardware we need to deal with these
|
||||
* transactions.
|
||||
*/
|
||||
BUG();
|
||||
break;
|
||||
|
||||
case CSR_BUSY_TIMEOUT:
|
||||
/* FIXME: Implement this. */
|
||||
default:
|
||||
fw_send_response(card, request, RCODE_ADDRESS_ERROR);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
static struct fw_address_handler registers = {
|
||||
.length = 0x400,
|
||||
.address_callback = handle_registers,
|
||||
};
|
||||
|
||||
MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
|
||||
MODULE_DESCRIPTION("Core IEEE1394 transaction logic");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
static const u32 vendor_textual_descriptor[] = {
|
||||
/* textual descriptor leaf () */
|
||||
0x00060000,
|
||||
0x00000000,
|
||||
0x00000000,
|
||||
0x4c696e75, /* L i n u */
|
||||
0x78204669, /* x F i */
|
||||
0x72657769, /* r e w i */
|
||||
0x72650000, /* r e */
|
||||
};
|
||||
|
||||
static const u32 model_textual_descriptor[] = {
|
||||
/* model descriptor leaf () */
|
||||
0x00030000,
|
||||
0x00000000,
|
||||
0x00000000,
|
||||
0x4a756a75, /* J u j u */
|
||||
};
|
||||
|
||||
static struct fw_descriptor vendor_id_descriptor = {
|
||||
.length = ARRAY_SIZE(vendor_textual_descriptor),
|
||||
.immediate = 0x03d00d1e,
|
||||
.key = 0x81000000,
|
||||
.data = vendor_textual_descriptor,
|
||||
};
|
||||
|
||||
static struct fw_descriptor model_id_descriptor = {
|
||||
.length = ARRAY_SIZE(model_textual_descriptor),
|
||||
.immediate = 0x17000001,
|
||||
.key = 0x81000000,
|
||||
.data = model_textual_descriptor,
|
||||
};
|
||||
|
||||
static int __init fw_core_init(void)
|
||||
{
|
||||
int retval;
|
||||
|
||||
retval = bus_register(&fw_bus_type);
|
||||
if (retval < 0)
|
||||
return retval;
|
||||
|
||||
fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops);
|
||||
if (fw_cdev_major < 0) {
|
||||
bus_unregister(&fw_bus_type);
|
||||
return fw_cdev_major;
|
||||
}
|
||||
|
||||
retval = fw_core_add_address_handler(&topology_map,
|
||||
&topology_map_region);
|
||||
BUG_ON(retval < 0);
|
||||
|
||||
retval = fw_core_add_address_handler(®isters,
|
||||
®isters_region);
|
||||
BUG_ON(retval < 0);
|
||||
|
||||
/* Add the vendor textual descriptor. */
|
||||
retval = fw_core_add_descriptor(&vendor_id_descriptor);
|
||||
BUG_ON(retval < 0);
|
||||
retval = fw_core_add_descriptor(&model_id_descriptor);
|
||||
BUG_ON(retval < 0);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit fw_core_cleanup(void)
|
||||
{
|
||||
unregister_chrdev(fw_cdev_major, "firewire");
|
||||
bus_unregister(&fw_bus_type);
|
||||
}
|
||||
|
||||
module_init(fw_core_init);
|
||||
module_exit(fw_core_cleanup);
|
||||
|
|
@ -0,0 +1,458 @@
|
|||
/*
|
||||
* 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_transaction_h
|
||||
#define __fw_transaction_h
|
||||
|
||||
#include <linux/device.h>
|
||||
#include <linux/timer.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/dma-mapping.h>
|
||||
#include <linux/firewire-constants.h>
|
||||
|
||||
#define TCODE_IS_READ_REQUEST(tcode) (((tcode) & ~1) == 4)
|
||||
#define TCODE_IS_BLOCK_PACKET(tcode) (((tcode) & 1) != 0)
|
||||
#define TCODE_IS_REQUEST(tcode) (((tcode) & 2) == 0)
|
||||
#define TCODE_IS_RESPONSE(tcode) (((tcode) & 2) != 0)
|
||||
#define TCODE_HAS_REQUEST_DATA(tcode) (((tcode) & 12) != 4)
