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提交 c781c06d 编写于 作者: K Kristian Høgsberg 提交者： Stefan Richter
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firewire: Clean up comment style. 

Drop filenames from file preamble, drop editor annotations and
use standard indent style for block comments.
Signed-off-by: NKristian Hoegsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (fixed typo)
上级 e175569c
隐藏空白更改
内联 并排
Showing with 439 addition and 253 deletion
drivers/firewire/fw-card.c
浏览文件 @ c781c06d
/* -*- c-basic-offset: 8 -*-
*
* fw-card.c - card level functions
*
* Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
/*
* 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
......@@ -69,12 +66,14 @@ generate_config_rom (struct fw_card *card, size_t *config_rom_length)
static u32 config_rom[256];
int i, j, length;
/* Initialize contents of config rom buffer. On the OHCI
/*
* 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. */
* 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);
......@@ -143,9 +142,11 @@ fw_core_add_descriptor (struct fw_descriptor *desc)
{
size_t i;
/* Check descriptor is valid; the length of all blocks in the
/*
* Check descriptor is valid; the length of all blocks in the
* descriptor has to add up to exactly the length of the
* block. */
* block.
*/
i = 0;
while (i < desc->length)
i += (desc->data[i] >> 16) + 1;
......@@ -228,7 +229,8 @@ fw_card_bm_work(struct work_struct *work)
if (card->bm_generation + 1 == generation ||
(card->bm_generation != generation && grace)) {
/* This first step is to figure out who is IRM and
/*
* 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
......@@ -236,7 +238,8 @@ fw_card_bm_work(struct work_struct *work)
* 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. */
* next generation.
*/
irm_id = card->irm_node->node_id;
if (!card->irm_node->link_on) {
......@@ -260,8 +263,10 @@ fw_card_bm_work(struct work_struct *work)
wait_for_completion(&bmd.done);
if (bmd.rcode == RCODE_GENERATION) {
/* Another bus reset happened. Just return,
* the BM work has been rescheduled. */
/*
* Another bus reset happened. Just return,
* the BM work has been rescheduled.
*/
return;
}
......@@ -271,48 +276,62 @@ fw_card_bm_work(struct work_struct *work)
spin_lock_irqsave(&card->lock, flags);
if (bmd.rcode != RCODE_COMPLETE) {
/* The lock request failed, maybe the IRM
/*
* 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. */
* 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
/*
* 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. */
* 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
/*
* 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. */
* 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. */
/*
* 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. */
/*
* 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
/*
* 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. */
* packet for this node.
*/
new_root_id = root_id;
} else {
/* Current root has an active link layer and we
/*
* Current root has an active link layer and we
* successfully read the config rom, but it's not
* cycle master capable. */
* cycle master capable.
*/
new_root_id = card->local_node->node_id;
}
......@@ -324,9 +343,11 @@ fw_card_bm_work(struct work_struct *work)
else
gap_count = 63;
/* Finally, figure out if we should do a reset or not. If we've
/*
* 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. */
* 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))
......@@ -391,8 +412,10 @@ fw_card_add(struct fw_card *card,
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. */
/*
* 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);
down_write(&card_rwsem);
......@@ -405,11 +428,13 @@ fw_card_add(struct fw_card *card,
EXPORT_SYMBOL(fw_card_add);
/* The next few functions implements a dummy driver that use once a
/*
* 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. */
* dummy driver just fails all IO.
*/
static int
dummy_enable(struct fw_card *card, u32 *config_rom, size_t length)
......@@ -429,8 +454,10 @@ 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. */
/*
* We take the card out of card_list before setting the dummy
* driver, so this should never get called.
*/
BUG();
return -1;
}
......@@ -510,9 +537,11 @@ release_card(struct kref *kref)
kfree(card);
}
/* An assumption for fw_card_put() is that the card driver allocates
/*
* 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. */
* before the last ref is dropped.
*/
void
fw_card_put(struct fw_card *card)
{
......@@ -524,8 +553,6 @@ int
fw_core_initiate_bus_reset(struct fw_card *card, int short_reset)
{
int reg = short_reset ? 5 : 1;
/* The following values happen to be the same bit. However be
* explicit for clarity. */
int bit = short_reset ? PHY_BUS_SHORT_RESET : PHY_BUS_RESET;
return card->driver->update_phy_reg(card, reg, 0, bit);
......
drivers/firewire/fw-cdev.c
浏览文件 @ c781c06d
/* -*- c-basic-offset: 8 -*-
/*
* Char device for device raw access
*
* fw-device-cdev.c - Char device for device raw access
*
* Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
* 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
......@@ -36,9 +35,6 @@
#include "fw-topology.h"
#include "fw-device.h"
/* dequeue_event() just kfree()'s the event, so the event has to be
* the first field in the struct. */
struct client;
struct client_resource {
struct list_head link;
......@@ -46,6 +42,11 @@ struct client_resource {
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;
......@@ -691,13 +692,15 @@ static int ioctl_queue_iso(struct client *client, void *buffer)
if (ctx == NULL || request->handle != 0)
return -EINVAL;
/* If the user passes a non-NULL data pointer, has mmap()'ed
/*
* 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.*/
* and the request->data pointer is ignored.
