ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/marvell/linux/drivers/firewire/core-card.c b/marvell/linux/drivers/firewire/core-card.c
new file mode 100644
index 0000000..d446a72
--- /dev/null
+++ b/marvell/linux/drivers/firewire/core-card.c
@@ -0,0 +1,724 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net>
+ */
+
+#include <linux/bug.h>
+#include <linux/completion.h>
+#include <linux/crc-itu-t.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/firewire.h>
+#include <linux/firewire-constants.h>
+#include <linux/jiffies.h>
+#include <linux/kernel.h>
+#include <linux/kref.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/workqueue.h>
+
+#include <linux/atomic.h>
+#include <asm/byteorder.h>
+
+#include "core.h"
+
+#define define_fw_printk_level(func, kern_level) \
+void func(const struct fw_card *card, const char *fmt, ...) \
+{ \
+ struct va_format vaf; \
+ va_list args; \
+ \
+ va_start(args, fmt); \
+ vaf.fmt = fmt; \
+ vaf.va = &args; \
+ printk(kern_level KBUILD_MODNAME " %s: %pV", \
+ dev_name(card->device), &vaf); \
+ va_end(args); \
+}
+define_fw_printk_level(fw_err, KERN_ERR);
+define_fw_printk_level(fw_notice, KERN_NOTICE);
+
+int fw_compute_block_crc(__be32 *block)
+{
+ int length;
+ u16 crc;
+
+ 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 DEFINE_MUTEX(card_mutex);
+static LIST_HEAD(card_list);
+
+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_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_IRMC ((1) << 31)
+#define NODE_CAPABILITIES 0x0c0083c0 /* per IEEE 1394 clause 8.3.2.6.5.2 */
+
+/*
+ * IEEE-1394 specifies a default SPLIT_TIMEOUT value of 800 cycles (100 ms),
+ * but we have to make it longer because there are many devices whose firmware
+ * is just too slow for that.
+ */
+#define DEFAULT_SPLIT_TIMEOUT (2 * 8000)
+
+#define CANON_OUI 0x000085
+
+static void generate_config_rom(struct fw_card *card, __be32 *config_rom)
+{
+ struct fw_descriptor *desc;
+ int i, j, k, 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 matches
+ * the version stored in the OHCI registers.
+ */
+
+ 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_IRMC);
+ config_rom[3] = cpu_to_be32(card->guid >> 32);
+ config_rom[4] = cpu_to_be32(card->guid);
+
+ /* Generate root directory. */
+ 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++] = 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] = cpu_to_be32((i - 5 - 1) << 16);
+
+ /* End of root directory, now copy in descriptors. */
+ list_for_each_entry (desc, &descriptor_list, link) {
+ for (k = 0; k < desc->length; k++)
+ config_rom[i + k] = cpu_to_be32(desc->data[k]);
+ 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);
+
+ WARN_ON(j != config_rom_length);
+}
+
+static void update_config_roms(void)
+{
+ struct fw_card *card;
+
+ list_for_each_entry (card, &card_list, link) {
+ 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
+ * 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);
+
+ 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++;
+ if (desc->immediate > 0)
+ descriptor_count++;
+ update_config_roms();
+ ret = 0;
+ }
+
+ mutex_unlock(&card_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL(fw_core_add_descriptor);
+
+void fw_core_remove_descriptor(struct fw_descriptor *desc)
+{
+ mutex_lock(&card_mutex);
+
+ list_del(&desc->link);
+ config_rom_length -= required_space(desc);
+ descriptor_count--;
+ if (desc->immediate > 0)
+ descriptor_count--;
+ update_config_roms();
+
+ mutex_unlock(&card_mutex);
