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path: root/drivers/ieee1394/nodemgr.c
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Diffstat (limited to 'drivers/ieee1394/nodemgr.c')
-rw-r--r--drivers/ieee1394/nodemgr.c1901
1 files changed, 0 insertions, 1901 deletions
diff --git a/drivers/ieee1394/nodemgr.c b/drivers/ieee1394/nodemgr.c
deleted file mode 100644
index 18350213479..00000000000
--- a/drivers/ieee1394/nodemgr.c
+++ /dev/null
@@ -1,1901 +0,0 @@
-/*
- * Node information (ConfigROM) collection and management.
- *
- * Copyright (C) 2000 Andreas E. Bombe
- * 2001-2003 Ben Collins <bcollins@debian.net>
- *
- * This code is licensed under the GPL. See the file COPYING in the root
- * directory of the kernel sources for details.
- */
-
-#include <linux/bitmap.h>
-#include <linux/kernel.h>
-#include <linux/kmemcheck.h>
-#include <linux/list.h>
-#include <linux/slab.h>
-#include <linux/delay.h>
-#include <linux/kthread.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/mutex.h>
-#include <linux/freezer.h>
-#include <asm/atomic.h>
-
-#include "csr.h"
-#include "highlevel.h"
-#include "hosts.h"
-#include "ieee1394.h"
-#include "ieee1394_core.h"
-#include "ieee1394_hotplug.h"
-#include "ieee1394_types.h"
-#include "ieee1394_transactions.h"
-#include "nodemgr.h"
-
-static int ignore_drivers;
-module_param(ignore_drivers, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
-
-struct nodemgr_csr_info {
- struct hpsb_host *host;
- nodeid_t nodeid;
- unsigned int generation;
-
- kmemcheck_bitfield_begin(flags);
- unsigned int speed_unverified:1;
- kmemcheck_bitfield_end(flags);
-};
-
-
-/*
- * Correct the speed map entry. This is necessary
- * - for nodes with link speed < phy speed,
- * - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
- * A possible speed is determined by trial and error, using quadlet reads.
- */
-static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
- quadlet_t *buffer)
-{
- quadlet_t q;
- u8 i, *speed, old_speed, good_speed;
- int error;
-
- speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
- old_speed = *speed;
- good_speed = IEEE1394_SPEED_MAX + 1;
-
- /* Try every speed from S100 to old_speed.
- * If we did it the other way around, a too low speed could be caught
- * if the retry succeeded for some other reason, e.g. because the link
- * just finished its initialization. */
- for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
- *speed = i;
- error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
- &q, 4);
- if (error)
- break;
- *buffer = q;
- good_speed = i;
- }
- if (good_speed <= IEEE1394_SPEED_MAX) {
- HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
- NODE_BUS_ARGS(ci->host, ci->nodeid),
- hpsb_speedto_str[good_speed]);
- *speed = good_speed;
- ci->speed_unverified = 0;
- return 0;
- }
- *speed = old_speed;
- return error;
-}
-
-static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr,
- void *buffer, void *__ci)
-{
- struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
- int i, error;
-
- for (i = 1; ; i++) {
- error = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
- buffer, 4);
- if (!error) {
- ci->speed_unverified = 0;
- break;
- }
- /* Give up after 3rd failure. */
- if (i == 3)
- break;
-
- /* The ieee1394_core guessed the node's speed capability from
- * the self ID. Check whether a lower speed works. */
- if (ci->speed_unverified) {
- error = nodemgr_check_speed(ci, addr, buffer);
- if (!error)
- break;
- }
- if (msleep_interruptible(334))
- return -EINTR;
- }
- return error;
-}
-
-static struct csr1212_bus_ops nodemgr_csr_ops = {
- .bus_read = nodemgr_bus_read,
-};
-
-
-/*
- * Basically what we do here is start off retrieving the bus_info block.
- * From there will fill in some info about the node, verify it is of IEEE
- * 1394 type, and that the crc checks out ok. After that we start off with
- * the root directory, and subdirectories. To do this, we retrieve the
- * quadlet header for a directory, find out the length, and retrieve the
- * complete directory entry (be it a leaf or a directory). We then process
- * it and add the info to our structure for that particular node.
- *
- * We verify CRC's along the way for each directory/block/leaf. The entire
- * node structure is generic, and simply stores the information in a way
- * that's easy to parse by the protocol interface.
- */
-
-/*
- * The nodemgr relies heavily on the Driver Model for device callbacks and
- * driver/device mappings. The old nodemgr used to handle all this itself,
- * but now we are much simpler because of the LDM.
- */
-
-struct host_info {
- struct hpsb_host *host;
- struct list_head list;
- struct task_struct *thread;
-};
-
-static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
-static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env);
-
-struct bus_type ieee1394_bus_type = {
- .name = "ieee1394",
- .match = nodemgr_bus_match,
-};
-
-static void host_cls_release(struct device *dev)
-{
- put_device(&container_of((dev), struct hpsb_host, host_dev)->device);
-}
-
-struct class hpsb_host_class = {
- .name = "ieee1394_host",
- .dev_release = host_cls_release,
-};
-
-static void ne_cls_release(struct device *dev)
-{
- put_device(&container_of((dev), struct node_entry, node_dev)->device);
-}
-
-static struct class nodemgr_ne_class = {
- .name = "ieee1394_node",
- .dev_release = ne_cls_release,
-};
-
-static void ud_cls_release(struct device *dev)
-{
- put_device(&container_of((dev), struct unit_directory, unit_dev)->device);
-}
-
-/* The name here is only so that unit directory hotplug works with old
- * style hotplug, which only ever did unit directories anyway.
- */
-static struct class nodemgr_ud_class = {
- .name = "ieee1394",
- .dev_release = ud_cls_release,
- .dev_uevent = nodemgr_uevent,
-};
-
-static struct hpsb_highlevel nodemgr_highlevel;
-
-
-static void nodemgr_release_ud(struct device *dev)
-{
- struct unit_directory *ud = container_of(dev, struct unit_directory, device);
-
- if (ud->vendor_name_kv)
- csr1212_release_keyval(ud->vendor_name_kv);
- if (ud->model_name_kv)
- csr1212_release_keyval(ud->model_name_kv);
-
- kfree(ud);
-}
-
-static void nodemgr_release_ne(struct device *dev)
-{
- struct node_entry *ne = container_of(dev, struct node_entry, device);
-
- if (ne->vendor_name_kv)
- csr1212_release_keyval(ne->vendor_name_kv);
-
- kfree(ne);
-}
-
-
-static void nodemgr_release_host(struct device *dev)
-{
- struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
-
- csr1212_destroy_csr(host->csr.rom);
-
- kfree(host);
-}
-
-static int nodemgr_ud_platform_data;
-
-static struct device nodemgr_dev_template_ud = {
- .bus = &ieee1394_bus_type,
- .release = nodemgr_release_ud,
- .platform_data = &nodemgr_ud_platform_data,
-};
-
-static struct device nodemgr_dev_template_ne = {
- .bus = &ieee1394_bus_type,
- .release = nodemgr_release_ne,
-};
-
-/* This dummy driver prevents the host devices from being scanned. We have no
- * useful drivers for them yet, and there would be a deadlock possible if the
- * driver core scans the host device while the host's low-level driver (i.e.