*/
payload = (unsigned long)request->data - client->vm_start;
buffer_end = client->buffer.page_count << PAGE_SHIFT;
......@@ -720,8 +723,10 @@ static int ioctl_queue_iso(struct client *client, void *buffer)
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 */
/*
* 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;
......@@ -908,8 +913,10 @@ static int fw_device_op_release(struct inode *inode, struct file *file)
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. */
/*
* 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);
......
drivers/firewire/fw-device.c
浏览文件 @ c781c06d
/* -*- c-basic-offset: 8 -*-
*
* fw-device.c - Device probing and sysfs code.
/*
* Device probing and sysfs code.
*
* Copyright (C) 2005-2006 Kristian Hoegsberg <krh@bitplanet.net>
*
......@@ -174,8 +173,10 @@ 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. */
/*
* 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);
......@@ -421,34 +422,42 @@ static int read_bus_info_block(struct fw_device *device)
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
/*
* 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. */
* 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
/*
* 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. */
* start things off.
*/
length = i;
sp = 0;
stack[sp++] = 0xc0000005;
while (sp > 0) {
/* Pop the next block reference of the stack. The
/*
* 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. */
* block.
*/
key = stack[--sp];
i = key & 0xffffff;
if (i >= ARRAY_SIZE(rom))
/* The reference points outside the standard
* config rom area, something's fishy. */
/*
* The reference points outside the standard
* config rom area, something's fishy.
*/
return -1;
/* Read header quadlet for the block to get the length. */
......@@ -457,15 +466,19 @@ static int read_bus_info_block(struct fw_device *device)
end = i + (rom[i] >> 16) + 1;
i++;
if (end > ARRAY_SIZE(rom))
/* This block extends outside standard config
/*
* This block extends outside standard config
* area (and the array we're reading it
* into). That's broken, so ignore this
* device. */
* device.
*/
return -1;
/* Now read in the block. If this is a directory
/*
* 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. */
* it references another block, and push it in that case.
*/
while (i < end) {
if (read_rom(device, i, &rom[i]) != RCODE_COMPLETE)
return -1;
......@@ -516,8 +529,10 @@ static void create_units(struct fw_device *device)
if (key != (CSR_UNIT | CSR_DIRECTORY))
continue;
/* Get the address of the unit directory and try to
* match the drivers id_tables against it. */
/*
* 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");
......@@ -585,14 +600,16 @@ static struct device_type fw_device_type = {
.release = fw_device_release,
};
/* These defines control the retry behavior for reading the config
/*
* 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. */
* are plugged in, they're all getting read within one second.
*/
#define MAX_RETRIES 10
#define RETRY_DELAY (3 * HZ)
......@@ -604,9 +621,11 @@ static void fw_device_init(struct work_struct *work)
container_of(work, struct fw_device, work.work);
int minor, err;
/* All failure paths here set node->data to NULL, so that we
/*
* 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. */
* device.
*/
if (read_bus_info_block(device) < 0) {
if (device->config_rom_retries < MAX_RETRIES) {
......@@ -647,13 +666,15 @@ static void fw_device_init(struct work_struct *work)
create_units(device);
/* Transition the device to running state. If it got pulled
/*
* 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(). */
* fw_node_event().
*/
if (atomic_cmpxchg(&device->state,
FW_DEVICE_INITIALIZING,
FW_DEVICE_RUNNING) == FW_DEVICE_SHUTDOWN)
......@@ -662,10 +683,12 @@ static void fw_device_init(struct work_struct *work)
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
/*
* 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. */
* pretty harmless.
*/
if (device->node == device->card->root_node)
schedule_delayed_work(&device->card->work, 0);
......@@ -716,12 +739,14 @@ void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
if (device == NULL)
break;
/* Do minimal intialization of the device here, the
/*
* 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. */
* doesn't freak out.
*/
device_initialize(&device->device);
atomic_set(&device->state, FW_DEVICE_INITIALIZING);
device->card = fw_card_get(card);
......@@ -730,15 +755,19 @@ void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
device->generation = card->generation;
INIT_LIST_HEAD(&device->client_list);
/* Set the node data to point back to this device so
/*
* 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. */
* and generation for the device.
*/
node->data = device;
/* Many devices are slow to respond after bus resets,
/*
* 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. */
* 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;
......@@ -761,7 +790,8 @@ void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
if (!node->data)
break;
/* Destroy the device associated with the node. There
/*
* 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
......@@ -770,7 +800,8 @@ void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
* 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. */
* to create the device.
*/
device = node->data;
if (atomic_xchg(&device->state,
FW_DEVICE_SHUTDOWN) == FW_DEVICE_RUNNING) {
......
drivers/firewire/fw-device.h
浏览文件 @ c781c06d
/* -*- c-basic-offset: 8 -*-
*
* fw-device.h - 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
......
drivers/firewire/fw-iso.c
浏览文件 @ c781c06d
/* -*- c-basic-offset: 8 -*-
/*
* Isochronous IO functionality
*
* fw-iso.c - Isochronous IO
* Copyright (C) 2006 Kristian Hoegsberg <krh@bitplanet.net>
*
* This program is free software; you can redistribute it and/or modify
......
drivers/firewire/fw-ohci.c
浏览文件 @ c781c06d
/* -*- c-basic-offset: 8 -*-
/*
* Driver for OHCI 1394 controllers
*
* fw-ohci.c - Driver for OHCI 1394 boards
* Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net>
*
* This program is free software; you can redistribute it and/or modify
......@@ -141,8 +141,10 @@ struct fw_ohci {
int request_generation;
u32 bus_seconds;
/* Spinlock for accessing fw_ohci data. Never call out of
* this driver with this lock held. */
/*
* Spinlock for accessing fw_ohci data. Never call out of
* this driver with this lock held.
