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a1842be898
nodemgr_resume_ne was iterating over nodemgr_ud_class.children without protection by nodemgr_ud_class.subsys.rwsem. FIXME: Shouldn't we rather use class->sem there, not class->subsys.rwsem? Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
1815 lines
51 KiB
C
1815 lines
51 KiB
C
/*
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* Node information (ConfigROM) collection and management.
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*
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* Copyright (C) 2000 Andreas E. Bombe
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* 2001-2003 Ben Collins <bcollins@debian.net>
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*
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* This code is licensed under the GPL. See the file COPYING in the root
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* directory of the kernel sources for details.
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*/
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#include <linux/bitmap.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/kthread.h>
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#include <linux/moduleparam.h>
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#include <asm/atomic.h>
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#include "csr.h"
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#include "highlevel.h"
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#include "hosts.h"
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#include "ieee1394.h"
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#include "ieee1394_core.h"
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#include "ieee1394_hotplug.h"
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#include "ieee1394_types.h"
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#include "ieee1394_transactions.h"
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#include "nodemgr.h"
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static int ignore_drivers;
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module_param(ignore_drivers, int, S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(ignore_drivers, "Disable automatic probing for drivers.");
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struct nodemgr_csr_info {
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struct hpsb_host *host;
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nodeid_t nodeid;
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unsigned int generation;
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unsigned int speed_unverified:1;
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};
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static char *nodemgr_find_oui_name(int oui)
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{
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#ifdef CONFIG_IEEE1394_OUI_DB
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extern struct oui_list_struct {
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int oui;
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char *name;
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} oui_list[];
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int i;
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for (i = 0; oui_list[i].name; i++)
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if (oui_list[i].oui == oui)
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return oui_list[i].name;
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#endif
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return NULL;
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}
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/*
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* Correct the speed map entry. This is necessary
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* - for nodes with link speed < phy speed,
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* - for 1394b nodes with negotiated phy port speed < IEEE1394_SPEED_MAX.
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* A possible speed is determined by trial and error, using quadlet reads.
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*/
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static int nodemgr_check_speed(struct nodemgr_csr_info *ci, u64 addr,
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quadlet_t *buffer)
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{
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quadlet_t q;
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u8 i, *speed, old_speed, good_speed;
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int ret;
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speed = &(ci->host->speed[NODEID_TO_NODE(ci->nodeid)]);
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old_speed = *speed;
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good_speed = IEEE1394_SPEED_MAX + 1;
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/* Try every speed from S100 to old_speed.
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* If we did it the other way around, a too low speed could be caught
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* if the retry succeeded for some other reason, e.g. because the link
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* just finished its initialization. */
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for (i = IEEE1394_SPEED_100; i <= old_speed; i++) {
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*speed = i;
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ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
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&q, sizeof(quadlet_t));
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if (ret)
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break;
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*buffer = q;
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good_speed = i;
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}
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if (good_speed <= IEEE1394_SPEED_MAX) {
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HPSB_DEBUG("Speed probe of node " NODE_BUS_FMT " yields %s",
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NODE_BUS_ARGS(ci->host, ci->nodeid),
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hpsb_speedto_str[good_speed]);
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*speed = good_speed;
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ci->speed_unverified = 0;
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return 0;
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}
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*speed = old_speed;
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return ret;
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}
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static int nodemgr_bus_read(struct csr1212_csr *csr, u64 addr, u16 length,
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void *buffer, void *__ci)
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{
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struct nodemgr_csr_info *ci = (struct nodemgr_csr_info*)__ci;
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int i, ret;
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for (i = 1; ; i++) {
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ret = hpsb_read(ci->host, ci->nodeid, ci->generation, addr,
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buffer, length);
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if (!ret) {
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ci->speed_unverified = 0;
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break;
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}
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/* Give up after 3rd failure. */
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if (i == 3)
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break;
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/* The ieee1394_core guessed the node's speed capability from
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* the self ID. Check whether a lower speed works. */
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if (ci->speed_unverified && length == sizeof(quadlet_t)) {
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ret = nodemgr_check_speed(ci, addr, buffer);
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if (!ret)
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break;
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}
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if (msleep_interruptible(334))
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return -EINTR;
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}
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return ret;
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}
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static int nodemgr_get_max_rom(quadlet_t *bus_info_data, void *__ci)
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{
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return (CSR1212_BE32_TO_CPU(bus_info_data[2]) >> 8) & 0x3;
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}
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static struct csr1212_bus_ops nodemgr_csr_ops = {
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.bus_read = nodemgr_bus_read,
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.get_max_rom = nodemgr_get_max_rom
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};
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/*
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* Basically what we do here is start off retrieving the bus_info block.