+}
+EXPORT_SYMBOL(fw_core_remove_descriptor);
+
+static int reset_bus(struct fw_card *card, bool 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);
+}
+
+void fw_schedule_bus_reset(struct fw_card *card, bool delayed, bool short_reset)
+{
+ /* We don't try hard to sort out requests of long vs. short resets. */
+ card->br_short = short_reset;
+
+ /* Use an arbitrary short delay to combine multiple reset requests. */
+ fw_card_get(card);
+ if (!queue_delayed_work(fw_workqueue, &card->br_work,
+ delayed ? DIV_ROUND_UP(HZ, 100) : 0))
+ fw_card_put(card);
+}
+EXPORT_SYMBOL(fw_schedule_bus_reset);
+
+static void br_work(struct work_struct *work)
+{
+ struct fw_card *card = container_of(work, struct fw_card, br_work.work);
+
+ /* Delay for 2s after last reset per IEEE 1394 clause 8.2.1. */
+ if (card->reset_jiffies != 0 &&
+ time_before64(get_jiffies_64(), card->reset_jiffies + 2 * HZ)) {
+ if (!queue_delayed_work(fw_workqueue, &card->br_work, 2 * HZ))
+ fw_card_put(card);
+ return;
+ }
+
+ fw_send_phy_config(card, FW_PHY_CONFIG_NO_NODE_ID, card->generation,
+ FW_PHY_CONFIG_CURRENT_GAP_COUNT);
+ reset_bus(card, card->br_short);
+ fw_card_put(card);
+}
+
+static void allocate_broadcast_channel(struct fw_card *card, int generation)
+{
+ int channel, bandwidth = 0;
+
+ if (!card->broadcast_channel_allocated) {
+ fw_iso_resource_manage(card, generation, 1ULL << 31,
+ &channel, &bandwidth, true);
+ if (channel != 31) {
+ fw_notice(card, "failed to allocate broadcast channel\n");
+ return;
+ }
+ card->broadcast_channel_allocated = true;
+ }
+
+ device_for_each_child(card->device, (void *)(long)generation,
+ fw_device_set_broadcast_channel);
+}
+
+static const char gap_count_table[] = {
+ 63, 5, 7, 8, 10, 13, 16, 18, 21, 24, 26, 29, 32, 35, 37, 40
+};
+
+void fw_schedule_bm_work(struct fw_card *card, unsigned long delay)
+{
+ fw_card_get(card);
+ if (!schedule_delayed_work(&card->bm_work, delay))
+ fw_card_put(card);
+}
+
+static void bm_work(struct work_struct *work)
+{
+ struct fw_card *card = container_of(work, struct fw_card, bm_work.work);
+ struct fw_device *root_device, *irm_device;
+ struct fw_node *root_node;
+ int root_id, new_root_id, irm_id, bm_id, local_id;
+ int gap_count, generation, grace, rcode;
+ bool do_reset = false;
+ bool root_device_is_running;
+ bool root_device_is_cmc;
+ bool irm_is_1394_1995_only;
+ bool keep_this_irm;
+ __be32 transaction_data[2];
+
+ spin_lock_irq(&card->lock);
+
+ if (card->local_node == NULL) {
+ spin_unlock_irq(&card->lock);
+ goto out_put_card;
+ }
+
+ generation = card->generation;
+
+ root_node = card->root_node;
+ fw_node_get(root_node);
+ root_device = root_node->data;
+ root_device_is_running = root_device &&
+ atomic_read(&root_device->state) == FW_DEVICE_RUNNING;
+ root_device_is_cmc = root_device && root_device->cmc;
+
+ irm_device = card->irm_node->data;
+ irm_is_1394_1995_only = irm_device && irm_device->config_rom &&
+ (irm_device->config_rom[2] & 0x000000f0) == 0;
+
+ /* Canon MV5i works unreliably if it is not root node. */
+ keep_this_irm = irm_device && irm_device->config_rom &&
+ irm_device->config_rom[3] >> 8 == CANON_OUI;
+
+ root_id = root_node->node_id;
+ irm_id = card->irm_node->node_id;
+ local_id = card->local_node->node_id;
+
+ grace = time_after64(get_jiffies_64(),
+ card->reset_jiffies + DIV_ROUND_UP(HZ, 8));
+
+ if ((is_next_generation(generation, card->bm_generation) &&
+ !card->bm_abdicate) ||
+ (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.
