#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
-#include <linux/timer.h>
#include <linux/workqueue.h>
#include <asm/atomic.h>
#include "core.h"
-int fw_compute_block_crc(u32 *block)
+int fw_compute_block_crc(__be32 *block)
{
- __be32 be32_block[256];
- int i, length;
+ int length;
+ u16 crc;
- 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);
+ length = (be32_to_cpu(block[0]) >> 16) & 0xff;
+ crc = crc_itu_t(0, (u8 *)&block[1], length * 4);
+ *block |= cpu_to_be32(crc);
return length;
}
static LIST_HEAD(descriptor_list);
static int descriptor_count;
+static __be32 tmp_config_rom[256];
+/* ROM header, bus info block, root dir header, capabilities = 7 quadlets */
+static size_t config_rom_length = 1 + 4 + 1 + 1;
+
#define BIB_CRC(v) ((v) << 0)
#define BIB_CRC_LENGTH(v) ((v) << 16)
#define BIB_INFO_LENGTH(v) ((v) << 24)
-
+#define BIB_BUS_NAME 0x31333934 /* "1394" */
#define BIB_LINK_SPEED(v) ((v) << 0)
#define BIB_GENERATION(v) ((v) << 4)
#define BIB_MAX_ROM(v) ((v) << 8)
#define BIB_BMC ((1) << 28)
#define BIB_ISC ((1) << 29)
#define BIB_CMC ((1) << 30)
-#define BIB_IMC ((1) << 31)
+#define BIB_IRMC ((1) << 31)
+#define NODE_CAPABILITIES 0x0c0083c0 /* per IEEE 1394 clause 8.3.2.6.5.2 */
-static u32 *generate_config_rom(struct fw_card *card, size_t *config_rom_length)
+static void generate_config_rom(struct fw_card *card, __be32 *config_rom)
{
struct fw_descriptor *desc;
- static u32 config_rom[256];
- int i, j, length;
+ int i, j, k, length;
/*
* Initialize contents of config rom buffer. On the OHCI
* 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] =
+ config_rom[0] = cpu_to_be32(
+ BIB_CRC_LENGTH(4) | BIB_INFO_LENGTH(4) | BIB_CRC(0));
+ config_rom[1] = cpu_to_be32(BIB_BUS_NAME);
+ config_rom[2] = cpu_to_be32(
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;
+ BIB_BMC | BIB_ISC | BIB_CMC | BIB_IRMC);
+ config_rom[3] = cpu_to_be32(card->guid >> 32);
+ config_rom[4] = cpu_to_be32(card->guid);
/* Generate root directory. */
- i = 5;
- config_rom[i++] = 0;
- config_rom[i++] = 0x0c0083c0; /* node capabilities */
- j = i + descriptor_count;
+ config_rom[6] = cpu_to_be32(NODE_CAPABILITIES);
+ i = 7;
+ j = 7 + 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);
+ config_rom[i++] = cpu_to_be32(desc->immediate);
+ config_rom[i] = cpu_to_be32(desc->key | (j - i));
i++;
j += desc->length;
}
/* Update root directory length. */
- config_rom[5] = (i - 5 - 1) << 16;
+ config_rom[5] = cpu_to_be32((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);
+ for (k = 0; k < desc->length; k++)
+ config_rom[i + k] = cpu_to_be32(desc->data[k]);
i += desc->length;
}
for (i = 0; i < j; i += length + 1)
length = fw_compute_block_crc(config_rom + i);
- *config_rom_length = j;
-
- return config_rom;
+ WARN_ON(j != config_rom_length);
}
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);
+ generate_config_rom(card, tmp_config_rom);
+ card->driver->set_config_rom(card, tmp_config_rom,
+ config_rom_length);
}
}
+static size_t required_space(struct fw_descriptor *desc)
+{
+ /* descriptor + entry into root dir + optional immediate entry */
+ return desc->length + 1 + (desc->immediate > 0 ? 1 : 0);
+}
+
int fw_core_add_descriptor(struct fw_descriptor *desc)
{
size_t i;
+ int ret;
/*
* Check descriptor is valid; the length of all blocks in the
mutex_lock(&card_mutex);
- list_add_tail(&desc->link, &descriptor_list);
- descriptor_count++;
- if (desc->immediate > 0)
+ if (config_rom_length + required_space(desc) > 256) {
+ ret = -EBUSY;
+ } else {