|
||||
#define TCODE_HAS_RESPONSE_DATA(tcode) (((tcode) & 12) != 0)
|
||||
|
||||
#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
|
||||
|
||||
/* Bit fields _within_ the PHY registers. */
|
||||
#define PHY_LINK_ACTIVE 0x80
|
||||
#define PHY_CONTENDER 0x40
|
||||
#define PHY_BUS_RESET 0x40
|
||||
#define PHY_BUS_SHORT_RESET 0x40
|
||||
|
||||
#define CSR_REGISTER_BASE 0xfffff0000000ULL
|
||||
|
||||
/* register offsets relative to CSR_REGISTER_BASE */
|
||||
#define CSR_STATE_CLEAR 0x0
|
||||
#define CSR_STATE_SET 0x4
|
||||
#define CSR_NODE_IDS 0x8
|
||||
#define CSR_RESET_START 0xc
|
||||
#define CSR_SPLIT_TIMEOUT_HI 0x18
|
||||
#define CSR_SPLIT_TIMEOUT_LO 0x1c
|
||||
#define CSR_CYCLE_TIME 0x200
|
||||
#define CSR_BUS_TIME 0x204
|
||||
#define CSR_BUSY_TIMEOUT 0x210
|
||||
#define CSR_BUS_MANAGER_ID 0x21c
|
||||
#define CSR_BANDWIDTH_AVAILABLE 0x220
|
||||
#define CSR_CHANNELS_AVAILABLE 0x224
|
||||
#define CSR_CHANNELS_AVAILABLE_HI 0x224
|
||||
#define CSR_CHANNELS_AVAILABLE_LO 0x228
|
||||
#define CSR_BROADCAST_CHANNEL 0x234
|
||||
#define CSR_CONFIG_ROM 0x400
|
||||
#define CSR_CONFIG_ROM_END 0x800
|
||||
#define CSR_FCP_COMMAND 0xB00
|
||||
#define CSR_FCP_RESPONSE 0xD00
|
||||
#define CSR_FCP_END 0xF00
|
||||
#define CSR_TOPOLOGY_MAP 0x1000
|
||||
#define CSR_TOPOLOGY_MAP_END 0x1400
|
||||
#define CSR_SPEED_MAP 0x2000
|
||||
#define CSR_SPEED_MAP_END 0x3000
|
||||
|
||||
#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 immediate;
|
||||
u32 key;
|
||||
const 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,
|
||||
void *data,
|
||||
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,
|
||||
void *data, 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;
|
||||
void *payload;
|
||||
size_t payload_length;
|
||||
u32 timestamp;
|
||||
|
||||
/*
|
||||
* 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;
|
||||
int ack;
|
||||
struct list_head link;
|
||||
void *driver_data;
|
||||
};
|
||||
|
||||
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;
|
||||
};
|
||||
|
||||
static 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 const struct fw_address_region fw_low_memory_region;
|
||||
extern const struct fw_address_region fw_high_memory_region;
|
||||
extern const struct fw_address_region fw_private_region;
|
||||
extern const struct fw_address_region fw_csr_region;
|
||||
extern const struct fw_address_region fw_unit_space_region;
|
||||
|
||||
int fw_core_add_address_handler(struct fw_address_handler *handler,
|
||||
const struct fw_address_region *region);
|
||||
void fw_core_remove_address_handler(struct fw_address_handler *handler);
|
||||
void fw_fill_response(struct fw_packet *response, u32 *request_header,
|
||||
int rcode, void *payload, size_t length);
|
||||
void fw_send_response(struct fw_card *card,
|
||||
struct fw_request *request, int rcode);
|
||||
|
||||
extern struct bus_type fw_bus_type;
|
||||
|
||||
struct fw_card {
|
||||
const struct fw_card_driver *driver;
|
||||
struct device *device;
|
||||
struct kref kref;
|
||||
|
||||
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;
|
||||
struct timer_list flush_timer;
|
||||
unsigned long reset_jiffies;
|
||||
|
||||
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 plus 3 words for the topology map header.