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* From there will fill in some info about the node, verify it is of IEEE
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* 1394 type, and that the crc checks out ok. After that we start off with
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* the root directory, and subdirectories. To do this, we retrieve the
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* quadlet header for a directory, find out the length, and retrieve the
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* complete directory entry (be it a leaf or a directory). We then process
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* it and add the info to our structure for that particular node.
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*
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* We verify CRC's along the way for each directory/block/leaf. The entire
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* node structure is generic, and simply stores the information in a way
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* that's easy to parse by the protocol interface.
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*/
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/*
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* The nodemgr relies heavily on the Driver Model for device callbacks and
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* driver/device mappings. The old nodemgr used to handle all this itself,
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* but now we are much simpler because of the LDM.
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*/
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static DEFINE_MUTEX(nodemgr_serialize);
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struct host_info {
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struct hpsb_host *host;
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struct list_head list;
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struct task_struct *thread;
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};
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static int nodemgr_bus_match(struct device * dev, struct device_driver * drv);
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static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
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char *buffer, int buffer_size);
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static void nodemgr_resume_ne(struct node_entry *ne);
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static void nodemgr_remove_ne(struct node_entry *ne);
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static struct node_entry *find_entry_by_guid(u64 guid);
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struct bus_type ieee1394_bus_type = {
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.name = "ieee1394",
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.match = nodemgr_bus_match,
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};
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static void host_cls_release(struct class_device *class_dev)
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{
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put_device(&container_of((class_dev), struct hpsb_host, class_dev)->device);
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}
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struct class hpsb_host_class = {
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.name = "ieee1394_host",
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.release = host_cls_release,
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};
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static void ne_cls_release(struct class_device *class_dev)
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{
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put_device(&container_of((class_dev), struct node_entry, class_dev)->device);
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}
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static struct class nodemgr_ne_class = {
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.name = "ieee1394_node",
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.release = ne_cls_release,
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};
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static void ud_cls_release(struct class_device *class_dev)
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{
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put_device(&container_of((class_dev), struct unit_directory, class_dev)->device);
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}
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/* The name here is only so that unit directory hotplug works with old
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* style hotplug, which only ever did unit directories anyway. */
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static struct class nodemgr_ud_class = {
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.name = "ieee1394",
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.release = ud_cls_release,
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.uevent = nodemgr_uevent,
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};
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static struct hpsb_highlevel nodemgr_highlevel;
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static void nodemgr_release_ud(struct device *dev)
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{
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struct unit_directory *ud = container_of(dev, struct unit_directory, device);
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if (ud->vendor_name_kv)
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csr1212_release_keyval(ud->vendor_name_kv);
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if (ud->model_name_kv)
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csr1212_release_keyval(ud->model_name_kv);