+ */
+
+ if (!card->irm_node->link_on) {
+ new_root_id = local_id;
+ fw_notice(card, "%s, making local node (%02x) root\n",
+ "IRM has link off", new_root_id);
+ goto pick_me;
+ }
+
+ if (irm_is_1394_1995_only && !keep_this_irm) {
+ new_root_id = local_id;
+ fw_notice(card, "%s, making local node (%02x) root\n",
+ "IRM is not 1394a compliant", new_root_id);
+ goto pick_me;
+ }
+
+ transaction_data[0] = cpu_to_be32(0x3f);
+ transaction_data[1] = cpu_to_be32(local_id);
+
+ spin_unlock_irq(&card->lock);
+
+ rcode = fw_run_transaction(card, TCODE_LOCK_COMPARE_SWAP,
+ irm_id, generation, SCODE_100,
+ CSR_REGISTER_BASE + CSR_BUS_MANAGER_ID,
+ transaction_data, 8);
+
+ if (rcode == RCODE_GENERATION)
+ /* Another bus reset, BM work has been rescheduled. */
+ goto out;
+
+ bm_id = be32_to_cpu(transaction_data[0]);
+
+ spin_lock_irq(&card->lock);
+ if (rcode == RCODE_COMPLETE && generation == card->generation)
+ card->bm_node_id =
+ bm_id == 0x3f ? local_id : 0xffc0 | bm_id;
+ spin_unlock_irq(&card->lock);
+
+ if (rcode == RCODE_COMPLETE && bm_id != 0x3f) {
+ /* Somebody else is BM. Only act as IRM. */
+ if (local_id == irm_id)
+ allocate_broadcast_channel(card, generation);
+
+ goto out;
+ }
+
+ if (rcode == RCODE_SEND_ERROR) {
+ /*
+ * We have been unable to send the lock request due to
+ * some local problem. Let's try again later and hope
+ * that the problem has gone away by then.
+ */
+ fw_schedule_bm_work(card, DIV_ROUND_UP(HZ, 8));
+ goto out;
+ }
+
+ spin_lock_irq(&card->lock);
+
+ if (rcode != RCODE_COMPLETE && !keep_this_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.
+ */
+ new_root_id = local_id;
+ fw_notice(card, "BM lock failed (%s), making local node (%02x) root\n",
+ fw_rcode_string(rcode), new_root_id);
+ goto pick_me;
+ }
+ } else if (card->bm_generation != generation) {
+ /*
+ * We weren't BM in the last generation, and the last
+ * bus reset is less than 125ms ago. Reschedule this job.
+ */
+ spin_unlock_irq(&card->lock);
+ fw_schedule_bm_work(card, DIV_ROUND_UP(HZ, 8));
+ goto out;
+ }
+
+ /*
+ * 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 (card->gap_count == 0) {
+ /*
+ * If self IDs have inconsistent gap counts, do a
+ * bus reset ASAP. The config rom read might never
+ * complete, so don't wait for it. However, still
+ * send a PHY configuration packet prior to the
+ * bus reset. The PHY configuration packet might
+ * fail, but 1394-2008 8.4.5.2 explicitly permits
+ * it in this case, so it should be safe to try.
+ */
+ new_root_id = local_id;
+ /*
+ * We must always send a bus reset if the gap count
+ * is inconsistent, so bypass the 5-reset limit.
+ */
+ card->bm_retries = 0;
+ } else if (root_device == NULL) {
+ /*
+ * Either link_on is false, or we failed to read the
+ * config rom. In either case, pick another root.
+ */
+ new_root_id = local_id;
+ } else if (!root_device_is_running) {
+ /*
+ * If we haven't probed this device yet, bail out now
+ * and let's try again once that's done.
+ */
+ spin_unlock_irq(&card->lock);
+ goto out;
+ } else if (root_device_is_cmc) {
+ /*
+ * We will send out a force root packet for this
+ * node as part of the gap count optimization.