|
||||
*/
|
||||
int self_id_count;
|
||||
u32 topology_map[252 + 3];
|
||||
|
||||
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 gap_count;
|
||||
int topology_type;
|
||||
|
||||
int index;
|
||||
|
||||
struct list_head link;
|
||||
|
||||
/* Work struct for BM duties. */
|
||||
struct delayed_work work;
|
||||
int bm_retries;
|
||||
int bm_generation;
|
||||
};
|
||||
|
||||
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
|
||||
|
||||
#define FW_ISO_CONTEXT_MATCH_TAG0 1
|
||||
#define FW_ISO_CONTEXT_MATCH_TAG1 2
|
||||
#define FW_ISO_CONTEXT_MATCH_TAG2 4
|
||||
#define FW_ISO_CONTEXT_MATCH_TAG3 8
|
||||
#define FW_ISO_CONTEXT_MATCH_ALL_TAGS 15
|
||||
|
||||
struct fw_iso_context;
|
||||
|
||||
typedef void (*fw_iso_callback_t)(struct fw_iso_context *context,
|
||||
u32 cycle,
|
||||
size_t header_length,
|
||||
void *header,
|
||||
void *data);
|
||||
|
||||
/*
|
||||
* An iso buffer is just a set of pages mapped for DMA in the
|
||||
* specified direction. Since the pages are to be used for DMA, they
|
||||
* are not mapped into the kernel virtual address space. We store the
|
||||
* DMA address in the page private. The helper function
|
||||
* fw_iso_buffer_map() will map the pages into a given vma.
|
||||
*/
|
||||
|
||||
struct fw_iso_buffer {
|
||||
enum dma_data_direction direction;
|
||||
struct page **pages;
|
||||
int page_count;
|
||||
};
|
||||
|
||||
struct fw_iso_context {
|
||||
struct fw_card *card;
|
||||
int type;
|
||||
int channel;
|
||||
int speed;
|
||||
size_t header_size;
|
||||
fw_iso_callback_t callback;
|
||||
void *callback_data;
|
||||
};
|
||||
|
||||
int
|
||||
fw_iso_buffer_init(struct fw_iso_buffer *buffer,
|
||||
struct fw_card *card,
|
||||
int page_count,
|
||||
enum dma_data_direction direction);
|
||||
int
|
||||
fw_iso_buffer_map(struct fw_iso_buffer *buffer, struct vm_area_struct *vma);
|
||||
void
|
||||
fw_iso_buffer_destroy(struct fw_iso_buffer *buffer, struct fw_card *card);
|
||||
|
||||
struct fw_iso_context *
|
||||
fw_iso_context_create(struct fw_card *card, int type,
|
||||
int channel, int speed, size_t header_size,
|
||||
fw_iso_callback_t callback, void *callback_data);
|
||||
|
||||
void
|
||||
fw_iso_context_destroy(struct fw_iso_context *ctx);
|
||||
|
||||
int
|
||||
fw_iso_context_queue(struct fw_iso_context *ctx,
|
||||
struct fw_iso_packet *packet,
|
||||
struct fw_iso_buffer *buffer,
|
||||
unsigned long payload);
|
||||
|
||||
int
|
||||
fw_iso_context_start(struct fw_iso_context *ctx,
|
||||
int cycle, int sync, int tags);
|
||||
|
||||
int
|
||||
fw_iso_context_stop(struct fw_iso_context *ctx);
|
||||
|
||||
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);
|
||||
/* Calling cancel is valid once a packet has been submitted. */
|
||||
int (*cancel_packet)(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);
|
||||
|
||||
u64 (*get_bus_time)(struct fw_card *card);
|
||||
|
||||
struct fw_iso_context *
|
||||
(*allocate_iso_context)(struct fw_card *card,
|
||||
int type, size_t header_size);
|
||||
void (*free_iso_context)(struct fw_iso_context *ctx);
|
||||
|
||||
int (*start_iso)(struct fw_iso_context *ctx,
|
||||
s32 cycle, u32 sync, u32 tags);
|
||||
|
||||
int (*queue_iso)(struct fw_iso_context *ctx,
|
||||
struct fw_iso_packet *packet,
|
||||
struct fw_iso_buffer *buffer,
|
||||
unsigned long payload);
|
||||
|
||||
int (*stop_iso)(struct fw_iso_context *ctx);
|