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kfree(ud);
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}
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static void nodemgr_release_ne(struct device *dev)
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{
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struct node_entry *ne = container_of(dev, struct node_entry, device);
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if (ne->vendor_name_kv)
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csr1212_release_keyval(ne->vendor_name_kv);
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kfree(ne);
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}
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static void nodemgr_release_host(struct device *dev)
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{
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struct hpsb_host *host = container_of(dev, struct hpsb_host, device);
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csr1212_destroy_csr(host->csr.rom);
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kfree(host);
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}
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static int nodemgr_ud_platform_data;
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static struct device nodemgr_dev_template_ud = {
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.bus = &ieee1394_bus_type,
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.release = nodemgr_release_ud,
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.platform_data = &nodemgr_ud_platform_data,
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};
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static struct device nodemgr_dev_template_ne = {
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.bus = &ieee1394_bus_type,
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.release = nodemgr_release_ne,
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};
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struct device nodemgr_dev_template_host = {
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.bus = &ieee1394_bus_type,
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.release = nodemgr_release_host,
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};
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#define fw_attr(class, class_type, field, type, format_string) \
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static ssize_t fw_show_##class##_##field (struct device *dev, struct device_attribute *attr, char *buf)\
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{ \
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class_type *class; \
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class = container_of(dev, class_type, device); \
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return sprintf(buf, format_string, (type)class->field); \
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} \
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static struct device_attribute dev_attr_##class##_##field = { \
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.attr = {.name = __stringify(field), .mode = S_IRUGO }, \
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.show = fw_show_##class##_##field, \
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};
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#define fw_attr_td(class, class_type, td_kv) \
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static ssize_t fw_show_##class##_##td_kv (struct device *dev, struct device_attribute *attr, char *buf)\
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{ \
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int len; \
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class_type *class = container_of(dev, class_type, device); \
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len = (class->td_kv->value.leaf.len - 2) * sizeof(quadlet_t); \
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memcpy(buf, \
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CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(class->td_kv), \
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len); \
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while ((buf + len - 1) == '\0') \
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len--; \
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buf[len++] = '\n'; \
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buf[len] = '\0'; \
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return len; \
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} \
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static struct device_attribute dev_attr_##class##_##td_kv = { \
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.attr = {.name = __stringify(td_kv), .mode = S_IRUGO }, \
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.show = fw_show_##class##_##td_kv, \
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};
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#define fw_drv_attr(field, type, format_string) \
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static ssize_t fw_drv_show_##field (struct device_driver *drv, char *buf) \
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{ \
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struct hpsb_protocol_driver *driver; \
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driver = container_of(drv, struct hpsb_protocol_driver, driver); \
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return sprintf(buf, format_string, (type)driver->field);\
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} \
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static struct driver_attribute driver_attr_drv_##field = { \
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.attr = {.name = __stringify(field), .mode = S_IRUGO }, \
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.show = fw_drv_show_##field, \
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};