- * the host's parent device) is being removed. */
-static struct device_driver nodemgr_mid_layer_driver = {
- .bus = &ieee1394_bus_type,
- .name = "nodemgr",
- .owner = THIS_MODULE,
-};
-
-struct device nodemgr_dev_template_host = {
- .bus = &ieee1394_bus_type,
- .release = nodemgr_release_host,
-};
-
-
-#define fw_attr(class, class_type, field, type, format_string) \
-static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
-{ \
- class_type *class; \
- class = container_of(dev, class_type, device); \
- return sprintf(buf, format_string, (type)class->field); \
-} \
-static struct device_attribute dev_attr_##class##_##field = { \
- .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
- .show = fw_show_##class##_##field, \
-};
-
-#define fw_attr_td(class, class_type, td_kv) \
-static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
-{ \
- int len; \
- class_type *class = container_of(dev, class_type, device); \
- len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
- memcpy(buf, \
- CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
- len); \
- while (buf[len - 1] == '\0') \
- len--; \
- buf[len++] = '\n'; \
- buf[len] = '\0'; \
- return len; \
-} \
-static struct device_attribute dev_attr_##class##_##td_kv = { \
- .attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
- .show = fw_show_##class##_##td_kv, \
-};
-
-
-#define fw_drv_attr(field, type, format_string) \
-static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
-{ \
- struct hpsb_protocol_driver *driver; \
- driver = container_of(drv, struct hpsb_protocol_driver, driver); \
- return sprintf(buf, format_string, (type)driver->field);\
-} \
-static struct driver_attribute driver_attr_drv_##field = { \
- .attr = {.name = __stringify(field), .mode = S_IRUGO }, \
- .show = fw_drv_show_##field, \
-};
-
-
-static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct node_entry *ne = container_of(dev, struct node_entry, device);
-
- return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
- "LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
- ne->busopt.irmc,
- ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
- ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
- ne->busopt.max_rec,
- ne->busopt.max_rom,
- ne->busopt.cyc_clk_acc);
-}
-static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
-
-
-#ifdef HPSB_DEBUG_TLABELS
-static ssize_t fw_show_ne_tlabels_free(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct node_entry *ne = container_of(dev, struct node_entry, device);
- unsigned long flags;
- unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
- int tf;
-
- spin_lock_irqsave(&hpsb_tlabel_lock, flags);
- tf = 64 - bitmap_weight(tp, 64);
- spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
-
- return sprintf(buf, "%d\n", tf);
-}
-static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
-
-
-static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct node_entry *ne = container_of(dev, struct node_entry, device);
- unsigned long flags;
- unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
- u64 tm;
-
- spin_lock_irqsave(&hpsb_tlabel_lock, flags);
-#if (BITS_PER_LONG <= 32)
- tm = ((u64)tp[0] << 32) + tp[1];
-#else
- tm = tp[0];
-#endif
- spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
-
- return sprintf(buf, "0x%016llx\n", (unsigned long long)tm);
-}
-static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
-#endif /* HPSB_DEBUG_TLABELS */
-
-
-static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
-{
- struct unit_directory *ud = container_of(dev, struct unit_directory, device);
- int state = simple_strtoul(buf, NULL, 10);
-
- if (state == 1) {
- ud->ignore_driver = 1;
- device_release_driver(dev);
- } else if (state == 0)
- ud->ignore_driver = 0;
-
- return count;
-}
-static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct unit_directory *ud = container_of(dev, struct unit_directory, device);
-
- return sprintf(buf, "%d\n", ud->ignore_driver);
-}
-static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
-
-
-static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf,
- size_t count)
-{
- int error = 0;
-
- if (simple_strtoul(buf, NULL, 10) == 1)
- error = bus_rescan_devices(&ieee1394_bus_type);
- return error ? error : count;
-}
-static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
-{
- return sprintf(buf, "You can force a rescan of the bus for "
- "drivers by writing a 1 to this file\n");
-}
-static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
-
-
-static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
-{
- int state = simple_strtoul(buf, NULL, 10);
-
- if (state == 1)
- ignore_drivers = 1;
- else if (state == 0)
- ignore_drivers = 0;
-
- return count;
-}
-static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
-{
- return sprintf(buf, "%d\n", ignore_drivers);
-}
-static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
-
-
-struct bus_attribute *const fw_bus_attrs[] = {
- &bus_attr_rescan,
- &bus_attr_ignore_drivers,
- NULL
-};
-
-
-fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
-fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
-
-fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
-fw_attr_td(ne, struct node_entry, vendor_name_kv)
-
-fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
-fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
-fw_attr(ne, struct node_entry, in_limbo, int, "%d\n");
-
-static struct device_attribute *const fw_ne_attrs[] = {
- &dev_attr_ne_guid,
- &dev_attr_ne_guid_vendor_id,
- &dev_attr_ne_capabilities,
- &dev_attr_ne_vendor_id,
- &dev_attr_ne_nodeid,
- &dev_attr_bus_options,
-#ifdef HPSB_DEBUG_TLABELS
- &dev_attr_tlabels_free,
- &dev_attr_tlabels_mask,
-#endif
-};
-
-
-
-fw_attr(ud, struct unit_directory, address, unsigned long long, "0x%016Lx\n")
-fw_attr(ud, struct unit_directory, length, int, "%d\n")
-/* These are all dependent on the value being provided */
-fw_attr(ud, struct unit_directory, vendor_id, unsigned int, "0x%06x\n")
-fw_attr(ud, struct unit_directory, model_id, unsigned int, "0x%06x\n")
-fw_attr(ud, struct unit_directory, specifier_id, unsigned int, "0x%06x\n")
-fw_attr(ud, struct unit_directory, version, unsigned int, "0x%06x\n")
-fw_attr_td(ud, struct unit_directory, vendor_name_kv)
-fw_attr_td(ud, struct unit_directory, model_name_kv)
-
-static struct device_attribute *const fw_ud_attrs[] = {
- &dev_attr_ud_address,
- &dev_attr_ud_length,
- &dev_attr_ignore_driver,
-};
-
-
-fw_attr(host, struct hpsb_host, node_count, int, "%d\n")
-fw_attr(host, struct hpsb_host, selfid_count, int, "%d\n")
-fw_attr(host, struct hpsb_host, nodes_active, int, "%d\n")
