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Diffstat (limited to 'drivers/firewire')
-rw-r--r--drivers/firewire/fw-card.c33
-rw-r--r--drivers/firewire/fw-device.c31
-rw-r--r--drivers/firewire/fw-device.h2
-rw-r--r--drivers/firewire/fw-sbp2.c21
-rw-r--r--drivers/firewire/fw-topology.c16
-rw-r--r--drivers/firewire/fw-transaction.c2
-rw-r--r--drivers/firewire/fw-transaction.h13
7 files changed, 62 insertions, 56 deletions
diff --git a/drivers/firewire/fw-card.c b/drivers/firewire/fw-card.c
index 418c18f07e9d..6bd91a15d5e6 100644
--- a/drivers/firewire/fw-card.c
+++ b/drivers/firewire/fw-card.c
@@ -75,7 +75,7 @@ generate_config_rom(struct fw_card *card, size_t *config_rom_length)
* 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
+ * sure the contents of bus info block in host memory matches
* the version stored in the OHCI registers.
*/
@@ -189,6 +189,17 @@ 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)
+{
+ int scheduled;
+
+ fw_card_get(card);
+ scheduled = schedule_delayed_work(&card->work, delay);
+ if (!scheduled)
+ fw_card_put(card);
+}
+
static void
fw_card_bm_work(struct work_struct *work)
{
@@ -198,6 +209,8 @@ fw_card_bm_work(struct work_struct *work)
unsigned long flags;
int root_id, new_root_id, irm_id, gap_count, generation, grace, rcode;
bool do_reset = false;
+ bool root_device_is_running;
+ bool root_device_is_cmc;
__be32 lock_data[2];
spin_lock_irqsave(&card->lock, flags);
@@ -206,15 +219,16 @@ fw_card_bm_work(struct work_struct *work)
if (local_node == NULL) {
spin_unlock_irqrestore(&card->lock, flags);
- return;
+ goto out_put_card;
}
fw_node_get(local_node);
fw_node_get(root_node);
generation = card->generation;
root_device = root_node->data;
- if (root_device)
- fw_device_get(root_device);
+ root_device_is_running = root_device &&
+ atomic_read(&root_device->state) == FW_DEVICE_RUNNING;
+ root_device_is_cmc = root_device && root_device->cmc;
root_id = root_node->node_id;
grace = time_after(jiffies, card->reset_jiffies + DIV_ROUND_UP(HZ, 10));
@@ -280,7 +294,7 @@ fw_card_bm_work(struct work_struct *work)
* this task 100ms from now.
*/
spin_unlock_irqrestore(&card->lock, flags);
- schedule_delayed_work(&card->work, DIV_ROUND_UP(HZ, 10));
+ fw_schedule_bm_work(card, DIV_ROUND_UP(HZ, 10));
goto out;
}
@@ -297,14 +311,14 @@ fw_card_bm_work(struct work_struct *work)
* config rom. In either case, pick another root.
*/
new_root_id = local_node->node_id;
- } else if (atomic_read(&root_device->state) != FW_DEVICE_RUNNING) {
+ } 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_irqrestore(&card->lock, flags);
goto out;
- } else if (root_device->cmc) {
+ } else if (root_device_is_cmc) {
/*
* FIXME: I suppose we should set the cmstr bit in the
* STATE_CLEAR register of this node, as described in
@@ -351,10 +365,10 @@ fw_card_bm_work(struct work_struct *work)
fw_core_initiate_bus_reset(card, 1);
}
out:
- if (root_device)
- fw_device_put(root_device);
fw_node_put(root_node);
fw_node_put(local_node);
+ out_put_card:
+ fw_card_put(card);
}
static void
@@ -510,7 +524,6 @@ fw_core_remove_card(struct fw_card *card)
fw_card_put(card);
wait_for_completion(&card->done);
- cancel_delayed_work_sync(&card->work);
WARN_ON(!list_empty(&card->transaction_list));
del_timer_sync(&card->flush_timer);
}
diff --git a/drivers/firewire/fw-device.c b/drivers/firewire/fw-device.c
index 6b9be42c7b98..2af5a8d1e012 100644
--- a/drivers/firewire/fw-device.c
+++ b/drivers/firewire/fw-device.c
@@ -159,7 +159,8 @@ static void fw_device_release(struct device *dev)
/*
* Take the card lock so we don't set this to NULL while a
- * FW_NODE_UPDATED callback is being handled.
+ * FW_NODE_UPDATED callback is being handled or while the
+ * bus manager work looks at this node.
*/
spin_lock_irqsave(&card->lock, flags);
device->node->data = NULL;
@@ -617,7 +618,7 @@ static int shutdown_unit(struct device *device, void *data)
*/
DECLARE_RWSEM(fw_device_rwsem);
-static DEFINE_IDR(fw_device_idr);
+DEFINE_IDR(fw_device_idr);
int fw_cdev_major;
struct fw_device *fw_device_get_by_devt(dev_t devt)
@@ -689,18 +690,19 @@ static void fw_device_init(struct work_struct *work)
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_schedule_bm_work(device->card, 0);
fw_device_release(&device->device);
}
return;
}
- err = -ENOMEM;
+ device_initialize(&device->device);
fw_device_get(device);
down_write(&fw_device_rwsem);
- if (idr_pre_get(&fw_device_idr, GFP_KERNEL))
- err = idr_get_new(&fw_device_idr, device, &minor);
+ err = idr_pre_get(&fw_device_idr, GFP_KERNEL) ?
+ idr_get_new(&fw_device_idr, device, &minor) :
+ -ENOMEM;
up_write(&fw_device_rwsem);
if (err < 0)
@@ -758,7 +760,7 @@ static void fw_device_init(struct work_struct *work)
* pretty harmless.
*/
if (device->node == device->card->root_node)
- schedule_delayed_work(&device->card->work, 0);
+ fw_schedule_bm_work(device->card, 0);
return;
@@ -892,7 +894,7 @@ static void fw_device_refresh(struct work_struct *work)
fw_device_shutdown(work);
out:
if (node_id == card->root_node->node_id)
- schedule_delayed_work(&card->work, 0);
+ fw_schedule_bm_work(card, 0);
}
void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
@@ -911,13 +913,14 @@ void fw_node_event(struct fw_card *card, struct fw_node *node, int event)
/*
* 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.
+ * rest will happen in fw_device_init().
+ *
+ * Attention: A lot of things, even fw_device_get(),
+ * cannot be done before fw_device_init() finished!
+ * You can basically just check device->state and
+ * schedule work until then, but only while holding
+ * card->lock.
*/
- device_initialize(&device->device);
atomic_set(&device->state, FW_DEVICE_INITIALIZING);
device->card = fw_card_get(card);
device->node = fw_node_get(node);
diff --git a/drivers/firewire/fw-device.h b/drivers/firewire/fw-device.h
index 42305bbac72f..df51732608d9 100644
--- a/drivers/firewire/fw-device.h
+++ b/drivers/firewire/fw-device.h
@@ -21,6 +21,7 @@
#include <linux/fs.h>
#include <linux/cdev.h>
+#include <linux/idr.h>
#include <linux/rwsem.h>
#include <asm/atomic.h>
@@ -99,6 +100,7 @@ void fw_device_cdev_update(struct fw_device *device);
void fw_device_cdev_remove(struct fw_device *device);
extern struct rw_semaphore fw_device_rwsem;
+extern struct idr fw_device_idr;
extern int fw_cdev_major;
/*
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c
index e54403ee59e7..e88d5067448c 100644
--- a/drivers/firewire/fw-sbp2.c
+++ b/drivers/firewire/fw-sbp2.c
@@ -670,17 +670,6 @@ static void sbp2_agent_reset_no_wait(struct sbp2_logical_unit *lu)
&d, sizeof(d), complete_agent_reset_write_no_wait, t);
}
-static void sbp2_set_generation(struct sbp2_logical_unit *lu, int generation)
-{
- struct fw_card *card = fw_device(lu->tgt->unit->device.parent)->card;
- unsigned long flags;
-
- /* serialize with comparisons of lu->generation and card->generation */
- spin_lock_irqsave(&card->lock, flags);
- lu->generation = generation;
- spin_unlock_irqrestore(&card->lock, flags);
-}
-
static inline void sbp2_allow_block(struct sbp2_logical_unit *lu)
{
/*
@@ -884,7 +873,7 @@ static void sbp2_login(struct work_struct *work)
goto out;
generation = device->generation;
- smp_rmb(); /* node_id must not be older than generation */
+ smp_rmb(); /* node IDs must not be older than generation */
node_id = device->node_id;
local_node_id = device->card->node_id;
@@ -908,7 +897,8 @@ static void sbp2_login(struct work_struct *work)
tgt->node_id = node_id;
tgt->address_high = local_node_id << 16;
- sbp2_set_generation(lu, generation);
+ smp_wmb(); /* node IDs must not be older than generation */
+ lu->generation = generation;
lu->command_block_agent_address =
((u64)(be32_to_cpu(response.command_block_agent.high) & 0xffff)
@@ -1201,7 +1191,7 @@ static void sbp2_reconnect(struct work_struct *work)
goto out;
generation = device->generation;
- smp_rmb(); /* node_id must not be older than generation */
+ smp_rmb(); /* node IDs must not be older than generation */
node_id = device->node_id;
local_node_id = device->card->node_id;
@@ -1228,7 +1218,8 @@ static void sbp2_reconnect(struct work_struct *work)
tgt->node_id = node_id;
tgt->address_high = local_node_id << 16;
- sbp2_set_generation(lu, generation);
+ smp_wmb(); /* node IDs must not be older than generation */
+ lu->generation = generation;
fw_notify("%s: reconnected to LUN %04x (%d retries)\n",
tgt->bus_id, lu->lun, lu->retries);
diff --git a/drivers/firewire/fw-topology.c b/drivers/firewire/fw-topology.c
index 5e204713002d..c9be6e6948c4 100644
--- a/drivers/firewire/fw-topology.c
+++ b/drivers/firewire/fw-topology.c
@@ -355,6 +355,9 @@ report_lost_node(struct fw_card *card,
{
fw_node_event(card, node, FW_NODE_DESTROYED);
fw_node_put(node);
+
+ /* Topology has changed - reset bus manager retry counter */
+ card->bm_retries = 0;
}
static void
@@ -374,6 +377,9 @@ report_found_node(struct fw_card *card,
}
fw_node_event(card, node, FW_NODE_CREATED);
+
+ /* Topology has changed - reset bus manager retry counter */
+ card->bm_retries = 0;
}
void fw_destroy_nodes(struct fw_card *card)
@@ -514,14 +520,6 @@ 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
- * 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;
/*
* Update node_id before generation to prevent anybody from using
@@ -530,7 +528,7 @@ fw_core_handle_bus_reset(struct fw_card *card,
smp_wmb();
card->generation = generation;
card->reset_jiffies = jiffies;
- schedule_delayed_work(&card->work, 0);
+ fw_schedule_bm_work(card, 0);
local_node = build_tree(card, self_ids, self_id_count);
diff --git a/drivers/firewire/fw-transaction.c b/drivers/firewire/fw-transaction.c
index 2884f876397b..699ac041f39a 100644
--- a/drivers/firewire/fw-transaction.c
+++ b/drivers/firewire/fw-transaction.c
@@ -19,6 +19,7 @@
*/
#include <linux/completion.h>
+#include <linux/idr.h>
#include <linux/kernel.h>
#include <linux/kref.h>
#include <linux/module.h>
@@ -971,6 +972,7 @@ static void __exit fw_core_cleanup(void)
{
unregister_chrdev(fw_cdev_major, "firewire");
bus_unregister(&fw_bus_type);
+ idr_destroy(&fw_device_idr);
}
module_init(fw_core_init);
diff --git a/drivers/firewire/fw-transaction.h b/drivers/firewire/fw-transaction.h
index 839466f0a795..c9ab12a15f6e 100644
--- a/drivers/firewire/fw-transaction.h
+++ b/drivers/firewire/fw-transaction.h
@@ -237,14 +237,6 @@ 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.
- */
- int self_id_count;
- u32 topology_map[252 + 3];
- u32 broadcast_channel;
-
spinlock_t lock; /* Take this lock when handling the lists in
* this struct. */
struct fw_node *local_node;
@@ -262,6 +254,9 @@ struct fw_card {
struct delayed_work work;
int bm_retries;
int bm_generation;
+
+ u32 broadcast_channel;
+ u32 topology_map[(CSR_TOPOLOGY_MAP_END - CSR_TOPOLOGY_MAP) / 4];
};
static inline struct fw_card *fw_card_get(struct fw_card *card)
@@ -278,6 +273,8 @@ static inline void fw_card_put(struct fw_card *card)
kref_put(&card->kref, fw_card_release);
}
+extern void fw_schedule_bm_work(struct fw_card *card, unsigned long delay);
+
/*
* The iso packet format allows for an immediate header/payload part
* stored in 'header' immediately after the packet info plus an
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 21:33:43 +0000