+ */
+ 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 = local_id;
+ }
+
+ pick_me:
+ /*
+ * Pick a gap count from 1394a table E-1. The table doesn't cover
+ * the typically much larger 1394b beta repeater delays though.
+ */
+ if (!card->beta_repeaters_present &&
+ root_node->max_hops < ARRAY_SIZE(gap_count_table))
+ gap_count = gap_count_table[root_node->max_hops];
+ else
+ gap_count = 63;
+
+ /*
+ * Finally, figure out if we should do a reset or not. If we have
+ * done less than 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 = true;
+
+ spin_unlock_irq(&card->lock);
+
+ if (do_reset) {
+ fw_notice(card, "phy config: new root=%x, gap_count=%d\n",
+ new_root_id, gap_count);
+ fw_send_phy_config(card, new_root_id, generation, gap_count);
+ /*
+ * Where possible, use a short bus reset to minimize
+ * disruption to isochronous transfers. But in the event
+ * of a gap count inconsistency, use a long bus reset.
+ *
+ * As noted in 1394a 8.4.6.2, nodes on a mixed 1394/1394a bus
+ * may set different gap counts after a bus reset. On a mixed
+ * 1394/1394a bus, a short bus reset can get doubled. Some
+ * nodes may treat the double reset as one bus reset and others
+ * may treat it as two, causing a gap count inconsistency
+ * again. Using a long bus reset prevents this.
+ */
+ reset_bus(card, card->gap_count != 0);
+ /* Will allocate broadcast channel after the reset. */
+ goto out;
+ }
+
+ if (root_device_is_cmc) {
+ /*
+ * Make sure that the cycle master sends cycle start packets.
+ */
+ transaction_data[0] = cpu_to_be32(CSR_STATE_BIT_CMSTR);
+ rcode = fw_run_transaction(card, TCODE_WRITE_QUADLET_REQUEST,
+ root_id, generation, SCODE_100,
+ CSR_REGISTER_BASE + CSR_STATE_SET,
+ transaction_data, 4);
+ if (rcode == RCODE_GENERATION)
+ goto out;
+ }
+
+ if (local_id == irm_id)
+ allocate_broadcast_channel(card, generation);
+
+ out:
+ fw_node_put(root_node);
+ out_put_card:
+ fw_card_put(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);
+
+ card->index = atomic_inc_return(&index);
+ card->driver = driver;
+ card->device = device;
+ card->current_tlabel = 0;
+ card->tlabel_mask = 0;
+ card->split_timeout_hi = DEFAULT_SPLIT_TIMEOUT / 8000;
+ card->split_timeout_lo = (DEFAULT_SPLIT_TIMEOUT % 8000) << 19;
+ card->split_timeout_cycles = DEFAULT_SPLIT_TIMEOUT;
+ card->split_timeout_jiffies =
+ DIV_ROUND_UP(DEFAULT_SPLIT_TIMEOUT * HZ, 8000);
+ card->color = 0;
+ card->broadcast_channel = BROADCAST_CHANNEL_INITIAL;
+
+ kref_init(&card->kref);
+ init_completion(&card->done);
+ INIT_LIST_HEAD(&card->transaction_list);
+ INIT_LIST_HEAD(&card->phy_receiver_list);
+ spin_lock_init(&card->lock);
+
+ card->local_node = NULL;
+
+ INIT_DELAYED_WORK(&card->br_work, br_work);
+ INIT_DELAYED_WORK(&card->bm_work, bm_work);
+}
+EXPORT_SYMBOL(fw_card_initialize);
+
+int fw_card_add(struct fw_card *card,
+ u32 max_receive, u32 link_speed, u64 guid)
+{
+ int ret;
+
+ card->max_receive = max_receive;
+ card->link_speed = link_speed;
+ card->guid = guid;
+
+ mutex_lock(&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;
+}
+EXPORT_SYMBOL(fw_card_add);
+
+/*
+ * The next few functions implement a dummy driver that is used 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 (and failed) by the dummy driver
+ * instead of calling into the module. Only functions for iso context
+ * shutdown still need to be provided by the card driver.