-fw_attr(host, struct hpsb_host, in_bus_reset, int, "%d\n")
-fw_attr(host, struct hpsb_host, is_root, int, "%d\n")
-fw_attr(host, struct hpsb_host, is_cycmst, int, "%d\n")
-fw_attr(host, struct hpsb_host, is_irm, int, "%d\n")
-fw_attr(host, struct hpsb_host, is_busmgr, int, "%d\n")
-
-static struct device_attribute *const fw_host_attrs[] = {
- &dev_attr_host_node_count,
- &dev_attr_host_selfid_count,
- &dev_attr_host_nodes_active,
- &dev_attr_host_in_bus_reset,
- &dev_attr_host_is_root,
- &dev_attr_host_is_cycmst,
- &dev_attr_host_is_irm,
- &dev_attr_host_is_busmgr,
-};
-
-
-static ssize_t fw_show_drv_device_ids(struct device_driver *drv, char *buf)
-{
- struct hpsb_protocol_driver *driver;
- const struct ieee1394_device_id *id;
- int length = 0;
- char *scratch = buf;
-
- driver = container_of(drv, struct hpsb_protocol_driver, driver);
- id = driver->id_table;
- if (!id)
- return 0;
-
- for (; id->match_flags != 0; id++) {
- int need_coma = 0;
-
- if (id->match_flags & IEEE1394_MATCH_VENDOR_ID) {
- length += sprintf(scratch, "vendor_id=0x%06x", id->vendor_id);
- scratch = buf + length;
- need_coma++;
- }
-
- if (id->match_flags & IEEE1394_MATCH_MODEL_ID) {
- length += sprintf(scratch, "%smodel_id=0x%06x",
- need_coma++ ? "," : "",
- id->model_id);
- scratch = buf + length;
- }
-
- if (id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) {
- length += sprintf(scratch, "%sspecifier_id=0x%06x",
- need_coma++ ? "," : "",
- id->specifier_id);
- scratch = buf + length;
- }
-
- if (id->match_flags & IEEE1394_MATCH_VERSION) {
- length += sprintf(scratch, "%sversion=0x%06x",
- need_coma++ ? "," : "",
- id->version);
- scratch = buf + length;
- }
-
- if (need_coma) {
- *scratch++ = '\n';
- length++;
- }
- }
-
- return length;
-}
-static DRIVER_ATTR(device_ids,S_IRUGO,fw_show_drv_device_ids,NULL);
-
-
-fw_drv_attr(name, const char *, "%s\n")
-
-static struct driver_attribute *const fw_drv_attrs[] = {
- &driver_attr_drv_name,
- &driver_attr_device_ids,
-};
-
-
-static void nodemgr_create_drv_files(struct hpsb_protocol_driver *driver)
-{
- struct device_driver *drv = &driver->driver;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
- if (driver_create_file(drv, fw_drv_attrs[i]))
- goto fail;
- return;
-fail:
- HPSB_ERR("Failed to add sysfs attribute");
-}
-
-
-static void nodemgr_remove_drv_files(struct hpsb_protocol_driver *driver)
-{
- struct device_driver *drv = &driver->driver;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(fw_drv_attrs); i++)
- driver_remove_file(drv, fw_drv_attrs[i]);
-}
-
-
-static void nodemgr_create_ne_dev_files(struct node_entry *ne)
-{
- struct device *dev = &ne->device;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(fw_ne_attrs); i++)
- if (device_create_file(dev, fw_ne_attrs[i]))
- goto fail;
- return;
-fail:
- HPSB_ERR("Failed to add sysfs attribute");
-}
-
-
-static void nodemgr_create_host_dev_files(struct hpsb_host *host)
-{
- struct device *dev = &host->device;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(fw_host_attrs); i++)
- if (device_create_file(dev, fw_host_attrs[i]))
- goto fail;
- return;
-fail:
- HPSB_ERR("Failed to add sysfs attribute");
-}
-
-
-static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
- nodeid_t nodeid);
-
-static void nodemgr_update_host_dev_links(struct hpsb_host *host)
-{
- struct device *dev = &host->device;
- struct node_entry *ne;
-
- sysfs_remove_link(&dev->kobj, "irm_id");
- sysfs_remove_link(&dev->kobj, "busmgr_id");
- sysfs_remove_link(&dev->kobj, "host_id");
-
- if ((ne = find_entry_by_nodeid(host, host->irm_id)) &&
- sysfs_create_link(&dev->kobj, &ne->device.kobj, "irm_id"))
- goto fail;
- if ((ne = find_entry_by_nodeid(host, host->busmgr_id)) &&
- sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id"))
- goto fail;
- if ((ne = find_entry_by_nodeid(host, host->node_id)) &&
- sysfs_create_link(&dev->kobj, &ne->device.kobj, "host_id"))
- goto fail;
- return;
-fail:
- HPSB_ERR("Failed to update sysfs attributes for host %d", host->id);
-}
-
-static void nodemgr_create_ud_dev_files(struct unit_directory *ud)
-{
- struct device *dev = &ud->device;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(fw_ud_attrs); i++)
- if (device_create_file(dev, fw_ud_attrs[i]))
- goto fail;
- if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
- if (device_create_file(dev, &dev_attr_ud_specifier_id))
- goto fail;
- if (ud->flags & UNIT_DIRECTORY_VERSION)
- if (device_create_file(dev, &dev_attr_ud_version))
- goto fail;
- if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
- if (device_create_file(dev, &dev_attr_ud_vendor_id))
- goto fail;
- if (ud->vendor_name_kv &&
- device_create_file(dev, &dev_attr_ud_vendor_name_kv))
- goto fail;
- }
- if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
- if (device_create_file(dev, &dev_attr_ud_model_id))
- goto fail;
- if (ud->model_name_kv &&
- device_create_file(dev, &dev_attr_ud_model_name_kv))
- goto fail;
- }
- return;
-fail:
- HPSB_ERR("Failed to add sysfs attribute");
-}
-
-
-static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
-{
- struct hpsb_protocol_driver *driver;
- struct unit_directory *ud;
- const struct ieee1394_device_id *id;
-
- /* We only match unit directories */
- if (dev->platform_data != &nodemgr_ud_platform_data)
- return 0;
-
- ud = container_of(dev, struct unit_directory, device);
- if (ud->ne->in_limbo || ud->ignore_driver)
- return 0;
-
- /* We only match drivers of type hpsb_protocol_driver */
- if (drv == &nodemgr_mid_layer_driver)
- return 0;
-
- driver = container_of(drv, struct hpsb_protocol_driver, driver);
- id = driver->id_table;
- if (!id)
- return 0;
-
- for (; id->match_flags != 0; id++) {
- if ((id->match_flags & IEEE1394_MATCH_VENDOR_ID) &&
- id->vendor_id != ud->vendor_id)
- continue;
-
- if ((id->match_flags & IEEE1394_MATCH_MODEL_ID) &&
- id->model_id != ud->model_id)
- continue;
-
- if ((id->match_flags & IEEE1394_MATCH_SPECIFIER_ID) &&
- id->specifier_id != ud->specifier_id)
- continue;
-
- if ((id->match_flags & IEEE1394_MATCH_VERSION) &&
- id->version != ud->version)
- continue;
-
- return 1;
- }
-
- return 0;
-}
-
-
-static DEFINE_MUTEX(nodemgr_serialize_remove_uds);
-
-static int match_ne(struct device *dev, void *data)
-{
- struct unit_directory *ud;
- struct node_entry *ne = data;
-
- ud = container_of(dev, struct unit_directory, unit_dev);
- return ud->ne == ne;
-}
-
-static void nodemgr_remove_uds(struct node_entry *ne)
-{
- struct device *dev;
- struct unit_directory *ud;
-
- /* Use class_find device to iterate the devices. Since this code
- * may be called from other contexts besides the knodemgrds,
- * protect it by nodemgr_serialize_remove_uds.
- */
- mutex_lock(&nodemgr_serialize_remove_uds);
- for (;;) {
- dev = class_find_device(&nodemgr_ud_class, NULL, ne, match_ne);
- if (!dev)
- break;
- ud = container_of(dev, struct unit_directory, unit_dev);
- put_device(dev);
- device_unregister(&ud->unit_dev);
- device_unregister(&ud->device);
- }
- mutex_unlock(&nodemgr_serialize_remove_uds);
-}
-
-
-static void nodemgr_remove_ne(struct node_entry *ne)
-{
- struct device *dev;
-
- dev = get_device(&ne->device);
- if (!dev)
- return;
-
- HPSB_DEBUG("Node removed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
- NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
- nodemgr_remove_uds(ne);
-
- device_unregister(&ne->node_dev);
- device_unregister(dev);
-
- put_device(dev);
-}
-
-static int remove_host_dev(struct device *dev, void *data)
-{
- if (dev->bus == &ieee1394_bus_type)
- nodemgr_remove_ne(container_of(dev, struct node_entry,
- device));
- return 0;
-}
-
-static void nodemgr_remove_host_dev(struct device *dev)
-{
- device_for_each_child(dev, NULL, remove_host_dev);
- sysfs_remove_link(&dev->kobj, "irm_id");
- sysfs_remove_link(&dev->kobj, "busmgr_id");
- sysfs_remove_link(&dev->kobj, "host_id");
-}
-
-
-static void nodemgr_update_bus_options(struct node_entry *ne)
-{
-#ifdef CONFIG_IEEE1394_VERBOSEDEBUG
- static const u16 mr[] = { 4, 64, 1024, 0};
-#endif
- quadlet_t busoptions = be32_to_cpu(ne->csr->bus_info_data[2]);
-
- ne->busopt.irmc = (busoptions >> 31) & 1;
- ne->busopt.cmc = (busoptions >> 30) & 1;
- ne->busopt.isc = (busoptions >> 29) & 1;
- ne->busopt.bmc = (busoptions >> 28) & 1;
- ne->busopt.pmc = (busoptions >> 27) & 1;
- ne->busopt.cyc_clk_acc = (busoptions >> 16) & 0xff;
- ne->busopt.max_rec = 1 << (((busoptions >> 12) & 0xf) + 1);
- ne->busopt.max_rom = (busoptions >> 8) & 0x3;
- ne->busopt.generation = (busoptions >> 4) & 0xf;
- ne->busopt.lnkspd = busoptions & 0x7;
-
- HPSB_VERBOSE("NodeMgr: raw=0x%08x irmc=%d cmc=%d isc=%d bmc=%d pmc=%d "
- "cyc_clk_acc=%d max_rec=%d max_rom=%d gen=%d lspd=%d",
- busoptions, ne->busopt.irmc, ne->busopt.cmc,
- ne->busopt.isc, ne->busopt.bmc, ne->busopt.pmc,
- ne->busopt.cyc_clk_acc, ne->busopt.max_rec,
- mr[ne->busopt.max_rom],
- ne->busopt.generation, ne->busopt.lnkspd);
-}
-
-
-static struct node_entry *nodemgr_create_node(octlet_t guid,
- struct csr1212_csr *csr, struct hpsb_host *host,
- nodeid_t nodeid, unsigned int generation)
-{
- struct node_entry *ne;
-
- ne = kzalloc(sizeof(*ne), GFP_KERNEL);
- if (!ne)
- goto fail_alloc;
-
- ne->host = host;
- ne->nodeid = nodeid;
- ne->generation = generation;
- ne->needs_probe = true;
-
- ne->guid = guid;
- ne->guid_vendor_id = (guid >> 40) & 0xffffff;
- ne->csr = csr;
-
- memcpy(&ne->device, &nodemgr_dev_template_ne,
- sizeof(ne->device));
- ne->device.parent = &host->device;
- dev_set_name(&ne->device, "%016Lx", (unsigned long long)(ne->guid));
-
- ne->node_dev.parent = &ne->device;
- ne->node_dev.class = &nodemgr_ne_class;
- dev_set_name(&ne->node_dev, "%016Lx", (unsigned long long)(ne->guid));
-
- if (device_register(&ne->device))
- goto fail_devreg;
- if (device_register(&ne->node_dev))
- goto fail_classdevreg;
- get_device(&ne->device);
-
- nodemgr_create_ne_dev_files(ne);
-
- nodemgr_update_bus_options(ne);
-
- HPSB_DEBUG("%s added: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
- (host->node_id == nodeid) ? "Host" : "Node",
- NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
-
- return ne;
-
-fail_classdevreg:
- device_unregister(&ne->device);
-fail_devreg:
- kfree(ne);
-fail_alloc:
- HPSB_ERR("Failed to create node ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
- NODE_BUS_ARGS(host, nodeid), (unsigned long long)guid);
-
- return NULL;
-}
-
-static int match_ne_guid(struct device *dev, void *data)
-{
- struct node_entry *ne;
- u64 *guid = data;
-
- ne = container_of(dev, struct node_entry, node_dev);
- return ne->guid == *guid;
-}
-
-static struct node_entry *find_entry_by_guid(u64 guid)
-{
- struct device *dev;
- struct node_entry *ne;
-
- dev = class_find_device(&nodemgr_ne_class, NULL, &guid, match_ne_guid);
- if (!dev)
- return NULL;
- ne = container_of(dev, struct node_entry, node_dev);
- put_device(dev);
-
- return ne;
-}
-
-struct match_nodeid_parameter {
- struct hpsb_host *host;
- nodeid_t nodeid;
-};
-
-static int match_ne_nodeid(struct device *dev, void *data)
-{
- int found = 0;
- struct node_entry *ne;
- struct match_nodeid_parameter *p = data;
-
- if (!dev)
- goto ret;
- ne = container_of(dev, struct node_entry, node_dev);
- if (ne->host == p->host && ne->nodeid == p->nodeid)
- found = 1;
-ret:
- return found;
-}
-
-static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host,
- nodeid_t nodeid)
-{
- struct device *dev;
- struct node_entry *ne;
- struct match_nodeid_parameter p;
-
- p.host = host;
- p.nodeid = nodeid;
-
- dev = class_find_device(&nodemgr_ne_class, NULL, &p, match_ne_nodeid);
- if (!dev)
- return NULL;
- ne = container_of(dev, struct node_entry, node_dev);
- put_device(dev);
-
- return ne;
-}
-
-
-static void nodemgr_register_device(struct node_entry *ne,
- struct unit_directory *ud, struct device *parent)
-{
- memcpy(&ud->device, &nodemgr_dev_template_ud,
- sizeof(ud->device));
-
- ud->device.parent = parent;
-
- dev_set_name(&ud->device, "%s-%u", dev_name(&ne->device), ud->id);
-
- ud->unit_dev.parent = &ud->device;
- ud->unit_dev.class = &nodemgr_ud_class;
- dev_set_name(&ud->unit_dev, "%s-%u", dev_name(&ne->device), ud->id);
-
- if (device_register(&ud->device))
- goto fail_devreg;
- if (device_register(&ud->unit_dev))
- goto fail_classdevreg;
- get_device(&ud->device);
-
- nodemgr_create_ud_dev_files(ud);
-
- return;
-
-fail_classdevreg:
- device_unregister(&ud->device);
-fail_devreg:
- HPSB_ERR("Failed to create unit %s", dev_name(&ud->device));
-}
-
-
-/* This implementation currently only scans the config rom and its
- * immediate unit directories looking for software_id and
- * software_version entries, in order to get driver autoloading working. */
-static struct unit_directory *nodemgr_process_unit_directory
- (struct node_entry *ne, struct csr1212_keyval *ud_kv,
- unsigned int *id, struct unit_directory *parent)
-{
- struct unit_directory *ud;
- struct unit_directory *ud_child = NULL;
- struct csr1212_dentry *dentry;
- struct csr1212_keyval *kv;
- u8 last_key_id = 0;
-
- ud = kzalloc(sizeof(*ud), GFP_KERNEL);
- if (!ud)
- goto unit_directory_error;
-
- ud->ne = ne;
- ud->ignore_driver = ignore_drivers;
- ud->address = ud_kv->offset + CSR1212_REGISTER_SPACE_BASE;
- ud->directory_id = ud->address & 0xffffff;
- ud->ud_kv = ud_kv;
- ud->id = (*id)++;
-
- /* inherit vendor_id from root directory if none exists in unit dir */
- ud->vendor_id = ne->vendor_id;
-
- csr1212_for_each_dir_entry(ne->csr, kv, ud_kv, dentry) {
- switch (kv->key.id) {
- case CSR1212_KV_ID_VENDOR:
- if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
- ud->vendor_id = kv->value.immediate;
- ud->flags |= UNIT_DIRECTORY_VENDOR_ID;
- }
- break;
-
- case CSR1212_KV_ID_MODEL:
- ud->model_id = kv->value.immediate;
- ud->flags |= UNIT_DIRECTORY_MODEL_ID;
- break;
-
- case CSR1212_KV_ID_SPECIFIER_ID:
- ud->specifier_id = kv->value.immediate;
- ud->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
- break;
-
- case CSR1212_KV_ID_VERSION:
- ud->version = kv->value.immediate;
- ud->flags |= UNIT_DIRECTORY_VERSION;
- break;
-
- case CSR1212_KV_ID_DESCRIPTOR:
- if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
- CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
- CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
- CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
- CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
- CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
- switch (last_key_id) {
- case CSR1212_KV_ID_VENDOR:
- csr1212_keep_keyval(kv);
- ud->vendor_name_kv = kv;
- break;
-
- case CSR1212_KV_ID_MODEL:
- csr1212_keep_keyval(kv);
- ud->model_name_kv = kv;
- break;
-
- }
- } /* else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) ... */
- break;
-
- case CSR1212_KV_ID_DEPENDENT_INFO:
- /* Logical Unit Number */
- if (kv->key.type == CSR1212_KV_TYPE_IMMEDIATE) {
- if (ud->flags & UNIT_DIRECTORY_HAS_LUN) {
- ud_child = kmemdup(ud, sizeof(*ud_child), GFP_KERNEL);
- if (!ud_child)
- goto unit_directory_error;
- nodemgr_register_device(ne, ud_child, &ne->device);
- ud_child = NULL;
-
- ud->id = (*id)++;
- }
- ud->lun = kv->value.immediate;
- ud->flags |= UNIT_DIRECTORY_HAS_LUN;
-
- /* Logical Unit Directory */
- } else if (kv->key.type == CSR1212_KV_TYPE_DIRECTORY) {
- /* This should really be done in SBP2 as this is
- * doing SBP2 specific parsing.