+ list_add_tail(&desc->link, &descriptor_list);
+ config_rom_length += required_space(desc);
descriptor_count++;
- update_config_roms();
+ if (desc->immediate > 0)
+ descriptor_count++;
+ update_config_roms();
+ ret = 0;
+ }
mutex_unlock(&card_mutex);
- return 0;
+ return ret;
}
EXPORT_SYMBOL(fw_core_add_descriptor);
mutex_lock(&card_mutex);
list_del(&desc->link);
+ config_rom_length -= required_space(desc);
descriptor_count--;
if (desc->immediate > 0)
descriptor_count--;
{
int channel, bandwidth = 0;
- fw_iso_resource_manage(card, generation, 1ULL << 31,
- &channel, &bandwidth, true);
+ fw_iso_resource_manage(card, generation, 1ULL << 31, &channel,
+ &bandwidth, true, card->bm_transaction_data);
if (channel == 31) {
card->broadcast_channel_allocated = true;
device_for_each_child(card->device, (void *)(long)generation,
void fw_schedule_bm_work(struct fw_card *card, unsigned long delay)
{
- int scheduled;
-
fw_card_get(card);
- scheduled = schedule_delayed_work(&card->work, delay);
- if (!scheduled)
+ if (!schedule_delayed_work(&card->work, delay))
fw_card_put(card);
}
bool do_reset = false;
bool root_device_is_running;
bool root_device_is_cmc;
- __be32 lock_data[2];
spin_lock_irqsave(&card->lock, flags);
goto pick_me;
}
- lock_data[0] = cpu_to_be32(0x3f);
- lock_data[1] = cpu_to_be32(local_id);
+ card->bm_transaction_data[0] = cpu_to_be32(0x3f);
+ card->bm_transaction_data[1] = cpu_to_be32(local_id);
spin_unlock_irqrestore(&card->lock, flags);
rcode = fw_run_transaction(card, TCODE_LOCK_COMPARE_SWAP,
irm_id, generation, SCODE_100,
CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID,
- lock_data, sizeof(lock_data));
+ card->bm_transaction_data,
+ sizeof(card->bm_transaction_data));
if (rcode == RCODE_GENERATION)
/* Another bus reset, BM work has been rescheduled. */
goto out;
if (rcode == RCODE_COMPLETE &&
- lock_data[0] != cpu_to_be32(0x3f)) {
+ card->bm_transaction_data[0] != cpu_to_be32(0x3f)) {
/* Somebody else is BM. Only act as IRM. */
if (local_id == irm_id)
fw_card_put(card);
}
-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)
init_completion(&card->done);
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;
int fw_card_add(struct fw_card *card,
u32 max_receive, u32 link_speed, u64 guid)
{
- u32 *config_rom;
- size_t length;
int ret;
card->max_receive = max_receive;
card->guid = guid;
mutex_lock(&card_mutex);
- config_rom = generate_config_rom(card, &length);
- list_add_tail(&card->link, &card_list);
- mutex_unlock(&card_mutex);
- ret = card->driver->enable(card, config_rom, length);
- if (ret < 0) {
- mutex_lock(&card_mutex);
- list_del(&card->link);
- mutex_unlock(&card_mutex);
- }
+ generate_config_rom(card, tmp_config_rom);
+ ret = card->driver->enable(card, tmp_config_rom, config_rom_length);
+ if (ret == 0)
+ list_add_tail(&card->link, &card_list);
+
+ mutex_unlock(&card_mutex);
return ret;
}
* shutdown still need to be provided by the card driver.
*/
-static int dummy_enable(struct fw_card *card, u32 *config_rom, size_t length)
+static int dummy_enable(struct fw_card *card,
+ const __be32 *config_rom, size_t length)
{
BUG();
return -1;
}
static int dummy_set_config_rom(struct fw_card *card,
- u32 *config_rom, size_t length)
+ const __be32 *config_rom, size_t length)
{
/*
* We take the card out of card_list before setting the dummy
wait_for_completion(&card->done);
WARN_ON(!list_empty(&card->transaction_list));
- del_timer_sync(&card->flush_timer);
}
EXPORT_SYMBOL(fw_core_remove_card);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff