#include "config_roms.h"
-static void delayed_reset_bus(void * __reset_info)
+static void delayed_reset_bus(struct work_struct *work)
{
- struct hpsb_host *host = (struct hpsb_host*)__reset_info;
+ struct hpsb_host *host =
+ container_of(work, struct hpsb_host, delayed_reset.work);
int generation = host->csr.generation + 1;
/* The generation field rolls over to 2 rather than 0 per IEEE
CSR_SET_BUS_INFO_GENERATION(host->csr.rom, generation);
if (csr1212_generate_csr_image(host->csr.rom) != CSR1212_SUCCESS) {
- /* CSR image creation failed, reset generation field and do not
- * issue a bus reset. */
- CSR_SET_BUS_INFO_GENERATION(host->csr.rom, host->csr.generation);
+ /* CSR image creation failed.
+ * Reset generation field and do not issue a bus reset. */
+ CSR_SET_BUS_INFO_GENERATION(host->csr.rom,
+ host->csr.generation);
return;
}
host->update_config_rom = 0;
if (host->driver->set_hw_config_rom)
- host->driver->set_hw_config_rom(host, host->csr.rom->bus_info_data);
+ host->driver->set_hw_config_rom(host,
+ host->csr.rom->bus_info_data);
host->csr.gen_timestamp[host->csr.generation] = jiffies;
hpsb_reset_bus(host, SHORT_RESET);
return -1;
}
-static int dummy_isoctl(struct hpsb_iso *iso, enum isoctl_cmd command, unsigned long arg)
+static int dummy_isoctl(struct hpsb_iso *iso, enum isoctl_cmd command,
+ unsigned long arg)
{
return -1;
}
return 0;
}
+/*
+ * The pending_packet_queue is special in that it's processed
+ * from hardirq context too (such as hpsb_bus_reset()). Hence
+ * split the lock class from the usual networking skb-head
+ * lock class by using a separate key for it:
+ */
+static struct lock_class_key pending_packet_queue_key;
+
+static DEFINE_MUTEX(host_num_alloc);
+
/**
* hpsb_alloc_host - allocate a new host controller.
* @drv: the driver that will manage the host controller
* Return Value: a pointer to the &hpsb_host if successful, %NULL if
* no memory was available.
*/
-static DEFINE_MUTEX(host_num_alloc);
-
struct hpsb_host *hpsb_alloc_host(struct hpsb_host_driver *drv, size_t extra,
struct device *dev)
{
int i;
int hostnum = 0;
- h = kzalloc(sizeof(*h) + extra, SLAB_KERNEL);
+ h = kzalloc(sizeof(*h) + extra, GFP_KERNEL);
if (!h)
return NULL;
h->csr.rom = csr1212_create_csr(&csr_bus_ops, CSR_BUS_INFO_SIZE, h);
- if (!h->csr.rom) {
- kfree(h);
- return NULL;
- }
+ if (!h->csr.rom)
+ goto fail;
h->hostdata = h + 1;
h->driver = drv;
skb_queue_head_init(&h->pending_packet_queue);
+ lockdep_set_class(&h->pending_packet_queue.lock,
+ &pending_packet_queue_key);
INIT_LIST_HEAD(&h->addr_space);
for (i = 2; i < 16; i++)
h->csr.gen_timestamp[i] = jiffies - 60 * HZ;
- for (i = 0; i < ARRAY_SIZE(h->tpool); i++)
- HPSB_TPOOL_INIT(&h->tpool[i]);
-
atomic_set(&h->generation, 0);
- INIT_WORK(&h->delayed_reset, delayed_reset_bus, h);
+ INIT_DELAYED_WORK(&h->delayed_reset, delayed_reset_bus);
init_timer(&h->timeout);
h->timeout.data = (unsigned long) h;
h->timeout.function = abort_timedouts;
- h->timeout_interval = HZ / 20; // 50ms by default
+ h->timeout_interval = HZ / 20; /* 50ms, half of minimum SPLIT_TIMEOUT */
h->topology_map = h->csr.topology_map + 3;
h->speed_map = (u8 *)(h->csr.speed_map + 2);
mutex_lock(&host_num_alloc);
-
while (nodemgr_for_each_host(&hostnum, alloc_hostnum_cb))
hostnum++;
-
+ mutex_unlock(&host_num_alloc);
h->id = hostnum;
memcpy(&h->device, &nodemgr_dev_template_host, sizeof(h->device));
h->class_dev.class = &hpsb_host_class;
snprintf(h->class_dev.class_id, BUS_ID_SIZE, "fw-host%d", h->id);
- device_register(&h->device);
- class_device_register(&h->class_dev);
+ if (device_register(&h->device))
+ goto fail;
+ if (class_device_register(&h->class_dev)) {
+ device_unregister(&h->device);
+ goto fail;
+ }
get_device(&h->device);
- mutex_unlock(&host_num_alloc);
-
return h;
+
+fail:
+ kfree(h);
+ return NULL;
}
int hpsb_add_host(struct hpsb_host *host)
{
if (hpsb_default_host_entry(host))
return -ENOMEM;
-
hpsb_add_extra_config_roms(host);
-
highlevel_add_host(host);
-
return 0;
}
+void hpsb_resume_host(struct hpsb_host *host)
+{
+ if (host->driver->set_hw_config_rom)
+ host->driver->set_hw_config_rom(host,
+ host->csr.rom->bus_info_data);
+ host->driver->devctl(host, RESET_BUS, SHORT_RESET);
+}
+
void hpsb_remove_host(struct hpsb_host *host)
{
host->is_shutdown = 1;
flush_scheduled_work();
host->driver = &dummy_driver;
-
highlevel_remove_host(host);
-
hpsb_remove_extra_config_roms(host);
class_device_unregister(&host->class_dev);
if (time_before(jiffies, host->csr.gen_timestamp[next_gen] + 60 * HZ))
/* Wait 60 seconds from the last time this generation number was
* used. */
- reset_delay = (60 * HZ) + host->csr.gen_timestamp[next_gen] - jiffies;
+ reset_delay =
+ (60 * HZ) + host->csr.gen_timestamp[next_gen] - jiffies;
else
/* Wait 1 second in case some other code wants to change the
* Config ROM in the near future. */
reset_delay = HZ;
- PREPARE_WORK(&host->delayed_reset, delayed_reset_bus, host);
+ PREPARE_DELAYED_WORK(&host->delayed_reset, delayed_reset_bus);
schedule_delayed_work(&host->delayed_reset, reset_delay);
return 0;
projects / linux-drm-fsl-dcu.git / blobdiff