*/
spinlock_t lock;
u32 self_id_buffer[512];
......@@ -328,13 +330,15 @@ static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
p.timestamp = status & 0xffff;
p.generation = ohci->request_generation;
/* The OHCI bus reset handler synthesizes a phy packet with
/*
* The OHCI bus reset handler synthesizes a phy packet with
* the new generation number when a bus reset happens (see
* section 8.4.2.3). This helps us determine when a request
* was received and make sure we send the response in the same
* generation. We only need this for requests; for responses
* we use the unique tlabel for finding the matching
* request. */
* request.
*/
if (p.ack + 16 == 0x09)
ohci->request_generation = (buffer[2] >> 16) & 0xff;
......@@ -360,9 +364,11 @@ static void ar_context_tasklet(unsigned long data)
if (d->res_count == 0) {
size_t size, rest, offset;
/* This descriptor is finished and we may have a
/*
* This descriptor is finished and we may have a
* packet split across this and the next buffer. We
* reuse the page for reassembling the split packet. */
* reuse the page for reassembling the split packet.
*/
offset = offsetof(struct ar_buffer, data);
dma_unmap_single(ohci->card.device,
......@@ -473,11 +479,13 @@ context_init(struct context *ctx, struct fw_ohci *ohci,
ctx->tail_descriptor = ctx->buffer;
ctx->tail_descriptor_last = ctx->buffer;
/* We put a dummy descriptor in the buffer that has a NULL
/*
* We put a dummy descriptor in the buffer that has a NULL
* branch address and looks like it's been sent. That way we
* have a descriptor to append DMA programs to. Also, the
* ring buffer invariant is that it always has at least one
* element so that head == tail means buffer full. */
* element so that head == tail means buffer full.
*/
memset(ctx->head_descriptor, 0, sizeof *ctx->head_descriptor);
ctx->head_descriptor->control = cpu_to_le16(descriptor_output_last);
......@@ -575,9 +583,11 @@ struct driver_data {
struct fw_packet *packet;
};
/* This function apppends a packet to the DMA queue for transmission.
/*
* This function apppends a packet to the DMA queue for transmission.
* Must always be called with the ochi->lock held to ensure proper
* generation handling and locking around packet queue manipulation. */
* generation handling and locking around packet queue manipulation.
*/
static int
at_context_queue_packet(struct context *ctx, struct fw_packet *packet)
{
......@@ -598,10 +608,12 @@ at_context_queue_packet(struct context *ctx, struct fw_packet *packet)
d[0].control = cpu_to_le16(descriptor_key_immediate);
d[0].res_count = cpu_to_le16(packet->timestamp);
/* The DMA format for asyncronous link packets is different
/*
* The DMA format for asyncronous link packets is different
* from the IEEE1394 layout, so shift the fields around
* accordingly. If header_length is 8, it's a PHY packet, to
* which we need to prepend an extra quadlet. */
* which we need to prepend an extra quadlet.
*/
header = (__le32 *) &d[1];
if (packet->header_length > 8) {
......@@ -703,14 +715,18 @@ static int handle_at_packet(struct context *context,
break;
case OHCI1394_evt_flushed:
/* The packet was flushed should give same error as
* when we try to use a stale generation count. */
/*
* The packet was flushed should give same error as
* when we try to use a stale generation count.
*/
packet->ack = RCODE_GENERATION;
break;
case OHCI1394_evt_missing_ack:
/* Using a valid (current) generation count, but the
* node is not on the bus or not sending acks. */
/*
* Using a valid (current) generation count, but the
* node is not on the bus or not sending acks.
*/
packet->ack = RCODE_NO_ACK;
break;
......@@ -887,10 +903,12 @@ static void bus_reset_tasklet(unsigned long data)
}
ohci->node_id = reg & 0xffff;
/* The count in the SelfIDCount register is the number of
/*
* The count in the SelfIDCount register is the number of
* bytes in the self ID receive buffer. Since we also receive
* the inverted quadlets and a header quadlet, we shift one
* bit extra to get the actual number of self IDs. */
* bit extra to get the actual number of self IDs.
*/
self_id_count = (reg_read(ohci, OHCI1394_SelfIDCount) >> 3) & 0x3ff;
generation = (le32_to_cpu(ohci->self_id_cpu[0]) >> 16) & 0xff;
......@@ -901,7 +919,8 @@ static void bus_reset_tasklet(unsigned long data)
ohci->self_id_buffer[j] = le32_to_cpu(ohci->self_id_cpu[i]);
}
/* Check the consistency of the self IDs we just read. The
/*
* Check the consistency of the self IDs we just read. The
* problem we face is that a new bus reset can start while we
* read out the self IDs from the DMA buffer. If this happens,
* the DMA buffer will be overwritten with new self IDs and we
......@@ -911,7 +930,8 @@ static void bus_reset_tasklet(unsigned long data)
* self IDs in the buffer before reading them out and compare
* it to the current generation after reading them out. If
* the two generations match we know we have a consistent set
* of self IDs. */
* of self IDs.