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static ssize_t fw_show_ne_bus_options(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct node_entry *ne = container_of(dev, struct node_entry, device);
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return sprintf(buf, "IRMC(%d) CMC(%d) ISC(%d) BMC(%d) PMC(%d) GEN(%d) "
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"LSPD(%d) MAX_REC(%d) MAX_ROM(%d) CYC_CLK_ACC(%d)\n",
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ne->busopt.irmc,
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ne->busopt.cmc, ne->busopt.isc, ne->busopt.bmc,
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ne->busopt.pmc, ne->busopt.generation, ne->busopt.lnkspd,
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ne->busopt.max_rec,
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ne->busopt.max_rom,
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ne->busopt.cyc_clk_acc);
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}
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static DEVICE_ATTR(bus_options,S_IRUGO,fw_show_ne_bus_options,NULL);
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#ifdef HPSB_DEBUG_TLABELS
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static ssize_t fw_show_ne_tlabels_free(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct node_entry *ne = container_of(dev, struct node_entry, device);
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unsigned long flags;
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unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
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int tf;
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spin_lock_irqsave(&hpsb_tlabel_lock, flags);
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tf = 64 - bitmap_weight(tp, 64);
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spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
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return sprintf(buf, "%d\n", tf);
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}
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static DEVICE_ATTR(tlabels_free,S_IRUGO,fw_show_ne_tlabels_free,NULL);
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static ssize_t fw_show_ne_tlabels_mask(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct node_entry *ne = container_of(dev, struct node_entry, device);
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unsigned long flags;
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unsigned long *tp = ne->host->tl_pool[NODEID_TO_NODE(ne->nodeid)].map;
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u64 tm;
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spin_lock_irqsave(&hpsb_tlabel_lock, flags);
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#if (BITS_PER_LONG <= 32)
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tm = ((u64)tp[0] << 32) + tp[1];
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#else
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tm = tp[0];
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#endif
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spin_unlock_irqrestore(&hpsb_tlabel_lock, flags);
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return sprintf(buf, "0x%016llx\n", tm);
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}
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static DEVICE_ATTR(tlabels_mask, S_IRUGO, fw_show_ne_tlabels_mask, NULL);
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#endif /* HPSB_DEBUG_TLABELS */
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static ssize_t fw_set_ignore_driver(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
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{
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struct unit_directory *ud = container_of(dev, struct unit_directory, device);
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int state = simple_strtoul(buf, NULL, 10);
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if (state == 1) {
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down_write(&dev->bus->subsys.rwsem);
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device_release_driver(dev);
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ud->ignore_driver = 1;
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up_write(&dev->bus->subsys.rwsem);
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} else if (!state)
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ud->ignore_driver = 0;
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return count;
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}
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static ssize_t fw_get_ignore_driver(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct unit_directory *ud = container_of(dev, struct unit_directory, device);
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return sprintf(buf, "%d\n", ud->ignore_driver);
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}
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static DEVICE_ATTR(ignore_driver, S_IWUSR | S_IRUGO, fw_get_ignore_driver, fw_set_ignore_driver);
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static ssize_t fw_set_destroy_node(struct bus_type *bus, const char *buf, size_t count)
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{
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struct node_entry *ne;
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u64 guid = (u64)simple_strtoull(buf, NULL, 16);
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ne = find_entry_by_guid(guid);
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if (ne == NULL || !ne->in_limbo)
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return -EINVAL;
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nodemgr_remove_ne(ne);
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return count;
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}
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static ssize_t fw_get_destroy_node(struct bus_type *bus, char *buf)
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{
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return sprintf(buf, "You can destroy in_limbo nodes by writing their GUID to this file\n");
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}
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static BUS_ATTR(destroy_node, S_IWUSR | S_IRUGO, fw_get_destroy_node, fw_set_destroy_node);
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static ssize_t fw_set_rescan(struct bus_type *bus, const char *buf, size_t count)
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{
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if (simple_strtoul(buf, NULL, 10) == 1)
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bus_rescan_devices(&ieee1394_bus_type);
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return count;
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}
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static ssize_t fw_get_rescan(struct bus_type *bus, char *buf)
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{
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return sprintf(buf, "You can force a rescan of the bus for "
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"drivers by writing a 1 to this file\n");
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}
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static BUS_ATTR(rescan, S_IWUSR | S_IRUGO, fw_get_rescan, fw_set_rescan);
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static ssize_t fw_set_ignore_drivers(struct bus_type *bus, const char *buf, size_t count)
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{
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int state = simple_strtoul(buf, NULL, 10);
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if (state == 1)
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ignore_drivers = 1;
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else if (!state)
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ignore_drivers = 0;
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return count;
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}
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static ssize_t fw_get_ignore_drivers(struct bus_type *bus, char *buf)
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{
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return sprintf(buf, "%d\n", ignore_drivers);
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}
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static BUS_ATTR(ignore_drivers, S_IWUSR | S_IRUGO, fw_get_ignore_drivers, fw_set_ignore_drivers);
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struct bus_attribute *const fw_bus_attrs[] = {
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&bus_attr_destroy_node,
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&bus_attr_rescan,
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&bus_attr_ignore_drivers,
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NULL
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};
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fw_attr(ne, struct node_entry, capabilities, unsigned int, "0x%06x\n")
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fw_attr(ne, struct node_entry, nodeid, unsigned int, "0x%04x\n")
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fw_attr(ne, struct node_entry, vendor_id, unsigned int, "0x%06x\n")
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fw_attr_td(ne, struct node_entry, vendor_name_kv)
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fw_attr(ne, struct node_entry, vendor_oui, const char *, "%s\n")
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fw_attr(ne, struct node_entry, guid, unsigned long long, "0x%016Lx\n")
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fw_attr(ne, struct node_entry, guid_vendor_id, unsigned int, "0x%06x\n")
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fw_attr(ne, struct node_entry, guid_vendor_oui, const char *, "%s\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(ud, struct unit_directory, vendor_oui, const char *, "%s\n")
|
|
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;
|
|
struct ieee1394_device_id *id;
|
|
int length = 0;
|
|
char *scratch = buf;
|
|
|
|
driver = container_of(drv, struct hpsb_protocol_driver, driver);
|
|
|
|
for (id = driver->id_table; 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++)
|
|
driver_create_file(drv, fw_drv_attrs[i]);
|
|
}
|
|
|
|
|
|
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++)
|
|
device_create_file(dev, fw_ne_attrs[i]);
|
|
}
|
|
|
|
|
|
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++)
|
|
device_create_file(dev, fw_host_attrs[i]);
|
|
}
|
|
|
|
|
|
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");
|
|
if ((ne = find_entry_by_nodeid(host, host->busmgr_id)))
|
|
sysfs_create_link(&dev->kobj, &ne->device.kobj, "busmgr_id");
|
|
if ((ne = find_entry_by_nodeid(host, host->node_id)))
|
|
sysfs_create_link(&dev->kobj, &ne->device.kobj, "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++)
|
|
device_create_file(dev, fw_ud_attrs[i]);
|
|
|
|
if (ud->flags & UNIT_DIRECTORY_SPECIFIER_ID)
|
|
device_create_file(dev, &dev_attr_ud_specifier_id);
|
|
|
|
if (ud->flags & UNIT_DIRECTORY_VERSION)
|
|
device_create_file(dev, &dev_attr_ud_version);
|
|
|
|
if (ud->flags & UNIT_DIRECTORY_VENDOR_ID) {
|
|
device_create_file(dev, &dev_attr_ud_vendor_id);
|
|
if (ud->vendor_name_kv)
|
|
device_create_file(dev, &dev_attr_ud_vendor_name_kv);
|
|
}
|
|
|
|
if (ud->flags & UNIT_DIRECTORY_MODEL_ID) {
|
|
device_create_file(dev, &dev_attr_ud_model_id);
|
|
if (ud->model_name_kv)
|
|
device_create_file(dev, &dev_attr_ud_model_name_kv);
|
|
}
|
|
}
|
|
|
|
|
|
static int nodemgr_bus_match(struct device * dev, struct device_driver * drv)
|
|
{
|
|
struct hpsb_protocol_driver *driver;
|
|
struct unit_directory *ud;
|
|
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);
|
|
driver = container_of(drv, struct hpsb_protocol_driver, driver);
|
|
|
|
if (ud->ne->in_limbo || ud->ignore_driver)
|
|
return 0;
|
|
|
|
for (id = driver->id_table; 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 void nodemgr_remove_uds(struct node_entry *ne)