+ *
+ * .read/write_csr() should never be called anymore after the dummy driver
+ * was bound since they are only used within request handler context.
+ * .set_config_rom() is never called since the card is taken out of card_list
+ * before switching to the dummy driver.
+ */
+
+static int dummy_read_phy_reg(struct fw_card *card, int address)
+{
+ return -ENODEV;
+}
+
+static int dummy_update_phy_reg(struct fw_card *card, int address,
+ int clear_bits, int set_bits)
+{
+ return -ENODEV;
+}
+
+static void dummy_send_request(struct fw_card *card, struct fw_packet *packet)
+{
+ packet->callback(packet, card, RCODE_CANCELLED);
+}
+
+static void dummy_send_response(struct fw_card *card, struct fw_packet *packet)
+{
+ packet->callback(packet, card, RCODE_CANCELLED);
+}
+
+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_iso_context *dummy_allocate_iso_context(struct fw_card *card,
+ int type, int channel, size_t header_size)
+{
+ return ERR_PTR(-ENODEV);
+}
+
+static int dummy_start_iso(struct fw_iso_context *ctx,
+ s32 cycle, u32 sync, u32 tags)
+{
+ return -ENODEV;
+}
+
+static int dummy_set_iso_channels(struct fw_iso_context *ctx, u64 *channels)
+{
+ return -ENODEV;
+}
+
+static int dummy_queue_iso(struct fw_iso_context *ctx, struct fw_iso_packet *p,
+ struct fw_iso_buffer *buffer, unsigned long payload)
+{
+ return -ENODEV;
+}
+
+static void dummy_flush_queue_iso(struct fw_iso_context *ctx)
+{
+}
+
+static int dummy_flush_iso_completions(struct fw_iso_context *ctx)
+{
+ return -ENODEV;
+}
+
+static const struct fw_card_driver dummy_driver_template = {
+ .read_phy_reg = dummy_read_phy_reg,
+ .update_phy_reg = dummy_update_phy_reg,
+ .send_request = dummy_send_request,
+ .send_response = dummy_send_response,
+ .cancel_packet = dummy_cancel_packet,
+ .enable_phys_dma = dummy_enable_phys_dma,
+ .allocate_iso_context = dummy_allocate_iso_context,
+ .start_iso = dummy_start_iso,
+ .set_iso_channels = dummy_set_iso_channels,
+ .queue_iso = dummy_queue_iso,
+ .flush_queue_iso = dummy_flush_queue_iso,
+ .flush_iso_completions = dummy_flush_iso_completions,
+};
+
+void fw_card_release(struct kref *kref)
+{
+ struct fw_card *card = container_of(kref, struct fw_card, kref);
+
+ complete(&card->done);
+}
+EXPORT_SYMBOL_GPL(fw_card_release);
+
+void fw_core_remove_card(struct fw_card *card)
+{
+ struct fw_card_driver dummy_driver = dummy_driver_template;
+ unsigned long flags;
+
+ card->driver->update_phy_reg(card, 4,
+ PHY_LINK_ACTIVE | PHY_CONTENDER, 0);
+ fw_schedule_bus_reset(card, false, true);
+
+ mutex_lock(&card_mutex);
+ list_del_init(&card->link);
+ mutex_unlock(&card_mutex);
+
+ /* Switch off most of the card driver interface. */
+ dummy_driver.free_iso_context = card->driver->free_iso_context;
+ dummy_driver.stop_iso = card->driver->stop_iso;
+ card->driver = &dummy_driver;
+
+ spin_lock_irqsave(&card->lock, flags);
+ fw_destroy_nodes(card);
+ spin_unlock_irqrestore(&card->lock, flags);
+
+ /* Wait for all users, especially device workqueue jobs, to finish. */
+ fw_card_put(card);
+ wait_for_completion(&card->done);
+
+ WARN_ON(!list_empty(&card->transaction_list));
+}
+EXPORT_SYMBOL(fw_core_remove_card);