||||
};
|
||||
|
||||
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,
|
||||
void *data, size_t length,
|
||||
fw_transaction_callback_t callback, void *callback_data);
|
||||
|
||||
int fw_cancel_transaction(struct fw_card *card,
|
||||
struct fw_transaction *transaction);
|
||||
|
||||
void fw_flush_transactions(struct fw_card *card);
|
||||
|
||||
void fw_send_phy_config(struct fw_card *card,
|
||||
int node_id, int generation, int gap_count);
|
||||
|
||||
/*
|
||||
* 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 */
|
||||
|
||||
void
|
||||
fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver,
|
||||
struct device *device);
|
||||
int
|
||||
fw_card_add(struct fw_card *card,
|
||||
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, struct fw_packet *request);
|
||||
|
||||
void
|
||||
fw_core_handle_response(struct fw_card *card, struct fw_packet *packet);
|
||||
|
||||
#endif /* __fw_transaction_h */
|
||||
|
|
@ -1,6 +1,8 @@
|
|||
menu "IEEE 1394 (FireWire) support"
|
||||
depends on PCI || BROKEN
|
||||
|
||||
source "drivers/firewire/Kconfig"
|
||||
|
||||
config IEEE1394
|
||||
tristate "IEEE 1394 (FireWire) support"
|
||||
depends on PCI || BROKEN
|
||||
|
|
|
|||
|
|
@ -0,0 +1,28 @@
|
|||
/*
|
||||
* crc-itu-t.h - CRC ITU-T V.41 routine
|
||||
*
|
||||
* Implements the standard CRC ITU-T V.41:
|
||||
* Width 16
|
||||
* Poly 0x0x1021 (x^16 + x^12 + x^15 + 1)
|
||||
* Init 0
|
||||
*
|
||||
* This source code is licensed under the GNU General Public License,
|
||||
* Version 2. See the file COPYING for more details.
|
||||
*/
|
||||
|
||||
#ifndef CRC_ITU_T_H
|
||||
#define CRC_ITU_T_H
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
extern u16 const crc_itu_t_table[256];
|
||||
|
||||
extern u16 crc_itu_t(u16 crc, const u8 *buffer, size_t len);
|
||||
|
||||
static inline u16 crc_itu_t_byte(u16 crc, const u8 data)
|
||||
{
|
||||
return (crc << 8) ^ crc_itu_t_table[((crc >> 8) ^ data) & 0xff];
|
||||
}
|
||||
|
||||
#endif /* CRC_ITU_T_H */
|
||||
|
||||
|
|
@ -0,0 +1,229 @@
|
|||
/*
|
||||
* Char device interface.
|
||||
*
|
||||
* Copyright (C) 2005-2006 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 _LINUX_FIREWIRE_CDEV_H
|
||||
#define _LINUX_FIREWIRE_CDEV_H
|
||||
|
||||
#include <linux/ioctl.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/firewire-constants.h>
|
||||
|
||||
#define FW_CDEV_EVENT_BUS_RESET 0x00
|
||||
#define FW_CDEV_EVENT_RESPONSE 0x01
|
||||
#define FW_CDEV_EVENT_REQUEST 0x02
|
||||
#define FW_CDEV_EVENT_ISO_INTERRUPT 0x03
|
||||
|
||||
/* The 'closure' fields are for user space to use. Data passed in the
|
||||
* 'closure' field for a request will be returned in the corresponding
|
||||
* event. It's a 64-bit type so that it's a fixed size type big
|
||||
* enough to hold a pointer on all platforms. */
|
||||
|
||||
struct fw_cdev_event_common {
|
||||
__u64 closure;
|
||||
__u32 type;
|
||||
};
|
||||
|
||||
struct fw_cdev_event_bus_reset {
|
||||
__u64 closure;
|
||||
__u32 type;
|
||||
__u32 node_id;
|
||||
__u32 local_node_id;
|
||||
__u32 bm_node_id;
|
||||
__u32 irm_node_id;
|
||||
__u32 root_node_id;
|
||||
__u32 generation;
|
||||
};
|
||||
|
||||
struct fw_cdev_event_response {
|
||||
__u64 closure;
|
||||
__u32 type;
|
||||
__u32 rcode;
|
||||
__u32 length;
|
||||
__u32 data[0];
|
||||
};
|
||||
|
||||
struct fw_cdev_event_request {
|
||||
__u64 closure;
|
||||
__u32 type;
|