|
|
{
|
|
struct class_device *cdev, *next;
|
|
struct unit_directory *ud;
|
|
|
|
list_for_each_entry_safe(cdev, next, &nodemgr_ud_class.children, node) {
|
|
ud = container_of(cdev, struct unit_directory, class_dev);
|
|
|
|
if (ud->ne != ne)
|
|
continue;
|
|
|
|
class_device_unregister(&ud->class_dev);
|
|
device_unregister(&ud->device);
|
|
}
|
|
}
|
|
|
|
|
|
static void nodemgr_remove_ne(struct node_entry *ne)
|
|
{
|
|
struct device *dev = &ne->device;
|
|
|
|
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);
|
|
|
|
class_device_unregister(&ne->class_dev);
|
|
device_unregister(dev);
|
|
|
|
put_device(dev);
|
|
}
|
|
|
|
static int __nodemgr_remove_host_dev(struct device *dev, void *data)
|
|
{
|
|
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, __nodemgr_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 host_info *hi, nodeid_t nodeid,
|
|
unsigned int generation)
|
|
{
|
|
struct hpsb_host *host = hi->host;
|
|
struct node_entry *ne;
|
|
|
|
ne = kzalloc(sizeof(*ne), GFP_KERNEL);
|
|
if (!ne)
|
|
return NULL;
|
|
|
|
ne->host = host;
|
|
ne->nodeid = nodeid;
|
|
ne->generation = generation;
|
|
ne->needs_probe = 1;
|
|
|
|
ne->guid = guid;
|
|
ne->guid_vendor_id = (guid >> 40) & 0xffffff;
|
|
ne->guid_vendor_oui = nodemgr_find_oui_name(ne->guid_vendor_id);
|
|
ne->csr = csr;
|
|
|
|
memcpy(&ne->device, &nodemgr_dev_template_ne,
|
|
sizeof(ne->device));
|
|
ne->device.parent = &host->device;
|
|
snprintf(ne->device.bus_id, BUS_ID_SIZE, "%016Lx",
|
|
(unsigned long long)(ne->guid));
|
|
|
|
ne->class_dev.dev = &ne->device;
|
|
ne->class_dev.class = &nodemgr_ne_class;
|
|
snprintf(ne->class_dev.class_id, BUS_ID_SIZE, "%016Lx",
|
|
(unsigned long long)(ne->guid));
|
|
|
|
device_register(&ne->device);
|
|
class_device_register(&ne->class_dev);
|
|
get_device(&ne->device);
|
|
|
|
if (ne->guid_vendor_oui)
|
|
device_create_file(&ne->device, &dev_attr_ne_guid_vendor_oui);
|
|
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;
|
|
}
|
|
|
|
|
|
static struct node_entry *find_entry_by_guid(u64 guid)
|
|
{
|
|
struct class *class = &nodemgr_ne_class;
|
|
struct class_device *cdev;
|
|
struct node_entry *ne, *ret_ne = NULL;
|
|
|
|
down_read(&class->subsys.rwsem);
|
|
list_for_each_entry(cdev, &class->children, node) {
|
|
ne = container_of(cdev, struct node_entry, class_dev);
|
|
|
|
if (ne->guid == guid) {
|
|
ret_ne = ne;
|
|
break;
|
|
}
|
|
}
|
|
up_read(&class->subsys.rwsem);
|
|
|
|
return ret_ne;
|
|
}
|
|
|
|
|
|
static struct node_entry *find_entry_by_nodeid(struct hpsb_host *host, nodeid_t nodeid)
|
|
{
|
|
struct class *class = &nodemgr_ne_class;
|
|
struct class_device *cdev;
|
|
struct node_entry *ne, *ret_ne = NULL;
|
|
|
|
down_read(&class->subsys.rwsem);
|
|
list_for_each_entry(cdev, &class->children, node) {
|
|
ne = container_of(cdev, struct node_entry, class_dev);
|
|
|
|
if (ne->host == host && ne->nodeid == nodeid) {
|
|
ret_ne = ne;
|
|
break;
|
|
}
|
|
}
|
|
up_read(&class->subsys.rwsem);
|
|
|
|
return ret_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;
|
|
|
|
snprintf(ud->device.bus_id, BUS_ID_SIZE, "%s-%u",
|
|
ne->device.bus_id, ud->id);
|
|
|
|
ud->class_dev.dev = &ud->device;
|
|
ud->class_dev.class = &nodemgr_ud_class;
|
|
snprintf(ud->class_dev.class_id, BUS_ID_SIZE, "%s-%u",
|
|
ne->device.bus_id, ud->id);
|
|
|
|
device_register(&ud->device);
|
|
class_device_register(&ud->class_dev);
|
|
get_device(&ud->device);
|
|
|
|
if (ud->vendor_oui)
|
|
device_create_file(&ud->device, &dev_attr_ud_vendor_oui);
|
|
nodemgr_create_ud_dev_files(ud);
|
|
}
|
|
|
|
|
|
/* 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 host_info *hi, 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_CONFIG_ROM_SPACE_BASE;
|
|
ud->ud_kv = ud_kv;
|
|
ud->id = (*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;
|
|
|
|
if (ud->vendor_id)
|
|
ud->vendor_oui = nodemgr_find_oui_name(ud->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:
|
|
ud->vendor_name_kv = kv;
|
|
csr1212_keep_keyval(kv);
|
|
break;
|
|
|
|
case CSR1212_KV_ID_MODEL:
|
|
ud->model_name_kv = kv;
|
|
csr1212_keep_keyval(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 = kmalloc(sizeof(*ud_child), GFP_KERNEL);
|
|
if (!ud_child)
|
|
goto unit_directory_error;
|
|
memcpy(ud_child, ud, sizeof(*ud_child));
|
|
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(hi, 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;
|
|
|
|
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 host_info *hi, struct node_entry *ne)
|
|
{
|
|
unsigned int ud_id = 0;
|
|
struct csr1212_dentry *dentry;
|
|
struct csr1212_keyval *kv;
|
|
u8 last_key_id = 0;
|
|
|
|
ne->needs_probe = 0;
|
|
|
|
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;
|
|
|
|
if (ne->vendor_id)
|
|
ne->vendor_oui = nodemgr_find_oui_name(ne->vendor_id);
|
|
break;
|
|
|
|
case CSR1212_KV_ID_NODE_CAPABILITIES:
|
|
ne->capabilities = kv->value.immediate;
|
|
break;
|
|
|
|
case CSR1212_KV_ID_UNIT:
|
|
nodemgr_process_unit_directory(hi, 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) {
|
|
ne->vendor_name_kv = kv;
|
|
csr1212_keep_keyval(kv);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
last_key_id = kv->key.id;
|
|
}
|
|
|
|
if (ne->vendor_oui)
|
|
device_create_file(&ne->device, &dev_attr_ne_vendor_oui);
|
|
if (ne->vendor_name_kv)
|
|
device_create_file(&ne->device, &dev_attr_ne_vendor_name_kv);
|
|
}
|
|
|
|
#ifdef CONFIG_HOTPLUG
|
|
|
|
static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
|
|
char *buffer, int buffer_size)
|
|
{
|
|
struct unit_directory *ud;
|
|
int i = 0;
|
|
int length = 0;
|
|
/* ieee1394:venNmoNspNverN */
|
|
char buf[8 + 1 + 3 + 8 + 2 + 8 + 2 + 8 + 3 + 8 + 1];
|
|
|
|
if (!cdev)
|
|
return -ENODEV;
|
|
|
|
ud = container_of(cdev, struct unit_directory, class_dev);
|
|
|
|
if (ud->ne->in_limbo || ud->ignore_driver)
|
|
return -ENODEV;
|
|
|
|
#define PUT_ENVP(fmt,val) \
|
|
do { \
|
|
int printed; \
|
|
envp[i++] = buffer; \
|
|
printed = snprintf(buffer, buffer_size - length, \
|
|
fmt, val); \
|
|
if ((buffer_size - (length+printed) <= 0) || (i >= num_envp)) \
|
|
return -ENOMEM; \
|
|
length += printed+1; \
|
|
buffer += printed+1; \
|
|
} 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
|
|
|
|
envp[i] = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
static int nodemgr_uevent(struct class_device *cdev, char **envp, int num_envp,
|
|
char *buffer, int buffer_size)
|
|
{
|
|
return -ENODEV;
|
|
}
|
|
|
|
#endif /* CONFIG_HOTPLUG */
|
|
|
|
|
|
int hpsb_register_protocol(struct hpsb_protocol_driver *driver)
|
|
{
|
|
int ret;
|
|
|
|
/* This will cause a probe for devices */
|
|
ret = driver_register(&driver->driver);
|
|
if (!ret)
|
|
nodemgr_create_drv_files(driver);
|
|
|
|
return ret;
|
|
}
|
|
|
|
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,
|
|
struct host_info *hi, 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 = 1;
|
|
} 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);
|
|
}
|
|
|
|
if (ne->in_limbo)
|
|
nodemgr_resume_ne(ne);
|
|
|
|
/* Mark the node current */
|
|
ne->generation = generation;
|
|
}
|
|
|
|
|
|
|
|
static void nodemgr_node_scan_one(struct host_info *hi,
|
|
nodeid_t nodeid, int generation)
|
|
{
|
|
struct hpsb_host *host = hi->host;
|
|
struct node_entry *ne;
|
|
octlet_t guid;
|
|
struct csr1212_csr *csr;
|
|
struct nodemgr_csr_info *ci;
|
|
u8 *speed;
|
|
|
|
ci = kmalloc(sizeof(*ci), GFP_KERNEL);
|
|
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, hi, nodeid, generation);
|
|
else
|
|
nodemgr_update_node(ne, csr, hi, nodeid, generation);
|
|
}
|
|
|
|
|
|
static void nodemgr_node_scan(struct host_info *hi, int generation)
|
|
{
|
|
int count;
|
|
struct hpsb_host *host = hi->host;
|
|
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(hi, nodeid++, generation);
|
|
}
|
|
}
|
|
|
|
|
|
/* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader. */
|
|
static void nodemgr_suspend_ne(struct node_entry *ne)
|
|
{
|
|
struct class_device *cdev;
|
|
struct unit_directory *ud;
|
|
|
|
HPSB_DEBUG("Node suspended: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
|
|
NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
|
|
|
|
ne->in_limbo = 1;
|
|
device_create_file(&ne->device, &dev_attr_ne_in_limbo);
|
|
|
|
down_write(&ne->device.bus->subsys.rwsem);
|
|
list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
|
|
ud = container_of(cdev, struct unit_directory, class_dev);
|
|
|
|
if (ud->ne != ne)
|
|
continue;
|
|
|
|
if (ud->device.driver &&
|
|
(!ud->device.driver->suspend ||
|
|
ud->device.driver->suspend(&ud->device, PMSG_SUSPEND)))
|
|
device_release_driver(&ud->device);
|
|
}
|
|
up_write(&ne->device.bus->subsys.rwsem);
|
|
}
|
|
|
|
|
|
static void nodemgr_resume_ne(struct node_entry *ne)
|
|
{
|
|
struct class_device *cdev;
|
|
struct unit_directory *ud;
|
|
|
|
ne->in_limbo = 0;
|
|
device_remove_file(&ne->device, &dev_attr_ne_in_limbo);
|
|
|
|
down_read(&nodemgr_ud_class.subsys.rwsem);
|
|
down_read(&ne->device.bus->subsys.rwsem);
|
|
list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
|
|
ud = container_of(cdev, struct unit_directory, class_dev);
|
|
|
|
if (ud->ne != ne)
|
|
continue;
|
|
|
|
if (ud->device.driver && ud->device.driver->resume)
|
|
ud->device.driver->resume(&ud->device);
|
|
}
|
|
up_read(&ne->device.bus->subsys.rwsem);
|
|
up_read(&nodemgr_ud_class.subsys.rwsem);
|
|
|
|
HPSB_DEBUG("Node resumed: ID:BUS[" NODE_BUS_FMT "] GUID[%016Lx]",
|
|
NODE_BUS_ARGS(ne->host, ne->nodeid), (unsigned long long)ne->guid);
|
|
}
|
|
|
|
|
|
/* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader. */
|
|
static void nodemgr_update_pdrv(struct node_entry *ne)
|
|
{
|
|
struct unit_directory *ud;
|
|
struct hpsb_protocol_driver *pdrv;
|
|
struct class_device *cdev;
|
|
|
|
list_for_each_entry(cdev, &nodemgr_ud_class.children, node) {
|
|
ud = container_of(cdev, struct unit_directory, class_dev);
|
|
if (ud->ne != ne || !ud->device.driver)
|
|
continue;
|
|
|
|
pdrv = container_of(ud->device.driver, struct hpsb_protocol_driver, driver);
|
|
|
|
if (pdrv->update && pdrv->update(ud)) {
|
|
down_write(&ud->device.bus->subsys.rwsem);
|
|
device_release_driver(&ud->device);
|
|
up_write(&ud->device.bus->subsys.rwsem);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* 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 ret;
|
|
|
|
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. */
|
|
ret = hpsb_read(ne->host, ne->nodeid, generation, bc_addr, &bc_remote,
|
|
sizeof(bc_remote));
|
|
if (!ret && bc_remote & cpu_to_be32(0x80000000) &&
|
|
bc_remote != bc_local)
|
|
hpsb_node_write(ne, bc_addr, &bc_local, sizeof(bc_local));
|
|
}
|
|
|
|
|
|
/* Caller needs to hold nodemgr_ud_class.subsys.rwsem as reader because the
|
|
* calls to nodemgr_update_pdrv() and nodemgr_suspend_ne() here require it. */
|
|
static void nodemgr_probe_ne(struct host_info *hi, struct node_entry *ne, int generation)
|
|
{
|
|
struct device *dev;
|
|
|
|
if (ne->host != hi->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(hi, ne);
|
|
else if (ne->generation == generation)
|
|
nodemgr_update_pdrv(ne);
|
|
else
|
|
nodemgr_suspend_ne(ne);
|
|
|
|
put_device(dev);
|
|
}
|
|
|
|
|
|
static void nodemgr_node_probe(struct host_info *hi, int generation)
|
|
{
|
|
struct hpsb_host *host = hi->host;
|
|
struct class *class = &nodemgr_ne_class;
|
|
struct class_device *cdev;
|
|
struct node_entry *ne;
|
|
|
|
/* 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. (Well, those probes need some
|
|
* improvement...) */
|
|
|
|
down_read(&class->subsys.rwsem);
|
|
list_for_each_entry(cdev, &class->children, node) {
|
|
ne = container_of(cdev, struct node_entry, class_dev);
|
|
if (!ne->needs_probe)
|
|
nodemgr_probe_ne(hi, ne, generation);
|
|
}
|
|
list_for_each_entry(cdev, &class->children, node) {
|
|
ne = container_of(cdev, struct node_entry, class_dev);
|
|
if (ne->needs_probe)
|
|
nodemgr_probe_ne(hi, ne, generation);
|
|
}
|
|
up_read(&class->subsys.rwsem);
|
|
|
|
|
|
/* If we had a bus reset while we were scanning the bus, it is
|
|
* possible that we did not probe all nodes. In that case, we
|
|
* skip the clean up for now, since we could remove nodes that
|
|
* were still on the bus. Another bus scan is pending which will
|
|
* do the clean up eventually.