*/
new_generation = (reg_read(ohci, OHCI1394_SelfIDCount) >> 16) & 0xff;
if (new_generation != generation) {
......@@ -928,12 +948,14 @@ static void bus_reset_tasklet(unsigned long data)
context_stop(&ohci->at_response_ctx);
reg_write(ohci, OHCI1394_IntEventClear, OHCI1394_busReset);
/* This next bit is unrelated to the AT context stuff but we
/*
* This next bit is unrelated to the AT context stuff but we
* have to do it under the spinlock also. If a new config rom
* was set up before this reset, the old one is now no longer
* in use and we can free it. Update the config rom pointers
* to point to the current config rom and clear the
* next_config_rom pointer so a new udpate can take place. */
* next_config_rom pointer so a new udpate can take place.
*/
if (ohci->next_config_rom != NULL) {
dma_free_coherent(ohci->card.device, CONFIG_ROM_SIZE,
......@@ -942,10 +964,12 @@ static void bus_reset_tasklet(unsigned long data)
ohci->config_rom_bus = ohci->next_config_rom_bus;
ohci->next_config_rom = NULL;
/* Restore config_rom image and manually update
/*
* Restore config_rom image and manually update
* config_rom registers. Writing the header quadlet
* will indicate that the config rom is ready, so we
* do that last. */
* do that last.
*/
reg_write(ohci, OHCI1394_BusOptions,
be32_to_cpu(ohci->config_rom[2]));
ohci->config_rom[0] = cpu_to_be32(ohci->next_header);
......@@ -1018,7 +1042,8 @@ static int ohci_enable(struct fw_card *card, u32 *config_rom, size_t length)
struct fw_ohci *ohci = fw_ohci(card);
struct pci_dev *dev = to_pci_dev(card->device);
/* When the link is not yet enabled, the atomic config rom
/*
* When the link is not yet enabled, the atomic config rom
* update mechanism described below in ohci_set_config_rom()
* is not active. We have to update ConfigRomHeader and
* BusOptions manually, and the write to ConfigROMmap takes
......@@ -1067,8 +1092,10 @@ static int ohci_enable(struct fw_card *card, u32 *config_rom, size_t length)
OHCI1394_HCControl_BIBimageValid);
flush_writes(ohci);
/* We are ready to go, initiate bus reset to finish the
* initialization. */
/*
* We are ready to go, initiate bus reset to finish the
* initialization.
*/
fw_core_initiate_bus_reset(&ohci->card, 1);
......@@ -1086,7 +1113,8 @@ ohci_set_config_rom(struct fw_card *card, u32 *config_rom, size_t length)
ohci = fw_ohci(card);
/* When the OHCI controller is enabled, the config rom update
/*
* When the OHCI controller is enabled, the config rom update
* mechanism is a bit tricky, but easy enough to use. See
* section 5.5.6 in the OHCI specification.
*
......@@ -1141,11 +1169,13 @@ ohci_set_config_rom(struct fw_card *card, u32 *config_rom, size_t length)
spin_unlock_irqrestore(&ohci->lock, flags);
/* Now initiate a bus reset to have the changes take
/*
* Now initiate a bus reset to have the changes take
* effect. We clean up the old config rom memory and DMA
* mappings in the bus reset tasklet, since the OHCI
* controller could need to access it before the bus reset
* takes effect. */
* takes effect.
*/
if (retval == 0)
fw_core_initiate_bus_reset(&ohci->card, 1);
......@@ -1196,8 +1226,10 @@ ohci_enable_phys_dma(struct fw_card *card, int node_id, int generation)
unsigned long flags;
int n, retval = 0;
/* FIXME: Make sure this bitmask is cleared when we clear the busReset
* interrupt bit. Clear physReqResourceAllBuses on bus reset. */
/*
* FIXME: Make sure this bitmask is cleared when we clear the busReset
* interrupt bit. Clear physReqResourceAllBuses on bus reset.
*/
spin_lock_irqsave(&ohci->lock, flags);
......@@ -1206,8 +1238,10 @@ ohci_enable_phys_dma(struct fw_card *card, int node_id, int generation)
goto out;
}
/* NOTE, if the node ID contains a non-local bus ID, physical DMA is
* enabled for _all_ nodes on remote buses. */
/*
* Note, if the node ID contains a non-local bus ID, physical DMA is
* enabled for _all_ nodes on remote buses.
*/
n = (node_id & 0xffc0) == LOCAL_BUS ? node_id & 0x3f : 63;
if (n < 32)
......@@ -1257,11 +1291,13 @@ static int handle_ir_dualbuffer_packet(struct context *context,
p = db + 1;
end = p + header_length;
while (p < end && i + ctx->base.header_size <= PAGE_SIZE) {
/* The iso header is byteswapped to little endian by
/*
* The iso header is byteswapped to little endian by
* the controller, but the remaining header quadlets
* are big endian. We want to present all the headers
* as big endian, so we have to swap the first
* quadlet. */
* quadlet.