||||
__u32 tcode;
|
||||
__u64 offset;
|
||||
__u32 handle;
|
||||
__u32 length;
|
||||
__u32 data[0];
|
||||
};
|
||||
|
||||
struct fw_cdev_event_iso_interrupt {
|
||||
__u64 closure;
|
||||
__u32 type;
|
||||
__u32 cycle;
|
||||
__u32 header_length; /* Length in bytes of following headers. */
|
||||
__u32 header[0];
|
||||
};
|
||||
|
||||
union fw_cdev_event {
|
||||
struct fw_cdev_event_common common;
|
||||
struct fw_cdev_event_bus_reset bus_reset;
|
||||
struct fw_cdev_event_response response;
|
||||
struct fw_cdev_event_request request;
|
||||
struct fw_cdev_event_iso_interrupt iso_interrupt;
|
||||
};
|
||||
|
||||
#define FW_CDEV_IOC_GET_INFO _IOWR('#', 0x00, struct fw_cdev_get_info)
|
||||
#define FW_CDEV_IOC_SEND_REQUEST _IOW('#', 0x01, struct fw_cdev_send_request)
|
||||
#define FW_CDEV_IOC_ALLOCATE _IOWR('#', 0x02, struct fw_cdev_allocate)
|
||||
#define FW_CDEV_IOC_DEALLOCATE _IOW('#', 0x03, struct fw_cdev_deallocate)
|
||||
#define FW_CDEV_IOC_SEND_RESPONSE _IOW('#', 0x04, struct fw_cdev_send_response)
|
||||
#define FW_CDEV_IOC_INITIATE_BUS_RESET _IOW('#', 0x05, struct fw_cdev_initiate_bus_reset)
|
||||
#define FW_CDEV_IOC_ADD_DESCRIPTOR _IOWR('#', 0x06, struct fw_cdev_add_descriptor)
|
||||
#define FW_CDEV_IOC_REMOVE_DESCRIPTOR _IOW('#', 0x07, struct fw_cdev_remove_descriptor)
|
||||
|
||||
#define FW_CDEV_IOC_CREATE_ISO_CONTEXT _IOWR('#', 0x08, struct fw_cdev_create_iso_context)
|
||||
#define FW_CDEV_IOC_QUEUE_ISO _IOWR('#', 0x09, struct fw_cdev_queue_iso)
|
||||
#define FW_CDEV_IOC_START_ISO _IOW('#', 0x0a, struct fw_cdev_start_iso)
|
||||
#define FW_CDEV_IOC_STOP_ISO _IOW('#', 0x0b, struct fw_cdev_stop_iso)
|
||||
|
||||
/* FW_CDEV_VERSION History
|
||||
*
|
||||
* 1 Feb 18, 2007: Initial version.
|
||||
*/
|
||||
#define FW_CDEV_VERSION 1
|
||||
|
||||
struct fw_cdev_get_info {
|
||||
/* The version field is just a running serial number. We
|
||||
* never break backwards compatibility. Userspace passes in
|
||||
* the version it expects and the kernel passes back the
|
||||
* highest version it can provide. Even if the structs in
|
||||
* this interface are extended in a later version, the kernel
|
||||
* will not copy back more data than what was present in the
|
||||
* interface version userspace expects. */
|
||||
__u32 version;
|
||||
|
||||
/* If non-zero, at most rom_length bytes of config rom will be
|
||||
* copied into that user space address. In either case,
|
||||
* rom_length is updated with the actual length of the config
|
||||
* rom. */
|
||||
__u32 rom_length;
|
||||
__u64 rom;
|
||||
|
||||
/* If non-zero, a fw_cdev_event_bus_reset struct will be
|
||||
* copied here with the current state of the bus. This does
|
||||
* not cause a bus reset to happen. The value of closure in
|
||||
* this and sub-sequent bus reset events is set to
|
||||
* bus_reset_closure. */
|
||||
__u64 bus_reset;
|
||||
__u64 bus_reset_closure;
|
||||
|
||||
/* The index of the card this devices belongs to. */
|
||||
__u32 card;
|
||||
};
|
||||
|
||||
struct fw_cdev_send_request {
|
||||
__u32 tcode;
|
||||
__u32 length;
|
||||
__u64 offset;
|
||||
__u64 closure;
|
||||
__u64 data;
|
||||
__u32 generation;
|
||||
};
|
||||
|
||||
struct fw_cdev_send_response {
|
||||
__u32 rcode;
|
||||
__u32 length;
|
||||
__u64 data;
|
||||
__u32 handle;
|
||||
};
|
||||
|
||||
struct fw_cdev_allocate {
|
||||
__u64 offset;
|
||||
__u64 closure;
|
||||
__u32 length;
|
||||
__u32 handle;
|
||||
};
|
||||
|
||||
struct fw_cdev_deallocate {
|
||||
__u32 handle;
|
||||
};
|
||||
|
||||
#define FW_CDEV_LONG_RESET 0
|
||||
#define FW_CDEV_SHORT_RESET 1
|
||||
|
||||
struct fw_cdev_initiate_bus_reset {
|
||||
__u32 type;
|
||||
};
|
||||
|
||||
struct fw_cdev_add_descriptor {
|
||||
__u32 immediate;
|
||||
__u32 key;
|
||||
__u64 data;
|
||||
__u32 length;
|
||||
__u32 handle;
|
||||
};
|
||||
|
||||
struct fw_cdev_remove_descriptor {
|
||||
__u32 handle;
|
||||
};
|
||||
|
||||
#define FW_CDEV_ISO_CONTEXT_TRANSMIT 0
|
||||
#define FW_CDEV_ISO_CONTEXT_RECEIVE 1
|
||||
|
||||
#define FW_CDEV_ISO_CONTEXT_MATCH_TAG0 1
|
||||
#define FW_CDEV_ISO_CONTEXT_MATCH_TAG1 2
|
||||
#define FW_CDEV_ISO_CONTEXT_MATCH_TAG2 4
|
||||
#define FW_CDEV_ISO_CONTEXT_MATCH_TAG3 8
|
||||
#define FW_CDEV_ISO_CONTEXT_MATCH_ALL_TAGS 15
|
||||
|
||||
struct fw_cdev_create_iso_context {
|
||||
__u32 type;
|
||||
__u32 header_size;
|
||||
__u32 channel;
|
||||
__u32 speed;
|
||||
__u64 closure;
|
||||
__u32 handle;
|
||||
};
|
||||
|
||||
struct fw_cdev_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];
|
||||
};
|
||||
|
||||
struct fw_cdev_queue_iso {
|
||||
__u64 packets;
|
||||
__u64 data;
|
||||
__u32 size;
|
||||
__u32 handle;
|
||||
};
|
||||
|
||||
struct fw_cdev_start_iso {
|
||||
__s32 cycle;
|
||||
__u32 sync;
|
||||
__u32 tags;
|
||||
__u32 handle;
|
||||
};
|
||||
|
||||
struct fw_cdev_stop_iso {
|
||||
__u32 handle;
|
||||
};
|
||||
|
||||
#endif /* _LINUX_FIREWIRE_CDEV_H */
|
||||
|
|
@ -0,0 +1,67 @@
|
|||
#ifndef _LINUX_FIREWIRE_CONSTANTS_H
|
||||
#define _LINUX_FIREWIRE_CONSTANTS_H
|
||||
|
||||
#define TCODE_WRITE_QUADLET_REQUEST 0x0
|
||||
#define TCODE_WRITE_BLOCK_REQUEST 0x1
|
||||
#define TCODE_WRITE_RESPONSE 0x2
|
||||
#define TCODE_READ_QUADLET_REQUEST 0x4
|
||||
#define TCODE_READ_BLOCK_REQUEST 0x5
|
||||
#define TCODE_READ_QUADLET_RESPONSE 0x6
|
||||
#define TCODE_READ_BLOCK_RESPONSE 0x7
|
||||
#define TCODE_CYCLE_START 0x8
|
||||
#define TCODE_LOCK_REQUEST 0x9
|
||||
#define TCODE_STREAM_DATA 0xa
|
||||
#define TCODE_LOCK_RESPONSE 0xb
|
||||
|
||||
#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 EXTCODE_VENDOR_DEPENDENT 0x7
|
||||
|
||||
/* Juju specific tcodes */
|
||||
#define TCODE_LOCK_MASK_SWAP (0x10 | EXTCODE_MASK_SWAP)
|
||||
#define TCODE_LOCK_COMPARE_SWAP (0x10 | EXTCODE_COMPARE_SWAP)
|
||||
#define TCODE_LOCK_FETCH_ADD (0x10 | EXTCODE_FETCH_ADD)
|
||||
#define TCODE_LOCK_LITTLE_ADD (0x10 | EXTCODE_LITTLE_ADD)
|
||||
#define TCODE_LOCK_BOUNDED_ADD (0x10 | EXTCODE_BOUNDED_ADD)
|
||||
#define TCODE_LOCK_WRAP_ADD (0x10 | EXTCODE_WRAP_ADD)
|
||||
#define TCODE_LOCK_VENDOR_DEPENDENT (0x10 | EXTCODE_VENDOR_DEPENDENT)
|
||||
|
||||
#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 RCODE_GENERATION 0x13
|
||||
#define RCODE_NO_ACK 0x14
|
||||
|
||||
#define SCODE_100 0x0
|
||||
#define SCODE_200 0x1
|
||||
#define SCODE_400 0x2
|
||||
#define SCODE_800 0x3
|
||||
#define SCODE_1600 0x4
|
||||
#define SCODE_3200 0x5
|
||||
#define SCODE_BETA 0x3
|
||||
|
||||
#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 RETRY_1 0x00
|
||||
#define RETRY_X 0x01
|
||||
#define RETRY_A 0x02
|
||||
#define RETRY_B 0x03
|
||||
|
||||
#endif /* _LINUX_FIREWIRE_CONSTANTS_H */
|
||||
|
|
@ -23,6 +23,14 @@ config CRC16
|
|||
the kernel tree does. Such modules that use library CRC16
|
||||
functions require M here.
|
||||
|
||||
config CRC_ITU_T
|
||||
tristate "CRC ITU-T V.41 functions"
|
||||
help
|
||||
This option is provided for the case where no in-kernel-tree
|
||||
modules require CRC ITU-T V.41 functions, but a module built outside
|
||||
the kernel tree does. Such modules that use library CRC ITU-T V.41
|
||||
functions require M here.
|
||||
|
||||
config CRC32
|
||||
tristate "CRC32 functions"
|
||||
default y
|
||||
|
|
|
|||
|
|
@ -41,6 +41,7 @@ endif
|
|||
obj-$(CONFIG_BITREVERSE) += bitrev.o
|
||||
obj-$(CONFIG_CRC_CCITT) += crc-ccitt.o
|
||||
obj-$(CONFIG_CRC16) += crc16.o
|
||||
obj-$(CONFIG_CRC_ITU_T) += crc-itu-t.o
|
||||
obj-$(CONFIG_CRC32) += crc32.o
|
||||
obj-$(CONFIG_LIBCRC32C) += libcrc32c.o
|
||||
obj-$(CONFIG_GENERIC_ALLOCATOR) += genalloc.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,69 @@
|
|||
/*
|
||||
* crc-itu-t.c
|
||||
*
|
||||
* This source code is licensed under the GNU General Public License,
|
||||
* Version 2. See the file COPYING for more details.
|
||||
*/
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/crc-itu-t.h>
|
||||
|
||||
/** CRC table for the CRC ITU-T V.41 0x0x1021 (x^16 + x^12 + x^15 + 1) */
|
||||
const u16 crc_itu_t_table[256] = {
|
||||
0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
|
||||
0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
|
||||
0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
|
||||
0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
|
||||
0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
|
||||
0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
|
||||
0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
|
||||
0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
|
||||
0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
|
||||
0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
|
||||
0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
|
||||
0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
|
||||
0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
|
||||
0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
|
||||
0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
|
||||
0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
|
||||
0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
|
||||
0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
|
||||
0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
|
||||
0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
|
||||
0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
|
||||
0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
|
||||
0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
|
||||
0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
|
||||
0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
|
||||
0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
|
||||
0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
|
||||
0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
|
||||
0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
|
||||
0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
|
||||
0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
|
||||
0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
|
||||
};
|
||||
|
||||
EXPORT_SYMBOL(crc_itu_t_table);
|
||||
|
||||
/**
|
||||
* crc_itu_t - Compute the CRC-ITU-T for the data buffer
|
||||
*
|
||||
* @crc: previous CRC value
|
||||
* @buffer: data pointer
|
||||
* @len: number of bytes in the buffer
|
||||
*
|
||||
* Returns the updated CRC value
|
||||
*/
|
||||
u16 crc_itu_t(u16 crc, const u8 *buffer, size_t len)
|
||||
{
|
||||
while (len--)
|
||||
crc = crc_itu_t_byte(crc, *buffer++);
|
||||
return crc;
|
||||
}
|
||||
EXPORT_SYMBOL(crc_itu_t);
|
||||
|
||||
MODULE_DESCRIPTION("CRC ITU-T V.41 calculations");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
Loading…
Reference in New Issue