|
|
*
|
|
* 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 (generation == get_hpsb_generation(host))
|
|
bus_rescan_devices(&ieee1394_bus_type);
|
|
|
|
return;
|
|
}
|
|
|
|
static int nodemgr_send_resume_packet(struct hpsb_host *host)
|
|
{
|
|
struct hpsb_packet *packet;
|
|
int ret = 1;
|
|
|
|
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);
|
|
ret = hpsb_send_packet(packet);
|
|
}
|
|
if (ret)
|
|
HPSB_WARN("fw-host%d: Failed to broadcast resume packet",
|
|
host->id);
|
|
return ret;
|
|
}
|
|
|
|
/* 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 *__hi)
|
|
{
|
|
struct host_info *hi = (struct host_info *)__hi;
|
|
struct hpsb_host *host = hi->host;
|
|
unsigned int g, generation = get_hpsb_generation(host) - 1;
|
|
int i, reset_cycles = 0;
|
|
|
|
/* 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)
|
|
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;
|
|
|
|
if (mutex_lock_interruptible(&nodemgr_serialize)) {
|
|
if (try_to_freeze())
|
|
continue;
|
|
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++) {
|
|
if (msleep_interruptible(63) || kthread_should_stop())
|
|
goto unlock_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 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++;
|
|
mutex_unlock(&nodemgr_serialize);
|
|
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(hi, generation);
|
|
|
|
/* This actually does the full probe, with sysfs
|
|
* registration. */
|
|
nodemgr_node_probe(hi, generation);
|
|
|
|
/* Update some of our sysfs symlinks */
|
|
nodemgr_update_host_dev_links(host);
|
|
|
|
mutex_unlock(&nodemgr_serialize);
|
|
}
|
|
unlock_exit:
|
|
mutex_unlock(&nodemgr_serialize);
|
|
exit:
|
|
HPSB_VERBOSE("NodeMgr: Exiting thread");
|
|
return 0;
|
|
}
|
|
|
|
int nodemgr_for_each_host(void *__data, int (*cb)(struct hpsb_host *, void *))
|
|
{
|
|
struct class *class = &hpsb_host_class;
|
|
struct class_device *cdev;
|
|
struct hpsb_host *host;
|
|
int error = 0;
|
|
|
|
down_read(&class->subsys.rwsem);
|
|
list_for_each_entry(cdev, &class->children, node) {
|
|
host = container_of(cdev, struct hpsb_host, class_dev);
|
|
|
|
if ((error = cb(host, __data)))
|
|
break;
|
|
}
|
|
up_read(&class->subsys.rwsem);
|
|
|
|
return error;
|
|
}
|
|
|
|
/* The following four 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.
|
|
*/
|
|
|
|
void hpsb_node_fill_packet(struct node_entry *ne, struct hpsb_packet *pkt)
|
|
{
|
|
pkt->host = ne->host;
|
|
pkt->generation = ne->generation;
|
|
barrier();
|
|
pkt->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;
|
|
|
|
barrier();
|
|
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, hi, "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 ret;
|
|
|
|
ret = class_register(&nodemgr_ne_class);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
ret = class_register(&nodemgr_ud_class);
|
|
if (ret < 0) {
|
|
class_unregister(&nodemgr_ne_class);
|
|
return ret;
|
|
}
|
|
|
|
hpsb_register_highlevel(&nodemgr_highlevel);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void cleanup_ieee1394_nodemgr(void)
|
|
{
|
|
hpsb_unregister_highlevel(&nodemgr_highlevel);
|
|
|
|
class_unregister(&nodemgr_ud_class);
|
|
class_unregister(&nodemgr_ne_class);
|
|
}
|