*/
*(u32 *) (ctx->header + i) = __swab32(*(u32 *) (p + 4));
memcpy(ctx->header + i + 4, p + 8, ctx->base.header_size - 4);
i += ctx->base.header_size;
......@@ -1457,8 +1493,10 @@ ohci_queue_iso_transmit(struct fw_iso_context *base,
u32 payload_index, payload_end_index, next_page_index;
int page, end_page, i, length, offset;
/* FIXME: Cycle lost behavior should be configurable: lose
* packet, retransmit or terminate.. */
/*
* FIXME: Cycle lost behavior should be configurable: lose
* packet, retransmit or terminate..
*/
p = packet;
payload_index = payload;
......@@ -1553,8 +1591,10 @@ ohci_queue_iso_receive_dualbuffer(struct fw_iso_context *base,
u32 z, header_z, length, rest;
int page, offset, packet_count, header_size;
/* FIXME: Cycle lost behavior should be configurable: lose
* packet, retransmit or terminate.. */
/*
* FIXME: Cycle lost behavior should be configurable: lose
* packet, retransmit or terminate..
*/
if (packet->skip) {
d = context_get_descriptors(&ctx->context, 2, &d_bus);
......@@ -1572,8 +1612,10 @@ ohci_queue_iso_receive_dualbuffer(struct fw_iso_context *base,
p = packet;
z = 2;
/* The OHCI controller puts the status word in the header
* buffer too, so we need 4 extra bytes per packet. */
/*
* The OHCI controller puts the status word in the header
* buffer too, so we need 4 extra bytes per packet.
*/
packet_count = p->header_length / ctx->base.header_size;
header_size = packet_count * (ctx->base.header_size + 4);
......@@ -1673,8 +1715,6 @@ static int software_reset(struct fw_ohci *ohci)
return -EBUSY;
}
/* ---------- pci subsystem interface ---------- */
enum {
CLEANUP_SELF_ID,
CLEANUP_REGISTERS,
......@@ -1753,11 +1793,13 @@ pci_probe(struct pci_dev *dev, const struct pci_device_id *ent)
return cleanup(ohci, CLEANUP_REGISTERS, -EBUSY);
}
/* Now enable LPS, which we need in order to start accessing
/*
* Now enable LPS, which we need in order to start accessing
* most of the registers. In fact, on some cards (ALI M5251),
* accessing registers in the SClk domain without LPS enabled
* will lock up the machine. Wait 50msec to make sure we have
* full link enabled. */
* full link enabled.
*/
reg_write(ohci, OHCI1394_HCControlSet,
OHCI1394_HCControl_LPS |
OHCI1394_HCControl_postedWriteEnable);
......@@ -1854,8 +1896,10 @@ static void pci_remove(struct pci_dev *dev)
flush_writes(ohci);
fw_core_remove_card(&ohci->card);
/* FIXME: Fail all pending packets here, now that the upper
* layers can't queue any more. */
/*
* FIXME: Fail all pending packets here, now that the upper
* layers can't queue any more.
*/
software_reset(ohci);
free_irq(dev->irq, ohci);
......
drivers/firewire/fw-sbp2.c
浏览文件 @ c781c06d
/* -*- c-basic-offset: 8 -*-
* fw-spb2.c -- SBP2 driver (SCSI over IEEE1394)
/*
* SBP2 driver (SCSI over IEEE1394)
*
* Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net>
*
......@@ -18,7 +18,8 @@
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* The basic structure of this driver is based the old storage driver,
/*
* The basic structure of this driver is based on the old storage driver,
* drivers/ieee1394/sbp2.c, originally written by
* James Goodwin <jamesg@filanet.com>
* with later contributions and ongoing maintenance from
......@@ -60,11 +61,13 @@ struct sbp2_device {
u32 workarounds;
int login_id;
/* We cache these addresses and only update them once we've
/*
* We cache these addresses and only update them once we've
* logged in or reconnected to the sbp2 device. That way, any
* IO to the device will automatically fail and get retried if
* it happens in a window where the device is not ready to
* handle it (e.g. after a bus reset but before we reconnect). */
* handle it (e.g. after a bus reset but before we reconnect).
*/
int node_id;
int address_high;
int generation;
......@@ -239,10 +242,14 @@ static const struct {
.model = ~0,
.workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
},
/* There are iPods (2nd gen, 3rd gen) with model_id == 0, but
/*
* There are iPods (2nd gen, 3rd gen) with model_id == 0, but
* these iPods do not feature the read_capacity bug according
* to one report. Read_capacity behaviour as well as model_id
* could change due to Apple-supplied firmware updates though. */
* could change due to Apple-supplied firmware updates though.
*/
/* iPod 4th generation. */ {
.firmware_revision = 0x0a2700,
.model = 0x000021,
......@@ -398,9 +405,10 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation,
if (orb == NULL)
return -ENOMEM;
/* The sbp2 device is going to send a block read request to
* read out the request from host memory, so map it for
* dma. */
/*
* The sbp2 device is going to send a block read request to
* read out the request from host memory, so map it for dma.
*/
orb->base.request_bus =
dma_map_single(device->card->device, &orb->request,
sizeof orb->request, DMA_TO_DEVICE);
......@@ -426,10 +434,11 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation,
orb->request.status_fifo.high = sd->address_handler.offset >> 32;
orb->request.status_fifo.low = sd->address_handler.offset;
/* FIXME: Yeah, ok this isn't elegant, we hardwire exclusive
/*
* FIXME: Yeah, ok this isn't elegant, we hardwire exclusive
* login and 1 second reconnect time. The reconnect setting
* is probably fine, but the exclusive login should be an
* option. */
* is probably fine, but the exclusive login should be an option.
*/
if (function == SBP2_LOGIN_REQUEST) {
orb->request.misc |=
management_orb_exclusive |
......@@ -592,8 +601,10 @@ static void sbp2_login(struct work_struct *work)
sbp2_send_management_orb(unit, sd->node_id, sd->generation,
SBP2_LOGOUT_REQUEST, sd->login_id,
NULL);
/* Set this back to sbp2_login so we fall back and
* retry login on bus reset. */
/*
* Set this back to sbp2_login so we fall back and
* retry login on bus reset.
*/
PREPARE_DELAYED_WORK(&sd->work, sbp2_login);
}
kref_put(&sd->kref, release_sbp2_device);
......@@ -633,9 +644,11 @@ static int sbp2_probe(struct device *dev)
return -EBUSY;
}
/* Scan unit directory to get management agent address,
/*
* Scan unit directory to get management agent address,
* firmware revison and model. Initialize firmware_revision
* and model to values that wont match anything in our table. */
* and model to values that wont match anything in our table.
*/
firmware_revision = 0xff000000;
model = 0xff000000;
fw_csr_iterator_init(&ci, unit->directory);
......@@ -673,9 +686,11 @@ static int sbp2_probe(struct device *dev)
get_device(&unit->device);
/* We schedule work to do the login so we can easily
/*
* We schedule work to do the login so we can easily
* reschedule retries. Always get the ref before scheduling
* work.*/
* work.
*/
INIT_DELAYED_WORK(&sd->work, sbp2_login);
if (schedule_delayed_work(&sd->work, 0))
kref_get(&sd->kref);
......@@ -834,9 +849,11 @@ complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status)
result = sbp2_status_to_sense_data(status_get_data(*status),
orb->cmd->sense_buffer);
} else {
/* If the orb completes with status == NULL, something
/*
* If the orb completes with status == NULL, something
* went wrong, typically a bus reset happened mid-orb
* or when sending the write (less likely). */
* or when sending the write (less likely).
*/
result = DID_BUS_BUSY << 16;
}
......@@ -878,11 +895,13 @@ static void sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb)
count = dma_map_sg(device->card->device, sg, orb->cmd->use_sg,
orb->cmd->sc_data_direction);
/* Handle the special case where there is only one element in
/*
* Handle the special case where there is only one element in
* the scatter list by converting it to an immediate block
* request. This is also a workaround for broken devices such
* as the second generation iPod which doesn't support page
* tables. */
* tables.
*/
if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) {
orb->request.data_descriptor.high = sd->address_high;
orb->request.data_descriptor.low = sg_dma_address(sg);
......@@ -891,8 +910,10 @@ static void sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb)
return;
}
/* Convert the scatterlist to an sbp2 page table. If any
* scatterlist entries are too big for sbp2 we split the as we go. */
/*
* Convert the scatterlist to an sbp2 page table. If any
* scatterlist entries are too big for sbp2 we split the as we go.
*/
for (i = 0, j = 0; i < count; i++) {
sg_len = sg_dma_len(sg + i);
sg_addr = sg_dma_address(sg + i);
......@@ -908,11 +929,13 @@ static void sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb)
size = sizeof orb->page_table[0] * j;
/* The data_descriptor pointer is the one case where we need
/*
* The data_descriptor pointer is the one case where we need
* to fill in the node ID part of the address. All other
* pointers assume that the data referenced reside on the
* initiator (i.e. us), but data_descriptor can refer to data
* on other nodes so we need to put our ID in descriptor.high. */
* on other nodes so we need to put our ID in descriptor.high.
*/
orb->page_table_bus =
dma_map_single(device->card->device, orb->page_table,
......@@ -933,8 +956,10 @@ static void sbp2_command_orb_map_buffer(struct sbp2_command_orb *orb)
struct fw_device *device = fw_device(unit->device.parent);
struct sbp2_device *sd = unit->device.driver_data;
/* As for map_scatterlist, we need to fill in the high bits of
* the data_descriptor pointer. */
/*
* As for map_scatterlist, we need to fill in the high bits of
* the data_descriptor pointer.
*/
orb->request_buffer_bus =
dma_map_single(device->card->device,
......@@ -956,8 +981,10 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
struct sbp2_device *sd = unit->device.driver_data;
struct sbp2_command_orb *orb;
/* Bidirectional commands are not yet implemented, and unknown
* transfer direction not handled. */
/*
* Bidirectional commands are not yet implemented, and unknown
* transfer direction not handled.
*/
if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) {
fw_error("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
goto fail_alloc;
......@@ -983,10 +1010,12 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
orb->request.next.high = SBP2_ORB_NULL;
orb->request.next.low = 0x0;
/* At speed 100 we can do 512 bytes per packet, at speed 200,
/*
* At speed 100 we can do 512 bytes per packet, at speed 200,
* 1024 bytes per packet etc. The SBP-2 max_payload field
* specifies the max payload size as 2 ^ (max_payload + 2), so
* if we set this to max_speed + 7, we get the right value. */
* if we set this to max_speed + 7, we get the right value.
*/
orb->request.misc =
command_orb_max_payload(device->node->max_speed + 7) |
command_orb_speed(device->node->max_speed) |
......@@ -1002,9 +1031,11 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done)
if (cmd->use_sg) {
sbp2_command_orb_map_scatterlist(orb);
} else if (cmd->request_bufflen > SBP2_MAX_SG_ELEMENT_LENGTH) {
/* FIXME: Need to split this into a sg list... but
/*
* FIXME: Need to split this into a sg list... but
* could we get the scsi or blk layer to do that by
* reporting our max supported block size? */
* reporting our max supported block size?
*/
fw_error("command > 64k\n");
goto fail_bufflen;
} else if (cmd->request_bufflen > 0) {
......
drivers/firewire/fw-topology.c
浏览文件 @ c781c06d
/* -*- c-basic-offset: 8 -*-
*
* fw-topology.c - Incremental bus scan, based on bus topology
/*
* Incremental bus scan, based on bus topology
*
* Copyright (C) 2004-2006 Kristian Hoegsberg <krh@bitplanet.net>
*
......@@ -69,10 +68,12 @@ static u32 *count_ports(u32 *sid, int *total_port_count, int *child_port_count)
sid++;
q = *sid;
/* Check that the extra packets actually are
/*
* 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. */
* packets increase as expected.
*/
if (!self_id_extended(q) ||
seq != self_id_ext_sequence(q))
......@@ -113,7 +114,8 @@ static struct fw_node *fw_node_create(u32 sid, int port_count, int color)
return node;
}
/* Compute the maximum hop count for this node and it's children. The
/*
* 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
......@@ -202,8 +204,10 @@ static struct fw_node *build_tree(struct fw_card *card,
return NULL;
}
/* Seek back from the top of our stack to find the
* start of the child nodes for this node. */
/*
* 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);
......@@ -230,7 +234,8 @@ static struct fw_node *build_tree(struct fw_card *card,
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
/*
* 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
......@@ -245,8 +250,10 @@ static struct fw_node *build_tree(struct fw_card *card,
case SELFID_PORT_CHILD:
node->ports[i].node = child;
/* Fix up parent reference for this
* child node. */
/*
* Fix up parent reference for this
* child node.
*/
child->ports[child->color].node = node;
child->color = card->color;
child = fw_node(child->link.next);
......@@ -254,9 +261,11 @@ static struct fw_node *build_tree(struct fw_card *card,
}
}
/* Check that the node reports exactly one parent
/*
* Check that the node reports exactly one parent
* port, except for the root, which of course should
* have no parents. */
* have no parents.
*/
if ((next_sid == end && parent_count != 0) ||
(next_sid < end && parent_count != 1)) {
fw_error("Parent port inconsistency for node %d: "
......@@ -269,9 +278,11 @@ static struct fw_node *build_tree(struct fw_card *card,
list_add_tail(&node->link, &stack);
stack_depth += 1 - child_port_count;
/* If all PHYs does not report the same gap 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. */
* count reconfiguration and a reset.
*/
if (self_id_gap_count(q) != gap_count)
gap_count = 63;
......@@ -427,9 +438,11 @@ update_tree(struct fw_card *card, struct fw_node *root)
for (i = 0; i < node0->port_count; i++) {
if (node0->ports[i].node && node1->ports[i].node) {
/* This port didn't change, queue the
/*
* This port didn't change, queue the
* connected node for further
* investigation. */
* investigation.
*/
if (node0->ports[i].node->color == card->color)
continue;
list_add_tail(&node0->ports[i].node->link,
......@@ -437,19 +450,23 @@ update_tree(struct fw_card *card, struct fw_node *root)
list_add_tail(&node1->ports[i].node->link,
&list1);
} else if (node0->ports[i].node) {
/* The nodes connected here were
/*
* The nodes connected here were
* unplugged; unref the lost nodes and
* queue FW_NODE_LOST callbacks for
* them. */
* 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
/*
* One or more node were connected to
* this port. Move the new nodes into
* the tree and queue FW_NODE_CREATED
* callbacks for them. */
* callbacks for them.
*/
move_tree(node0, node1, i);
for_each_fw_node(card, node0->ports[i].node,
report_found_node);
......@@ -486,9 +503,11 @@ fw_core_handle_bus_reset(struct fw_card *card,
spin_lock_irqsave(&card->lock, flags);
/* If the new topology has a different self_id_count the topology
/*
* 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. */
* reset the IRM reset counter.