- */
-
- /* first register the parent unit */
- ud->flags |= UNIT_DIRECTORY_HAS_LUN_DIRECTORY;
- if (ud->device.bus != &ieee1394_bus_type)
- nodemgr_register_device(ne, ud, &ne->device);
-
- /* process the child unit */
- ud_child = nodemgr_process_unit_directory(ne, kv, id, ud);
-
- if (ud_child == NULL)
- break;
-
- /* inherit unspecified values, the driver core picks it up */
- if ((ud->flags & UNIT_DIRECTORY_MODEL_ID) &&
- !(ud_child->flags & UNIT_DIRECTORY_MODEL_ID))
- {
- ud_child->flags |= UNIT_DIRECTORY_MODEL_ID;
- ud_child->model_id = ud->model_id;
- }
- if ((ud->flags & UNIT_DIRECTORY_SPECIFIER_ID) &&
- !(ud_child->flags & UNIT_DIRECTORY_SPECIFIER_ID))
- {
- ud_child->flags |= UNIT_DIRECTORY_SPECIFIER_ID;
- ud_child->specifier_id = ud->specifier_id;
- }
- if ((ud->flags & UNIT_DIRECTORY_VERSION) &&
- !(ud_child->flags & UNIT_DIRECTORY_VERSION))
- {
- ud_child->flags |= UNIT_DIRECTORY_VERSION;
- ud_child->version = ud->version;
- }
-
- /* register the child unit */
- ud_child->flags |= UNIT_DIRECTORY_LUN_DIRECTORY;
- nodemgr_register_device(ne, ud_child, &ud->device);
- }
-
- break;
-
- case CSR1212_KV_ID_DIRECTORY_ID:
- ud->directory_id = kv->value.immediate;
- break;
-
- default:
- break;
- }
- last_key_id = kv->key.id;
- }
-
- /* do not process child units here and only if not already registered */
- if (!parent && ud->device.bus != &ieee1394_bus_type)
- nodemgr_register_device(ne, ud, &ne->device);
-
- return ud;
-
-unit_directory_error:
- kfree(ud);
- return NULL;
-}
-
-
-static void nodemgr_process_root_directory(struct node_entry *ne)
-{
- unsigned int ud_id = 0;
- struct csr1212_dentry *dentry;
- struct csr1212_keyval *kv, *vendor_name_kv = NULL;
- u8 last_key_id = 0;
-
- ne->needs_probe = false;
-
- csr1212_for_each_dir_entry(ne->csr, kv, ne->csr->root_kv, dentry) {
- switch (kv->key.id) {
- case CSR1212_KV_ID_VENDOR:
- ne->vendor_id = kv->value.immediate;
- break;
-
- case CSR1212_KV_ID_NODE_CAPABILITIES:
- ne->capabilities = kv->value.immediate;
- break;
-
- case CSR1212_KV_ID_UNIT:
- nodemgr_process_unit_directory(ne, kv, &ud_id, NULL);
- break;
-
- case CSR1212_KV_ID_DESCRIPTOR:
- if (last_key_id == CSR1212_KV_ID_VENDOR) {
- if (kv->key.type == CSR1212_KV_TYPE_LEAF &&
- CSR1212_DESCRIPTOR_LEAF_TYPE(kv) == 0 &&
- CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) == 0 &&
- CSR1212_TEXTUAL_DESCRIPTOR_LEAF_WIDTH(kv) == 0 &&
- CSR1212_TEXTUAL_DESCRIPTOR_LEAF_CHAR_SET(kv) == 0 &&
- CSR1212_TEXTUAL_DESCRIPTOR_LEAF_LANGUAGE(kv) == 0) {
- csr1212_keep_keyval(kv);
- vendor_name_kv = kv;
- }
- }
- break;
- }
- last_key_id = kv->key.id;
- }
-
- if (ne->vendor_name_kv) {
- kv = ne->vendor_name_kv;
- ne->vendor_name_kv = vendor_name_kv;
- csr1212_release_keyval(kv);
- } else if (vendor_name_kv) {
- ne->vendor_name_kv = vendor_name_kv;
- if (device_create_file(&ne->device,
- &dev_attr_ne_vendor_name_kv) != 0)
- HPSB_ERR("Failed to add sysfs attribute");
- }
-}
-
-#ifdef CONFIG_HOTPLUG
-
-static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
-{
- struct unit_directory *ud;
- int retval = 0;
- /* ieee1394:venNmoNspNverN */
- char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
-
- if (!dev)
- return -ENODEV;
-
- ud = container_of(dev, struct unit_directory, unit_dev);
-
- if (ud->ne->in_limbo || ud->ignore_driver)
- return -ENODEV;
-
-#define PUT_ENVP(fmt,val) \
-do { \
- retval = add_uevent_var(env, fmt, val); \
- if (retval) \
- return retval; \
-} while (0)
-
- PUT_ENVP("VENDOR_ID=%06x", ud->vendor_id);
- PUT_ENVP("MODEL_ID=%06x", ud->model_id);
- PUT_ENVP("GUID=%016Lx", (unsigned long long)ud->ne->guid);
- PUT_ENVP("SPECIFIER_ID=%06x", ud->specifier_id);
- PUT_ENVP("VERSION=%06x", ud->version);
- snprintf(buf, sizeof(buf), "ieee1394:ven%08Xmo%08Xsp%08Xver%08X",
- ud->vendor_id,
- ud->model_id,
- ud->specifier_id,
- ud->version);
- PUT_ENVP("MODALIAS=%s", buf);
-
-#undef PUT_ENVP
-
- return 0;
-}
-
-#else
-
-static int nodemgr_uevent(struct device *dev, struct kobj_uevent_env *env)
-{
- return -ENODEV;
-}
-
-#endif /* CONFIG_HOTPLUG */
-
-
-int __hpsb_register_protocol(struct hpsb_protocol_driver *drv,
- struct module *owner)
-{
- int error;
-
- drv->driver.bus = &ieee1394_bus_type;
- drv->driver.owner = owner;
- drv->driver.name = drv->name;
-
- /* This will cause a probe for devices */
- error = driver_register(&drv->driver);
- if (!error)
- nodemgr_create_drv_files(drv);
- return error;
-}
-
-void hpsb_unregister_protocol(struct hpsb_protocol_driver *driver)
-{
- nodemgr_remove_drv_files(driver);
- /* This will subsequently disconnect all devices that our driver
- * is attached to. */
- driver_unregister(&driver->driver);
-}
-
-
-/*
- * This function updates nodes that were present on the bus before the
- * reset and still are after the reset. The nodeid and the config rom
- * may have changed, and the drivers managing this device must be
- * informed that this device just went through a bus reset, to allow
- * the to take whatever actions required.