*/
if (card->self_id_count != self_id_count)
card->bm_retries = 0;
......
drivers/firewire/fw-topology.h
浏览文件 @ c781c06d
/* -*- c-basic-offset: 8 -*-
*
* fw-topology.h -- Incremental bus scan, based on bus topology
*
/*
* Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net>
*
* This program is free software; you can redistribute it and/or modify
......
drivers/firewire/fw-transaction.c
浏览文件 @ c781c06d
/* -*- c-basic-offset: 8 -*-
*
* fw-transaction.c - core IEEE1394 transaction logic
/*
* Core IEEE1394 transaction logic
*
* Copyright (C) 2004-2006 Kristian Hoegsberg <krh@bitplanet.net>
*
......@@ -85,21 +84,27 @@ close_transaction(struct fw_transaction *transaction,
return -ENOENT;
}
/* Only valid for transactions that are potentially pending (ie have
* been sent). */
/*
* 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
/*
* Cancel the packet transmission if it's still queued. That
* will call the packet transmission callback which cancels
* the transaction. */
* 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. */
/*
* 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);
}
......@@ -131,8 +136,10 @@ transmit_complete_callback(struct fw_packet *packet,
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. */
/*
* 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;
}
......@@ -243,13 +250,17 @@ fw_send_request(struct fw_card *card, struct fw_transaction *t,
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. */
/*
* 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. */
/*
* Allocate tlabel from the bitmap and put the transaction on
* the list while holding the card spinlock.
*/
spin_lock_irqsave(&card->lock, flags);
......@@ -336,9 +347,11 @@ void fw_flush_transactions(struct fw_card *card)
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
/*
* 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.*/
* transactions out of the list. So do it here.
*/
t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data);
}
}
......@@ -587,9 +600,11 @@ allocate_request(struct fw_packet *p)
void
fw_send_response(struct fw_card *card, struct fw_request *request, int rcode)
{
/* Broadcast packets are reported as ACK_COMPLETE, so this
/*
* 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. */
* broadcast packets or posted writes.
*/
if (request->ack != ACK_PENDING)
return;
......@@ -639,11 +654,13 @@ fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
offset, request->length);
spin_unlock_irqrestore(&address_handler_lock, flags);
/* FIXME: lookup the fw_node corresponding to the sender of
/*
* 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. */
* upper layers registered it for this node.
*/
if (handler == NULL)
fw_send_response(card, request, RCODE_ADDRESS_ERROR);
......@@ -687,8 +704,10 @@ fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
return;
}
/* FIXME: sanity check packet, is length correct, does tcodes
* and addresses match. */
/*
* FIXME: sanity check packet, is length correct, does tcodes
* and addresses match.
*/
switch (tcode) {
case TCODE_READ_QUADLET_RESPONSE:
......@@ -790,11 +809,13 @@ handle_registers(struct fw_card *card, struct fw_request *request,
case CSR_BANDWIDTH_AVAILABLE:
case CSR_CHANNELS_AVAILABLE_HI:
case CSR_CHANNELS_AVAILABLE_LO:
/* FIXME: these are handled by the OHCI hardware and
/*
* 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. */
* transactions.
*/
BUG();
break;
......
drivers/firewire/fw-transaction.h
浏览文件 @ c781c06d
/* -*- c-basic-offset: 8 -*-
*
* fw-transaction.h - Header for IEEE1394 transaction logic
*
/*
* Copyright (C) 2003-2006 Kristian Hoegsberg <krh@bitplanet.net>
*
* This program is free software; you can redistribute it and/or modify
......@@ -209,7 +206,8 @@ struct fw_packet {
size_t payload_length;
u32 timestamp;
/* This callback is called when the packet transmission has
/*
* 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.
......@@ -230,8 +228,10 @@ struct fw_transaction {
struct fw_packet packet;
/* The data passed to the callback is valid only during the
* callback. */
/*
* The data passed to the callback is valid only during the
* callback.
*/
fw_transaction_callback_t callback;
void *callback_data;
};
......@@ -291,8 +291,10 @@ struct fw_card {
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. */
/*
* 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];
......@@ -318,12 +320,14 @@ struct fw_card {
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
/*
* 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). */
* scatter-gather streaming (e.g. assembling video frame automatically).
*/
struct fw_iso_packet {
u16 payload_length; /* Length of indirect payload. */
......@@ -352,11 +356,13 @@ typedef void (*fw_iso_callback_t) (struct fw_iso_context *context,
void *header,
void *data);
/* An iso buffer is just a set of pages mapped for DMA in the
/*
* 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. */
* fw_iso_buffer_map() will map the pages into a given vma.
*/
struct fw_iso_buffer {
enum dma_data_direction direction;
......@@ -408,18 +414,22 @@ 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.
/*
* 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. */
* 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
/*
* 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. */
* an initiate a bus reset.
*/
int (*set_config_rom) (struct fw_card *card,
u32 *config_rom, size_t length);
......@@ -428,12 +438,14 @@ struct fw_card_driver {
/* 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
/*
* 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. */
* match.
*/
int (*enable_phys_dma) (struct fw_card *card,
int node_id, int generation);
......@@ -473,15 +485,15 @@ 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 */
/*
* Called by the topology code to inform the device code of node
* activity; found, lost, or updated nodes.
*/
void
fw_node_event(struct fw_card *card, struct fw_node *node, int event);
/* API used by card level drivers */
/* Do we need phy speed here also? If we add more args, maybe we
should go back to struct fw_card_info. */
void
fw_card_initialize(struct fw_card *card, const struct fw_card_driver *driver,
struct device *device);
......
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