- */
-static void nodemgr_update_node(struct node_entry *ne, struct csr1212_csr *csr,
- nodeid_t nodeid, unsigned int generation)
-{
- if (ne->nodeid != nodeid) {
- HPSB_DEBUG("Node changed: " NODE_BUS_FMT " -> " NODE_BUS_FMT,
- NODE_BUS_ARGS(ne->host, ne->nodeid),
- NODE_BUS_ARGS(ne->host, nodeid));
- ne->nodeid = nodeid;
- }
-
- if (ne->busopt.generation != ((be32_to_cpu(csr->bus_info_data[2]) >> 4) & 0xf)) {
- kfree(ne->csr->private);
- csr1212_destroy_csr(ne->csr);
- ne->csr = csr;
-
- /* If the node's configrom generation has changed, we
- * unregister all the unit directories. */
- nodemgr_remove_uds(ne);
-
- nodemgr_update_bus_options(ne);
-
- /* Mark the node as new, so it gets re-probed */
- ne->needs_probe = true;
- } else {
- /* old cache is valid, so update its generation */
- struct nodemgr_csr_info *ci = ne->csr->private;
- ci->generation = generation;
- /* free the partially filled now unneeded new cache */
- kfree(csr->private);
- csr1212_destroy_csr(csr);
- }
-
- /* Finally, mark the node current */
- smp_wmb();
- ne->generation = generation;
-
- if (ne->in_limbo) {
- device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
- ne->in_limbo = false;
-
- HPSB_DEBUG("Node reactivated: "
- "ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
- NODE_BUS_ARGS(ne->host, ne->nodeid),
- (unsigned long long)ne->guid);
- }
-}
-
-static void nodemgr_node_scan_one(struct hpsb_host *host,
- nodeid_t nodeid, int generation)
-{
- struct node_entry *ne;
- octlet_t guid;
- struct csr1212_csr *csr;
- struct nodemgr_csr_info *ci;
- u8 *speed;
-
- ci = kmalloc(sizeof(*ci), GFP_KERNEL);
- kmemcheck_annotate_bitfield(ci, flags);
- if (!ci)
- return;
-
- ci->host = host;
- ci->nodeid = nodeid;
- ci->generation = generation;
-
- /* Prepare for speed probe which occurs when reading the ROM */
- speed = &(host->speed[NODEID_TO_NODE(nodeid)]);
- if (*speed > host->csr.lnk_spd)
- *speed = host->csr.lnk_spd;
- ci->speed_unverified = *speed > IEEE1394_SPEED_100;
-
- /* We need to detect when the ConfigROM's generation has changed,
- * so we only update the node's info when it needs to be. */
-
- csr = csr1212_create_csr(&nodemgr_csr_ops, 5 * sizeof(quadlet_t), ci);
- if (!csr || csr1212_parse_csr(csr) != CSR1212_SUCCESS) {
- HPSB_ERR("Error parsing configrom for node " NODE_BUS_FMT,
- NODE_BUS_ARGS(host, nodeid));
- if (csr)
- csr1212_destroy_csr(csr);
- kfree(ci);
- return;
- }
-
- if (csr->bus_info_data[1] != IEEE1394_BUSID_MAGIC) {
- /* This isn't a 1394 device, but we let it slide. There
- * was a report of a device with broken firmware which
- * reported '2394' instead of '1394', which is obviously a
- * mistake. One would hope that a non-1394 device never
- * gets connected to Firewire bus. If someone does, we
- * shouldn't be held responsible, so we'll allow it with a
- * warning. */
- HPSB_WARN("Node " NODE_BUS_FMT " has invalid busID magic [0x%08x]",
- NODE_BUS_ARGS(host, nodeid), csr->bus_info_data[1]);
- }
-
- guid = ((u64)be32_to_cpu(csr->bus_info_data[3]) << 32) | be32_to_cpu(csr->bus_info_data[4]);
- ne = find_entry_by_guid(guid);
-
- if (ne && ne->host != host && ne->in_limbo) {
- /* Must have moved this device from one host to another */
- nodemgr_remove_ne(ne);
- ne = NULL;
- }
-
- if (!ne)
- nodemgr_create_node(guid, csr, host, nodeid, generation);
- else
- nodemgr_update_node(ne, csr, nodeid, generation);
-}
-
-
-static void nodemgr_node_scan(struct hpsb_host *host, int generation)
-{
- int count;
- struct selfid *sid = (struct selfid *)host->topology_map;
- nodeid_t nodeid = LOCAL_BUS;
-
- /* Scan each node on the bus */
- for (count = host->selfid_count; count; count--, sid++) {
- if (sid->extended)
- continue;
-
- if (!sid->link_active) {
- nodeid++;
- continue;
- }
- nodemgr_node_scan_one(host, nodeid++, generation);
- }
-}
-
-static void nodemgr_pause_ne(struct node_entry *ne)
-{
- HPSB_DEBUG("Node paused: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
- NODE_BUS_ARGS(ne->host, ne->nodeid),
- (unsigned long long)ne->guid);
-
- ne->in_limbo = true;
- WARN_ON(device_create_file(&ne->device, &dev_attr_ne_in_limbo));
-}
-
-static int update_pdrv(struct device *dev, void *data)
-{
- struct unit_directory *ud;
- struct device_driver *drv;
- struct hpsb_protocol_driver *pdrv;
- struct node_entry *ne = data;
- int error;
-
- ud = container_of(dev, struct unit_directory, unit_dev);
- if (ud->ne == ne) {
- drv = get_driver(ud->device.driver);
- if (drv) {
- error = 0;
- pdrv = container_of(drv, struct hpsb_protocol_driver,
- driver);
- if (pdrv->update) {
- device_lock(&ud->device);
- error = pdrv->update(ud);
- device_unlock(&ud->device);
- }
- if (error)
- device_release_driver(&ud->device);
- put_driver(drv);
- }
- }
-
- return 0;
-}
-
-static void nodemgr_update_pdrv(struct node_entry *ne)
-{
- class_for_each_device(&nodemgr_ud_class, NULL, ne, update_pdrv);
-}
-
-/* Write the BROADCAST_CHANNEL as per IEEE1394a 8.3.2.3.11 and 8.4.2.3. This
- * seems like an optional service but in the end it is practically mandatory
- * as a consequence of these clauses.
- *
- * Note that we cannot do a broadcast write to all nodes at once because some
- * pre-1394a devices would hang. */
-static void nodemgr_irm_write_bc(struct node_entry *ne, int generation)
-{
- const u64 bc_addr = (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL);
- quadlet_t bc_remote, bc_local;
- int error;
-
- if (!ne->host->is_irm || ne->generation != generation ||
- ne->nodeid == ne->host->node_id)
- return;
-
- bc_local = cpu_to_be32(ne->host->csr.broadcast_channel);
-
- /* Check if the register is implemented and 1394a compliant. */
- error = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
- sizeof(bc_remote));
- if (!error && bc_remote & cpu_to_be32(0x80000000) &&
- bc_remote != bc_local)
- hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
-}
-
-
-static void nodemgr_probe_ne(struct hpsb_host *host, struct node_entry *ne,
- int generation)
-{
- struct device *dev;
-
- if (ne->host != host || ne->in_limbo)
- return;
-
- dev = get_device(&ne->device);
- if (!dev)
- return;
-
- nodemgr_irm_write_bc(ne, generation);
-
- /* If "needs_probe", then this is either a new or changed node we
- * rescan totally. If the generation matches for an existing node
- * (one that existed prior to the bus reset) we send update calls
- * down to the drivers. Otherwise, this is a dead node and we
- * suspend it. */
- if (ne->needs_probe)
- nodemgr_process_root_directory(ne);
- else if (ne->generation == generation)
- nodemgr_update_pdrv(ne);
- else
- nodemgr_pause_ne(ne);
-
- put_device(dev);
-}
-
-struct node_probe_parameter {
- struct hpsb_host *host;
- int generation;
- bool probe_now;
-};
-
-static int node_probe(struct device *dev, void *data)
-{
- struct node_probe_parameter *p = data;
- struct node_entry *ne;
-
- if (p->generation != get_hpsb_generation(p->host))
- return -EAGAIN;
-
- ne = container_of(dev, struct node_entry, node_dev);
- if (ne->needs_probe == p->probe_now)
- nodemgr_probe_ne(p->host, ne, p->generation);
- return 0;
-}
-
-static int nodemgr_node_probe(struct hpsb_host *host, int generation)
-{
- struct node_probe_parameter p;
-
- p.host = host;
- p.generation = generation;
- /*
- * Do some processing of the nodes we've probed. This pulls them
- * into the sysfs layer if needed, and can result in processing of
- * unit-directories, or just updating the node and it's
- * unit-directories.
- *
- * Run updates before probes. Usually, updates are time-critical
- * while probes are time-consuming.
- *
- * Meanwhile, another bus reset may have happened. In this case we
- * skip everything here and let the next bus scan handle it.
- * Otherwise we may prematurely remove nodes which are still there.
- */
- p.probe_now = false;
- if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
- return 0;
-
- p.probe_now = true;
- if (class_for_each_device(&nodemgr_ne_class, NULL, &p, node_probe) != 0)
- return 0;
- /*
- * Now let's tell the bus to rescan our devices. This may seem
- * like overhead, but the driver-model core will only scan a
- * device for a driver when either the device is added, or when a
- * new driver is added. A bus reset is a good reason to rescan
- * devices that were there before. For example, an sbp2 device
- * may become available for login, if the host that held it was
- * just removed.
- */
- if (bus_rescan_devices(&ieee1394_bus_type) != 0)
- HPSB_DEBUG("bus_rescan_devices had an error");
-
- return 1;
-}
-
-static int remove_nodes_in_limbo(struct device *dev, void *data)
-{
- struct node_entry *ne;
-
- if (dev->bus != &ieee1394_bus_type)
- return 0;
-
- ne = container_of(dev, struct node_entry, device);
- if (ne->in_limbo)
- nodemgr_remove_ne(ne);
-
- return 0;
-}
-
-static void nodemgr_remove_nodes_in_limbo(struct hpsb_host *host)
-{
- device_for_each_child(&host->device, NULL, remove_nodes_in_limbo);
-}
-
-static int nodemgr_send_resume_packet(struct hpsb_host *host)
-{
- struct hpsb_packet *packet;
- int error = -ENOMEM;
-
- packet = hpsb_make_phypacket(host,
- EXTPHYPACKET_TYPE_RESUME |
- NODEID_TO_NODE(host->node_id) << PHYPACKET_PORT_SHIFT);
- if (packet) {
- packet->no_waiter = 1;
- packet->generation = get_hpsb_generation(host);
- error = hpsb_send_packet(packet);
- }
- if (error)
- HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
- host->id);
- return error;
-}
-
-/* Perform a few high-level IRM responsibilities. */
-static int nodemgr_do_irm_duties(struct hpsb_host *host, int cycles)
-{
- quadlet_t bc;
-
- /* if irm_id == -1 then there is no IRM on this bus */
- if (!host->is_irm || host->irm_id == (nodeid_t)-1)
- return 1;
-
- /* We are a 1394a-2000 compliant IRM. Set the validity bit. */
- host->csr.broadcast_channel |= 0x40000000;
-
- /* If there is no bus manager then we should set the root node's
- * force_root bit to promote bus stability per the 1394
- * spec. (8.4.2.6) */
- if (host->busmgr_id == 0xffff && host->node_count > 1)
- {
- u16 root_node = host->node_count - 1;
-
- /* get cycle master capability flag from root node */
- if (host->is_cycmst ||
- (!hpsb_read(host, LOCAL_BUS | root_node, get_hpsb_generation(host),
- (CSR_REGISTER_BASE + CSR_CONFIG_ROM + 2 * sizeof(quadlet_t)),
- &bc, sizeof(quadlet_t)) &&
- be32_to_cpu(bc) & 1 << CSR_CMC_SHIFT))
- hpsb_send_phy_config(host, root_node, -1);
- else {
- HPSB_DEBUG("The root node is not cycle master capable; "
- "selecting a new root node and resetting...");
-
- if (cycles >= 5) {
- /* Oh screw it! Just leave the bus as it is */
- HPSB_DEBUG("Stopping reset loop for IRM sanity");
- return 1;
- }
-
- hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
- hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
-
- return 0;
- }
- }
-
- /* Some devices suspend their ports while being connected to an inactive
- * host adapter, i.e. if connected before the low-level driver is
- * loaded. They become visible either when physically unplugged and
- * replugged, or when receiving a resume packet. Send one once. */
- if (!host->resume_packet_sent && !nodemgr_send_resume_packet(host))
- host->resume_packet_sent = 1;
-
- return 1;
-}
-
-/* We need to ensure that if we are not the IRM, that the IRM node is capable of
- * everything we can do, otherwise issue a bus reset and try to become the IRM
- * ourselves. */
-static int nodemgr_check_irm_capability(struct hpsb_host *host, int cycles)
-{
- quadlet_t bc;
- int status;
-
- if (hpsb_disable_irm || host->is_irm)
- return 1;
-
- status = hpsb_read(host, LOCAL_BUS | (host->irm_id),
- get_hpsb_generation(host),
- (CSR_REGISTER_BASE | CSR_BROADCAST_CHANNEL),
- &bc, sizeof(quadlet_t));
-
- if (status < 0 || !(be32_to_cpu(bc) & 0x80000000)) {
- /* The current irm node does not have a valid BROADCAST_CHANNEL
- * register and we do, so reset the bus with force_root set */
- HPSB_DEBUG("Current remote IRM is not 1394a-2000 compliant, resetting...");
-
- if (cycles >= 5) {
- /* Oh screw it! Just leave the bus as it is */
- HPSB_DEBUG("Stopping reset loop for IRM sanity");
- return 1;
- }
-
- hpsb_send_phy_config(host, NODEID_TO_NODE(host->node_id), -1);
- hpsb_reset_bus(host, LONG_RESET_FORCE_ROOT);
-
- return 0;
- }
-
- return 1;
-}
-
-static int nodemgr_host_thread(void *data)
-{
- struct hpsb_host *host = data;
- unsigned int g, generation = 0;
- int i, reset_cycles = 0;
-
- set_freezable();
- /* Setup our device-model entries */
- nodemgr_create_host_dev_files(host);
-
- for (;;) {
- /* Sleep until next bus reset */
- set_current_state(TASK_INTERRUPTIBLE);
- if (get_hpsb_generation(host) == generation &&
- !kthread_should_stop())
- schedule();
- __set_current_state(TASK_RUNNING);
-
- /* Thread may have been woken up to freeze or to exit */
- if (try_to_freeze())
- continue;
- if (kthread_should_stop())
- goto exit;
-
- /* Pause for 1/4 second in 1/16 second intervals,
- * to make sure things settle down. */
- g = get_hpsb_generation(host);
- for (i = 0; i < 4 ; i++) {
- msleep_interruptible(63);
- try_to_freeze();
- if (kthread_should_stop())
- goto exit;
-
- /* Now get the generation in which the node ID's we collect
- * are valid. During the bus scan we will use this generation
- * for the read transactions, so that if another reset occurs
- * during the scan the transactions will fail instead of
- * returning bogus data. */
- generation = get_hpsb_generation(host);
-
- /* If we get a reset before we are done waiting, then
- * start the waiting over again */
- if (generation != g)
- g = generation, i = 0;
- }
-
- if (!nodemgr_check_irm_capability(host, reset_cycles) ||
- !nodemgr_do_irm_duties(host, reset_cycles)) {
- reset_cycles++;
- continue;
- }
- reset_cycles = 0;
-
- /* Scan our nodes to get the bus options and create node
- * entries. This does not do the sysfs stuff, since that
- * would trigger uevents and such, which is a bad idea at
- * this point. */
- nodemgr_node_scan(host, generation);
-
- /* This actually does the full probe, with sysfs
- * registration. */
- if (!nodemgr_node_probe(host, generation))
- continue;
-
- /* Update some of our sysfs symlinks */
- nodemgr_update_host_dev_links(host);
-
- /* Sleep 3 seconds */
- for (i = 3000/200; i; i--) {
- msleep_interruptible(200);
- try_to_freeze();
- if (kthread_should_stop())
- goto exit;
-
- if (generation != get_hpsb_generation(host))
- break;
- }
- /* Remove nodes which are gone, unless a bus reset happened */
- if (!i)
- nodemgr_remove_nodes_in_limbo(host);
- }
-exit:
- HPSB_VERBOSE("NodeMgr: Exiting thread");
- return 0;
-}
-
-struct per_host_parameter {
- void *data;
- int (*cb)(struct hpsb_host *, void *);
-};
-
-static int per_host(struct device *dev, void *data)
-{
- struct hpsb_host *host;
- struct per_host_parameter *p = data;
-
- host = container_of(dev, struct hpsb_host, host_dev);
- return p->cb(host, p->data);
-}
-
-/**
- * nodemgr_for_each_host - call a function for each IEEE 1394 host
- * @data: an address to supply to the callback
- * @cb: function to call for each host
- *
- * Iterate the hosts, calling a given function with supplied data for each host.
- * If the callback fails on a host, i.e. if it returns a non-zero value, the
- * iteration is stopped.
- *
- * Return value: 0 on success, non-zero on failure (same as returned by last run
- * of the callback).
- */
-int nodemgr_for_each_host(void *data, int (*cb)(struct hpsb_host *, void *))
-{
- struct per_host_parameter p;
-
- p.cb = cb;
- p.data = data;
- return class_for_each_device(&hpsb_host_class, NULL, &p, per_host);
-}
-
-/* The following two convenience functions use a struct node_entry
- * for addressing a node on the bus. They are intended for use by any
- * process context, not just the nodemgr thread, so we need to be a
- * little careful when reading out the node ID and generation. The
- * thing that can go wrong is that we get the node ID, then a bus
- * reset occurs, and then we read the generation. The node ID is
- * possibly invalid, but the generation is current, and we end up
- * sending a packet to a the wrong node.
- *
- * The solution is to make sure we read the generation first, so that
- * if a reset occurs in the process, we end up with a stale generation
- * and the transactions will fail instead of silently using wrong node
- * ID's.
- */
-
-/**
- * hpsb_node_fill_packet - fill some destination information into a packet
- * @ne: destination node
- * @packet: packet to fill in
- *
- * This will fill in the given, pre-initialised hpsb_packet with the current
- * information from the node entry (host, node ID, bus generation number).
- */
-void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *packet)
-{
- packet->host = ne->host;
- packet->generation = ne->generation;
- smp_rmb();
- packet->node_id = ne->nodeid;
-}
-
-int hpsb_node_write(struct node_entry *ne, u64 addr,
- quadlet_t *buffer, size_t length)
-{
- unsigned int generation = ne->generation;
-
- smp_rmb();
- return hpsb_write(ne->host, ne->nodeid, generation,
- addr, buffer, length);
-}
-
-static void nodemgr_add_host(struct hpsb_host *host)
-{
- struct host_info *hi;
-
- hi = hpsb_create_hostinfo(&nodemgr_highlevel, host, sizeof(*hi));
- if (!hi) {
- HPSB_ERR("NodeMgr: out of memory in add host");
- return;
- }
- hi->host = host;
- hi->thread = kthread_run(nodemgr_host_thread, host, "knodemgrd_%d",
- host->id);
- if (IS_ERR(hi->thread)) {
- HPSB_ERR("NodeMgr: cannot start thread for host %d", host->id);
- hpsb_destroy_hostinfo(&nodemgr_highlevel, host);
- }
-}
-
-static void nodemgr_host_reset(struct hpsb_host *host)
-{
- struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
-
- if (hi) {
- HPSB_VERBOSE("NodeMgr: Processing reset for host %d", host->id);
- wake_up_process(hi->thread);
- }
-}
-
-static void nodemgr_remove_host(struct hpsb_host *host)
-{
- struct host_info *hi = hpsb_get_hostinfo(&nodemgr_highlevel, host);
-
- if (hi) {
- kthread_stop(hi->thread);
- nodemgr_remove_host_dev(&host->device);
- }
-}
-
-static struct hpsb_highlevel nodemgr_highlevel = {
- .name = "Node manager",
- .add_host = nodemgr_add_host,
- .host_reset = nodemgr_host_reset,
- .remove_host = nodemgr_remove_host,
-};
-
-int init_ieee1394_nodemgr(void)
-{
- int error;
-
- error = class_register(&nodemgr_ne_class);
- if (error)
- goto fail_ne;
- error = class_register(&nodemgr_ud_class);
- if (error)
- goto fail_ud;
- error = driver_register(&nodemgr_mid_layer_driver);
- if (error)
- goto fail_ml;
- /* This driver is not used if nodemgr is off (disable_nodemgr=1). */
- nodemgr_dev_template_host.driver = &nodemgr_mid_layer_driver;
-
- hpsb_register_highlevel(&nodemgr_highlevel);
- return 0;
-
-fail_ml:
- class_unregister(&nodemgr_ud_class);
-fail_ud:
- class_unregister(&nodemgr_ne_class);
-fail_ne:
- return error;
-}
-
-void cleanup_ieee1394_nodemgr(void)
-{
- hpsb_unregister_highlevel(&nodemgr_highlevel);
- driver_unregister(&nodemgr_mid_layer_driver);
- class_unregister(&nodemgr_ud_class);
- class_unregister(&nodemgr_ne_class);
-}